MAX1760 Evaluation MAX1760 evaluation kit) fully assembled tested

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MAX1760 Evaluation MAX1760 evaluation kit) fully assembled tested

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MAX1760 Evaluation
MAX1760 evaluation kit) fully assembled tested surface-mount circuit board that contains boost switching-regulator circuit. provides regulated +3.3V output 800mA current. input voltage range +0.7V +5.5V. However, output voltage will rise above regulation point input voltages exceeding 3.3V. one- two-cell battery input also used power kit. MAX1760 features internal N-channel MOSFET switch, synchronous rectifier, pin-selectable forced mode. MAX1760 demonstrates quiescent current power efficiency 96%, thus increasing battery life. Operation 1MHz allows tiny surface-mount components. +0.7V +5.5V Input Voltage +3.3V Output Voltage Internal Synchronous Rectifier Provides Efficiency Output Adjustable with External Resistors 800mA Output On-Chip N-Channel Switch Shutdown Current 1MHz Switching Frequency Fixed-Frequency Operation Surface-Mount Components Fully Assembled Tested
Features
Evaluates: MAX1760
Component List
DESIGNATION JU1, None None None None DESCRIPTION 33µF, 16V, low-ESR electrolytic Sanyo 16TPC33M 100µF, 6.3V, low-ESR electrolytic Sanyo 6TPC100M 1µF, 10V, ceramic (0805) Taiyo Yuden LMK212BJ105MG 0.68µF, 10V, ceramic (0805) Taiyo Yuden LMK212BJ684KG 0.22µF, 25V, ceramic (1206) Taiyo Yuden TMK316BJ224KF installed (0805) installed, Nihon EP10QY03 3.3µH, 1.4A inductor Coilcraft DO1606T-332 resistor (0805) installed (0805) Maxim MAX1760EUB (10-pin µMAX) 3-pin headers Shunts (JU1, JU2) MAX1760 board MAX1760 data sheet MAX1760 data sheet SUPPLIER Coilcraft Nihon Sanyo Taiyo Yuden PART MAX1760EVKIT
Ordering Information
TEMP. RANGE +70°C PACKAGE µMAX
Component Suppliers
PHONE 847-639-6400 661-867-2555 619-661-6835 408-573-4150 847-639-1469 661-867-2698 619-661-1055 408-573-4159
Note: Please indicate that using MAX1760 when contacting these component suppliers.
Quick Start
MAX1760 fully assembled tested. Follow these steps verify board operation +3.3V output. turn power supply until connections completed. Connect +1.1V +3.2V power supply pad. Connect supply ground pad. Connect voltmeter VOUT pad. Verify that jumper (ON) shunt across pins jumper (CLK/SEL) shunt across pins Turn power supply verify that main output +3.3V.
Maxim Integrated Products
free samples latest literature, visit www.maxim-ic.com phone 1-800-998-8800. small orders, phone 1-800-835-8769.
MAX1760 Evaluation Evaluates: MAX1760
Table Jumper Functions
SHUNT LOCATION Connected VOUT Connected MAX1760 OUTPUT Shutdown mode, VOUT VDIODE MAX1760 enabled, VOUT +3.3V
Table Jumper Functions
SHUNT LOCATION CLK/SEL OPERATING MODE Forced mode: operation loads Normal mode: light load medium heavy load mode synchronized external 500kHz 1200kHz range clock
Connected VOUT
Connected
Detailed Description
MAX1760 contains boost switching-regulator circuit that provides +3.3V output. circuit requires +0.7V +3.2V input voltage maintain regulation. output supplies 800mA configured. output voltage also adjusted from +2.5V +5.5V with external resistors. MAX1760 permits jumper-selectable operational modes: normal mode, forced mode, forced mode with internal oscillator synchronized external clock.
None
Clock connected CLK/SEL
Evaluating Other Output Voltages
output +3.3V grounding feedback (FB). generate output voltages other than +3.3V (+2.5V +5.5V), open board trace shorting select external voltage-divider resistors (R1, R2). Refer Setting Output Voltage section MAX1760 data sheet instructions selecting maintain regulated output, input voltage range +0.7V VOUT maintain regulated output.
Jumper Selection
board jumpers provide user with various operating configurations. Shutdown mode CLK/ mode configurable jumpers. Shutdown Mode MAX1760 features shutdown mode that reduces IC's quiescent current (typ), preserving battery life. 3-pin jumper, JU1, selects shutdown mode circuit. Table lists selectable jumper options. CLK/SEL Operating Mode Jumper controls CLK/SEL operating mode. Options include low-noise forced mode, normal mode, external clock source drive CLK/SEL pin. external clock source must operate 500kHz 1200kHz range. Table lists CLK/SEL jumper options.
Evaluating Other Current Limits
inductor current limit from 625mA 1250mA. factory-configured 1250mA. current limit 625mA, open board trace shorting insert resistors Refer Setting Switch Current Soft Start section MAX1760 data sheet select other values.
Enabling Soft-Start
MAX1760 soft-start feature will limit inrush current during startup. Installing capacitor activates this feature. Refer Setting Switch Current Soft-Start section MAX1760 data sheet instructions selecting values.
Evaluating Lower Startup Input Voltages
MAX1760 operate from supply voltages down +0.7V. Install Schottky diode, ensure startup when below +1.1V. Refer Output Diode section MAX1760 data sheet instructions selecting needed input voltages above +1.1V.
Figure MAX1760 Schematic
3.3µH
OPEN
+1.1V VOUT
VOUT +3.3V
33µF 100µF 6.3V
VOUT
VOUT
MAX1760
CLK/SEL
CLK/SEL POUT
0.68µF OPEN
0.22µF
ISET PGND
SHORT OPEN OPEN
Evaluates: MAX1760
SHORT TRACE)
MAX1760 Evaluation
MAX1760 Evaluation Evaluates: MAX1760
1.0"
1.0"
Figure MAX1760 Component Placement Guide- Silkscreen
Figure MAX1760 Component Placement Guide- Bottom Silkscreen
1.0"
1.0"
Figure MAX1760 Board Layout-Component Side
Figure MAX1760 Board Layout-Solder Side
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
_Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 2000 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

MAX1760 Evaluation MAX1760 evaluation kit) fully assembled tested

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