JM38510/11803BXA National Semiconductor, JM38510/11803BXA Datasheet - Page 3

• Manufacturer Part Number: JM38510/11803BXA
• Description: FULL JAN QUAL (LM137H)
• Manufacturer: National Semiconductor

Specifications of JM38510/11803BXA

• Voltage Regulator Type: Linear
• Topology: Standard
• Regulator Output Type: Adjustable
• Polarity Type: Negative
• Number Of Outputs: Single
• Input Voltage (min): -4.2V
• Input Voltage (max): -40V
• Output Voltage: -1.2 to -37V
• Package Type: TO-39
• Output Current: 500mA
• Power Dissipation: 2W
• Load Regulation: 0.5%
• Line Regulation: 0.02%/V
• Operating Temp Range: -55C to 150C
• Operating Temperature Classification: Military
• Pin Count: 3
• Mounting: Through Hole
• Lead Free Status / Rohs Status: Not Compliant

Electrical Characteristics
Note 4: Refer to RETS137H drawing for LM137H or RETS137K drawing for LM137K military specifications.
Schematic Diagram
Thermal Regulation
When power is dissipated in an IC, a temperature gradient
occurs across the IC chip affecting the individual IC circuit
components. With an IC regulator, this gradient can be es-
pecially severe since power dissipation is large. Thermal
regulation is the effect of these temperature gradients on
output voltage (in percentage output change) per Watt of
power change in a specified time. Thermal regulation error is
independent of electrical regulation or temperature coeffi-
cient, and occurs within 5 ms to 50 ms after a change in
power dissipation. Thermal regulation depends on IC layout
as well as electrical design. The thermal regulation of a
voltage regulator is defined as the percentage change of
V
applied. The LM137’s specification is 0.02%/W, max.
OUT
, per Watt, within the first 10 ms after a step of power is
(Note 1) (Continued)
3
LM137, V
V
I
Vertical sensitivity, 5 mV/div
IL
IN
= 0A → 0.25A → 0A
− V
OUT
OUT
= −40V
= −10V
FIGURE 1.
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