CS5203A−1, CS5203A−2,
CS5203A−3, CS5203A−5
3.0 A Adjustable, and
Fixed 1.5 V, 3.3 V and 5.0 V
Linear Regulators
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The CS5203A series of linear regulators provides 3.0 A at
adjustable and fixed voltages with an accuracy of ±1.0% and ±2.0%
respectively. The adjustable version uses two external resistors to set
the output voltage within a 1.25 V to 13 V range.
The regulators are intended for use as post regulators and
microprocessor supplies. The fast loop response and low dropout
voltage make these regulators ideal for applications where low voltage
operation and good transient response are important.
The circuit is designed to operate with dropout voltages as low as
1.0 V depending on the output current level. The maximum quiescent
current is only 10 mA at full load.
TO−220
THREE LEAD
T SUFFIX
Adjustable
Output
Tab = V
OUT
CASE 221A
Pin 1. Adj
2. V
3. V
OUT
IN
1
2
3
The regulators are fully protected against overload conditions with
protection circuitry for Safe Operating Area (SOA), overcurrent and
thermal shutdown.
The CS5203A is pin compatible with the LT1085 family of linear
regulators but has lower dropout voltage.
2
D PAK−3
Fixed
Output
DP SUFFIX
CASE 418AB
Tab = V
OUT
1
1
Pin 1. GND
2
3
2. V
3. V
OUT
IN
2
The regulators are available in TO−220−3 and surface mount
D PAK−3
2
(Short Lead)
DPS SUFFIX
CASE 418F
D PAK−3 packages.
2
Features
3
• Pb−Free Package is Available
• Output Current to 3.0 A
• Output Trimmed to ±1.0%
• Dropout Voltage 1.05 V @ 3.0 A
• Fast Transient Response
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 8 of this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 8 of this data sheet.
• Fault Protection Circuitry
♦ Thermal Shutdown
♦ Overcurrent Protection
♦ Safe Area Protection
V
OUT
V
IN
Output
Current
Limit
Thermal
Shutdown
−
+
Error
Amplifier
Adj
Bandgap
Figure 1. Block Diagram − CS5203A−1
Semiconductor Components Industries, LLC, 2004
1
Publication Order Number:
June, 2004 − Rev. 7
CS5203A/D