MAX769 Evaluation MAX769 evaluation kit) provides platform evalua

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19-4771; 10/98
MAX769 Evaluation
MAX769 evaluation kit) provides platform evaluating features MAX769. MAX769 converts 2-cell 3-cell, 1.5V 5.5V battery voltage four separate output voltages. main output voltage digitally controlled from 1.8V 4.9V 100mV steps 3-wire SPIserial interface. provides 80mA. other outputs (REG1, REG2, REG3) low-noise linear-regulator outputs. MAX769 contains numerous other features two-way paging other low-power wireless designs. Consult MAX769 data sheet details. MAX769 fully assembled tested surface-mount circuit board. MAX847 similar MAX769 except that contains boost DC-DC converter (for 1-cell inputs) rather than buck-boost converter (for 2-cell 3-cell inputs). evaluate MAX847, please order MAX847EVKIT.
Features
1.5V 5.5V (buck-boost) Input Voltage 1.8V 4.9V Digitally Adjustable Output Voltage 80mA Total Output Current Three Low-Noise Voltage Regulators Charger Small NiCd, NiMH, Lithium Battery, Storage Capacitor 270kHz Switching Frequency 15µA Idle ModeCurrent Digitally Controlled Switches Vibrators, Beepers, Other Low-Power Wireless Designs Reset Low-Battery Outputs Surface-Mount Components Fully Assembled Tested
Evaluates: MAX769
Ordering Information
PART MAX769EVKIT TEMP. RANGE +70°C PACKAGE QSOP
Component List
DESIGNATION C10, C12, C13, C15, R11, R13, R18, R10, R17, R19, R20, DESCRIPTION 47µF, low-ESR tantalum caps Sprague 593D476X0016E2W TPSD476M016R0150 0.1µF ceramic capacitors 22nF ceramic capacitor ceramic capacitors 10µF, tantalum capacitors Sprague 595D106X0010A2T 1000pF ceramic capacitor 0.5A, Schottky diode (optional) Motorola MBR0520L 15k, resistor resistors SW1-SW4 100k, resistors LED1 None None JU1-JU10 JU11 JU12 DESIGNATION R14, DESCRIPTION 100k, resistor 390k, resistor resistor 620k, resistors 10k, resistor 68µH inductor Sumida CD54-680 MAX769EEI 2-pin headers 3-pin header 4-pin header 6-pin header 25-pin, female, right-angle connector Slide switches Mouser 10SP001 Green light-emitting diode MAX847/MAX769 board MAX769 data sheet
Idle Mode trademark Maxim Integrated Products. trademark Motorola Corp.
Maxim Integrated Products
free samples latest literature: http://www.maxim-ic.com, phone 1-800-998-8800. small orders, phone 1-800-835-8769.
MAX769 Evaluation Evaluates: MAX769
Component Suppliers
SUPPLIER CoilCraft Coiltronics Dale-Vishay Motorola Sprague Sumida Vishay/Vitramon PHONE 803-946-0690 708-639-6400 561-241-7876 402-564-3131 602-303-5454 603-224-1961 708-956-0666 203-268-6261 803-626-3123 708-639-1469 561-241-9339 402-563-6418 602-994-6430 603-224-1430 708-956-0702 203-452-5670
Manual Programming
MAX769 designed controlled serial interface; however, slide-switches SW1-SW4 LED1 provided assist "bench-top" evaluation (Table MAX769 data sheet descriptions programmable features more information serial programming. manually program data into device, start with SW1, SW2, high. Then sequence through following steps: (CS) low. first desired data input with SW2. Toggle serial clock down with SW1. Data loaded rising edge. Repeat steps each next seven input data bits (for total eight bits). high.
Note: Please indicate that using MAX769 when contacting these component suppliers.
Quick Start
MAX769 fully assembled tested. Follow these steps verify board operation. turn power supply until connections completed. Check positions jumpers JU1-JU12. Table MAX769 data sheet details. Jumper connections MAX847 MAX769 same. Check positions switches SW1-SW4. SW1-SW3 should high (closest edge evaluation board). When testing MAX769, used should disconnected leaving JU12-1 open. Connect supply voltage BATT pad. power-supply ground connects pad. Connect voltmeter load, any, pad. Note that MAX769 designed start low-power (COAST) mode-it cannot supply full load until mode after start-up serial interface). Turn input power supply verify that output voltage 3.0V. This MAX769's starting voltage. Other voltages then programmed serial interface (see MAX769 data sheet).
Connectors
MAX769 evaluation board contains provisions types connectors serial-interface connections. 6-pin single in-line header (J1) that contains only serial-interface connections. other DB-25 footprint (J2) that serial connections along with other connections. Pin/pad connections outlined Tables
Table Switch Functions
SWITCH/ FUNCTION COMMENTS
Manual Serial Clock Input (SCL) Logic-high level with switch pushed toward board. Logic-low level with switch pushed toward switch label "SW1," "SW2," etc.
Manual Serial Data Input (SDI) Manual Chip-Select Input (CS) This switch does function with MAX769. RUN/COAST selection MAX847 only. Visual Data Output (SDO)
LED1
logic-high output.
MAX769 Evaluation Evaluates: MAX769
Table Jumper Selection
JUMPER NUMBER MAX769 DEFAULT POSITION COMMENTS should inserted external synchronous clock used. external synchronous clock applied, then should removed. With inserted, battery input (LBI, LBO) trip With removed, 0.6V. should removed when making no-load operating current measurements prevent from adding measured current. With inserted, reset input (RSIN, RSO) trip 1.6V. With removed, RSIN 0.6V. should removed when making no-load operating current measurements prevent from adding measured current. connects 100k pull-up resistor (R17) from REG1 open-drain output. removed used different pull-up resistor used. connects 100k pull-up resistor (R10) from REG1 open-drain output. removed used different pull-up resistor used. connects (LED1) serial data output (SDO). LED1 gives visual indication serial output data when manually programming with SW1, SW2, SW3. should removed when using µP-controlled interface, since will visible digital clock speeds. should also removed when making operating quiescent-current measurements. connects serial clock input (SCL) (used clock-in serial programming data). Insert when programming manually with SW1, SW2, SW3. Remove when using digital serial interface connector connects serial data input (SDI) (used serial programming data). Insert when programming manually with SW1, SW2, SW3. Remove when using digital serial interface connector connects chip-select input (CS) (used activate serial interface). Insert when programming manually with SW1, SW2, SW3. Remove when using digital serial interface connector Remove JU10 when MAX769 used. JU10 connects input (MAX847 only). JU11 three pins connect REG2 input (REG2IN) either REG1 (jumper J11-1 J112) (jumper J11-2 J11-3). JU12 four pins. When MAX769 used, connect only jumper JU12-2 JU12-3, leaving JU12-1 JU12-4 open. When MAX847 inserted, connect jumper JU12-1 JU12-2 jumper JU12-3 JU12-4.
JU10 JU11
JU11-1, JU11-2 JU12-2, JU12-3, JU12-1 (N.C.), JU12-4 (N.C.)
JU12
MAX769 Evaluation Evaluates: MAX769
Table Connector Pinouts (6-Pin Header)
J1-1 J1-2 J1-3 J1-4 J1-5 J1-6 FUNCTION REG1 Output Voltage
Table Connector Pinouts (DB-25)
J2-PIN J2-1 J2-2 J2-3 J2-4 J2-5 J2-6 J2-7 J2-8 J2-9 J2-10 J2-11 J2-12 J2-13 J2-14 J2-15 J2-16 J2-17 J2-18 J2-19 J2-20 J2-21 J2-22 J2-23 J2-24 J2-25 FUNCTION BATT REG1 REG2 REG3 NICD N.C. (MAX769 only, MAX847) N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C.
N.C. Connection
JU12-4 JU12-3 JU12-2 JU12-1 REG1 0.1µF BATT PGND SYNC 0.1µF 100k REG1 LED1 NICD RSIN R2IN DR2IN REG2 DRGND AGND REG3 REG3 10µF REG2 0.1µF JU11 REG1 NICD REG1 10µF 620k 100k 100k J2-17 N.C. N.C. N.C. N.C. N.C. N.C. J2-9 J2-10 N.C. N.C. N.C. N.C. N.C. J2-24 J2-25 J2-22 J2-23 J2-20 J2-21 J2-18 J2-19 J2-11 J2-12 J2-13 J2-14 J2-15 J2-16 620k 390k 47µF 100k 0.1µF MBR0520L 100k 68µH 100k 0.1µF 47µF BATT BATT JU10
0.1µF
REG1
REG1
OPTIONAL
J1-1 J1-2 J1-3 J1-4 J1-5 J1-6
Figure MAX769 Schematic
100k
100k
MAX769
SYNC
FILT
22nF
REG1 0.1µF
REG1
BATT
REG1
REG1
DR2IN
J2-1 J2-2
BATT REG1
J2-3 J2-4
REG2 REG3
Evaluates: MAX769
J2-5 J2-6
NICD
J2-7 J2-8
MAX769 Evaluation
MAX769 Evaluation Evaluates: MAX769
1.0"
Figure MAX769 Component Placement Guide-Component Side
MAX769 Evaluation Evaluates: MAX769
1.0"
Figure MAX769 Board Layout-Component Side
MAX769 Evaluation Evaluates: MAX769
1.0"
Figure MAX769 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 1998 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

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