Cherry Semiconductor CS5201-1GDP3, CS5201-1GT3, CS5201-1GSTR3, CS5201-1GST3, CS5201-1GDPR3 Datasheet
1
Features
■ Output Current to 1A
■ Output Accuracy to ±1%
over Temperature
■ Dropout Voltage (typical)
1.0V @ 1A
■ Fast Transient Response
■ Fault Protection
Current Limit
Thermal Shutdown
Package Options
3L TO-220
Tab (V
OUT
)
CS5201-1
1A Adjustable Linear Regulator
1
CS5201-1
Application Diagram
CS5201 -1
1 Adj
2V
OUT(Tab)
3V
IN
Description
3L D2PAK
Tab (V
OUT
)
1
Consult factory for fixed output
voltage versions.
The CS5201-1 linear regulator
provides 1A with an output
voltage accuracy of ±1%. The
device uses two external resistors to set the output voltage
within a 1.25V to 5.5V range.
This regulator is intended for
use as a post regulator and
microprocessor supply. The fast
loop response and low dropout
voltage make this regulator
ideal for applications where low
voltage operation and good
transient response are important.
The circuit is designed to operate with dropout voltages less
than 1.2V at 1A output current.
Device protection includes overcurrent and thermal shutdown.
The CS5201 is pin compatible
with the LT1086 family of linear
regulators.
The regulator is available in
TO-220, surface mount D
2
, and
SOT-223 packages.
A Company
¨
1
3L SOT-223
Tab (V
OUT
)
Rev. 2/16/98
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
5V
10mF
5V
V
IN
CS5201-1
Adj
0.1mF
5V Tant
V
OUT
3.3V @ 1A
124W
1%
200W
1%
22mF
5V
D2PAK TO-220 SOT-223
1 1 1 Adj Adjust pin (low side of the internal reference).
22 2 V
OUT
Regulated output voltage (case).
33 3 V
IN
Input voltage.
CS5201-1
Package Pin Description
PACKAGE PIN # PIN SYMBOL FUNCTION
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Electrical Characteristics: C
IN
= 10µF, C
OUT
= 22µF Tantalum, V
OUT
+ V
DROPOUT
< VIN< 7V, 0¡C ² TA ² 70¡C, TJ² +150¡C,
unless otherwise specified, I
full load
= 1A.
2
■ Adjustable Output Voltage
Reference Voltage VINÐV
OUT
=1.5V; V
Adj
= 0V 1.241 1.254 1.266 V
(Notes 1 and 2) 10mA²I
OUT
²1A (-1%) (+1%)
Line Regulation 1.5V²VINÐV
OUT
²5.75V; I
OUT
=10mA 0.02 0.20 %
Load Regulation VINÐV
OUT
=1.5V; 10mA²I
OUT
²1A 0.04 0.4 %
(Notes 1 and 2)
Dropout Voltage (Note 3) I
OUT
=1A 1.0 1.2 V
Current Limit VINÐV
OUT
=3V; TJ³ 25¡C 1.1 3.1 A
Minimum Load Current (Note 4) VIN=7V ; V
Adj
=0 0.6 2.0 mA
Adjust Pin Current VINÐV
OUT
=3V; I
OUT
=10mA 50 100 µA
Thermal Regulation (Note 5) 30ms pulse; TA=25¡C 0.002 0.020 %/W
Ripple Rejection (Note 5) f=120Hz; I
OUT
=1A; VINÐV
OUT
=3V; 80 dB
V
RIPPLE
=1V
PP
Thermal Shutdown (Note 6) 150 180 210 ¡C
Thermal Shutdown Hysteresis 25 ¡C
(Note 6)
Note 1: Load regulation and output voltage are measured at a constant junction temperature by low duty cycle pulse testing. Changes in output
voltage due to temperature changes must be taken into account separately.
Note 2: Specifications apply for an external Kelvin sense connection at a point on the output pin 1/4Ó from the bottom of the package.
Note 3: Dropout voltage is a measurement of the minimum input/output differential at full load.
Note 4: The minimum load current is the minimum current required to maintain regulation. Normally the current in the resistor divider used
to set the output voltage is selected to meet the minimum load requirement.
Note 5: Guaranteed by design, not 100% tested in production.
Note 6: Thermal shutdown is 100% functionally tested in production.
Absolute Maximum Ratings
Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7V
Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40¡C to 70¡C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150¡C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-60¡C to 150¡C
Lead Temperature Soldering
Wave Solder (through hole styles only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 sec. max, 260¡C peak
Reflow (SMD styles only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60 sec. max above 183¡C, 230¡C peak
ESD Damage Threshold (Human Body Model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2kV
CS5201-1
3
Typical Performance Characteristics
Dropout Voltage vs. Output Current
Reference Voltage vs. Temperature
Load Regulation vs. Output Current
Minimum Load Current vs VIN-V
OUT
Block Diagram
V
OUT
V
IN
Output
Current
Limit
Thermal
Shutdown
+-
Error
Amplifier
Bandgap
Reference
Adj
1.00
0.95
0.90
(V)
0.85
Dropout
V
0.80
0.75
0
200
T
CASE
= 0°C
0.100
0.075
0.050
0.025
Output Voltage Deviation (%)
0.000
012
= 25°C
T
CASE
T
= 125°C
CASE
400 600 800 1000
I
(mA)
OUT
T
= 125°C
CASE
T
= 25°C
CASE
T
= 0°C
CASE
Output Current (A)
0.10
0.08
0.06
0.04
0.02
0.00
-0.02
-0.04
-0.06
Output Voltage Deviation (%)
-0.08
-0.10
-0.12
20 30 40 50 60 70 80 90 100 110 120
0 10 130
0.65
0.60
T
CASE
T
= 25°C
0.55
0.50
Minimum Load Current (mA)
0.45
0.40
123456
CASE
TJ (°C)
= 0°C
VIN – V
OUT
T
CASE
C
IN =COUT
(V)
= 125°C
=22mF Tantalum
7
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