GS-R4840NV

36 W NEGATIVE SWITCHING REGULATOR

December 1993

1/3

Type

GS-R4840NV

-40 to -60 V

-22 to -60 V

-600 mA

FEATURES

Digital input for voltage selection

Short-circuit protection

Overvoltage protection

Thermal protection

Softstart

Fault signal indication output

High efficiency (>80%)

DESCRIPTION

The GS-R4840NV is a negative input, negative

output switching voltage regulator that provides up

to 36W output power without input-output isolation.

The output voltage is programmable by input logic

signals that allow 64 steps (6 bit) of regulated

output, from -22 to -60V.

°C unless otherwise specified)

Symbol

Parameter

Test Conditions

Min

Typ

Max

Unit

Vi

Input Voltage

Vo = -22 to -60V

Io = -10 to -600mA

-40

-48

-60

V

Vir

Input Ripple Voltage

Vi = -40 to -60V

Io = -600mA

20

mVpp

Vo

Output Voltage

Vi = -40 to -60V

Io = -10 to -600mA

-22

-60

V

Vor

Output Ripple

Voltage

Vo = -22 to -60V

Io = -600mA

4

10

mVpp

Voov

Output Overvoltage

Protection

Vi = -40 to -60V

Io = -10 to -600mA

Vo+5%

Vo+10%

V

Io

Output Current

Vi = -40 to -60V

Vo = -22 to -60V

-10

-600

mA

Iol

Current Limit

Vi = -40 to -60V

Overload Condition

-900

mA

Iosc

Output Average

Short Circ. Current

Vi = -40 to -60V

-80

mA

fs

Switching Frequency

100

kHz

η

Efficiency

Vi = -48V

Io = -600mA

Vo = -48V

80

82

%

Rth

Thermal Resistance

Case to Ambient

4

°C/W

Tcop

Operating Case

Temperature Range

0

+85

°C

Tstg

Storage

Temperature Range

-20

+105

°C