Page 1
POWER MANAGEMENT
SC1202 & SC1202A
600mA Low Dropout Positive
Voltage Regulator
Description
The SC1202 series of high performance positive voltage
regulators are designed for use in applications requiring
low dropout performance at full rated current.
Additionally, the SC1202 series provides excellent
regulation over variations due to line, load and
temperature.
Outstanding features include low dropout performance
at rated current, fast transient response, internal
current limiting and thermal shutdown protection of the
output device. The SC1202 series are three terminal
regulators available in the surface mount SOT-223
package.
Typical Application Circuits
Fixed Voltage Regulator
Features
u Low dropout performance, 1.3V max.
u Full current rating over line and temperature
u Fast transient response
u ±2% total output regulation over line, load
and temperature
u Adjust pin current max. 90µA over temperature
u Adjustable or fixed output voltages
u Line regulation 0.2% max.
u Load regulation 0.4% max.
u SOT-223 package
Applications
u Low voltage microcontrollers
u Microprocessor I/O supplies
u 5V to 3.3V conversion for memory, ASIC, custom
circuits, etc.
U1 SC1202-3.3
C1
10uF Tant.
3
VIN > 4.75V VOUT = 3.3V
+
Adjustable Voltage Regulator
U1 SC1202
C1
10uF Tant.
3
VIN > 4.75V VOUT = 3.45V
+
Notes:
(1) C1 needed if device is far from filter capacitors
(2) C2 minimum value required for stability
TAB
GND
1
TAB
ADJ
1
2
OUTIN
+
C2
10uF Tant.
2
OUTIN
R1
133 Ohm, 1%
R2
232 Ohm, 1%
+
C2
10uF Tant.
2R
1VV
+•=
1R
2RI
•+
ADJREFOUT
Revision 8/30/2000
1 www.semtech.com
Page 2
POWER MANAGEMENT
Absolute Maximum Ratings
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Electrical Characteristics
Unless otherwise specified, Adj. VIN = 2.65 to 7V (15.0V for A version) and Adj. IO = 10mA to 600mA;
Fixed VIN = 4.75 to 7V (15.0V for A version) and Fixed IO = 0mA to 600mA
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2ã 2000 Semtech Corp. www.semtech.com
Page 3
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Unless otherwise specified, Adj. VIN = 2.65 to 7V (15.0V for A version) and Adj. IO = 10mA to 600mA;
Fixed VIN = 4.75 to 7V (15.0V for A version) and Fixed IO = 0mA to 600mA
SC1202 &
SC1202A
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NOTES:
(1) Low duty cycle pulse testing with Kelvin connections required.
(2) Bandwidth of 10 Hz to 10 kHz.
(3) 120 Hz input ripple, (C
for ADJ = 25µF).
ADJ
(4) Over Temp. (O.T.) = over specified operating junction temperature range.
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3ã 2000 Semtech Corp. www.semtech.com
Page 4
POWER MANAGEMENT
Pin Configuration Ordering Information
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Pin Descriptions
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(1) Where X.X denotes voltage options. Available voltages are: 3.3V. Leave blank for adjustable version (see
TUPTUOSIBAT
V
). Contact factory for additional voltage options.
OUT
(2) Only available in tape and reel packaging. A reel
contains 2500 devices.
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Block Diagram
Marking Information
z.zz: Voltage option (example: 2.85). Left blank for
adjustable parts
yyww: Datecode (example: 9812)
xxxx: Semtech Lot # (example: 80101)
4ã 2000 Semtech Corp. www.semtech.com
Page 5
POWER MANAGEMENT
Outline Drawing - SOT-223
SC1202 &
SC1202A
Land Pattern - SOT-223
Contact Information
Semtech Corporation
Power Management Products Division
652 Mitchell Rd., Newbury Park, CA 91320
Phone: (805)498-2111 FAX (805)498-3804
5ã 2000 Semtech Corp. www.semtech.com
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