CM3003
1.5 Amp Dual Mode Low Dropout CMOS Regulator
Features
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Adjustable Output or Internally Fixed
375mV dropout at 1.5A load current
Operates from 2.2V to 5.5V input supply
Low Ground current (330µA at 1.5A Load)
Minimal output capacitance required
Current Limit Protection
Thermal Overload Protection
Reverse Voltage Protection
Thermally enhanced 8-pin SOIC package
Lead-free versions available
Product Description
The CM3003 is a family of very low dropout regulators
that offers dual mode operation. When the Adjust con-
trol pin (ADJ) is grounded, these devices automatically
enter a fixed voltage mode and deliver either a 1.8V or
2.5V output capable of supplying 1.5A, depending on
the device utilized. When the Adjust pin is connected to
an external resistor network the device automatically
operates as an adjustable regulator. The Adjust pin can
also be tied directly to the OUT pin which configures
the CM3003 as a 1.2V regulator.
An Enable control pin (EN) allows the device to be
placed in a low current mode.
Applications
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Low Voltage "Core" processors
Graphics Cards
Gigabit NIC Cards
PC Motherboards
Notebooks
The CM3003 devices are fully protected, offering both
overload current limiting, short circuit protection and
high temperature thermal shutdown. These devices
also includes reverse voltage protection that minimizes
any reverse current flow back into the output pin.
The CM3003 devices are housed in a space saving, 8-
pin power SOIC packages which has been thermally
enhanced (integral leadframe) to ensure maximum
junction to ambient power dissipation.
The CM3003 devices are available with optional lead-
free finishing.
Typical Application Circuit
Simplified Electrical Schematic
IN
2.2V-5.5V
Controller
CM3003
2.2V - 5.5V
V
IN
10
µ
F
IN
EN
GND
OUT
ADJ
100
n
F 10
µ
F
1.8V/2.5V@1.5A
V
OUT
EN
Over Current
Short Circuit
Over Temp
1.2V Reference
Voltage
+
EN
-
GND
2.5V Output when ADJ = GND
Automatically selects Adjustable Output
(when external resistors are present)
Fixed
Adj
120K
130K
1.5 AMP
OUT
ADJ
GND
© 2004 California Micro Devices Corp. All rights reserved.
01/15/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
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Tel: 408.263.3214
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Fax: 408.263.7846
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www.calmicro.com
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CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
