19-0227; Rev 2; 5/96
NUAL
KIT MA
ATION
HEET
EVALU
DATA S
LOWS
FOL
Regulated 5V Charge-Pump
DC-DC Converter
____________________________Features
o
Regulated 5V ±4% Charge Pump
o
Output Current Guaranteed over Temperature
20mA (V
IN
≥
2V)
50mA (V
IN
≥
3V)
o
2V to 3.6V Input Range
o
No Inductors; Very Low EMI Noise
o
Ultra-Small Application Circuit (0.1in
2
)
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
_______________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 0.1in
2
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.
MAX619
________________________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
_______________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
PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 CERDIP
* Dice are specified at T
A
= +25 °C.
__________________Pin Configuration
TOP VIEW
__________Typical Operating Circuit
INPUT
2V to 3.6V
10µF
C1+
1
IN
2
OUT
3
C2+
4
8
C1-
7
SHDN
ON/OFF
IN
OUT
10µF
OUTPUT
5V, 20mA
MAX619
SHDN
C1+
0.22µF
C1-
GND
C2-
C2+
0.22µF
MAX619
6
GND
5
C2-
DIP/SO
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
