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MAX1643

Maxim
Part Number MAX1643
Manufacturer Maxim
Description Step-Up DC-DC Converters
Published May 5, 2014
Detailed Description 19-1183; Rev 0; 6/97 ANUAL N KIT M EET IO T A U EVAL TA SH WS DA FOLLO High-Efficiency, Step-Up DC-DC Converters for 1...
Datasheet PDF File MAX1643 PDF File

MAX1643
MAX1643

Overview
19-1183; Rev 0; 6/97 ANUAL N KIT M EET IO T A U EVAL TA SH WS DA FOLLO High-Efficiency, Step-Up DC-DC Converters for 1V Inputs ____________________________Features o Built-In Synchronous Rectifier o 0.
88V Guaranteed Start-Up o Ultra-Small µMAX Package: 1.
1mm High o 83% Efficiency o 4µA Quiescent Supply Current into BATT Pin o 2µA Logic-Controlled Shutdown (MAX1642) o Two Undervoltage Detectors (MAX1643) o 2V to 5.
2V Output Range o 20mA Output Current at 1.
2V Input o Reverse Battery Protection _______________General Description The MAX1642/MAX1643 are high-efficiency, low-voltage, step-up DC-DC converters intended for devices powered by a single alkaline cell.
They feature low quiescent supply currents and are supplied in the ultra-small µMAX package, which is only 1.
1mm high.
The guaranteed start-up voltage is 0.
88V.
Each device consists of an internal 1 Ω , N-channel MOSFET power switch; a built-in synchronous rectifier that acts as the catch diode; an oscillator; a reference; and pulse-frequency-modulation (PFM) control circuitry.
Both devices feature an independent undervoltage comparator (PFI/PFO).
The MAX1642 also includes a 2µA logic-controlled shutdown mode.
The MAX1643 offers a dedicated low-battery detector (BATTLO) in lieu of shutdown.
The output voltage for each device is preset to 3.
3V ±4%, or can be adjusted from +2V to +5.
2V using only two resistors.
MAX1642/MAX1643 ______________Ordering Information PART MAX1642C/D MAX1642EUA MAX1643C/D MAX1643EUA TEMP.
RANGE 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C PIN-PACKAGE Dice* 8 µMAX Dice* 8 µMAX ________________________Applications Pagers Remote Controls Pointing Devices Personal Medical Monitors Single-Cell Battery-Powered Devices *Dice are tested at TA = +25°C.
Note: To order these devices shipped in tape and reel, add a -T to the part number.
_________________Pin Configurations TOP VIEW BATT 1 8 OUT LX GND FB __________Typical Operating Circuit PFI 2 PFO 3 SHDN 4 MAX1642 7 6 5 IN...


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