Rainbow Electronics MAX619 - Manual

_______________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 0.22
µ
F flying capacitors, and 10
µ
F
capacitors at the input and output.
Low operating supply current (150
µ
A max) and low
shutdown supply current (1
µ
A 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
____________________________Features
♦ Regulated 5V ±4% Charge Pump
♦ Output Current Guaranteed over Temperature
20mA (V IN
≥
2V)
50mA (V IN
≥
3V)
♦ 2V to 3.6V Input Range
♦ No Inductors; Very Low EMI Noise
♦ Ultra-Small Application Circuit (0.1in 2 )
♦ Uses Small, Inexpensive Capacitors
♦ 500kHz Internal Oscillator
♦ Logic-Controlled 1 µ A Max Shutdown
Supply Current
♦ Shutdown Disconnects Load from Input
♦ 8-Pin DIP and SO Packages
_______________Ordering Information
* Dice are specified at T A = +25 °C.
MAX619
Regulated 5V Charge-Pump
DC-DC Converter
________________________________________________________________ Maxim Integrated Products 1
1
2
3
4
8
7
6
5
MAX619
DIP/SO
C1+
IN
OUT
C2+
C1-
SHDN
GND
C2-
TOP VIEW
__________________Pin Configuration
MAX619
OUT
C2+
C2-
IN
SHDN
C1+
C1-
INPUT
2V to 3.6V
ON/OFF
0.22 µ F
OUTPUT
5V, 20mA
10 µ F 10 µ F
0.22 µ F
GND
__________Typical Operating Circuit
19-0227; Rev 2; 5/96
EVALUATION KIT MANUAL
FOLLOWS DATA SHEET
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
PART TEMP. RANGE PIN-PACKAGE
MAX619CPA 0°C to +70°C 8 Plastic DIP
MAX619CSA 0°C to +70°C 8 SO
MAX619C/D 0°C to +70°C Dice*
MAX619EPA -40°C to +85°C 8 Plastic DIP
MAX619ESA -40°C to +85°C 8 SO
MAX619MJA -55°C to +125°C 8 CERDIP