CM1581
5A LOW DROPOUT VOLTAGE REGULATOR
2002/02/05
Preliminary Rev. 1
Champion Microelectronic Corporation
Page 1
GENERAL DESCRIPTION
FEATURES
The CM1581 is a high performance low dropout regulator
rated for 5A output current with fixed 1.8V/2.5V/3.3V/5.0V and
adjustable output. It is designed for use in applications
requiring low dropout characteristics over the rated current
range.
When the second low-current input voltage is applied, the
dropout voltage can be as low as 100mV at light loads and up
to 500mV at maximum output current. On chip trimming
adjusts the reference voltage to 1%. These features are ideal
for low voltage microprocessor applications requiring a
regulated 1.8V to 3.6V power supply.
In addition, the CM1581 provides the device protections
including over current and thermal shutdown. The CM1581
series are ideal to the next generation microprocessor on
motherboards where both 5V and 3.3V are available.
!
Input-Output differential of typical 500mV at 5A and low
quiescent current
!
Output Current is excess of 5A
!
Remote sense pin available
!
Reverse battery protection
!
Short Circuit Protection
!
Internal Thermal Overload Protection
!
5L TO-220 and 5L TO-263 package available
APPLICATIONS
!
Power Supplies
!
Computer Add-On Cards
!
Other Applications Requiring Low Dropout Voltage Over
Rated Current
PIN CONFIGURATION
TO-220
Top View
12
3
45
TO-263
Top View
3
2
1
SENSE
4
5
GN D /A D J
V OUT
V CONTROL
VPOWER
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