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PDF CM3103 Data sheet ( Hoja de datos )
| Número de pieza | CM3103 | |
| Descripción | 400mA SMARTOR REGULATOR Vaux SWITCH | |
| Fabricantes | California Micro Devices | |
| Logotipo |  |
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CM3103
400mA SmartORTM Regulator with VAUX Switch
Features
• Continuous 3.3V / 400mA output from two inputs
• Complete Power Management solution
• Built-in hysteresis when selecting input supplies
• Integrated switch featuring low RDSON (0.25Ω
typ.)
• Foldback current limiting protection
www.DataShee•t4U.cTohmermal overload shutdown protection
• 8-pin SOIC package
• Lead-free version available
Applications
• PCI adapter cards with Wake-On-LAN
• Network Interface Cards (NICs)
• Multiple power supply systems
• Systems with standby capabilities
Product Description
The CM3103 combines a fixed voltage regulator and a
VAUX switch in a single 8-pin SOIC package. The volt-
age regulator is capable of delivering up to 400mA con-
tinuously at 3.3V. The output power is provided from
two independent input voltage sources on a prioritized
basis. Power is always taken in priority of VCC, then
VAUX.
When VCC (5V) is present, the device automatically
enables the regulator, producing a stable 3.3V output
at VOUT, while disabling the VAUX switch.
When only VAUX (3.3V) is present, the device provides
a low impedance direct connection (0.25Ω typ.) from
VAUX to VOUT.
All the necessary control circuitry needed to provide a
smooth and automatic transition between both supplies
has been incorporated. This allows the VCC input sup-
ply to be dynamically switched without loss of output
voltage.
The CM3103 is available with optional lead-free finish-
ing.
Typical Application Circuit
Simplified Electrical Schematic
VCC
VAUX
5V
+ CIN
3.3V 1µF
CM3103
VCC 3.3V/400mA
VOUT
VAUX
GND
+ CEXT
10µF
VCC
VOUT
+
Vdeselect
-
4.2V
Controller
Enable
AuxSw
VAUX
AuxSw
0.25Ω
3.3V
+
-
Regulator Amp
GND
GND
VOUT
© 2004 California Micro Devices Corp. All rights reserved.
01/28/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214
L Fax: 408.263.7846 L www.calmicro.com
1
1 page  
CM3103
Performance Information
CM3103 Typical DC Characteristics (nominal conditions unless specified otherwise)
VCC Supply Current vs. Voltage
1.0
0.9
0.8
0.7
0.6
www.DataSheet4U.com0.5
0.4
0.3
0.2
0.1
0.0
01 234 5
VCC Input Voltage [V]
6
Ground Current vs. Output Load
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0
100 200 300
Load Current [mA]
400
0.5
0.4
0.3
0.2
0.1
0.0
0
3.4
3.3
VAUX Supply Current vs. Voltage
123
VAUX Input Voltage [V]
Line Regulation
5mA
4
3.2
400mA
3.1
3.0
3.5
4 4.5 5 5.5
Line Voltage [V]
6
© 2004 California Micro Devices Corp. All rights reserved.
01/28/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214
L Fax: 408.263.7846 L www.calmicro.com
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet CM3103.PDF ] | |
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