rc4194.pdf

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RC4194
www.fairchildsemi.com
RC4194
Dual Tracking Voltage Regulators
Features
42V
• Load current – E200 mA with 0.04% load regulation
• Internal thermal shutdown at T J = +175AC
• External balance for EV OUT unbalancing
• 3W power dissipations
Description
Block Diagram
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
4194
+V OUT
+V S
E
50 mV and
E
42V.
20K
GND
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.
Comp+
A
Current
Source
H
R SET
Bal
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 = +25AC. 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.
20K
Thermal
Shutdown
R O
Comp–
–V OUT
–V S
3R
R
65-4194-01
Rev. 1.0.0
• Simultaneously adjustable outputs with one resistor
to
E
100
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PRODUCT SPECIFICATION
RC4194
Pin Assignments
-V (Case)
+V
S
+V OUT
1
14
+V
S
NC
2
13
NC
+V OUT
GND
Comp+
3
12
GND
6
5
4
Bal
Comp+
7
8
3
R
SET
4
11
R
SET
2
Comp-
5
10
R
O
9
Bal
1
R
O
NC
6
9
NC
Comp-
-V OUT
-V
S
7
8
-V OUT
65-4194-02
65-4194-03
Absolute Maximum Ratings
(beyond which the device may be damaged) 1
Parameter
Min
Typ
Max
Units
Supply Voltage
RC4194
E
35
V
RM4194
E
45
V
Supply Input to Output Voltage Differential
RC4194
E
35
V
RM4194
E
45
V
Load Current
PDIP
100
mA
CerDIP
150
mA
TO-66 Metal Can
250
mA
P D T A < 50
A
C
PDIP
468
mW
CerDIP
1042
mW
TO-66 Metal Can
2381
mW
Operating Temperature (T j )
RC4194
0
70
A
C
RM4194
-55
125
A
C
Storage Temperature
-65
150
A
C
Junction Temperature
PDIP
125
A
C
CerDIP
175
A C
TO-66 Metal Can
150
A
C
Lead Soldering Temperature (60 seconds)
300
A
C
For T A > 50
A
C Derate at
TO-66 Metal Can
23.81
mW/
A
C
PDIP
6.25
mW/
A
C
CerDIP
8.38
mW/ A C
Note:
1. Functional operation under any of these conditions is NOT implied.
2
S
214489734.017.png 214489734.018.png 214489734.019.png
RC4194
PRODUCT SPECIFICATION
Operating Conditions
Parameter
Min
Typ
Max
Units
JC
Thermal Resistance
CerDIP
60
A
C/W
TO-66 Metal Can
7
A
C/W
JA
Thermal Resistance
PDIP
160
A
C/W
CerDIP
120
A
C/W
TO-66 Metal Can
42
A C/W
Electrical Characteristics
(
5
F
V OUT
F
V MAX ; –V IN
F
-8V; I L =
E
1mA; RM4194: -55
A
C
F
T j
F
+125
A
C; RC4194: 0
A
C
F
T j
F
+70
A
C
unless otherwise specified)
Parameters
Test Conditions
Min
Typ
Max
Units
Line Regulation
S
V S = 0.1 V IN
0.04
0.1
%V OUT
Load Regulation 1
4194K: I L < 200 mA
4194D: I L < 100 mA
E
0.002 0.004 %V OUT /I L
(mA)
V S =
E
(V OUT + 5)V
Output Voltage Drift With
Temperature 2
Positive Output
V OUT =
E
5V
0.002 0.015
%/
A
C
Negative Output
V OUT =
E
5V
0.003 0.015
%/
A
C
Supply Current 3 (Positive)
V MAX , V OUT = 0V,
I L = 0 mA
E
+0.8
+2.5
mA
Supply Current 4 (Negative)
V MAX , V OUT = 0V,
I L = 0 mA
E
-1.8
-4.0
mA
Supply Voltage
RM4194
E
9.5
E
45
V
RC4194
E 9.5
E 35
V
Output Voltage Scale Factor
R SET = 71.5 k
N
, T j = +25
A
C,
2.38
2.5
2.62
k
N
/V
V S =
E
V MAX
Output Voltage Range
RM4194: R SET = 71.5 k
N
,
0.05
E
42
V
I L = 25 mA
RC4194: R SET = 71.5 k
N
,
0.05
E
42
V
I L = 25 mA
Output Voltage Tracking
E 0.4
E 2.0
%
Ripple Rejection
F = 120 Hz, T j = +25
A
C
70
dB
Input-Output Voltage Differential
I L = 50 mA, T j = +25
A
C
3.0
V
Short Circuit Current
V S =
E
30V, T j = +25
A
C
300
mA
Output Noise Voltage
C L = 4.7
H
F, V OUT =
E
15V,
250
H
V RMS
F = 10 Hz to 100 kHz
Internal Thermal Shutdown
175
A
C
Notes:
1. Measured as
À
------------------ 100%
V OUT
V OUT
Z
Â
§
I L
(mA)
Á
Ã
A/V OUT on negative side.
4. The specifications above apply for the given junction temperatures since pulse test conditions are used.
H
A/V OUT on positive side and 100
H
3
E
V S =
V S =
S
2. Output voltage temperature drift guaranteed by design.
3. The current drain will increase by 50
214489734.020.png
PRODUCT SPECIFICATION
RC4194
Typical Performance Characteristics
150
0.06
130
0.05
110
0.04
T j = +125
A
C
90
0.03
70
V OUT =
E
15V
0.02
50
0.01
T j = +25 A C
30
0
10 0
100
1K
10K
100K
-0.01
0 20 40 60 80 100 120 140 160 180 200
I L (mA)
F (Hz)
Figure 1. Ripple Rejection vs. Frequency
Figure 2. Load Regulation vs. Load Current
0.8
0.6
0.4
0.2
0
A
-0.2
B
-0.4
-0.6
C
-60 -40 -20 0 +20 +40 +60 +80 +100 +120+140
T j (
C)
A = % Tracking of V OUT
B = T.C. for Positive Regulator
C = T.C. for Negative Regulator
Figure 3. Output Voltage Tracking vs. Temperature
4
A
214489734.021.png 214489734.022.png
 
214489734.023.png
 
RC4194
PRODUCT SPECIFICATION
Typical Applications
0.01
H
F
+V OUT To Additional
Comparators
4.7
H
F**
+V
S
Comp+
+V OUT
R
+V
A
S
RM4194
Bal
4805
(Typically 15 RC4805s)
-V S
-V S
R
R SET Comp- Gnd
R
0
-V
OUT
B
-V = -5V
To Additional
Comparators
OUT
71.5K
R
0
4.7
H
F
) = 2.5 (-V )
Adjust R for -V = -5V (12.5 k )
R = R = 20 k
O
N
OUT
OUT
N
0.01
H
F
O
N
(See Schematic)
F1
F2
+ V = -V
R = when +V -V
R R
R R
F1
A
65-0205
OUT
OUT
F2
B
A
OUT
OUT
R = when +V -V
For +V = 5 when -V = -5V
R =
R =
B
OUT
OUT
OUT
OUT
A
B
Figure 4. Unbalanced Output Voltage — Comparator Application
2N4905 or equiv.
R *
SC
0.1 F
2N2297 or equiv.
+V OUT
+V
S
47
N
+V
GND
Comp+
+V
S
OUT
60
H
F**
4194
-V S
47
N
-V
-V
-V
S
R
Comp-
R
0
OUT
OUT
SET
60
H
F
0.1 m
R
0
2N2297 or equiv.
71.5K
Load regulation
10 mV @ 2.5A
R *
SC
2N914 or equiv.
R (k ) = 2.5 V
O
N
O
*R =
SC
0.7
I
SC
**Optional usage - Not as critical as -V bypass capacitors.
O
Note: Compensation and bypass capacitor connections should be close as posibe to the 4194
65-0206
Figure 5. High Output Application
5
R (k
H
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