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PDF SC1461 Data sheet ( Hoja de datos )
| Número de pieza | SC1461 | |
| Descripción | Multi Mode Capless Charge Pump | |
| Fabricantes | Semtech Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SC1461 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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SC1461
Multi Mode Capless ChargeTM Pump
POWER MANAGEMENT
Description
Features
The SC1461 is a versatile charge pump designed for use
in battery operated power supply applications. A simple,
low current boost circuit can be implemented without
costly inductors or capacitors. Internal MOSFETs and
control circuitry eliminate the need for costly board space
and design time. The small device footprint allows for
compact circuit design.
K Small size - 5 pin SOT-23 package
K 4% voltage accuracy
K 65uA typ. quiescent current
K User selectable output voltages of 1.515* VIN,
1.32 * VIN, or adjustable output
K All specifications rated over full temperature range
(-40°C to 85°C)
The SC1461 is a CaplessTM charge pump for applications
that require up to 8mA of output current. Three modes
of output voltage can be programmed via the ADJ pin.
Modes include:
VO = (1.32*VIN) ± 4% @ 7mA of output current
Applications
K PDA Power Supplies
K Notebook Power Supplies
K Peripheral Card Supplies
K Industrial Power Supplies
K High Density DC/DC Conversion
VO = (1.515 * VIN) ± 4% @ 4mA of output current
and the adjustable mode where an external resistor
divider determines the output voltage.
The SC1461 is packaged in a 5 lead SOT-23 package.
Typical Application Circuit
Vin = 3.3V
Cin
0.22uF
SC1461
Vo = 5.0V
Vin = 2.5V
Cout
47nF
Cin
0.22uF
SC1461
Vo = 3.3V
Cout
47nF
Vo
=
1.03
×
Vin
×
1+
R1
R1+ R2
Vo Vin
SC1461
Cout
47nF
Cin
R1 0.22uF
Vin
R2
Revision 1, December 2000
1
www.semtech.com
1 page  
POWER MANAGEMENT
Typical Characteristics
3.7 00
Vo ut Vs Io ut (1.515 Mo de , V in = 2.25V)
3.5 00
3.3 00
3.1 00
2.9 00
2.7 00
2.5 00
0 00. 0E+0
+4%
25°C
- 40°C
85°C
-4%
2. 0E-3
4. 0E-3
Io ut ( A)
6. 0E-3
Typical Vout vs Iout
1.515 Mode Vin = 2.25V
8. 0E-3
Vou t Vs Iou t (1.515 Mode, Vin = 2 .5V )
4.1 00
3.9 00
3.7 00
3.5 00
3.3 00
3.1 00
2.9 00
2.7 00
2.5 00
0 00. 0E+0
+4%
25°C
- 40°C
85°C
-4%
2. 0E-3
4. 0E-3
Io u t (A)
6. 0E-3
8. 0E-3
Typical Vout vs Iout
1.515 Mode Vin = 2.50V
SC1461
V ou t Vs Iou t (1.515 Mode, Vin = 3 .3V)
5.3 00
5.1 00
4.9 00
4.7 00
4.5 00
4.3 00
4.1 00
3.9 00
3.7 00
3.5 00
0 00. 0E+0
+4%
25°C
- 40°C
85°C
-4%
2. 0E-3
4. 0E-3
Io u t (A)
6. 0E-3
8. 0E-3
Typical Vout vs Iout
1.515 Mode Vin = 3.30V
6.0 00
V o ut V s Iout (1 .5 15 Mo de , V in = 3.63 V )
5.5 00
5.0 00
4.5 00
4.0 00
3.5 00
0 00. 0E+0
+4%
25°C
- 40°C
85°C
-4%
2.0 E-3
4.0 E-3
Io ut ( A)
6.0 E-3
Typical Vout vs Iout
1.515 Mode Vin = 3.63V
8.0 E-3
2000 Semtech Corp.
5
www.semtech.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet SC1461.PDF ] | |
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