1
www.semtech.com
SC1202 & SC1202A
600mA Low Dropout Positive
Voltage Regulator
POWER MANAGEMENT
Revision 8/30/2000
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.
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. 90A over temperature
u
Adjustable or fixed output voltages
u
Line regulation 0.2% max.
u
Load regulation 0.4% max.
u
SOT-223 package
u
Low voltage microcontrollers
u
Microprocessor I/O supplies
u
5V to 3.3V conversion for memory, ASIC, custom
circuits, etc.
VIN > 4.75V
VOUT = 3.45V
VIN > 4.75V
VOUT = 3.3V
R2
232 Ohm, 1%
R1
133 Ohm, 1%
+
C2
10uF Tant.
+
C1
10uF Tant.
U1
SC1202
1
2
3
ADJ
OUT
IN
TAB
U1
SC1202-3.3
1
2
3
GND
OUT
IN
TAB
+
C2
10uF Tant.
+
C1
10uF Tant.
Notes:
(1) C1 needed if device is far from filter capacitors
(2) C2 minimum value required for stability
2
R
I
1
R
2
R
1
V
V
ADJ
REF
OUT
+
+
=
Fixed Voltage Regulator
Adjustable Voltage Regulator
Features
Applications
Description
Typical Application Circuits
2
2000 Semtech Corp.
www.semtech.com
SC1202 &
SC1202A
POWER MANAGEMENT
Unless otherwise specified, Adj. V
IN
= 2.65 to 7V (15.0V for A version) and Adj. I
O
= 10mA to 600mA;
Fixed V
IN
= 4.75 to 7V (15.0V for A version) and Fixed I
O
= 0mA to 600mA
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Absolute Maximum Ratings
Electrical Characteristics
3
2000 Semtech Corp.
www.semtech.com
SC1202 &
SC1202A
POWER MANAGEMENT
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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
ADJ
for ADJ = 25F).
(4) Over Temp. (O.T.) = over specified operating junction temperature range.
Unless otherwise specified, Adj. V
IN
= 2.65 to 7V (15.0V for A version) and Adj. I
O
= 10mA to 600mA;
Fixed V
IN
= 4.75 to 7V (15.0V for A version) and Fixed I
O
= 0mA to 600mA
Electrical Characteristics (Cont.)
4
2000 Semtech Corp.
www.semtech.com
SC1202 &
SC1202A
POWER MANAGEMENT
e
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Notes:
(1) Where X.X denotes voltage options. Available volt-
ages are: 3.3V. Leave blank for adjustable version (see
V
OUT
). Contact factory for additional voltage options.
(2) Only available in tape and reel packaging. A reel
contains 2500 devices.
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z.zz:
Voltage option (example: 2.85). Left blank for
adjustable parts
yyww: Datecode (example: 9812)
xxxx:
Semtech Lot # (example: 80101)
Pin Configuration
Ordering Information
Pin Descriptions
Block Diagram
Marking Information
5
2000 Semtech Corp.
www.semtech.com
SC1202 &
SC1202A
POWER MANAGEMENT
Semtech Corporation
Power Management Products Division
652 Mitchell Rd., Newbury Park, CA 91320
Phone: (805)498-2111 FAX (805)498-3804
Outline Drawing - SOT-223
Land Pattern - SOT-223
Contact Information
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