3.5 - 127
3.5
Isolated Hermetic Surface Mount Package
1.0 Amp, Positive Adjustable V oltage
Regulator
4 11 R1
Supersedes 1 05 R0
SURFACE MOUNT POSITIVE ADJUSTABLE
1.0 AMP VOLTAGE REGULATOR
FEATURES
• Hermetic Isolated Surface Mount Package
• Adjustable Output Voltage
• Eliminates Stocking Fixed Voltages
• Built-In Thermal Overload Protection
• Short Circuit Current Limiting
• Product Is Available Hi-Rel Screened
• Electrically Similar To Industry Standard P/N LM117
DESCRIPTION
This three terminal positive regulator is supplied in a hermetically sealed 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 1.0 amp of output current. This unit features output voltages that can be
trimmed using external resistors, from 1.2 volts to 37 volts.
ABSOLUTE MAXIMUM RATINGS
Input to Output Voltage Differential.......................................405 V
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..........................................................17.5W
TA.............................................................3W
Thermal Resistance:
θ
JC
........................................................3.5°C/W
θ
JA
........................................................42°C/W
Lead Temperature at Case (5 sec).................................225°C
OM7635SM
OM7635SM
3.5
ELECTRICAL CHARACTERISTICS -55°C ≤ T
A
≤ 125°C, IL= 8mA (unless otherwise specified)
Parameter Symbol Test Conditions Min. Max. Unit
Reference Voltage V
REF
V
DIFF
= 3.0V, TA= 25°C 1.20 1.30
V
DIFF
= 3.3V • 1.20 1.30 V
V
DIFF
= 40V • 1.20 1.30
Line Regulation R
LINE
3.0V ≤ V
DIFF
≤ 40V, V
out
= V
ref
, TA= 25°C -9 9 mV
(Note 1) 3.3V ≤ V
DIFF
≤ 40V, V
out
= V
ref
• -23 23
Load Regulation R
LOADVDIFF
= 3.0V, 10mA ≤ IL≤ 1.5A, TA= 25°C -15 15
(Note 1) V
DIFF
= 3.3V, 10mA ≤ IL≤ 1.5A • -15 15 mV
V
DIFF
= 40V, 10mA ≤ IL≤ 300mA, TA= 25°C -15 15
V
DIFF
= 40V, 10mA ≤ IL≤ 195mA • -15 15
Thermal Regulation V
RTH
Vin= 14.6V, IL= 1.5A -16 16 mV
P
d
= 20 Watts, t = 20 ms, TA=25°C
Ripple Rejection R
N
f = 120 Hz, V
out
= V
ref
• 66 dB
(Note 2) C
Adj
= 10 µF, I
out
= 100 mA
Adjustment Pin Current I
Adj
V
DIFF
= 3.0V, TA= 25°C 100
V
DIFF
= 3.3V • 100 µA
V
DIFF
= 40V • 100
Adjustment Pin ∆I
Adj
V
DIFF
= 3.0V, 10mA ≤ IL≤ 1.5A, TA= 25°C -5 5
Current Change V
DIFF
= 3.3V, 10mA ≤ IL≤ 1.5A • -5 5
V
DIFF
= 40V, 10mA ≤ IL≤ 300mA, TA= 25°C • -5 5
V
DIFF
= 40V, 10mA ≤ IL≤ 195mA • -5 5 µA
3.0V ≤ V
DIFF
≤ 40V, TA= 25°C -5 5
3.3V ≤ V
DIFF
≤ 40V • -5 5
Miminum Load Current I
Lmin
V
DIFF
= 3.0V, V
OUT
= 1.4V (forced) 5.0
V
DIFF
= 3.3V, V
OUT
= 1.4V (forced) • 5.0 mA
V
DIFF
= 40V, V
OUT
= 1.4V (forced) • 5.0
Current Limit I
CL
V
DIFF
= 15V • 1.5 3.5
(Note 2) V
DIFF
= 40V, TA= 25°C 0.18 1.5 A
Notes:
1. Load and Line Regulation are specified at a constant junction temperature. Pulse testing with low duty cycle is used.
Changes in output voltage due to heating effects must be taken into account separately.
2. If not tested, shall be guaranteed to the specified limits.
3. The • denotes the specifications which apply over the full operating temperature range.
PIN CONNECTION
MECHANICAL OUTLINE
Pin 1: V
OUT
Pin 2: Adjust
Pin 3: V
IN
Case: Isolated
2
3
1
.425H
H
.100H
H
.200H
.020H
H
.350 MIN.H
H
± .020H
.115H
.035 WIDEH
FLAT 3 PLCS.H
.425H
.160H
.080 H
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