www.fairchildsemi.com
RC4194
Dual Tracking Voltage Regulators
Features
• Simultaneously adjustable outputs with one resistor
to
±42V
• Load current –
±200
mA with 0.04% load regulation
• Internal thermal shutdown at T
J
= +175°C
• External balance for
±V
OUT
unbalancing
• 3W power dissipations
Description
The RC/RM4194 are dual polarity tracking regulators
designed to provide balanced or unbalanced positive and
negative output voltages at currents to 200 mA.
A single external resistor adjustment can be used to change
both outputs between the limits of
±50
mV and
±42V.
These devices are designed for local “on-card” regulation,
eliminating distribution problems associated with single-
point regulation. To simplify application the regulators
require a minimum number of external parts.
The device is available in three package types to accommo-
date various power requirements. The K (TO-66) power
package can dissipate up to 3W at T
A
= +25°C. The D
14-pin dual in-line will dissipate up to 1W and the N
14-pin dual in-line will dissipate up to 625 mW.
Block Diagram
4194
+V
OUT
+V
S
20K
GND
Comp+
100µA
Current
Source
R
SET
Bal
20K
Comp–
Thermal
Shutdown
R
O
–V
OUT
–V
S
3R
R
65-4194-01
Rev. 1.0.0