LM137HVK/883 - NATIONAL SEMICONDUCTOR

LM137HV/LM337HV

OBSOLETE

September 22, 2011

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 applications

including local on-card regulation, programmable-output volt-

age regulation or precision current regulation. The LM137HV/

LM337HV are ideal complements to the LM117HV/LM317HV

adjustable positive regulators.

Features

■Output voltage adjustable from −1.2V to −47V

■1.5A output current guaranteed, −55°C to +150°C

■Line regulation typically 0.01%/V

■Load regulation typically 0.3%

■Excellent thermal regulation, 0.002%/W

■77 dB ripple rejection

■Excellent rejection of thermal transients

■50 ppm/°C temperature coefficient

■Temperature-independent current limit

■Internal thermal overload protection

■P+ Product Enhancement tested

■Standard 3-lead transistor package

■Output short circuit protected

Connection Diagram

See Physical Dimensions section for further information)

TO-3

Metal Can Package

906605

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

906606

Bottom View

Order Number LM137HVH/883, LM137HVH-QMLV, SMD #7703404

or LML337HVH

See NS Package Number H03A

9066 Version 6 Revision 3 Print Date/Time: 2011/09/22 13:14:04

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

Typical Applications

Adjustable Negative Voltage Regulator

906601

906625

†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.

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9066 Version 6 Revision 3 Print Date/Time: 2011/09/22 13:14:04

LM137HV/LM337HV

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 TJ = 25°C, 3V ≤ |VIN−VOUT| ≤ 50V, 0.01 0.02 0.01 0.04 %/V

(Note 3) IL = 10 mA

Load Regulation TJ = 25°C, 10 mA ≤ IOUT ≤ IMAX 0.3 0.5 0.3 1.0 %

Thermal Regulation TJ = 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 ≤ IL ≤ IMAX 2 5 2 5 μA

3.0V ≤ |VIN−VOUT| ≤ 50V, 4 6 3 6 μA

TJ = 25°

Reference Voltage TJ = 25°C, (Note 4) −1.225 −1.250 −1.275 −1.213 −1.250 −1.287 V

3V ≤ |VIN−VOUT| ≤ 50V, (Note 4)−1.200 −1.250 −1.300 −1.200 −1.250 −1.300 V

10 mA ≤ IOUT ≤ IMAX, P≤ PMAX

Line Regulation 3V ≤ |VIN−VOUT| ≤ 50V, (Note 3) 0.02 0.05 0.02 0.07 %/V

IL = 10 mA

Load Regulation 10 mA ≤ IOUT ≤ IMAX, (Note 3) 0.3 1 0.3 1.5 %

Temperature Stability TMIN ≤ Tj ≤ TMAX 0.6 0.6 %

Minimum Load Current |VIN−VOUT| ≤ 50V 2.5 5 2.5 10 mA

|VIN−VOUT| ≤ 10V 1.2 3 1.5 6 mA

Current Limit |VIN−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

|VIN−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 VOUT TJ = 25°C, 10 Hz ≤ f ≤ 10 kHz 0.003 0.003 %

Ripple Rejection Ratio VOUT = −10V, f = 120 Hz 60 60 dB

CADJ = 10 μF66 77 66 77 dB

Long-Term Stability TA = 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

covered 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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9066 Version 6 Revision 3 Print Date/Time: 2011/09/22 13:14:04

LM137HV/LM337HV

Schematic Diagram

906602

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9066 Version 6 Revision 3 Print Date/Time: 2011/09/22 13:14:04

LM137HV/LM337HV

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 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.

In Figure 1, a typical LM137HV's output drifts only 3 mV (or

0.03% of VOUT = −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 shows a 3 mV step as the

LM137HV chip cools off. Note that the load regulation error of

about 8 mV (0.08%) is additional to the thermal regulation er-

ror. 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).

906603

LM137HV, VOUT = −10V

VIN−VOUT = −40V

IL = 0A→0.25A→0A

Vertical sensitivity, 5 mV/div

FIGURE 1.

906604

LM137HV, VOUT = −10V

VIN−VOUT = −40V

IL = 0A→0.25A→0A

Horizontal sensitivity, 20 ms/div

FIGURE 2.

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9066 Version 6 Revision 3 Print Date/Time: 2011/09/22 13:14:04

LM137HV/LM337HV

Typical Applications

Adjustable High Voltage Regulator

906607

Full output current not available at high input-output voltages

*The 10 μF capacitors are optional to improve ripple rejection

Current Regulator

906608

Adjustable Current Regulator

906609

Negative Regulator with Protection Diodes

906610

*When CL is 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

906611

*Use resistors with good tracking TC < 25 ppm/°C

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9066 Version 6 Revision 3 Print Date/Time: 2011/09/22 13:14:04

LM137HV/LM337HV

Typical Performance Characteristics (H and K-STEEL Package)

Load Regulation

906613

Current Limit

906614

Adjustment Current

906615

Dropout Voltage

906616

Temperature Stability

906617

Minimum Operating Current

906618

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9066 Version 6 Revision 3 Print Date/Time: 2011/09/22 13:14:04

LM137HV/LM337HV

Ripple Rejection

906619

Ripple Rejection

906620

Ripple Rejection

906621

Output Impedance

906622

Line Transient Response

906623

Load Transient Response

906624

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9066 Version 6 Revision 3 Print Date/Time: 2011/09/22 13:14:04

LM137HV/LM337HV

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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9066 Version 6 Revision 3 Print Date/Time: 2011/09/22 13:14:04

LM137HV/LM337HV

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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9066 Version 6 Revision 3 Print Date/Time: 2011/09/22 13:14:04

LM137HV/LM337HV

Notes

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9066 Version 6 Revision 3 Print Date/Time: 2011/09/22 13:14:04

LM137HV/LM337HV

Notes

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

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9066 Version 6 Revision 3 Print Date/Time: 2011/09/22 13:14:05