5mA CAPLESS
TM
CHARGE PUMP
SC1460
PRELIMINARY - July 6, 1999
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
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
鈥?/div>
Small size - SOT-23 package
鈥?/div>
4% voltage accuracy
鈥?/div>
Typical 100uA quiescent current
APPLICATIONS
鈥?/div>
Handheld Power Supplies
鈥?/div>
PDA Power Supplies
鈥?/div>
Notebook Power Supplies
鈥?/div>
Peripheral Card Supplies
鈥?/div>
Industrial Power Supplies
鈥?/div>
High Density DC/DC Conversion
ORDERING INFORMATION
BLOCK DIAGRAM
DEVICE
(1)(2)
PACKAGE
SOT-23
SC1460CSK-X.X
Notes:
(1) Where X.X denotes voltage options. Available volt-
ages are: 3.3V and 5.0V.
(2) Add suffix 鈥楾R鈥?for tape and reel.
ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Voltage
Output Voltage
Thermal Resistance
Junction to Ambient
Operating Temperature
Symbol
VIN
VO
胃
JA
T
A
T
J
T
STG
T
L
Maximum
-0.3 to + 4
-0.3 to +6.0
410
0 to +70
0 to 125
-65 to +150
300
Units
V
V
擄C/W
擄C
擄C
擄C
擄C
PIN CONFIGURATION
(Top View)
Temperature Range
Storage Temperature
Lead Temperature
(Soldering) 10 seconds
3 Lead SOT-23
1
漏 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
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