SC1460CSK-5.0TR [SEMTECH]
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| 型号： | SC1460CSK-5.0TR |
| 厂家： | 
SEMTECH CORPORATION |
| 描述： | 暂无描述 稳压器 开关式稳压器或控制器 电源电路 开关式控制器 光电二极管 泵 |
| 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
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
PRELIMINARY - July 6, 1999
DESCRIPTION
FEATURES
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.
•
•
•
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
DEVICE(1)(2)
PACKAGE
BLOCK DIAGRAM
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
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
PRELIMINARY - July 6, 1999
ELECTRICAL CHARACTERISTICS
Unless specified: VIN = 3.3V (-5.0 parts), VIN = 2.5V (-3.3 parts), 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
2.25
3.63
150
4
V
µA
%
IIN
IO = 0mA VIN = 2.5 V
SC1460CSK - 3.3, VIN = 2.5V
SC1460CSK - 5.0, VIN = 3.3V
IO = 4mA, COUT = 47nF
100
1.32 x VIN
1.515 X VIN
50
VO
-4
4
%
4
Output Ripple (pk-pk)
VR
IO
mV
Output Current
Efficiency
4
5
mA
%
IO = 4mA
50
56
η
Oscillator Frequency
OSC
SC1460CSK - 3.3, VIN = 2.5V
SC1460CSK - 5.0, VIN = 3.3V
Power Up with IO = 4mA
8
MHz
8.75
100
Time to Regulation at
Turn-On
tON
µs
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
PRELIMINARY - July 6, 1999
Typical Eff. vs. Vo @25 Deg. C.
Typical Vo vs. Io @25 Deg. C.
60
55
50
45
5
4.5
4
3.5
3
Io = 4 mA
Io = 5 mA
Io = 6 mA
Vin = 3.60V
Vin = 3.30V
Vin = 2.50V
Vin = 2.25V
2.5
2
2.5
3
3.5
4
4.5
5
0
1
2
3
4
5
6
Vo (V)
Io (mA)
Typical Eff. vs. Vin @25 Deg. C.
Typical Iin vs. Vin @25 Deg. C.
60
55
50
45
16
14
12
10
8
6
Io = 6 mA
4
Io = 4mA
Io = 5mA
Io = 6mA
Io = 5 mA
Io = 4 mA
Io = 0 mA
2
0
2
2.5
3
3.5
4
2
2.5
3
3.5
4
Vin (V)
Vin (V)
Typical Iin vs. Io @25 Deg. C.
Typical Eff. vs. Io @25 Deg. C.
16
14
12
10
8
60
55
50
45
6
4
Vin = 2.25V
Vin = 3.60V
Vin = 3.30V
Vin = 2.50V
Vin = 2.25V
Vin = 2.50V
Vin = 3.30V
Vin = 3.60V
2
0
0
1
2
3
4
5
6
4
4.5
5
5.5
6
Io (mA)
Io (mA)
3
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
5mA CAPLESSTM CHARGE PUMP
SC1460
PRELIMINARY - July 6, 1999
Typical Vo vs. Vin @25 Deg. C.
5
4.5
4
3.5
3
Io = 0 mA
Io = 4 mA
Io = 5 mA
Io = 6 mA
2.5
2
2
2.5
3
3.5
4
Vin (V)
4
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
5mA CAPLESSTM CHARGE PUMP
SC1460
PRELIMINARY - July 6, 1999
Typical Eff. vs. Ta @ Io = 4 mA
Typical Vo ripple vs. Cout @ Vin = 2.50V
70.0E-3
60.0E-3
50.0E-3
40.0E-3
30.0E-3
20.0E-3
10.0E-3
000.0E+0
57
56
55
54
53
Iout = 4mA
Vin = 2.25 V
Vin = 2.50 V
Vin = 3.30 V
Vin = 3.60 V
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
Ta (Deg. C.)
Cout (F)
Typical Vo vs. Ta @ Vin = 2.50V
Vo ripple
3.5
3.4
3.3
3.2
3.1
3
2.9
2.8
2.7
2.6
2.5
Io = 0mA
Io = 4mA
Io = 5mA
Io = 6mA
0
10
20
30
40
50
60
70
Ta (Deg. C.)
Typical Iin vs. Ta @Io = 0 mA
0.19
0.17
0.15
0.13
0.11
0.09
0.07
0.05
Vin = 2.25 V
Vin = 2.50 V
Vin = 3.30 V
Vin = 3.60 V
0
10
20
30
40
50
60
70
Ta (Deg. C.)
5
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
5mA CAPLESSTM CHARGE PUMP
SC1460
PRELIMINARY - July 6, 1999
OUTLINE DRAWING SOT-23-3L
6
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
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