HIGH OUTPUT CURRENT
CHARGE PUMP DOUBLER
October 20, 2000
SC1462
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC1462 is a versatile charge pump designed for
use in battery operated power supply applications over
the wide input range of 1.65 to 5.5 volts. A simple, low
quiescent current charge pump doubler can be imple-
mented without costly inductors or capacitors. Internal
MOSFETs and control circuitry eliminate the need for
costly board space and design time. The small 6 lead
SOT-23 package helps minimize board space.
The SC1462 charge pump can be used for applica-
tions that require up to 80mA of output current with V
IN
= 2.5V to 5.5V. Typical dropout voltage (2*Vin-Vout) is
shown below for several values of Vin.
T ypical Dropou t Voltage vs Iou t
@T a = 25 D eg. C .
0.9
0.8
Vin = 1.5V
Vin = 2.5V
Vin = 3.6V
Vin = 4.5V
Vin = 5.5V
FEATURES
•=
Input supply voltage range of 1.65V to 5.5V
•=
Small size - 6 pin SOT-23 package
•=
Typical efficiency of :
•=
•=
•=
•=
•=
•=
91% @ Vin = 2.5V, Iout = 45mA
94% @ Vin = 3.6V, Iout = 55mA
Short circuit and over-temperature protection
140µA typical input current @ no load
Shutdown current <1µA
Designed to work with ceramic or Tantalum
capacitors
Fixed frequency of 160kHz
All specifications rated over full temperature
range (-40°C to 85°C)
APPLICATIONS
•=
Cellular phones
•=
Handheld devices
Ou tpu t D ropou t Voltage (V)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
000E+0
ORDERING INFORMATION
DEVICE
(1)
PACKAGE
SOT-23-6
Temp. Range (T
A
)
-40°C to 85°C
SC1462ISKTR
20E-3
40E-3
60E-3
80E-3
100E-3
Note:
(1) Only available in tape and reel packaging. A reel
contains 3000 devices.
Iou t (A)
TYPICAL APPLICATION SCHEMATIC
1
© 2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
SEMTECH [ SEMTECH CORPORATION ]
