Cherry Semiconductor CS5207-2GT3 Datasheet
1
Features
■ Output Current to 7A
■ Output Voltage Trimmed
to ±2%
■ Dropout Voltage
1.45V @ 7A
■ Fast Transient Response
■ Fault Protection Circuitry
Thermal Shutdown
Overcurrent Protection
Safe Area Protection
Package Options
3L TO-220
Tab (V
OUT
)
CS5207-2
7A, 1.5V Fixed Linear Regulator
1
CS5207-2
The CS5207-2 provides 7A at 1.5V
with an accuracy of ± 2%.
The regulator is intended for use as
an active termination for the GTL
bus on Intel based motherboards.
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 CS5207-2 is available in TO-220
packages.
Block Diagram
1 Gnd
2V
OUT
(Tab)
3V
IN
Description
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
ESD Damage Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2kV
A Company
¨
Rev. 6/12/98
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
V
IN
V
OUT
Thermal
Shutdown
Bandgap
-
+
Amplifier
Error
Output
Current
Limit
Gnd
2
CS5207-2
Typical Performance Characteristics
Dropout Voltage vs. Output Current
Output Voltage vs. Temperature
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
= 7A.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Package Pin Description
PACKAGE PIN # PIN SYMBOL FUNCTION
■ Fixed Output Voltage
CS5207-2 V
IN
Ð V
OUT
= 1.65V; 1.47 1.50 1.53 V
(Notes 1 and 2) 0² I
OU T
² 7A (-2%) (+2%)
Line Regulation 1.65V ² VINÐV
OUT
² 6V; I
OUT
= 10mA 0.04 0.20 %
Load Regulation (Notes 1 and 2) V
IN
Ð V
OUT
= 1.65V; 10mA ² I
OUT
² 7A 0.08 0.40 %
Dropout Voltage (Note 3) I
OUT
= 7A 1.42 1.65 V
Current Limit V
IN
Ð V
OUT
= 3V; TJ³ 25¡C 7.1 8.5 A
V
IN
Ð V
OUT
= 12V 1.0 A
Quiescent Current V
IN
² 9V; I
OUT
= 10mA 5.0 10.0 mA
Thermal Regulation 30ms pulse; TA = 25¡C 0.003 %/W
Ripple Rejection f = 120Hz; I
OUT
= 7A 80 dB
Temperature Stability 0.5 %
RMS Output Noise (%V
OUT
) 10Hz ² f ² 10kHz 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.
3L TO-220
1 Gnd Ground connection.
2V
OUT
Regulated output voltage (case).
3V
IN
Input voltage.
1.55
1.50
1.45
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
Dropout Voltage (V)
1.00
0.95
0.90
0.85
T
= 25°C
CASE
0.80
0.75
0.70
01 2 3 4 5 6
T
= 0°C
CASE
Output Current (A)
T
= 125°C
CASE
7
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
TJ (°C)
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