MAX1682 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – Switched-Capacitor Voltage Doublers

19-1305; Rev 1; 8/98
Switched-Capacitor Voltage Doublers
General Description
The ultra-small MAX1682/MAX1683 monolithic, CMOS
charge-pump voltage doublers accept input voltages
ranging from +2.0V to +5.5V. Their high voltage-con-
version efficiency (over 98%) and low operating current
(110µA for MAX1682) make these devices ideal for
both battery-powered and board-level voltage-doubler
applications.
Oscillator control circuitry and four power MOSFET
switches are included on-chip. The MAX1682 operates
at 12kHz and the MAX1683 operates at 35kHz. A typi-
cal application includes generating a 6V supply to
power an LCD display in a hand-held PDA. Both parts
are available in a 5-pin SOT23 package and can deliver
30mA with a typical voltage drop of 600mV.
____________________________Features
o 5-Pin SOT23 Package
o +2.0V to +5.5V Input Voltage Range
o 98% Voltage-Conversion Efficiency
o 110µA Quiescent Current (MAX1682)
o Requires Only Two Capacitors
o Up to 45mA Output Current
________________________Applications
Small LCD Panels
Cell Phones
Handy-Terminals
PDAs
Typical Operating Circuit
Ordering Information
PART
TEMP.
RANGE
PIN-
SOT
PACKAGE TOP MARK
MAX1682C/D
0°C to +70°C
MAX1682EUK-T -40°C to +85°C
MAX1683C/D
0°C to +70°C
MAX1683EUK-T -40°C to +85°C
Dice*
5 SOT23-5
Dice*
5 SOT23-5
—
ACLL
—
ACCM
Note: These parts are available in tape-and-reel only. Minimum
order quantity is 2500 pieces.
*Dice are tested at T_A = +25°C.
5
C1+
IN
4 V_IN
INPUT
SUPPLY
VOLTAGE
C1
3
C1-
MAX1682
MAX1683
1
GND
OUT ²
OUTPUT
VOLTAGE
2 x V_IN
C2
VOLTAGE DOUBLER
Pin Configuration
TOP VIEW
GND 1
5 C1+
MAX1682
OUT 2 _MAX1683
C1- 3
4 IN
SOT23-5
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