Datasheet 7703404YA Datasheet (NSC)

LM137HV/LM337HV
3-Terminal Adjustable Negative Regulators
(High Voltage)

General Description

The LM137HV/LM337HV are adjustable 3-terminal negative
voltage regulators capable of supplying in excess of −1.5A
over an output voltage range of −1.2V to −47V. These regu­lators are exceptionally easy to apply, requiring only 2 exter­nal resistors to set the output voltage and 1 output capacitor
for frequencycompensation.The circuitdesign has been op­timized for excellent regulation and low thermal transients.
Further, the LM137HV series features internal current limit­ing, thermal shutdown and safe-area compensation, making
them virtually blowout-proof against overloads.

The LM137HV/LM337HV serve a wide variety of applica­tions including local on-card regulation,
programmable-output voltage regulation or precision current
regulation. The LM137HV/LM337HV are ideal complements
to the LM117HV/LM317HV adjustable positive regulators.

Features

n Output voltage adjustable from −1.2V to −47V
n 1.5A output current guaranteed, −55˚C to +150˚C
n Line regulation typically 0.01%/V
n Load regulation typically 0.3

%

n Excellent thermal regulation, 0.002%/W
n 77 dB ripple rejection
n Excellent rejection of thermal transients
n 50 ppm/˚C temperature coefficient
n Temperature-independent current limit
n Internal thermal overload protection
n P

+

Product Enhancement tested

n Standard 3-lead transistor package
n Output short circuit protected

Typical Applications

Adjustable Negative Voltage Regulator

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DS009066-25

†

C1=1 µF solid tantalum or 10 µF aluminum electrolytic required for stability.Output capacitors in the range of 1 µF to 1000 µF of aluminum or tantalum

electrolytic are commonly used to provide improved output impedance and rejection of transients.

*

C2=1 µF solid tantalum is required only if regulator is more than 4" from power-supply filter capacitor.

May 1999

LM137HV/LM337HV 3-Terminal Adjustable Negative Regulators (High Voltage)

© 1999 National Semiconductor Corporation DS009066 www.national.com

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,
please contactthe National Semiconductor Sales Office/
Distributors for availability and specifications.

(Note 4)
Power Dissipation Internally limited

Input— Output Voltage Differential 50V

Operating Junction Temperature Range

LM137HV −55˚C to +150˚C

LM337HV 0˚C to +125˚C
Storage Temperature −65˚C to +150˚C
Lead Temperature

(Soldering, 10 sec.) 300˚
ESD rating is to be determined.

Electrical Characteristics (Note 2)

Parameter Conditions LM137HV LM337HV Units

Min Typ Max Min Typ Max

Line Regulation T

J

=

25˚C, 3V ≤ |V

IN−VOUT

| ≤ 50V, 0.01 0.02 0.01 0.04

%

/V

(Note 3) I

L

=

10 mA

Load Regulation T

J

=

25˚C, 10 mA ≤ I

OUT

≤ I

MAX

0.3 0.5 0.3 1.0

%

Thermal Regulation T

J

=

25˚C, 10 ms Pulse 0.002 0.02 0.003 0.04

%

/W
Adjustment Pin Current 65 100 65 100 µA
Adjustment Pin Current

Change

10 mA ≤ I

L

≤ I

MAX

25 25µA

3.0V ≤ |V

IN−VOUT

| ≤ 50V, 4 6 3 6 µA

T

J

=

25˚

Reference Voltage T

J

=

25˚C, (Note 4) −1.225 −1.250 −1.275 −1.213 −1.250 −1.287 V

3V ≤ |V

IN−VOUT

| ≤ 50V, (Note 4) −1.200 −1.250 −1.300 −1.200 −1.250 −1.300 V

10 mA ≤ I

OUT

≤ I

MAX

,P≤P

MAX

Line Regulation 3V ≤ |VIN−V

OUT

| ≤ 50V, (Note 3) 0.02 0.05 0.02 0.07

%

/V

I

L

=

10 mA

Load Regulation 10 mA ≤ I

OUT

≤ I

MAX

, (Note 3) 0.3 1 0.3 1.5

%

Temperature Stability T

MIN

≤ Tj≤ T

MAX

0.6 0.6

%

Minimum Load Current |V

IN−VOUT

| ≤ 50V 2.5 5 2.5 10 mA

|V

IN−VOUT

| ≤ 10V 1.2 3 1.5 6 mA

Current Limit |V

IN−VOUT

| ≤ 13V
K Package 1.5 2.2 3.2 1.5 2.2 3.5 A
H Package 0.5 0.8 1.6 0.5 0.8 1.8 A
|V

IN−VOUT

|=50V
K Package 0.2 0.4 0.8 0.1 0.4 0.8 A
H Package 0.1 0.17 0.5 0.050 0.17 0.5 A

RMS Output Noise,%of
V

OUT

T

J

=

25˚C, 10 Hz ≤ f ≤ 10 kHz 0.003 0.003

%

Ripple Rejection Ratio V

OUT

=

−10V, f=120 Hz 60 60 dB

C

ADJ

=

10 µF 66 77 66 77 dB

Long-Term Stability T

A

=

125˚C, 1000 Hours 0.3 1 0.3 1

%
Thermal Resistance, Junction H Package 12 15 12 15 ˚C/W
to Case K Package 2.3 3 2.3 3 ˚C/W
Thermal Resistance, Junction

to Ambient

H Package 140 140 ˚C/W
K Package 35 35 ˚C/W

Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits.

Note 2: Unless otherwise specified, these specifications apply: −55˚C ≤ T

j

≤ +150˚C for the LM137HV, 0˚C ≤ Tj≤ +125˚C for the LM337HV; VIN−V

OUT

=

5V; and

I

OUT

=

0.1A for the TO-39 package and I

OUT

=

0.5A for the TO-3 package. Although power dissipation is internally limited, these specifications are applicable for

power dissipations of 2W for the TO-39 and 20W for the TO-3. I

MAX

is 1.5A for the TO-3 package and 0.2A for the TO-39 package.

Note 3: Regulation ismeasured at constantjunction temperature, usingpulse testing with a low duty cycle. Changes in output voltagedue to heatingeffects are cov­ered under the specification for thermal regulations. Load regulation is measured on the output pin at a point

1

⁄8" below the base of the TO-3 and TO-39 packages.

Note 4: Refer to RETS137HVH drawing for LM137HVH or RETS137HVK for LM137HVK military specifications.

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Electrical Characteristics (Note 2) (Continued)

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Thermal Regulation

When power is dissipated in an IC, a temperature gradient
occurs across the IC chip affecting the individual IC circuit
components. Withan IC regulator, this gradientcan be espe­cially 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 coefficient,
and occurs within 5 ms to 50 ms after achange 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

OUT

, per Watt,
within the first 10 ms after a step of power is applied. The
LM137HV’s specification is 0.02%/W, max.

In

Figure 1

, a typical LM137HV’s output drifts only 3 mV (or

0.03%of V

OUT

=

−10V) when a 10W pulse is applied for
10 ms. This performance is thus well inside the specification
limit of 0.02%/W x 10W=0.2%max. When the 10W pulse is
ended, the thermal regulation again showsa3mVstep as
the LM137HV chip cools off. Note that the load regulation er­ror of about 8 mV (0.08%) is additional to the thermal regu­lation error. In

Figure 2

, when the 10W pulse is applied for
100 ms, the output drifts only slightly beyond the drift in the
first 10 ms, and the thermal error stays well within 0.1

%

(10 mV).

Connection Diagram See Physical Dimensions section for further information)

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LM137HV, V

OUT

=

−10V

V

IN−VOUT

=

−40V

I

L

=

0A→0.25A→0A

Vertical sensitivity, 5 mV/div

FIGURE 1.

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LM137HV, V

OUT

=

−10V

V

IN−VOUT

=

−40V

I

L

=

0A→0.25A→0A

Horizontal sensitivity, 20 ms/div

FIGURE 2.

TO-3

Metal Can Package

DS009066-5

Bottom View

Order Number LM137HVK/883, LM137HVK-QMLV, or

SMD

#

7703404

See NS Package Number K02C

Order Number LM337HVK STEEL

See NS Package Number K02A

TO-39

Metal Can Package

DS009066-6

Bottom View

Order Number LM137HVH/883, LM137HVH-QMLV, SMD

#

7703404

or LML337HVH

See NS Package Number H03A

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Typical Applications

Adjustable High Voltage Regulator

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Full output current not available at high input-output voltages

*

The 10 µF capacitors are optional to improve ripple rejection

Current Regulator

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Adjustable Current Regulator

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Negative Regulator with Protection Diodes

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*

When CLis larger than 20 µF, D1 protects the LM137HV in case the input

supply is shorted

**

When C2 is larger than 10 µF and −V

OUT

is larger than −25V, D2

protects the LM137HV is case the output is shorted

High Stability −40V Regulator

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*

Use resistors with good tracking TC<25 ppm/˚C

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Typical Performance Characteristics (H and K-STEEL Package)

Load Regulation

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Current Limit

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Adjustment Current

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Dropout Voltage

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Temperature Stability

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Minimum Operating Current

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Ripple Rejection

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Ripple Rejection

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Ripple Rejection

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Typical Performance Characteristics (H and K-STEEL Package) (Continued)

Output Impedance

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Line Transient Response

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Load Transient Response

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Physical Dimensions inches (millimeters) unless otherwise noted

Metal Can Package (H)

Order Number LM137HVH/883, LM137HVH-QMLV, or LM337HVH

NS Package Number H03A

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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

Metal Can Package (K)

Order Number LM337HVK STEEL

NS Package Number K02A

Metal Can Package (K)

Mil-Aero Products

Order Number LM137HVK/883, LM137HVK-QMLV, or SMD

#

7703404

NS Package Number K02C

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Notes

LIFE SUPPORT POLICY

NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:

1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.

2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.

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LM137HV/LM337HV 3-Terminal Adjustable Negative Regulators (High Voltage)

National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.