LM137HVH-MLS - National Semiconductor

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 regu-

lators are exceptionally easy to apply, requiring only 2 exter-

nal resistors to set the output voltage and 1 output capacitor

for frequency compensation. The circuit design has been op-

timized for excellent regulation and low thermal transients.

Further, the LM137HV series features internal current limit-

ing, thermal shutdown and safe-area compensation, making

them virtually blowout-proof against overloads.

The LM137HV/LM337HV serve a wide variety of applica-

tions 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

nOutput voltage adjustable from −1.2V to −47V

n1.5A output current guaranteed, −55˚C to +150˚C

nLine regulation typically 0.01%/V

nLoad regulation typically 0.3%

nExcellent thermal regulation, 0.002%/W

n77 dB ripple rejection

nExcellent rejection of thermal transients

n50 ppm/˚C temperature coefficient

nTemperature-independent current limit

nInternal thermal overload protection

Product Enhancement tested

nStandard 3-lead transistor package

nOutput 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)

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the 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

=25˚C, 3V ≤|V

−V

OUT

|≤50V, 0.01 0.02 0.01 0.04 %/V

(Note 3) I

=10 mA

Load Regulation T

=25˚C, 10 mA ≤I

OUT

≤I

MAX

0.3 0.5 0.3 1.0 %

Thermal Regulation T

=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

≤I

MAX

25 25µA

3.0V ≤|V

−V

OUT

|≤50V, 4 6 3 6 µA

=25˚

Reference Voltage T

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

3V ≤|V

−V

OUT

|≤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 ≤|V

−V

OUT

|≤50V, (Note 3) 0.02 0.05 0.02 0.07 %/V

=10 mA

Load Regulation 10 mA ≤I

OUT

≤I

MAX

, (Note 3) 0.3 1 0.3 1.5 %

Temperature Stability T

MIN

≤T

MAX

0.6 0.6 %

Minimum Load Current |V

−V

OUT

|≤50V 2.5 5 2.5 10 mA

−V

OUT

|≤10V 1.2 3 1.5 6 mA

Current Limit |V

−V

OUT

|≤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

OUT

|=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

OUT

=25˚C, 10 Hz ≤f≤10 kHz 0.003 0.003 %

Ripple Rejection Ratio V

OUT

=−10V, f =120 Hz 60 60 dB

ADJ

=10 µF 66 77 66 77 dB

Long-Term Stability T

=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 ≤Tj≤+150˚C for the LM137HV, 0˚C ≤Tj≤+125˚C for the LM337HV; VIN−VOUT =5V; and

IOUT =0.1A for the TO-39 package and IOUT =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. IMAX is 1.5A for the TO-3 package and 0.2A for the TO-39 package.

Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are cov-

ered under the specification for thermal regulations. Load regulation is measured on the output pin at a point

⁄

" 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. With an IC regulator, this gradient can be espe-

cially severe since power dissipation is large. Thermal regu-

lation 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 inde-

pendent of electrical regulation or temperature coefficient,

and occurs within 5 ms to 50 ms after a change in power dis-

sipation. Thermal regulation depends on IC layout as well as

electrical design. The thermal regulation of a voltage regula-

tor 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.

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 er-

ror of about 8 mV (0.08%) is additional to the thermal regu-

lation 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, VOUT =−10V

VIN−VOUT =−40V

IL=0A→0.25A→0A

Vertical sensitivity, 5 mV/div

FIGURE 1.

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LM137HV, VOUT =−10V

VIN−VOUT =−40V

IL=0A→0.25A→0A

Horizontal sensitivity, 20 ms/div

FIGURE 2.

TO-3

Metal Can Package

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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 −VOUT 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

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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.