LM137HV - National Semiconductor

TL/H/9066

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

January 1995

LM137HV/LM337HV 3-Terminal Adjustable Negative

Regulators (High Voltage)

General Description

The LM137HV/LM337HV are adjustable 3-terminal nega-

tive voltage regulators capable of supplying in excess of

b1.5A over an output voltage range of b1.2V to b47V.

These regulators are exceptionally easy to apply, requiring

only 2 external resistors to set the output voltage and 1

output capacitor for frequency compensation. The circuit

design 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 applica-

tions including local on-card regulation, programmable-out-

put voltage regulation or precision current regulation. The

LM137HV/LM337HV are ideal complements to the

LM117HV/LM317HV adjustable positive regulators.

Features

YOutput voltage adjustable from b1.2V to b47V

Y1.5A output current guaranteed, b55§Ctoa

150§C

YLine regulation typically 0.01%/V

YLoad regulation typically 0.3%

YExcellent thermal regulation, 0.002%/W

Y77 dB ripple rejection

YExcellent rejection of thermal transients

Y50 ppm/§C temperature coefficient

YTemperature-independent current limit

YInternal thermal overload protection

YPaProduct Enhancement tested

YStandard 3-lead transistor package

YOutput short circuit protected

Typical Applications

Adjustable Negative Voltage Regulator

TL/H/9066–1

bVOUT eb

1.25V #1aR2

120XJaÐbIAdj (R2)(

²C1 e1mF solid tantalum or 10 mF aluminum electrolytic

required for stability. Output capacitors in the

range of 1 mF to 1000 mF of aluminum or tantalum

electrolytic are commonly used to provide im-

proved output impedance and rejection of tran-

sients.

*C2 e1mF solid tantalum is required only if regulator is

more than 4×from power-supply filter capacitor.

C1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.

Absolute Maximum Ratings

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales

Office/Distributors for availability and specifications.

(Note 3)

Power Dissipation Internally limited

InputÐOutput Voltage Differential 50V

Operating Junction Temperature Range

LM137HV b55§Ctoa

150§C

LM337HV 0§Ctoa

125§C

Storage Temperature b65§Ctoa

150§C

Lead Temperature (Soldering, 10 sec.) 300§

ESD rating is to be determined.

Electrical Characteristics (Note 1)

Parameter Conditions LM137HV LM337HV Units

Min Typ Max Min Typ Max

Line Regulation TJe25§C, 3V s

VINbVOUT

s50V, 0.01 0.02 0.01 0.04 %/V

(Note 2) ILe10 mA

Load Regulation TJe25§C, 10 mA sIOUT sIMAX 0.3 0.5 0.3 1.0 %

Thermal Regulation TJe25§C, 10 ms Pulse 0.002 0.02 0.003 0.04 %/W

Adjustment Pin Current 65 100 65 100 mA

Adjustment Pin Current Change 10 mA sILsIMAX 25 25mA

3.0V s

VINbVOUT

s50V, 46 36mA

25§

Reference Voltage TJe25§C, (Note 3) b1.225 b1.250 b1.275 b1.213 b1.250 b1.287 V

3V s

VINbVOUT

s50V, (Note 3) b1.200 b1.250 b1.300 b1.200 b1.250 b1.300 V

10 mA sIOUT sIMAX,P

MAX

Line Regulation 3V s

VINbVOUT

s50V, (Note 2) 0.02 0.05 0.02 0.07 %/V

ILe10 mA

Load Regulation 10 mA sIOUT sIMAX, (Note 2) 0.3 1 0.3 1.5 %

Temperature Stability TMIN sTjsTMAX 0.6 0.6 %

Minimum Load Current

VINbVOUT

s50V 2.5 5 2.5 10 mA

VINbVOUT

s10V 1.2 3 1.5 6 mA

Current Limit

VINbVOUT

s13V

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

VINbVOUT

e50V

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 VOUT TJe25§C, 10 Hz sfs10 kHz 0.003 0.003 %

Ripple Rejection Ratio VOUT eb

10V, f e120 Hz 60 60 dB

CADJ e10 mF66776677dB

Long-Term Stability TAe125§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 H Package 140 140 §C/W

to Ambient K Package 35 35 §C/W

Note 1: Unless otherwise specified, these specifications apply: b55§CsTjsa150§C for the LM137HV, 0§CsTjsa125§C for the LM337HV; VINbVOUT e

5V; and IOUT e0.1A for the TO-39 package and IOUT e0.5A 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 2: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are

covered under the specification for thermal regulations. Load regulation is measured on the output pin at a point (/8×below the base of the TO-3 and TO-39

packages.

Note 3: Refer to RETS137HVH drawing for LM137HVH or RETS137HVK for LM137HVK military specifications.

Schematic Diagram

TL/H/9066–2

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 volt-

age regulator is defined as the percentage change of VOUT,

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 VOUT eb

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 e0.2% 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).

TL/H/9066–3

LM137HV, VOUT eb

10V

VINbVOUT eb

40V

ILe0A

0.25A

Vertical sensitivity, 5 mV/div

FIGURE 1

TL/H/9066–4

LM137HV, VOUT eb

10V

VINbVOUT eb

40V

ILe0A

0.25A

Horizontal sensitivity, 20 ms/div

FIGURE 2

Connection Diagram (See Physical Dimensions section for further information)

TO-3

Metal Can Package

TL/H/9066–5

Bottom View

Order Number LM137HVK/883 or SMD Ý7703404

See NS Package Number K02C

Order Number LM337HVK STEEL

See NS Package Number K02A

TO-39

Metal Can Package

TL/H/9066–6

Bottom View

Order Number LM137HVH/883, SMD Ý7703404 or

LML337HVH

See NS Package Number H03A

Typical Applications (Continued)

Adjustable High Voltage Regulator

TL/H/9066–7

Full output current not available

at high input-output voltages

*The 10 mF capacitors are optional to improve ripple rejection

Current Regulator

IOUT eVREF

*0.8XsR1 s120X

TL/H/9066–8

Adjustable Current Regulator

IOUT e#1.5V

R1 Jg15% adjustable

TL/H/9066–9

Negative Regulator with Protection Diodes

TL/H/9066–10

*When CLis larger than 20 mF, D1 protects the

LM137HV in case the input supply is shorted

**When C2 is larger than 10 mF and bVOUT is larger than

b25V, D2 protects the LM137HV is case the output is

shorted

High Stability b40V Regulator

TL/H/9066–11

*Use resistors with good tracking TC k25 ppm/§C

Typical Performance Characteristics (H and K-STEEL Package)

Load Regulation Current Limit Adjustment Current

Dropout Voltage Temperature Stability Minimum Operating Current

Ripple Rejection Ripple Rejection Ripple Rejection

Output Impedance Line Transient Response Load Transient Response

TL/H/9066–12

Physical Dimensions inches (millimeters)

Metal Can Package (H)

Order Number LM137HVH/883 or LM337HVH

NS Package Number H03A

Metal Can Package (K)

Order Number LM337HVK STEEL

NS Package Number K02A

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

Physical Dimensions inches (millimeters) (Continued)

Metal Can Package (K)

Mil-Aero Products

Order Number LM137HVK/883 or SMD Ý7703404

NS Package Number K02C

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 OF NATIONAL

SEMICONDUCTOR CORPORATION. As used herein:

1. Life support devices or systems are devices or 2. A critical component is any component of a life

systems which, (a) are intended for surgical implant support device or system whose failure to perform can

into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life

failure to perform, when properly used in accordance support device or system, or to affect its safety or

with instructions for use provided in the labeling, can effectiveness.

be reasonably expected to result in a significant injury

to the user.

National Semiconductor National Semiconductor National Semiconductor National Semiconductor

Corporation Europe Hong Kong Ltd. Japan Ltd.

1111 West Bardin Road Fax: (

49) 0-180-530 85 86 13th Floor, Straight Block, Tel: 81-043-299-2309

Arlington, TX 76017 Email: cnjwge

tevm2.nsc.com Ocean Centre, 5 Canton Rd. Fax: 81-043-299-2408

Tel: 1(800) 272-9959 Deutsch Tel: (

49) 0-180-530 85 85 Tsimshatsui, Kowloon

Fax: 1(800) 737-7018 English Tel: (

49) 0-180-532 78 32 Hong Kong

Fran3ais Tel: (

49) 0-180-532 93 58 Tel: (852) 2737-1600

Italiano Tel: (

49) 0-180-534 16 80 Fax: (852) 2736-9960

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.