SC1460CSK-5.0T [SEMTECH]
Switched Capacitor Regulator, 8000kHz Switching Freq-Max, PDSO3, SOT-23, 3 PIN;
| 型号： | SC1460CSK-5.0T |
| 厂家： | 
SEMTECH CORPORATION |
| 描述： | Switched Capacitor Regulator, 8000kHz Switching Freq-Max, PDSO3, SOT-23, 3 PIN 光电二极管 |
| 文件： | 总6页 (文件大小：74K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
5mA CAPLESSTM CHARGE PUMP
SC1460-5
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
PRELIMINARY - October 28, 1999
DESCRIPTION
FEATURES
The SC1460-5 is a versatile charge pump designed for
use in battery operated power supply applications re-
quiring up to 5mA. Output voltage is referenced to a
fixed ratio of VIN (VO = 1.515 X VIN). It enables a simple
low current boost circuit to be implemented without the
costly inductors or capacitors associated with regular
switching circuits. Features include internal MOS-
FETs, control circuitry and charge pump capacitor, re-
quiring only two external capacitors for a total solution.
With a very high operating frequency (8MHz free run-
ning at 3.3VIN typically), the SC1460-5 does not require
large input or output capacitors, and therefore uses
very little board space. Two versions are available: the
SC1460-5 produces a 5V output from 3.3V in, and the
SC1460-3.3 produces a 3.3V output from 2.5V in. Both
are supplied in the popular 3 lead, SOT-23 package.
•
•
•
•
Small size - SOT-23 package
4% voltage accuracy
Typical 100uA quiescent current
VOUT referenced within ± 4% of 1.515 X VIN
APPLICATIONS
•
•
•
•
•
•
Handheld Power Supplies
PDA Power Supplies
Notebook Power Supplies
Peripheral Card Supplies
Industrial Power Supplies
High Density DC/DC Conversion
ORDERING INFORMATION
DEVICE(1)
PACKAGE
BLOCK DIAGRAM
SC1460CSK-5.0
SOT-23-3L
Notes:
(1) Add suffix ‘TR’ for tape and reel.
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol Maximum Units
Supply Voltage
Output Voltage
VIN
VO
-0.3 to + 4
-0.3 to +6.0
410
V
V
Thermal Resistance
Junction to Ambient
°C/W
θJA
Operating Temperature
Temperature Range
Storage Temperature
TA
TJ
0 to +70
0 to 125
-65 to +150
300
°C
°C
°C
°C
PIN CONFIGURATION
TSTG
TL
(Top View)
Lead Temperature
(Soldering) 10 seconds
3 Lead SOT-23
1
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
5mA CAPLESSTM CHARGE PUMP
SC1460-5
PRELIMINARY - October 28, 1999
ELECTRICAL CHARACTERISTICS
Unless specified: VIN = 3.3V, 0 ≤ IO ≤ 4mA, CIN = 0.22uF, COUT = 47nF, TA = 25°C. Values in bold apply over full operating temperature range
Parameter
Symbol
VIN
Conditions
MIN
TYP
MAX Units
Input Supply Voltage
Input Supply Current
Output Voltage
Output Voltage
2.25
3.63
150
4
V
µA
%
V
IIN
IO = 0mA VIN = 3.3 V
VIN = 3.3V
100
1.515 X VIN
5.0
VO
-4
VO
VIN = 3.3V
4.80
5.20
Output Ripple (pk-pk)
VR
IO = 4mA, COUT = 47nF
50
mV
Output Current
Efficiency
IO
η
4
5
mA
%
IO = 4mA
50
56
Oscillator Frequency
OSC
tON
VIN = 3.3V
8
MHz
µs
Time to Regulation at
Turn-On
Power Up with IO = 4mA
100
APPLICATION CIRCUIT
U1 SC1460
2
1
VO
VIN
VIN
VO
GND
Cin
0.22uF
Cout
47nF
3
2
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
5mA CAPLESSTM CHARGE PUMP
SC1460-5
PRELIMINARY - October 28, 1999
Typical Eff vs Vo @25 Deg. C.
Typical Vo vs Io @25 Deg. C.
6.000
5.500
5.000
4.500
4.000
3.500
3.000
2.500
2.000
65.00%
60.00%
55.00%
50.00%
4ma
Vin = 3.63V
Vin = 3.30V
Vin = 2.50V
Vin = 2.25V
5ma
6ma
45.00%
40.00%
0
1
2
3
4
5
6
2.00
2.50
3.00
3.50
4.00
4.50
5.00
5.50
6.00
Io(mA)
Vo (V)
Typical Iin vs Vin @25 Deg. C.
Typical Eff vs Vin @25 Deg. C.
16
14
12
10
8
65.00%
60.00%
55.00%
50.00%
45.00%
40.00%
6ma
5ma
4ma
0 ma
6
4ma
5ma
6ma
4
2
0
2.00
2.50
3.00
Vin (V)
3.50
2.00 2.20 2.40 2.60 2.80 3.00 3.20 3.40 3.60 3.80
Vin (V)
Typical Iin vs Io @25 Deg. C.
Typical Eff vs Io @25 Deg. C.
65.00%
60.00%
55.00%
50.00%
45.00%
40.00%
16.00
14.00
12.00
10.00
8.00
Vin = 3.63V
Vin = 3.30V
Vin = 2.50V
Vin = 2.25V
6.00
Vin = 3.63V
Vin = 3.30V
Vin = 2.50V
Vin = 2.25V
4.00
2.00
0.00
4
4.5
5
5.5
6
0
1
2
3
4
5
6
Io(mA)
Io(mA)
3
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
5mA CAPLESSTM CHARGE PUMP
SC1460-5
PRELIMINARY - October 28, 1999
Typical Vo vs Vin @25 Deg. C.
6.000
5.500
5.000
4.500
4.000
0 ma
3.500
3.000
2.500
2.000
4ma
5ma
6ma
2.00 2.20 2.40 2.60 2.80 3.00 3.20 3.40 3.60 3.80
Vin (V)
4
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
5mA CAPLESSTM CHARGE PUMP
SC1460-5
PRELIMINARY - October 28, 1999
Typical Eff vs Ta @Io = 4ma
Typical Voripple vs Cout @Vin =3.30V
60.0E-3
55.0E-3
50.0E-3
45.0E-3
40.0E-3
35.0E-3
30.0E-3
25.0E-3
20.0E-3
15.0E-3
10.0E-3
62.00%
60.00%
58.00%
4ma
56.00%
Vin = 3.63V
54.00%
Vin = 3.30V
Vin = 2.50V
52.00%
Vin = 2.25V
50.00%
0
10
20
30
40
50
60
70
80
22.0E-9 47.0E-9 56.0E-9 68.0E-9 82.0E-9 180.0E-9 220.0E-9
Cout (F)
Ta(Deg.C.)
Typical Vo vs Ta @Vin = 3.30V
Vo ripple
5.200
5.000
4.800
4.600
4.400
4.200
4.000
0 ma
4ma
5ma
6ma
0
10
20
30
40
50
60
70
80
Ta(Deg.C.)
Typical Iin vs Ta @Io = 0mA
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
Vin = 3.63V
Vin = 3.30V
Vin = 2.50V
Vin = 2.25V
0
10
20
30
40
50
60
70
80
Ta(Deg.C.)
5
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
5mA CAPLESSTM CHARGE PUMP
SC1460-5
PRELIMINARY - October 28, 1999
OUTLINE DRAWING SOT-23-3L
LAND PATTERN SOT-23-3L
Note 1 : Grid placement courtyard is 8 x 8 elements (4mm x 4mm) in accordance with the international grid
detailed in IEC Publication 97.
ECN99-656
6
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
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