OMNIREL OM7638SM Datasheet
3.5 - 133
3.5
Isolated Hermetic Surface Mount Package
3.0 Amp, Negative Adjustable Voltage
Regulator
4 11 R1
Supersedes 1 06 R0
SURFACE MOUNT NEGATIVE ADJUSTABLE
3.0 AMP 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
TC...........................................................28W
TA.............................................................3W
Thermal Resistance:
θ
JC
........................................................4.2°C/W
θ
JA
........................................................42°C/W
Lead Temperature at Case (5 sec).................................225°C
Note: For ±1% device, add letter “A” in front of part number (e.g. OMA7638SM).
OM7638SM
OM7638SM
3.5
MECHANICAL OUTLINE
.425B
.200B
B
B
B
.100B
.350 MIN.B
.080 B
B
.160B
.020B
± .020B
.035 WIDEB
FLAT 3 PLCS.B
.115B
.425B
ELECTRICAL CHARACTERISTICS -55°C ≤ T
A
≤ +125°C (unless otherwise specified)
Parameter Symbol Test Conditions Min. Max. Unit
Reference Voltage V
REFVIN
- V
OUT
= 5 V, I
OUT
= 5 mA, TA= 25° C -1.238 -1.262
V
3 V ≤ V
IN
- V
OUT
≤ 35 V • -1.215 -1.285
Line Regulation ∆V
OUT
3 V ≤ VIN- V
OUT
≤ 35 V
0.015
%/V
(Note 1) ∆V
IN
• 0.04
Load Regulation ∆V
OUT
V
OUT
≤ 5 V, TA= 25° C 50
mV
(Note 1) ∆I
OUT
10 mA ≤ I
OUT≤IMAX.
• 75
V
OUT
≥ 5.0 V 1.0
%
10 mA ≤ I
OUT≤IMAX.
• 1.5
Thermal Regulation - 30 ms pulse, T
A
= 25° C 0.02 %/W
Ripple Rejection ∆V
IN
V
OUT
= -10 V, f = 120 Hz, C
Adj
= 0
56
dB
(Note 2) ∆V
REF
• 53
V
OUT
= -10 V, f = 120 Hz, C
Adj
= 10 µF
70
dB
• 60
Adjust Pin Current I
Adj
V
DIFF
= 35 V, IL= 10 mA • 100 µA
Adjust Pin Current Change ∆I
Adj
10 mA ≤ I
OUT≤IMAX.
• 2.0
µA
3 V ≤ V
IN
- V
OUT
≤ 35 V • 5.0
Minimum Load Current I
Min
VIN- V
OUT
≤ 35 V • 5.0
mA
V
IN
- V
OUT
≤ 10 V • 3.0
Current Limit I
Lim
VIN- V
OUT
≤ 10 V
3.0 6.0
A
• 3.0
V
IN
- V
OUT
= 35 V
0.5 2.5
A
• 0.5
Temperature Stability ∆V
OUT
-55° C ≤ TJ≤ +125° C
•
1.5 %
(Note 2) ∆T
Long Term Stability ∆V
OUT
TA= +125° C, t = 1000 hrs 1.0 %
(Note 2) ∆T
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 maximum 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.
PIN CONNECTION
Pin 1: V
IN
Pin 2: Adjust
Pin 3: V
OUT
Case: Isolated
2
3
1
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