19-1647; Rev 1; 6/00
`
`MAX1711 Voltage Positioning Evaluation Kit
`
`Evaluates: MAX1711
`
`Features
`
`o Output Voltage Positioned
`o Reduces CPU Power Consumption
`o Lowest Number of Output Capacitors (only 4)
`o High Speed, Accuracy, and Efficiency
`o Fast-Response Quick-PWM™ Architecture
`o 7V to 24V Input Voltage Range
`o 0.925V to 2V Output Voltage Range
`o 12A Load-Current Capability (14.1A peak)
`o 550kHz Switching Frequency
`o Power-Good Output
`o 24-Pin QSOP Package
`o Low-Profile Components
`o Fully Assembled and Tested
`
`DESIGNATION
`
`QTY
`
`D2
`
`D3
`
`D4
`
`J1
`
`JU1
`JU3–9
`
`L1
`
`N1
`
`N2, N3
`
`1
`
`1
`
`1
`
`1
`
`1
`0
`
`1
`
`1
`
`2
`
`Component List
`DESCRIPTION
`100mA Schottky diode
`Central Semiconductor CMPSH-3
`
`1A Schottky diode
`Motorola MBRS130LT3,
`International Rectifier 10BQ040, or
`Nihon EC10QS03
`
`200mA switching diode
`Central Semiconductor CMPD2838
`
`Scope-probe connector
`Berg Electronics 33JR135-1
`
`2-pin header
`Not installed
`
`0.47µH power inductor
`Sumida CEP 125 series 4712-T006
`
`N-channel MOSFET (SO-8)
`International Rectifier IRF7811 or
`IRF7811A
`
`N-channel MOSFET (SO-8)
`International Rectifier IRF7805 or
`IRF7811 or IRF 7811A
`
`General Description
`The MAX1711 evaluation kit (EV kit) demonstrates the
`high-power, dynamically adjustable notebook CPU appli-
`cation circuit with voltage positioning. Voltage positioning
`decreases CPU power consumption and reduces output
`capacitance requirements. This DC-DC converter steps
`down high-voltage batteries and/or AC adapters, gener-
`ating a precision, low-voltage CPU core VCC rail.
`The MAX1711 EV kit provides a digitally adjustable
`0.925V to 2V output voltage from a 7V to 24V battery input
`range. It delivers sustained output current of 12A and
`14.1A peaks, operating at a 550kHz switching frequency,
`and has superior line- and load-transient response. The
`MAX1711 EV kit is designed to accomplish output voltage
`transitions in a controlled amount of time with limited input
`surge current.
`This EV kit is a fully assembled and tested circuit board.
`Ordering Information
`TEMP. RANGE
`PART
`IC PACKAGE
`24 QSOP
`0°C to +70°C
`MAX1711EVKIT
`Quick-PWM is a trademark of Maxim Integrated Products.
`
`DESIGNATION
`
`QTY
`
`C1–C4, C20
`
`C5, C6,
`C7, C16
`
`C8
`
`C9
`
`C10
`
`C11, C12
`C13
`C14
`C15
`C18
`
`D1
`
`5
`
`4
`
`1
`
`1
`
`0
`
`2
`0
`1
`1
`1
`
`1
`
`DESCRIPTION
`10µF, 25V ceramic capacitors
`Taiyo Yuden TMK432BJ106KM,
`Tokin C34Y5U1E106Z, or
`United Chemi-Con/Marcon
`THCR50E1E106ZT
`220µF, 2.5V, 25mΩ low-ESR polymer
`capacitors
`Panasonic EEFUEOE 221R
`10µF, 6.3V ceramic capacitor
`Taiyo Yuden JMK325BJ106MN or
`TDK C3225X5R1A106M
`0.1µF ceramic capacitor
`
`0.01µF ceramic capacitor
`(not installed)
`
`0.22µF ceramic capacitors
`0.1µF ceramic capacitor (not installed)
`470pF ceramic capacitor
`1µF ceramic capacitor
`1000pF ceramic capacitor
`2A Schottky diode
`SGS-Thomson STPS2L25U or
`Nihon EC31QS03L
`
`________________________________________________________________ Maxim Integrated Products 1
`For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
`For small orders, phone 1-800-835-8769.
`
`MICROCHIP TECHNOLOGY INC. EXHIBIT 1012
`Page 1 of 10
`
`

`

`MAX1711 Voltage Positioning Evaluation Kit
`
`Component List (continued)
`DESIGNATION
`QTY
`DESCRIPTION
`N-channel MOSFETs
`Motorola 2N7002 or
`Central Semiconductor 2N7002
`20Ω ±5% resistor
`Not installed
`1MΩ ±5% resistor
`100kΩ ±5% resistor
`100kΩ ±1% resistor
`140kΩ ±1% resistor
`1kΩ ±5% resistor
`100Ω ±5% resistor
`0.005Ω ±1%, 1W resistor
`Dale WSL-2512-R005F
`1MΩ ±1% resistor
`10kΩ ±1% resistor
`DIP-10 dip switch
`Momentary switch, normally open
`Digi-Key P8006/7S
`MAX1711EEG (24-pin QSOP)
`Exclusive-OR gate (5-Pin SSOP)
`Toshiba TC4S30F
`Shunt (JU1)
`MAX1711 PC board
`MAX1711 data sheet
`
`0
`
`1
`0
`1
`1
`1
`1
`1
`1
`
`1
`
`1
`1
`1
`
`1
`
`1
`
`0
`
`1
`1
`1
`
`Component Suppliers
`
`SUPPLIER
`
`PHONE
`
`FAX
`
`Central
`Semiconductor
`Dale-Vishay
`Fairchild
`International
`Rectifier
`Kemet
`Motorola
`Nihon
`Panasonic
`Sanyo
`SGS-Thomson
`Sumida
`Taiyo Yuden
`TDK
`Tokin
`
`516-435-1110
`
`516-435-1824
`
`402-564-3131
`408-721-2181
`
`402-563-6418
`408-721-1635
`
`310-322-3331
`
`310-322-3332
`
`408-986-0424
`602-303-5454
`847-843-7500
`714-373-7939
`619-661-6835
`617-259-0300
`708-956-0666
`408-573-4150
`847-390-4373
`408-432-8020
`
`408-986-1442
`602-994-6430
`847-843-2798
`714-373-7183
`619-661-1055
`617-259-9442
`708-956-0702
`408-573-4159
`847-390-4428
`408-434-0375
`
`Note: Please indicate that you are using the MAX1711 when
`contacting these component suppliers.
`
`5) Turn on battery power prior to +5V bias power; oth-
`erwise, the output UVLO timer will time out and the
`FAULT latch will be set, disabling the regulator until
`+5V power is cycled or shutdown is toggled (press
`the RESET button).
`6) Observe the output with the DMM and/or oscillo-
`scope. Look at the LX switching-node and MOSFET
`gate-drive signals while varying the load current.
`Detailed Description
`This 14A buck-regulator design is optimized for a
`550kHz frequency and output voltage settings around
`1.6V. At VOUT = 1.6V, inductor ripple is approximately
`35%, with a resulting pulse-skipping threshold at rough-
`ly ILOAD = 2.2A.
`
`Setting the Output Voltage
`Select the output voltage using the D0–D4 pins. The
`MAX1711 uses an internal 5-bit DAC as a feedback
`resistor voltage divider. The output voltage can be digi-
`tally set from 0.925V to 2V using the D0–D4 inputs.
`Switch SW1 sets the desired output voltage. See Table 1.
`
`Recommended Equipment
`• 7V to 24V, >20W power supply, battery, or notebook
`AC adapter
`• DC bias power supply, 5V at 100mA
`• Dummy load capable of sinking 14.1A
`• Digital multimeter (DMM)
`• 100MHz dual-trace oscilloscope
`
`Quick Start
`1) Ensure that the circuit is connected correctly to the
`supplies and dummy load prior to applying power.
`2) Ensure that the shunt is connected at JU1 (SHDN =
`VCC).
`3) Set switch SW1 per Table 1 to achieve the desired
`output voltage.
`4) Connect +5V or ground to the AC Present pad to dis-
`able the transition detector circuit. See the Dynamic
`Output Voltage Transitions section for more informa-
`tion regarding the transition detector circuit.
`
`2
`
`_______________________________________________________________________________________
`
`N4, N5
`(not installed)
`
`R1
`R2
`R3
`R4
`R6
`R9
`R10
`R11
`
`R12
`
`R13
`R14
`SW1
`
`SW2
`
`U1
`U2
`(not installed)
`None
`None
`None
`
`Evaluates: MAX1711
`
`MICROCHIP TECHNOLOGY INC. EXHIBIT 1012
`Page 2 of 10
`
`

`

`MAX1711 Voltage Positioning Evaluation Kit
`
`Evaluates: MAX1711
`
`tial output voltage 20mV high, and R12 (5mΩ) causes
`the output voltage to drop with increasing load (60mV
`or about 4% of 1.6V at 12A).
`Setting the output voltage high allows a larger step-
`down when the output current increases suddenly, and
`regulating at the lower output voltage under load allows
`a larger step-up when the output current suddenly
`decreases. Allowing a larger step size means that the
`output capacitance can be reduced and the capaci-
`tor’s ESR can be increased. If voltage positioning is not
`used, one additional output capacitor is required to
`meet the same transient specification.
`Reduced power consumption at high load currents is an
`additional benefit of voltage positioning. Because the
`output voltage is reduced under load, the CPU draws
`less current. This results in lower power dissipation in
`the CPU, though some extra power is dissipated in R12.
`For a 1.6V, 12A nominal output, reducing the output
`voltage 2.75% (1.25% - 4%) gives an output voltage of
`1.556V and an output current of 11.67A. So the CPU
`power consumption is reduced from 19.2W to 18.16W.
`The additional power consumption of R12 is 5mΩ ·
`11.7A2 = 0.68W, and the overall power savings is 19.2 –
`(18.16 + 0.68) = 0.36W. In effect, 1W of CPU dissipation
`is saved and the power supply dissipates much of the
`savings, but both the net savings and the transfer of dis-
`sipation away from the hot CPU are beneficial.
`Dynamic Output Voltage Transitions
`If the DAC inputs (D0–D4) are changed, the output volt-
`age will change accordingly. However, under some cir-
`cumstances, the output voltage transition may be slow-
`er than desired. All transitions to a higher voltage will
`occur very quickly, with the circuit operating at the cur-
`rent limit set by the voltage at the ILIM pin. Transitions
`to a lower output voltage require the circuit or the load
`to sink current. If SKIP is held low (PFM mode), the cir-
`cuit won’t sink current, so the output voltage will
`decrease only at the rate determined by the load cur-
`rent. This is often acceptable, but some applications
`require output voltage transitions to be completed with-
`in a set time limit.
`Powering CPUs with Intel’s Geyserville technology is
`such an application. The specification requires that out-
`put voltage transitions occur within 100µs after a DAC
`code change. This fast transition timing means that the
`regulator circuit must sink as well as source current.
`The simplest way of meeting this requirement is to use
`the MAX1711’s fixed-frequency PWM mode (set SKIP
`high), allowing the regulator to sink or source currents
`equally. This EV kit is shipped with SKIP set high.
`Although this results in a VDD quiescent current to
`20mA or more, depending on the MOSFETs and
`
`Table 1. MAX1710/1711 Output Voltage
`Adjustment Settings
`
`OUTPUT
`VOLTAGE (V)
`2.00
`1.95
`1.90
`1.85
`1.80
`1.75
`1.70
`1.65
`1.60
`1.55
`1.50
`1.45
`1.40
`1.35
`1.30
`Shutdown
`1.275
`1.250
`1.225
`1.200
`1.175
`1.150
`1.125
`1.100
`1.075
`1.050
`1.025
`1.000
`0.975
`0.950
`0.925
`Shutdown
`
`D4
`
`D3
`
`D2
`
`D1
`
`D0
`
`0
`0
`1
`1
`0
`0
`1
`1
`0
`0
`1
`1
`0
`0
`1
`1
`0
`0
`1
`1
`0
`0
`1
`1
`0
`0
`1
`1
`0
`0
`1
`1
`
`0
`1
`0
`1
`0
`1
`0
`1
`0
`1
`0
`1
`0
`1
`0
`1
`0
`1
`0
`1
`0
`1
`0
`1
`0
`1
`0
`1
`0
`1
`0
`1
`
`0
`0
`0
`0
`1
`1
`1
`1
`0
`0
`0
`0
`1
`1
`1
`1
`0
`0
`0
`0
`1
`1
`1
`1
`0
`0
`0
`0
`1
`1
`1
`1
`
`0
`0
`0
`0
`0
`0
`0
`0
`1
`1
`1
`1
`1
`1
`1
`1
`0
`0
`0
`0
`0
`0
`0
`0
`1
`1
`1
`1
`1
`1
`1
`1
`
`0 0 0 0 0 0 0 1 1 1 1 1 1 1 0
`
`0
`
`1 1 1 1 1 1 1 1
`
`1 1 1 1 1 1 1 1
`
`Voltage Positioning
`The MAX1711 EV kit uses voltage positioning to mini-
`mize the output capacitor requirements of the Intel
`Coppermine CPU’s transient voltage specification
`(-7.5% to +7.5%). The output voltage is initially set
`slightly high (1.25%) and then allowed to regulate lower
`as the load current increases. R13 and R14 set the ini-
`
`_______________________________________________________________________________________ 3
`
`MICROCHIP TECHNOLOGY INC. EXHIBIT 1012
`Page 3 of 10
`
`

`

`MAX1711 Voltage Positioning Evaluation Kit
`
`switching frequency used, it is often an acceptable
`choice. A similar but more clever approach is to use
`PWM mode only during transitions. This approach
`allows the regulator to sink current when needed and to
`operate with low quiescent current the rest of the time,
`but it requires that the system know when the transitions
`will occur. Any system with a changing output voltage
`must know when its output voltage changes occur.
`Usually, it is the system that initiates the transition, either
`by driving the DAC inputs to new levels or by selecting
`new DAC inputs with a digital mux. While it is possible
`for the regulator to recognize transitions by watching for
`DAC code changes, the glue logic needed to add that
`feature to existing controllers is unnecessarily compli-
`cated (refer to the MAX1710/MAX1711 data sheet,
`Figure 10). It is easier to use the chipset signal that
`selects DAC codes at the mux, or some other system
`signal to inform the regulator that a code change is
`occurring.
`For easy modification, the MAX1711 EV kit is designed
`to use an external chipset signal to indicate DAC code
`transitions (install U2, R2, C10, C13; short JU9 and cut
`JU10). This signal connects to the EV kit’s AC Present
`pad and should have 5V logic levels. Logic edges on
`AC Present are detected by exclusive-OR gate U2,
`which generates a 60µs pulse on each edge (deter-
`mined by R2 and C10). These pulses drive SKIP, allow-
`ing the regulator to sink current during transitions.
`Because U2 is powered by VCC (5V), the signal con-
`nected to AC Present must have 5V logic levels so that
`U2’s output pulses will be symmetric for positive- and
`negative-going transitions. If the signal that’s available
`to drive AC Present has a different logic level, either
`level-shift the signal or lift U2’s supply pin and power it
`from the appropriate supply rail.
`In addition to controlling SKIP, the pulses from U2 have
`two other functions, which are optional. U2’s output dri-
`ves the gates of two small-signal MOSFETs, N4 and N5
`(not installed). N4 is used to temporarily reduce the cir-
`cuit’s current limit, in effect soft-starting the regulator.
`This reduces the battery surge current, which otherwise
`would discharge (upward transitions) or charge (down-
`ward transitions) the regulator input (battery) at a rate
`determined by the regulator’s maximum current limit. N5
`pulls down on PGOOD during transitions, indicating that
`the output voltage is in transition.
`Load-Transient Measurement
`One interesting experiment is to subject the output to
`large, fast load transients and observe the output with
`an oscilloscope. This necessitates careful instrumenta-
`tion of the output, using the supplied scope-probe jack.
`
`Accurate measurement of output ripple and load-tran-
`sient response invariably requires that ground clip
`leads be completely avoided and that the probe hat be
`removed to expose the GND shield, so the probe can
`be plugged directly into the jack. Otherwise, EMI and
`noise pickup will corrupt the waveforms.
`Most benchtop electronic loads intended for power-
`supply testing are unable to subject the DC-DC con-
`verter to ultra-fast load transients. Emulating the supply
`current di/dt at the CPU VCORE pins requires at least
`10A/µs load transients. One easy method for generat-
`ing such an abusive load transient is to solder a MOS-
`FET, such as an MTP3055 or 12N05 directly across the
`scope-probe jack. Then drive its gate with a strong
`pulse generator at a low duty cycle (10%) to minimize
`heat stress in the MOSFET. Vary the high-level output
`voltage of the pulse generator to adjust the load current.
`To determine the load current, you might expect to
`insert a meter in the load path, but this method is pro-
`hibited here by the need for low resistance and induc-
`tance in the path of the dummy-load MOSFET. There
`are two easy alternative methods for determining how
`much load current a particular pulse-generator ampli-
`tude is causing. The first and best is to observe the
`inductor current with a calibrated AC current probe,
`such as a Tektronix AM503. In the buck topology, the
`load current is equal to the average value of the induc-
`tor current. The second method is to first put on a static
`dummy load and measure the battery current. Then,
`connect the MOSFET dummy load at 100% duty
`momentarily, and adjust the gate-drive signal until the
`battery current rises to the appropriate level (the MOS-
`FET load must be well heatsinked for this to work with-
`out causing smoke and flames).
`Efficiency Measurements and
`Effective Efficiency
`Testing the power conversion efficiency POUT/PIN fair-
`ly and accurately requires more careful instrumentation
`than might be expected. One common error is to use
`inaccurate DMMs. Another is to use only one DMM,
`and move it from one spot to another to measure the
`various input/output voltages and currents. This second
`error usually results in changing the exact conditions
`applied to the circuit due to series resistance in the
`ammeters. It’s best to get four 3-1/2 digit, or better,
`DMMs that have been recently calibrated, and monitor
`VBATT, VOUT, IBATT, and ILOAD simultaneously, using
`separate test leads directly connected to the input and
`output PC board terminals. Note that it’s inaccurate to
`test efficiency at the remote VOUT and ground termi-
`
`4
`
`_______________________________________________________________________________________
`
`Evaluates: MAX1711
`
`MICROCHIP TECHNOLOGY INC. EXHIBIT 1012
`Page 4 of 10
`
`

`

`MAX1711 Voltage Positioning Evaluation Kit
`
`Evaluates: MAX1711
`
`cy is the efficiency required of a nonvoltage-positioned
`circuit to equal the total dissipation of a voltage-posi-
`tioned circuit for a given CPU operating condition.
`Calculate effective efficiency as follows:
`• Start with the efficiency data for the positioned circuit
`(VIN, IIN, VOUT, IOUT).
`• Model the load resistance for each data point
`(RLOAD = VOUT / IOUT).
`• Calculate the output current that would exist for each
`RLOAD data point in a nonpositioned application (INP
`= VNP / RLOAD, where VNP = 1.6V in this example).
`• Effective efficiency = (VNP ✕ INP) / (VIN ✕ IIN) = cal-
`culated nonpositioned power output divided by the
`measured voltage-positioned power input.
`• Plot the efficiency data point at the current INP.
`The effective efficiency of the voltage-positioned circuit
`will be less than that of the nonpositioned circuit at light
`loads where the voltage-positioned output voltage is
`higher than the nonpositioned output voltage. It will be
`greater than that of the nonpositioned circuit at heavy
`loads where the voltage-positioned output voltage is
`lower than the nonpositioned output voltage.
`
`The choice of MOSFET has a large impact on efficiency
`performance. The International Rectifier MOSFETs
`used were of leading-edge performance for the 12A
`application at the time this kit was designed. However,
`the pace of MOSFET improvement is rapid, so the lat-
`est offerings should be evaluated.
`Once the actual efficiency data has been obtained,
`some work remains before an accurate assessment of
`a voltage-positioned circuit can be made. As dis-
`cussed in the Voltage Positioning section, a voltage-
`positioned power supply can dissipate additional
`power while reducing system power consumption. For
`this reason, we use the concept of effective efficiency,
`which allows the direct comparison of a positioned
`and nonpositioned circuit’s efficiency. Effective efficien-
`
`_______________________________________________________________________________________ 5
`
`nals, because doing this incorporates the parasitic
`resistance of the PC board output and ground buses in
`the measurement (a significant power loss).
`Remember to include the power consumed by the +5V
`bias supply when making efficiency calculations:
`×
`
`Efficiency
`
`=
`
`V
`OUT
`×
`I
`BATT
`
`
`
`
`
`I
`)
`
`V
`(
`BATT
`
`LOAD
`×
`+
`V I
`(5
`
`
`BIAS
`
`)
`
`
`
`MICROCHIP TECHNOLOGY INC. EXHIBIT 1012
`Page 5 of 10
`
`

`

`MAX1711 Voltage Positioning Evaluation Kit
`
`Jumper and Switch Settings
`
`Table 2. Jumper JU1 Functions
`(Shutdown Mode)
`SHUNT
`LOCATION
`
`SHDN PIN
`
`MAX1711
`OUTPUT
`
`Installed
`
`Not Installed
`
`Connected to
`VCC
`Connected to
`GND
`
`MAX1711 enabled
`
`Shutdown mode,
`VOUT = 0
`
`Table 4. Jumper JU6 Functions
`(Fixed/Adjustable Current-Limit Selection)
`SHUNT
`CURRENT-LIMIT
`LOCATION
`THRESHOLD
`Installed
`100mV
`
`ILIM PIN
`
`Connected to VCC
`Connected to GND via an
`external resistor divider,
`R6/R9. Refer to the Pin
`Description ILIM section in
`the MAX1711 data sheet for
`more information.
`
`Adjustable
`between 50mV
`and 200mV
`
`Not Installed
`
`Table 5. Jumpers JU9/JU10 Functions
`(FBS and FB Integrator Disable Selection)
`SHUNT LOCATION
`JU9
`JU10
`Installed
`Not Installed Connected to VCC
`Not Installed
`Installed
`Connected to the output of U2
`
`SKIP PIN
`
`Table 3. Jumpers JU3/JU4/JU5 Functions
`(Switching-Frequency Selection)
`SHUNT LOCATION
`FREQUENCY
`(kHz)
`JU3
`JU5
`JU4
`Not
`Not
`Installed
`Installed
`
`Installed
`
`Not
`Installed
`
`Installed
`
`Not
`Installed
`
`Not
`Installed
`
`Not
`Installed
`
`Installed
`
`TON PIN
`
`Connected
`to VCC
`Connected
`to REF
`
`Connected
`to GND
`
`200
`
`400
`
`550
`
`300
`
`Not
`Installed
`
`Not
`Installed
`
`Not
`Installed
`
`Floating
`
`IMPORTANT: Don’t change the operating frequency without
`first recalculating component values because the frequency
`has a significant effect on the peak current-limit level, MOSFET
`heating, preferred inductor value, PFM/PWM switchover point,
`output noise, efficiency, and other critical parameters.
`
`Table 6. Troubleshooting Guide
`
`SYMPTOM
`
`POSSIBLE PROBLEM
`
`SOLUTION
`
`Circuit won’t start when power is applied.
`
`Power-supply sequencing: +5V
`bias supply was applied first.
`
`Output overvoltage due to
`shorted high-side MOSFET.
`
`Press the RESET button.
`
`Replace the MOSFET.
`
`Circuit won’t start when RESET is pressed,
`+5V bias supply cycled.
`
`Output overvoltage due to load
`recovery overshoot.
`
`Reduce the inductor value, raise the switching
`frequency, or add more output capacitance.
`
`Overload condition.
`
`Remove the excessive load.
`
`Broken connection, bad MOSFET,
`or other catastrophic problem.
`
`On-time pulses are erratic or have
`unexpected changes in period.
`
`VBATT power source has poor
`impedance characteristic.
`
`Troubleshoot the power stage. Are the DH and DL
`gate-drive signals present? Is the 2V VREF pre-
`sent?
`
`Add a bulk electrolytic bypass capacitor across
`the benchtop power supply, or substitute a real
`battery.
`
`6
`
`_______________________________________________________________________________________
`
`Evaluates: MAX1711
`
`MICROCHIP TECHNOLOGY INC. EXHIBIT 1012
`Page 6 of 10
`
`

`

`MAX1711 Voltage Positioning Evaluation Kit
`
`Evaluates: MAX1711
`
`PGOOD
`
`REF
`
`1%
`1M
`R13
`
`100Ω
` R11
`
`100k
`R4
`
`VCC
`
`1%
`10k
`R14
`
`1000pF
`C18
`
`OPEN
`C19
`
`OPEN
`C17
`
`2.5V
`220µF
`C16
`
`6.3V
`10µF
`C8
`
`D3
`
`2.5V
`220µF
`C7
`
`2.5V
`220µF
`C6
`
`2.5V
`220µF
`C5
`
`VOUT
`
`SCOPE JACK
`J1
`
`CMPD2838
`D4
`
`VBIAS
`+5V
`
`D1
`
`0.005Ω
`R12
`
`1%
`
`0.47µH
`
`L1
`
`N3
`
`5 1 2
`
`6
`
`7
`
`8 4
`
`2
`
`1
`
`N1
`
`5
`6
`
`7
`
`3
`
`8
`
`4
`
`2
`
`N2
`
`15
`
`6
`
`7
`
`8 4
`
`0.1µF
`C9
`
`1µF
`C15
`
`CMPSH-3
`D2
`
`SHORT
`
`R7
`
`VDD
`
`OPEN
`C21
`
`25V
`10µF
`C20
`
`25V
`10µF
`C4
`
`25V
`10µF
`C3
`
`25V
`10µF
`C2
`
`25V
`10µF
`C1
`
`12
`
`11
`
`4
`
`3
`
`14
`
`13
`
`23
`
`24
`
`PGOOD
`
`GNDS
`
`FBS
`
`FB
`
`PGND
`
`DL
`
`LX
`
`DH
`
`22
`
`BST
`
`1
`
`V+
`
`15
`
`VDD
`
`VCC
`
`7
`
`SHDN
`
`2
`
`JU1
`
`20Ω
`R1
`
`VDD
`
`VCC
`
`0.22µF
`C11
`
`VCC
`
`1k
`R10
`
`SKIP
`
`1M
`R3
`
`SW2
`
`RESET
`
`PGOOD
`
`ILIM
`
`10
`
`AGND
`
`MAX1711
`
`U1
`
`ILIM
`
`TON
`
`REF
`
`CC
`
`D4
`
`D3
`
`D2
`
`5
`
`9
`
`8
`
`6
`
`16
`
`17
`
`18
`
`D1
`
`19
`
`D0
`
`SKIP
`
`20
`
`21
`
`550kHz
`JU5
`
`JU6
`
`200kHz
`JU3
`
`VCC
`
`FLOAT = 300kHz
`
`400kHz
`JU4
`
`0.22µF
`C12
`
`SW1E
`
`6
`
`5
`
`SHORT
`R8
`
`9
`
`8
`
`7
`
`470pF
`C14
`
`SW1D
`
`4
`
`SW1C
`
`3
`
`SW1B
`
`2
`
`SW1A
`
`10
`
`1
`
`2V
`REF
`
`D4
`
`D3
`
`D2
`
`D1
`
`D0
`
`SKIP
`
`SHDN
`
`GND
`
`VBATT
`
`7V TO 24V
`
`Figure 1. MAX1711 Voltage Positioning EV Kit Schematic
`
`_______________________________________________________________________________________ 7
`
`MICROCHIP TECHNOLOGY INC. EXHIBIT 1012
`Page 7 of 10
`
`

`

`MAX1711 Voltage Positioning Evaluation Kit
`
`SKIP
`
`(PC TRACE)
`SHORT
`JU10
`
`VCC
`
`JU9
`
`N5
`
`3
`
`2
`
`1
`
`NOT INSTALLED
`
`TC4S30F
`
`4
`
`0.1µF
`C13
`
`3
`
`U2
`
`5
`
`VCC
`
`1
`
`3
`
`2
`
`N4
`
`0.01µF
`C10
`
`1 2
`
`1%
`140k
`R9
`
`1%
`100k
`R6
`
`10k
`R2
`
`PRESENT
`AC
`
`PGOOD
`
`ILIM
`
`Evaluates: MAX1711
`
`Figure 1. MAX1711 Voltage Positioning EV Kit Schematic (continued)
`
`8
`
`_______________________________________________________________________________________
`
`MICROCHIP TECHNOLOGY INC. EXHIBIT 1012
`Page 8 of 10
`
`

`

`Evaluates: MAX1711
`
`MAX1711 Voltage Positioning Evaluation Kit
`
`1.0"
`
`1.0"
`
`Figure 2. MAX1711 Voltage Positioning EV Kit Component
`Placement Guide—Component Side
`
`Figure 3. MAX1711 Voltage Positioning EV Kit Component
`Placement Guide—Solder Side
`
`1.0"
`
`1.0"
`
`Figure 4. MAX1711 Voltage Positioning EV Kit PC Board
`Layout—Component Side
`
`Figure 5. MAX1711 Voltage Positioning EV Kit PC Board
`Layout—Internal GND Plane (Layer 2)
`
`_______________________________________________________________________________________ 9
`
`MICROCHIP TECHNOLOGY INC. EXHIBIT 1012
`Page 9 of 10
`
`

`

`MAX1711 Voltage Positioning Evaluation Kit
`
`1.0"
`
`1.0"
`
`Figure 6. MAX1711 Voltage Positioning EV Kit PC Board
`Layout—Internal GND Plane (Layer 3)
`
`Figure 7. MAX1711 Voltage Positioning EV Kit PC Board
`Layout—Solder Side
`
`Evaluates: MAX1711
`
`Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
`implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
`10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
`
`© 2000 Maxim Integrated Products
`
`Printed USA
`
`is a registered trademark of Maxim Integrated Products.
`
`MICROCHIP TECHNOLOGY INC. EXHIBIT 1012
`Page 10 of 10
`
`