OM7604ST
ISOLATED HERMETIC TO-257AA
ADJUSTABLE VOLTAGE REGULATOR
Three Terminal, Adjustable Voltage, 3.0 Amp
Precision Positive Regulator In A Hermetic
JEDEC TO-257AA Package
FEATURES
•
•
•
•
•
•
Isolated Hermetic Package, JEDEC TO-257AA Outline
Reference Voltages Set To ±2% (±1% Available)
Built-In Thermal Overload Protection
Short Circuit Current Limiting
Product Is Available Screened To MIL-STD-883
Similar To Industry Standard P/N LM150A
DESCRIPTION
These three terminal positive regulators are supplied in a hermetically sealed metal
package whose outline is similar to the industry standard TO-220 plastic package. All
protective features are designed into the circuit, including thermal shutdown, current
limiting and safe-area control. With heat sinking, they can deliver over 3.0 amps of
output current. These units feature 2% initial voltage tolerance, 0.3% load regulation
and 0.01% line regulation.
ABSOLUTE MAXIMUM RATINGS @ 25°C
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +35V
Operating Junction Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55°C to +150°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65° to +150°C
Typical Power/Thermal Characteristics:
Rated Power @ 25°C
T
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25W
T
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3W
Thermal Resistance
q
JC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2°C/W
q
JA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42°C/W
3.3
Note: For ±1% device, add letter "A" in front of part number (e.g. OMA 7604ST).
4 11 R4
Supersedes 1 07 R3
3.3 - 141
OM7604ST
ELECTRICAL CHARACTERISTICS
Test
Reference Voltage
Symbol
V
REF
Conditions
I
OUT
= 10mA
T
A
= 25°C
-55°C T
A
125°C (Note 1) unless otherwise specified
Limits
Min.
1.20
Max.
1.30
V
Unit
3.0V (V
IN -
V
OUT
) 35V, P 30W
10mA I
OUT
3.0A (Note 2)
Line Regulation
(Note 2)
³V
OUT
³V
IN
3.0V (V
IN -
V
OUT
) 35V,
I
OUT
= 10mA, T
J
= 25°C
3.0V (V
IN -
V
OUT
) 35V,
I
OUT
= 10mA
Load Regulation
(Note 2)
³V
OUT
³I
OUT
10mA I
OUT
3.0A,
V
OUT
5.0A, T
J
= 25°C
10mA I
OUT
3.0A,
V
OUT
5.0A
10mA I
OUT
3.0A,
V
OUT
5.0A, T
J
= 25°C
10mA I
OUT
3.0A,
V
OUT
5.0A
Thermal Regulation
Ripple Rejection
(Note 3)
Adjust Pin Current
Adjust Pin
Current Change
Miminum Load Current
Current Limit
I
MIN
I
CL
³V
IN
³V
REF
I
Adj
³I
Adj
10mA I
OUT
3.0A, I
OUT
= 10mA
3.0V (V
IN -
V
OUT
) 35V
(V
IN -
V
OUT
) = 35V
(V
IN -
V
OUT
) 10V
(V
IN -
V
OUT
) = 30V
20ms pulse, T
A
=25°C
V
OUT
= 10V, f = 120Hz
C
ADJ
= 10µF
1.20
1.30
V
0.01
%/V
0.05
%/
17.5
mV
50
mV
0.35
%
1.0
%
0.01
66
%/W
dB
100
5.0
µA
µA
5.0
3.0
0.3
mA
A
A
Notes:
1. Unless otherwise specified, these specifications apply for (V
IN
- V
OUT
) = 5.0V and I
OUT
= 1.5A. Although power
dissipation is internally limited, these characteristics are applicable for power dissipation up to 30W.
2. Regulation is measured at a constant junction temperature using a pulse technique. Changes in output voltage
due to heating effects are covered under the specification for thermal regulation.
3. Guaranteed if not tested to the limits specified.
3.3
3.3 - 142
OM7604ST
TYPICAL PERFORMANCE CHARACTERISTICS
Load Regulation
1.0
Voltage Change (Percent)
0
Output Current (A)
0.1
0.2
0.3
0.4
0.5
-75 -50 -25 0 25 50 75 100 125 150
Temperature (°C)
Dropout Voltage
3
Input-Output Differential (V)
2.5
2
1.5
1
0.5
-75
∆V
OUT
= 100 mV
I
OUT
= 3A
Current Limit
6
65
Adjustment Current (µA)
T
J
= -55°C
T
J
= 25°C
T
J
= 150°C
Adjustment Current
60
55
50
45
40
35
30
-75
-25
25
75
125
4
2
0
0
5 10 15 20 25 30 35
Input-Output Differential (V)
Temperature Stability
Minimum I
OUT
Current (mA)
1.27
Reference Voltage (V)
Temperature (°C)
Minimum Operating Current
5
4
3
2
1
0
T
J
= -55°C
T
J
= 25°C
T
J
= 150°C
I
OUT
= 3 A
I
OUT
= 2 A
I
OUT
= 20 mA
1.26
1.25
1.24
1.23
-50 -25 -0 25 50 75 100 125 150
Temperature (°C)
Ripple Rejection
100
-25
25
75
125
0
5 10 15 20 25 30 35 40
Input-Output Diffential(V)
Ripple Rejection
Temperature (°C)
Ripple Rejection
100
Ripple Rejection (dB)
Ripple Rejection (dB)
80
60
C
ADJ
= 0
C
ADJ
= 10µF
80
Ripple Rejection (dB)
C
ADJ
= 10µF
80
60
C
ADJ
= 0
70
60
50
40
0.1
V
IN
= 15V
V
OUT
= 10V
f = 120Hz
T
CASE
= 25°C
C
ADJ
= 10µF
40
20
0
0
V
IN
- V
OUT
= 5V
V
OUT
= 500mA
f = 120Hz
T
J
= 25°C
40
20
0
10
V
IN
= 15V
V
OUT
= 10V
I
OUT
= 500mA
C
ADJ
= 0
5
10 15 20 25 30 35
Output Voltage (V)
Output Voltage
(Deviation (V)
Output Impedance
100
1k
10k
100k
1M
1
Output Current (A)
Load Transient Response
10
Frequency (Hz)
Output Voltage
Deviation (V)
1.5
1
0.5
0
-0.5
-1
1
0.5
0
0
10
20
30
40
Time (µs)
Line Transient Response
C
ADJ
= 0
C
OUT
= 0
V
OUT
= 10V
I
OUT
= 50mA
T
J
= 25°C
Output Impedance (Ohms)
10
1
0.1
0.01
0.001
0.0001
10
V
IN
= 15V
V
OUT
= 10V
I
OUT
= 500mA
C
ADJ
= 0
C
OUT
= 0
Input Voltage
Change(V)
C
ADJ
= 10µF
C
OUT
= 10µF
Load
Current (A)
C
OUT
= 1µF
C
ADJ
= 10µF
1.5
1
0.5
0
-0.5
-1
-1.5
1.5
1
0.5
0
C
OUT
= 0 C
ADJ
= 0
C
OUT
= 1µF C
ADJ
= 10µF
V
IN
= 15V, V
OUT
= 10V
Preload = 100mA
T
J
= 25°C
3.3
100
1k
10k 100k
1M
0
10
20
30
40
Frequency (Hz)
Time (µs)
3.3 - 143
OM7604ST
TYPICAL APPLICATIONS
1.2 - 2.5V Adjustable Regulator
V
IN
Adj
V
OUT
R1
240
+
C2 +
l
1µF
V
OUT
+
+
Improving Ripple Rejection
V
IN
1µF
V
IN
Adj
R2
365
1%
V
OUT
5V
R1
121
1%
+ C1
10µf*
Adjustable Current Limiter
0.5
V
IN
Adj
V
OUT
1K
500
C1*
1µF
R2
5k
*C1 improves ripple rejection,
X
C
should be small compared to R2.
+ Optional - improves
l
transient response.
*Needed if device is far
from filter capacitors.
R2
+
+V
OUT
= 1.25V 1+ R1
(
)
Precision High Current Reference
V
IN
V
IN
Adj
7
6
LT 1001
4
2
- 2.5V
LT 1009
4.99k
1%
+ 3
2k
15k
1%
V
OUT
+10V
V
IN
V
IN
Adj
V
OUT
Remote Sensing
R
p
(Max Drop 300mV)
5V
2k
7
25
121
6
V
IN
- 2
3 1k
R
L
LT 301A
1
8
100
p
F
+
4
365
Return
+
5µF
-
RET
25
MECHANICAL OUTLINE
.420
.410
.200
.190
.045
.035
.665
.645
.537
.527
.430
.410
.038 MAX.
PIN CONNECTION
Tab
.150
.140
3.3
.750
.500
.005
.035
.025
.100 TYP.
.120 TYP.
1 2 3
Front View
Pin 1: Adjust
Pin 2: V
OUT
Pin 3: V
IN
Tab:
Isolated
NOTES
• Case is metal/hermetically sealed
• Isolated Tab
205 Crawford Street, Leominster, MA 01453 USA (508) 534-5776 FAX (508) 537-4246
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
