Cherry Semiconductor CS5205-5GT3, CS5205-3GT3, CS5205-3GDPR3, CS5205-3GDP3, CS5205-1GT3 Datasheet
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Features
■ Output Current to 5A
■ Output Trimmed to +/- 1%
■ Dropout Voltage
1.2V @ 5A
■ Fast Transient Response
■ Fault Protection Circuitry
Thermal Shutdown
Overcurrent Protection
Safe Area Protection
Package Options
3L TO-220
Tab (V
OUT
)
CS5205-1,-3,-5
5A Adjustable, and 3.3V
and 5V Fixed Linear Regulators
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CS5205-1,-3,-5
The CS5205-X series of linear regulators provides 5A at adjustable
and fixed voltages with an accuracy of ±1% and ±2% respectively.
The adjustable version uses two
external resistors to set the output
voltage within a 1.25V to 13V
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 1V
depending on the output current
level. The maximum quiescent current is only 10mA at full load.
The regulators are fully protected
against overload conditions with
protection circuitry for Safe
Operating Area (SOA), overcurrent
and thermal shutdown.
The CS5205-X is pin compatible
with the LT1084 family of linear
regulators but has lower dropout
voltage.
The regulators are available in TO220 and surface mount D2packages.
Block Diagram
CS5205-3, -5
1 Gnd
2V
OUT
3V
IN
CS5205-1
1 Adj
2V
OUT
3V
IN
CS5205-1
CS5205-3, -5
Description
3L D2PAK
1
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
A Company
¨
Rev. 6/12/97
V
IN
Shutdown
Bandgap
Thermal
V
OUT
Output
Current
Limit
+
-
Error
Amplifier
Adj
V
V
IN
Output
Current
Limit
Thermal
Shutdown
Bandgap
-
+
Error
Amplifier
OUT
Gnd
2
CS5205-1,-3,-5
Absolute Maximum Ratings
Supply Voltage, V
CC
..................................................................................................................................................................17V
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
Electrical Characteristics: C
IN
= 10µF, C
OUT
= 22µF Tantalum, V
IN
Ð V
OUT
=3V, VIN² 15V, 0¡C ² TA ² 70¡C, TJ² +150¡C,
unless otherwise specified, I
full load
= 5A.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Electrical Characteristics: C
IN
= 10µF, C
OUT
= 22µF Tantalum, V
IN
Ð V
OUT
=3V, VIN² 10V, 0¡C ² TA ² 70¡C, TJ² +150¡C,
unless otherwise specified, I
full load
= 5A.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
■ Fixed Output Voltage (CS5205-3, -5)
CS5205-5 VINÐV
OUT
=1.5V; 4.9 5.0 5.1 V
(Notes 1 and 2) 0²I
OU T
²5A (-2%) (+2%)
CS5205-3 VINÐV
OUT
=1.5V; 3.234 3.300 3.366 V
(Notes 1 and 2) 0²I
OUT
²5A (-2%) (+2%)
Line Regulation 1.5V²VINÐV
OUT
² 6V; I
OUT
=10mA 0.04 0.20 %
Load Regulation VINÐV
OUT
=1.5V; 0.08 0.40 %
(Notes 1 and 2) 10mA ² I
OUT
²5A
Dropout Voltage (Note 3) I
OUT
=5A 1.2 1.3 V
Current Limit VINÐV
OUT
=3V; TJ³ 25¡C 5.5 8.5 A
VINÐV
OUT
=9V 1.0 A
Quiescent Current VIN²9V; I
OUT
= 10mA 5.0 10.0 mA
Thermal Regulation 30ms pulse; TA=25¡C 0.003 %/W
Ripple Rejection f=120Hz; I
OUT
=5A 75 dB
Temperature Stability 0.5 %
■ Adjustable Output Voltage (CS5205-1)
Reference Voltage VINÐV
OUT
=1.5V; V
Adj
= 0V 1.241 1.254 1.266 V
(Notes 1 and 2) 10mA²I
OUT
²5A (-1%) (+1%)
Line Regulation 1.5V²VINÐV
OUT
²6V; I
OUT
=10mA 0.04 0.20 %
Load Regulation VINÐV
OUT
=1.5V; 0.08 0.4 %
(Notes 1 and 2) 10mA²I
OUT
²5A
Dropout Voltage (Note 3) I
OUT
=5A 1.2 1.3 V
Current Limit VINÐV
OUT
=3V; TJ³ 25¡C 5.5 8.5 A
VINÐV
OUT
=9V 1.0 A
Minimum Load Current VINÐV
OUT
=7V 1.2 6 mA
Adjust Pin Current 50 100 µA
Adjust Pin Current Change 1.5V²VINÐV
OUT
²4V; 0.2 5.0 µA
10mA²I
OUT
²5A
Thermal Regulation 30ms pulse; TA=25¡C 0.003 %W
Ripple Rejection f=120Hz; C
Adj
=25µF; I
OUT
=5A 82 dB
Temperature Stability 0.5 %
RMS Output Noise 10Hz²f²10kHz; TA=25¡C 0.003 %V
OUT
Thermal Shutdown 150 180 ¡C
Thermal Shutdown Hysteresis 25 ¡C
CS5205-1,-3,-5
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Package Pin Description
PACKAGE PIN # PIN SYMBOL FUNCTION
Typical Performance Characteristics
Dropout Voltage vs. Output Current
Reference Voltage vs. Temperature
Load Regulation vs. Output Current
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
■ Fixed Output Voltage (CS5205-3, -5): continued
RMS Output Noise (%V
OUT
) 10Hz²f²10kHz 0.003 %V
OUT
Thermal Shutdown 150 180 ¡C
Thermal Shutdown Hysteresis 25 ¡C
Note 1: Load regulation and output voltage are measured at a constant junction temperature by low duty cycle pulse testing. Changes in out-
put voltage due to thermal gradients or 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.
Electrical Characteristics: C
IN
= 10µF, C
OUT
= 22µF Tantalum, V
IN
Ð V
OUT
=3V, VIN² 10V, 0¡C ² TA ² 70¡C, TJ² +150¡C,
unless otherwise specified, I
full load
= 5A.
CS5205 -1 CS5205 -3, -5
D2PAK 3L TO-220 D2PAK 3L TO-220
1 1 N/A N/A Adj Adjust pin (low side of the internal reference).
222 2 V
OUT
Regulated output voltage (case).
333 3 VINInput voltage.
N/A N/A 1 1 Gnd Ground connection.
Minimum Load Current
1.30
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
Dropout Voltage (V)
0.85
0.80
0.75
0.70
0.200
0.175
0.150
0.125
0.100
0.075
0.050
Output Voltage Deviation (%)
0.025
0.000
= 25°C
T
CASE
01234 5
T
= 125°C
CASE
01 2 3 4 5
T
= 0°C
CASE
Output Current (A)
T
CASE
Output Current (A)
T
= 125°C
CASE
= 25°C
T
= 0°C
CASE
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
0 10 130
2.500
2.175
1.850
1.525
1.200
Minimum Load Current (mA)
0.875
T
CASE
0.550
123456
20 30 40 50 60 70 80 90 100 110 120
TJ (°C)
T
= 0°C
CASE
T
CASE
= 25°C
VIN – V
OUT
(V)
7
= 125°C
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