SGS Thomson Microelectronics GS-R1005 Datasheet

GS-R1005

50W STEP-DOWN SWITCHINGREGULATOR

Type V

GS-R1005 12 to 36 V 5 V 10 A

i

V

o

I

o

FEATURES

Wide inputvoltage range (12 to 36V)
High efficiency(80% min.)
Paralleloperation with current sharing
Synchronization
Remote inhibit/enable
Remote load voltagesense
Output short-circuitprotection
Soft-start
PCB or chassismountable

DESCRIPTION

The GS-R1005 is a step-down switching voltage
regulatorsuitable toprovide5V/10Aoutput voltage
froma wideinput voltagerange (12 to 36V).

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

DC Input Voltage
High Inhibitvoltage
Operating Case Temperature Range
Storage TemperatureRange

40 V
28 V

0 to +75 °C

– 20 to +105 °C

V
T

T

V
iinh

cop

stg

i

June 1994 1/7

GS-R1005

ELECTRICALCHARACTERISTICS (T

Symbol

Input Voltage Vo= 5.05V Io= 1.2 to 10A

V

i

Input Current Vi= 24V Io= 10A

l

i

Reflected Input Current Vi= 24V Io= 10A

l

ir

V

V

l

iinh

V

V

δV

δV

∆V

I

I

osc

δI

t

tr1

tr2

R

* Note: when output current isless than 1.2A, output ripplevoltage increases due to discontinuous operation.

Enable Input Voltage Vi= 12 to 36V Io= 1.2 to 10A

ien

InhibitInput Voltage Vi= 12 to 36V Io= 1.2 to 10A

iinh

InhibitInput Current Vi= 12 to 36V Io=1.2 to 10A

Output Voltage Vi= 12 to 36V Io= 1.2 to 10A

o

Output Ripple

or

Voltage
Line Regulation Vi= 12 to 36V Io= 10A

OL

Load Regulation Vi= 24V Io= 1.2 to 10A

OO

Total Remote Sense

o

Compensation
Output Current* Vi= 12 to 36V Vo= 5.05V

I

o

Output Current

ol

Limiting
Short-circuit Output

Current
Current Sharing

o

Deviation

Soft-start Time Vi= 24V Io= 10A

ss

Line Transient
Recovery Time

Load Transient
Recovery Time

Switching Frequency Vi= 24V Io= 1.2 to 10A

f

s

Efficiency Vi= 12 to 36V Io= 10A

η

Thermal Resistance

thc

Case-to-ambient

Parameter Test Conditions Min Typ Max Unit

=25°C unless otherwise specified)

amb

with external filter (C = 470µF)

V

=5V

iinh

Vi= 24V
Io= 10A

Vi= 24V
Io= 10A

Vi= 12 to 36V

Vi= 24V

Vi= 24V
Io= 2to 10A two modules in
parallel

Vi= 12 to 36V
Io=5A

Vi= 24V Io= 1.2 to 10A

12 24 36 V

0 1.2 V
224V

4.9 5.05 5.2 V

010A

12.5 13.7 A

80 83 %

2.5 A

200 220 mApp

0.3 0.5 mA

100 120 mVpp

0.5 %
1%

0.5 V

16 A

10 %

15 ms
60 µs

100 µs

100 kHz

7.5 °C/W

2/7

CONNECTION DIAGRAM AND MECHANICAL DATA

GS-R1005

Package R.Dimensions in mm (inches).

PIN DESCRIPTION

Pin Function Description

1 GND Input
2 Inhibit

3 + Vin

4,5 + Vout

6 + Sense
7 Sync

8 Parallel
9 -Sense

10,11 GND Output

Return for inputvoltage source. Internally connectedto pin 10,11.
The converter is ON (Enable) when this pin is unconnected or the voltage applied is lower

than 1.2V.The converteris OFF (Inhibit) for a control voltage in the range of 2 to 24V.
DC Input voltage; recommended maximum voltage is 36V.

External capacitor between pin 3 and pin 1 is mandatory; recommended value is
470µF/50V for switching application.

+5V output voltage.
Sensesthe remote loadhigh side. To be connected to pin 4,5 when remote sense is not

used.
Synchronization output. See figures 1,2,3,4. Open when not used.
Parallel output. See figures 1,2,3,4. Open when not used.
Sensesthe remote loadreturn. To be connected to pin 10,11when remote sense is not

used.In parallel configuration, take care to connect all -S pins together (see figures 1,2,3,4).
Return for output current path. Internally connected to pin 1.

3/7