
SC1460
1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
5mA CAPLESS
TM
CHARGE PUMP
PRELIMINARY - July 6, 1999
1
BLOCK DIAGRAM
PIN CONFIGURATION
3 Lead SOT-23
DESCRIPTION
The SC1460 is a versatile charge pump designed for
use in battery operated power supply applications re-
quiring up to 5mA. It enables a simple low current
boost circuit to be implemented without the costly in-
ductors or capacitors associated with regular switching
circuits. Features include internal MOSFETs, control
circuitry and charge pump capacitor, requiring only two
external capacitors for a total solution. With a very
high operating frequency (8MHz free running at 2.5V in
typically), the SC1460 does not require large input or
output capacitors, and therefore uses very little board
space. Two versions of the SC1460 are available: the
-3.3 produces a regulated 3.3V output from 2.5V in,
and the -5.0 produces a regulated 5V output from 3.3V
in. It is supplied in the popular 3 lead, SOT-23 pack-
age.
FEATURES
Small size - SOT-23 package
4% voltage accuracy
Typical 100uA quiescent current
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
ORDERING INFORMATION
DEVICE
(1)(2)
PACKAGE
SC1460CSK-X.X
SOT-23
Notes:
(1) Where X.X denotes voltage options. Available volt-
ages are: 3.3V and 5.0V.
(2) Add suffix ‘TR’ for tape and reel.
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Maximum
Units
Supply Voltage
VIN
-0.3 to + 4
V
Output Voltage
VO
-0.3 to +6.0
V
Thermal Resistance
Junction to Ambient
θ
JA
410
°C/W
Operating Temperature
T
A
0 to +70
°C
Temperature Range
T
J
0 to 125
°C
Storage Temperature
T
STG
-65 to +150
°C
Lead Temperature
(Soldering) 10 seconds
T
L
300
°C
APPLICATIONS
Handheld Power Supplies
PDA Power Supplies
Notebook Power Supplies
Peripheral Card Supplies
Industrial Power Supplies
High Density DC/DC Conversion
(Top View)