SGS Thomson Microelectronics GS-R424, GS-R415, GS-R412, GS-R405S, GS-R405 Datasheet

SWITCHING REGULATOR FAMILY

FEATURES

MTBF in excess of 200,000 hours
4A max output current
46V max input voltage
4V max dro p-o ut vo ltage
Soft start
Remote logic inhibit/enable
Remote output voltage sense
Non-latching overload and short circuit pr otection
Crow-bar outpu t over volta ge prote ct ion

DESCRIPTION

The GS-R400 series is a versati le family of high
current, h igh vo lta ge step-down swi tchin g vo lta ge
regul ators.

The integral heatsink allows a large power handling
capability and it provides also an effective shielding
to minimize EMI.

GS-R400 Family

20W TO 140W STEP-DOWN

SELECTION CHART

Line

(mV/V)

=1 to 3A

Regulation

Load

(mV/A)

Efficiency

Notes

(%)

Fixed output voltage

Reset output
Progr. output voltage
Progr. output voltage and

current. Frequency synchr.

Type

Ordering

Number

GS-R405
GS-R412
GS-R415
GS-R424
GS-R405S
GS-R400V

GS-R400VB

Note: The line regulation is measured at I

The load regulation is measured at Vin=Vo+8V and I
For VO ≥ 36V and Io = 4A an external heatsink or forced ventilation are required.

Output

Voltage

(V)

5.1 ± 2% 9 to 46 25 2 20 70

12.0 ± 4% 16 to 46 50 5 40 80 "

15.0 ± 4% 19 to 46 65 5 60 85 "

24.0 ± 4% 28 to 46 100 6 90 90 "

5.1 ± 2% 9 to 46 25 2 20 70

5.1 to 40 Vo+4 to 46 25 to 100 6 20 to 90 70 to 90

5.1 to 40 Vo+4 to 46 25 to 100 6 20 to 90 70 to 90

Input

Voltage

(V)

out

Output

Ripple

(mVpp)

=1A

out

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

Irt*

T

stg

T

cop

* GS-R405S only

DC Input Voltage

i

Reset Output Sink Current
Storage Temperature Range
Operating Case Temperature Range

48 V

20 mA
– 40 to +105 °C
– 20 to +85 °C

June 1994 1/5

GS-R400 F AMILY

CONNECTION DIAGRAM AND MECHANICAL DATA

Pin 2 GS-R405S only
Pin 5,6,7 GS-R400VB only
Pin 12 GS-R400V/VB only

Dimens io ns in mm

Bottom view

PIN DESCRIPTION

Pin Function Description

Inhibit The module is disabled by a high logic level applied to this pin.

1

Reset Reset output (GS-R405S only).

2

+ Input DC input voltage. Recommended maximum voltage is 46V.

3

Input GND Return for input voltage source.

4

Oscillator

5

Sync Synchronization input. To be connected to the Oscillator output (pin 5) of the master (GS-

6

Current limiting A resistor (≥ 2.2kΩ) connected from this pin to pin 9 sets the current limiting level

7

Output GND Return for output current path.

8

– Sense Senses the remote load return. Mus t be tied to pin 8 when the re mote sensing feature is

9

+ Sense Senses the remote load high side. Must be tied to pin 11 when the remote load sensing

10

+ Output Regulated DC output voltage.

11

Program A resistor (≤ 18kΩ) connected between this pin and pin 10 sets the output voltage

12

100kHz oscillator output. To be connected to Sync (pin 6) input if the unit is a master and
left open if it is a slave (GS-R400VB only). See fig. 5.

R400VB only). See fig. 5.

(GS-R400VB only).

Internally connected to pin 4.

not used. See fig. 1.

feature is not used. See fig. 1.

(GS-R400V and GS-R400VB only).

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