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PDF SC1460CSK-3.3 Datasheet ( Hoja de datos )

Número de pieza SC1460CSK-3.3
Descripción 5mA CAPLESSTM CHARGE PUMP
Fabricantes Semtech Corporation 
Logotipo Semtech Corporation Logotipo



Total 6 Páginas
		
SC1460CSK-3.3 Hoja de datos, Descripción, Manual
5mA CAPLESSTM 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
Small size - SOT-23 package
4% voltage accuracy
Typical 100uA quiescent current
APPLICATIONS
Handheld Power Supplies
PDA Power Supplies
Notebook Power Supplies
Peripheral Card Supplies
Industrial Power Supplies
High Density DC/DC Conversion
ORDERING INFORMATION
BLOCK DIAGRAM
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.
PIN CONFIGURATION
(Top View)
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
θJA
410 °C/W
Operating Temperature
Temperature Range
Storage Temperature
Lead Temperature
(Soldering) 10 seconds
TA
TJ
TSTG
TL
0 to +70
0 to 125
-65 to +150
300
°C
°C
°C
°C
3 Lead SOT-23
© 1999 SEMTECH CORP.
1
652 MITCHELL ROAD NEWBURY PARK CA 91320

1 page

SC1460CSK-3.3 pdf
5mA CAPLESSTM CHARGE PUMP
SC1460
PRELIMINARY - July 6, 1999
Typical Eff. vs. Ta @ Io = 4 mA
57
56
55
54
Vin = 2.25 V
Vin = 2.50 V
Vin = 3.30 V
Vin = 3.60 V
53
0 10 20 30 40 50 60 70 80
Ta (Deg. C.)
Typical Vo vs. Ta @ Vin = 2.50V
3.5
3.4
3.3
3.2
3.1
3
2.9
2.8
Io = 0mA
2.7 Io = 4mA
Io = 5mA
2.6
Io = 6mA
2.5
0
10 20 30 40 50 60 70
Ta (Deg. C.)
Typical Vo ripple vs. Cout @ Vin = 2.50V
70.0E-3
60.0E-3
50.0E-3
Iout = 4mA
40.0E-3
30.0E-3
20.0E-3
10.0E-3
000.0E+0
22.0E-9
47.0E-9
56.0E-9
68.0E-9
Cout (F)
82.0E-9
180.0E-9
220.0E-9
Vo ripple
Typical Iin vs. Ta @ Io = 0 mA
0.19
0.17
0.15
0.13
0.11
0.09
Vin = 2.25 V
0.07 Vin = 2.50 V
Vin = 3.30 V
Vin = 3.60 V
0.05
0
10 20 30 40 50 60 70
Ta (Deg. C.)
© 1999 SEMTECH CORP.
5
652 MITCHELL ROAD NEWBURY PARK CA 91320

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