
Semiconductor Components Industries, LLC, 2002
February, 2002 – Rev. 4
1
Publication Order Number:
CS5203A/D
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
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.
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.
The regulators are available in TO–220 and surface mount D
2
PAK
packages.
Features
Output Current to 3.0 A
Output Trimmed to
±
1.0%
Dropout Voltage 1.05 V @ 3.0 A
Fast Transient Response
Fault Protection Circuitry
–
Thermal Shutdown
–
Overcurrent Protection
–
Safe Area Protection
+
–
Thermal
Shutdown
Bandgap
Output
Current
Limit
Error
Amplifier
V
OUT
Adj
V
IN
Figure 1. Block Diagram – CS5203A–1
http://onsemi.com
D
2
PAK
3–PIN
DP SUFFIX
CASE 418E
TO–220
THREE LEAD
T SUFFIX
CASE 221A
Tab = V
OUT
Pin 1. Adj
2. V
OUT
3. V
IN
123
Adjustable
Output
Fixed
Output
Tab = V
OUT
Pin 1. GND
2. V
OUT
3. V
IN
D
2
PAK
3–PIN
DPS SUFFIX
CASE 418F
Device
Package
Shipping
ORDERING INFORMATION*
CS5203A–1GT3
TO–220
50 Units/Rail
CS5203A–1GDPR3
D
2
PAK
750 Tape & Reel
CS5203A–1GDP3
D
2
PAK
50 Units/Rail
CS5203A–2GT3
TO–220
50 Units/Rail
CS5203A–2GDP3
D
2
PAK
50 Units/Rail
CS5203A–2GDPR3
D
2
PAK
750 Tape & Reel
CS5203A–2GDPSR3
D
2
PAK
750 Tape & Reel
CS5203A–3GT3
TO–220
50 Units/Rail
CS5203A–3GDP3
D
2
PAK
50 Units/Rail
CS5203A–3GDPR3
D
2
PAK
750 Tape & Reel
CS5203A–3GDPSR3
D
2
PAK
750 Tape & Reel
CS5203A–5GT3
TO–220
50 Units/Rail
*Additional ordering information can be found on page 8
of this data sheet.
TO–220 is 3–pin, straight leaded. D
2
PAK are all 3–pin.
See general marking information in the device marking
section on page 8 of this data sheet.
DEVICE MARKING INFORMATION
123
123