Fairchild Semiconductor RC4194D, RC4194K, RM4194D, RM4194D-883B, RM4194K Datasheet
www.fairchildsemi.com
Features
• Simultaneously adjustable outputs with one resistor
to ±42V
• Load current – ±200 mA with 0.04% load regulation
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 singlepoint regulation. To simplify application the regulators
require a minimum number of external parts.
The device is available in three package types to accommodate 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.
• Internal thermal shutdown at T
J
= +175°C
• External balance for ±V
OUT
unbalancing
• 3W power dissipations
Block Diagram
Comp+
Bal
+V
S
–V
S
–V
OUT
+V
OUT
GND
R
SET
R
O
65-4194-01
Thermal
Shutdown
100µA
Current
Source
Comp–
20K
4194
20K
3R
R
RC4194
Dual Tracking Voltage Regulators
Rev. 1.0.0
PRODUCT SPECIFICATION RC4194
2
Absolute Maximum Ratings
(beyond which the device may be damaged)
1
Note:
1. Functional operation under any of these conditions is NOT implied.
Parameter Min Typ Max Units
Supply Voltage RC4194 ±35 V
RM4194 ±45 V
Supply Input to Output Voltage Differential RC4194 ±35 V
RM4194 ±45 V
Load Current PDIP 100 mA
CerDIP 150 mA
TO-66 Metal Can 250 mA
P
DTA
< 50°C PDIP 468 mW
CerDIP 1042 mW
TO-66 Metal Can 2381 mW
Operating Temperature (Tj) RC4194 0 70 °C
RM4194 -55 125 °C
Storage Temperature -65 150 °C
Junction Temperature PDIP 125 °C
CerDIP 175 °C
TO-66 Metal Can 150 °C
Lead Soldering Temperature (60 seconds) 300 °C
For TA > 50°C Derate at TO-66 Metal Can 23.81 mW/°C
PDIP 6.25 mW/°C
CerDIP 8.38 mW/°C
Pin Assignments
65-4194-02
1
9
2
3
4
5
6
7
8
+V
GND
R
R
-V
OUT
Comp-
Bal
Comp+
+V
OUT
-V (Case)
S
SET
O
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
NC
Comp+
Bal
Comp-
NC
S
+V
OUT
-V
+V
NC
GND
R
R
NC
-V
OUT
S
SET
O
65-4194-03
RC4194 PRODUCT SPECIFICATION
3
Operating Conditions
Electrical Characteristics
(±5 £ V
OUT
£ V
MAX
; –VIN £ -8V; IL = ±1mA; RM4194: -55°C £ Tj £ +125°C; RC4194: 0°C £ Tj £ +70°C
unless otherwise specified)
Notes:
1. Measured as (mA)
2. Output voltage temperature drift guaranteed by design.
3. The current drain will increase by 50mA/V
OUT
on positive side and 100mA/V
OUT
on negative side.
4. The specifications above apply for the given junction temperatures since pulse test conditions are used.
Parameter Min Typ Max Units
q
JC
Thermal Resistance CerDIP 60 °C/W
TO-66 Metal Can 7 °C/W
q
JA
Thermal Resistance PDIP 160 °C/W
CerDIP 120 °C/W
TO-66 Metal Can 42 °C/W
Parameters Test Conditions Min Typ Max Units
Line Regulation DV
S
= 0.1 V
IN
0.04 0.1 %V
OUT
Load Regulation
1
4194K: IL < 200 mA
4194D: IL < 100 mA
±VS = ± (V
OUT
+ 5)V
0.002 0.004 %V
OUT/IL
(mA)
Output Voltage Drift With
Temperature
2
Positive Output V
OUT
= ±5V 0.002 0.015 %/°C
Negative Output V
OUT
= ±5V 0.003 0.015 %/°C
Supply Current3 (Positive) VS = ±V
MAX
, V
OUT
= 0V,
IL = 0 mA
+0.8 +2.5 mA
Supply Current4 (Negative) VS = ±V
MAX
, V
OUT
= 0V,
IL = 0 mA
-1.8 -4.0 mA
Supply Voltage RM4194 ±9.5 ±45 V
RC4194 ±9.5 ±35 V
Output Voltage Scale Factor R
SET
= 71.5 kW, Tj = +25°C,
VS = ±V
MAX
2.38 2.5 2.62 kW/V
Output Voltage Range RM4194: R
SET
= 71.5 kW,
IL = 25 mA
0.05 ±42 V
RC4194: R
SET
= 71.5 kW,
IL = 25 mA
0.05 ±42 V
Output Voltage Tracking ±0.4 ±2.0 %
Ripple Rejection F = 120 Hz, Tj = +25°C70dB
Input-Output Voltage Differential IL = 50 mA, Tj = +25°C 3.0 V
Short Circuit Current VS = ±30V, Tj = +25°C 300 mA
Output Noise Voltage CL = 4.7 mF, V
OUT
= ±15V,
F = 10 Hz to 100 kHz
250 mV
RMS
Internal Thermal Shutdown 175 °C
DV
OUT
V
OUT
------------------
100%´
èø
æö
I
L
§
PRODUCT SPECIFICATION RC4194
4
Typical Performance Characteristics
Figure 1. Ripple Rejection vs. Frequency Figure 2. Load Regulation vs. Load Current
Figure 3. Output Voltage Tracking vs. Temperature
65-0201
Ripple Rejection (dB)
F (Hz)
150
130
110
90
70
50
30
10
0 100 1K 10K 100K
V
OUT
= ±15V
65-0202
Tj = +125¡C
T
j
= +25¡C
0.06
0.05
0.04
0.03
0.02
0.01
0
-0.01
0
20 40 60 80
100
120 140 160
180
200
I
L
(mA)
Load Regulation (% V
OUT
/I
L
)
65-0203
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
T
j
(¡C)
Output Voltage Tracking (% V
OUT
)
A
B
C
-60
-40
-20 0
+20 +40 +60 +80+100
+120+140
A = % Tracking of V
OUT
B = T.C. for Positive Regulator
C = T.C. for Negative Regulator
RC4194 PRODUCT SPECIFICATION
5
Typical Applications
Figure 4. Unbalanced Output Voltage — Comparator Application
Figure 5. High Output Application
0.01µF
S
-V
S
+V
S
+V
-V
S
71.5K
0.01µF
R
SET
Comp-
Gnd
RM4194
Comp+
R
-V
Bal
+V
OUT
OUT
0
0
R
A
R
B
R
4.7µF
4805
4.7µF**
+V
OUT
To Additional
Comparators
(Typically 15 RC4805s)
-V = -5V
To Additional
Comparators
R (k½ ) = 2.5 (-V )
Adjust R for -V = -5V (12.5 k )
R = R = 20 k½ (See Schematic)
+ V = -V
R = when +V -V
R = when +V -V
For +V = 5 when -V = -5V
R =
R =
W
OUT
OUT
O
O
F1
F2
OUT
OUT
A
OUT
OUT
B
OUT
OUT
OUT
OUT
A
B
OUT
R R
R R
F1 A
F2
B
65-0205
65-0206
S
+V
-V
S
0.1 F
m
+V
-V
GND
Comp+
-V
+V
R
Comp-
R
R
60µF
-V
60µF**
2N2297 or equiv.
R *
0.1 F
4194
71.5K
2N914 or equiv.
2N2297 or equiv.
R *
47
47
2N4905 or equiv.
*R =
**Optional usage - Not as critical as -V bypass capacitors.
Note: Compensation and bypass capacitor connections should be close as posibe to the 4194
0.7
I
SC
SC
O
SC
S
S
SET
OUT
OUT
SC
0
OUT
W
+V
OUT
0
m
W
Load regulation
10 mV @ 2.5A
R (k ) = 2.5 V
O
W
O
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