Cherry Semiconductor CS5205A-1GT3, CS5205A-1GDPR3, CS5205A-1GDP3 Datasheet

1

Features

■ Output Current to 5A

■ Output Trimmed to +/- 1%

■ Dropout Voltage

1.15V @ 5A

■ Fast Transient Response

■ Fault Protection Circuitry

Thermal Shutdown
Overcurrent Protection
Safe Area Protection

Package Options

3L TO-220

Tab (V

OUT

)

CS5205A-1

5A Adjustable Linear Regulator

1

CS5205A-1

The CS5205A-1 linear regulator
provides 5A at an adjustable volt­age with an accuracy of ±1%. Two
external resistors are used to set the
output voltage within a 1.25V to
13V range.

The 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 as low as 1V

depending on the output current
level. The maximum quiescent cur­rent is only 10mA at full load.

The regulator is fully protected
against overload conditions with
protection circuitry for Safe
Operating Area (SOA), overcurrent
and thermal shutdown.

The CS5205A-1 is pin compatible
with the LT1084 family of linear
regulators but has lower dropout
voltage.

The regulator is available in TO-220
and surface mount D2packages.

Block Diagram

1 Adj
2V

OUT

3V

IN

Description

3L D2PAK

1

Rev. 7/8/97

Cherry Semiconductor Corporation

2000 South County Trail, East Greenwich, RI 02818

Tel: [phone] Fax: [phone]

Email: [e-mail]

Web Site: www.cherry-semi.com

A Company

¨

V

IN

V

OUT

Thermal

Shutdown

Bandgap

-

+

Amplifier

Error

Output

Current

Limit

Adj

2

CS5205A-1

Package Pin Description

PACKAGE PIN # PIN SYMBOL FUNCTION

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

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

■ Adjustable Output Voltage

Reference Voltage V

INÐVOUT

=1.5V; V

Adj

= 0V 1.241 1.254 1.266 V

(Notes 1 and 2) 10mA²I

OUT

²5A (-1%) (+1%)

Line Regulation 1.5V²V

INÐVOUT

²6V; I

OUT

=10mA 0.04 0.20 %

Load Regulation V

INÐVOUT

=1.5V; 0.08 0.4 %

(Notes 1 and 2) 10mA²I

OUT

²5A

Dropout Voltage (Note 3) I

OUT

=5A; TJ³ 25¡C 1.15 1.25 V

Current Limit V

INÐVOUT

=3V; TJ³ 25¡C 5.5 8.5 A

VINÐV

OUT

=9V 1.0 A

Minimum Load Current V

INÐVOUT

=7V 1.2 6 mA
Adjust Pin Current 50 100 µA
Adjust Pin Current Change 1.5V²V

INÐVOUT

²4V; 0.2 5.0 µA

10mA²I

OUT

²5A

Thermal Regulation 30ms pulse; T

A

=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; T

A

=25¡C 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.

D2PAK 3L TO-220

1 1 Adj Adjust pin (low side of the internal reference).
22V

OUT

Regulated output voltage (case).

33VINInput voltage.