MAX619 Datasheet, PDF (1/7 Pages) Maxim Integrated Products – Regulated 5V Charge-Pump DC-DC Converter

19-0227; Rev 2; 5/96
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Regulated 5V Charge-Pump
DC-DC Converter
_______________General Description
The MAX619 step-up charge-pump DC-DC converter
delivers a regulated 5V ±4% output at 50mA over tem-
perature. The input voltage range is 2V to 3.6V (two
battery cells).
The complete MAX619 circuit fits into less than 0.1in² of
board space because it requires only four external
capacitors: two 0.22µF flying capacitors, and 10µF
capacitors at the input and output.
Low operating supply current (150µA max) and low
shutdown supply current (1µA max) make this device
ideal for small, portable, and battery-powered applica-
tions. When shut down, the load is disconnected from
the input.
The MAX619 is available in 8-pin DIP and SO packages.
________________________Applications
Two Battery Cells to 5V Conversion
Local 3V-to-5V Conversion
Portable Instruments & Handy-Terminals
Battery-Powered Microprocessor-Based Systems
5V Flash Memory Programmer
Minimum Component DC-DC Converters
Remote Data-Acquisition Systems
Compact 5V Op-Amp Supply
Regulated 5V Supply from Lithium Backup Battery
Switching Drive Voltage for MOSFETs in
Low-Voltage Systems
__________________Pin Configuration
____________________________Features
o Regulated 5V ±4% Charge Pump
o Output Current Guaranteed over Temperature
20mA (VIN ≥ 2V)
50mA (VIN ≥ 3V)
o 2V to 3.6V Input Range
o No Inductors; Very Low EMI Noise
o Ultra-Small Application Circuit (0.1in2)
o Uses Small, Inexpensive Capacitors
o 500kHz Internal Oscillator
o Logic-Controlled 1µA Max Shutdown
Supply Current
o Shutdown Disconnects Load from Input
o 8-Pin DIP and SO Packages
_______________Ordering Information
PART
MAX619CPA
MAX619CSA
MAX619C/D
MAX619EPA
MAX619ESA
MAX619MJA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
* Dice are specified at TA = +25 °C.
PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 CERDIP
__________Typical Operating Circuit
TOP VIEW
C1+ 1
IN 2
OUT 3
C2+ ₄
MAX619
DIP/SO
8 C1-
7 ^SHDN
6 ^GND
5 ^C2-
INPUT
2V to 3.6V
10µF
ON/OFF
0.22µF
IN
OUT
MAX619
SHDN
C1+
C2+
C1-
C2-
GND
OUTPUT
5V, 20mA
10µF
0.22µF
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