OM7638SM
SURFACE MOUNT NEGATIVE ADJUSTABLE
3.0 AMP VOLTAGE REGULATOR
Isolated Hermetic Surface Mount Package
3.0 Amp, Negative Adjustable Voltage
Regulator
FEATURES
•
•
•
•
•
•
Isolated Hermetic Surface Mount Package
Reference Voltage Set Internally To ±2% (±1% Available)
Built-In Thermal Overload Protection
Short Circuit Current Limiting
Small Metal Package
Product Is Available Hi-Rel Screened
DESCRIPTION
These three terminal negative regulators are supplied in a hermetic metal surface
mount 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, with
1.0% load regulation and .015% line regulation.
ABSOLUTE MAXIMUM RATINGS
Input to Output Voltage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -35V
Operating Junction Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . - 55°C to + 150°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55°C to + 150°C
Typical Power/Thermal Characteristics:
Rated Power @ 25°C
T
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28W
T
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3W
Thermal Resistance:
θ
JC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2°C/W
θ
JA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42°C/W
Lead Temperature at Case (5 sec)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225°C
3.5
Note: For ±1% device, add letter “A” in front of part number (e.g. OMA7638SM).
4 11 R1
Supersedes 1 06 R0
3.5 - 133
OM7638SM
ELECTRICAL CHARACTERISTICS
Parameter
Reference Voltage
Symbol
V
REF
-55°C ≤ T
A
≤ +125°C (unless otherwise specified)
Min.
-1.238
Max.
-1.262
V
-1.215
-1.285
0.015
%/V
0.04
50
mV
75
1.0
%
1.5
0.02
56
%/W
dB
53
70
dB
60
100
2.0
µA
5.0
5.0
mA
3.0
3.0
6.0
A
3.0
0.5
2.5
A
0.5
1.5
%
µA
Unit
Test Conditions
V
IN
- V
OUT
= 5 V, I
OUT
= 5 mA, T
A
= 25° C
3 V ≤
V
IN
- V
OUT
≤ 35 V
•
•
•
•
Line Regulation
(Note 1)
Load Regulation
(Note 1)
∆V
OUT
∆V
IN
∆V
OUT
∆I
OUT
3 V ≤
V
IN
- V
OUT
≤ 35 V
V
OUT
≤ 5 V, T
A
= 25° C
10 mA ≤ I
OUT
≤ I
MAX.
V
OUT
≥
5.0 V
10 mA ≤ I
OUT
≤ I
MAX.
Thermal Regulation
Ripple Rejection
(Note 2)
-
∆V
IN
∆V
REF
30 ms pulse, T
A
= 25° C
V
OUT
=
-10 V, f = 120 Hz, C
Adj
= 0
V
OUT
=
-10 V, f = 120 Hz, C
Adj
= 10 µF
•
•
•
•
•
•
•
•
•
•
Adjust Pin Current
Adjust Pin Current Change
I
Adj
∆I
Adj
V
DIFF
= 35 V, I
L
= 10 mA
10 mA ≤ I
OUT
≤ I
MAX.
3 V ≤
V
IN
- V
OUT
≤ 35 V
V
IN
- V
OUT
≤ 35 V
V
IN
- V
OUT
≤ 10 V
Minimum Load Current
I
Min
Current Limit
I
Lim
V
IN
- V
OUT
≤ 10 V
V
IN
- V
OUT
= 35 V
Temperature Stability
(Note 2)
Long Term Stability
(Note 2)
∆V
OUT
∆T
∆V
OUT
∆T
-55° C ≤ T
J
≤ +125° C
T
A
= +125° C, t = 1000 hrs
1.0
%
Notes:
1. Line and Load Regulation are measured at a constant junction temperature using a low duty cycle pulse technique.
Although power dissipation is internally limited, regulation is guaranteed up to the maxim
um power dissipation of 30 W.
Power dissipation is determined by the input/output differential voltage and the output curren
t. Guaranteed maximum
power dissipation will not be available over the full input/output voltage range.
2. Guaranteed by design, characterization or correlation to other tested parameters.
3. The • denotes the specifications which apply over the full operating temperature range.
MECHANICAL OUTLINE
.425
PIN CONNECTION
2
3.5
.100
.200
.425
.035 WIDE
FLAT 3 PLCS.
1
3
.350 MIN.
± .020
.115
.160
.020
.080
Pin 1:
Pin 2:
Pin 3:
Case:
V
IN
Adjust
V
OUT
Isolated
Motor Drive Control（Motor Control）
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