TI-LM137数据手册_LM137资源-CSDN文库

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TI-LM137是一款由德州仪器（Texas Instruments）制造的可调三端负电压稳压器，专门设计用于提供超过-1.5A的输出电流，其输出电压范围为-1.2V到-37V。这款芯片在应用上极其简便，仅需两个外部电阻来设定输出电压，一个输出电容用于频率补偿。LM137系列优化了电路设计，以实现卓越的电压调节和低热瞬态响应。 LM137的主要特点包括： 1. **输出电压可调**：可以从-1.2V调整到-37V，提供广泛的电压设置范围。 2. **高输出电流**：在-55°C到+150°C的工作温度范围内，保证至少1.5A的输出电流。 3. **线性调节**：通常为0.01%/V，确保了电压对输入电压变化的稳定响应。 4. **负载调节**：典型值为0.3%，即使负载变化，也能保持稳定的输出电压。 5. **出色的热调节**：每度温升的电压漂移仅为0.002%，提高了系统的温度稳定性。 6. **77dB的纹波抑制比**：有效地滤除电源中的噪声，确保输出电压的纯净。 7. **良好的热瞬态拒绝**：对温度变化有很好的抑制能力，降低因环境温度变化对系统的影响。 8. **50ppm/°C的温度系数**：输出电压随温度的变化非常小，提高了系统的精度。 9. **内部电流限制**：防止过载导致的器件损坏。 10. **内置热过载保护**：当芯片温度过高时，会自动关闭，保护器件安全。 11. **独立于温度的电流限制**：无论温度如何，都能保持恒定的电流限制值。 12. **TO-3、TO-220、TO-39和SOT-223封装**：提供不同功率和安装需求的选择。 13. **短路保护**：输出端可承受短路条件，不会立即损坏。 **应用场合**： LM137常用于本地卡上调节电压、可编程输出电压调节或精密电流调节等应用。与LM117/LM317可调正电压稳压器相配合，构成完整的正负电压供电解决方案。在实际应用中，为了保证电路的稳定性和性能，常常需要配置一个1μF的固体钽电容或10μF的铝电解电容作为C1，用于稳定性；如果稳压器距离电源滤波电容超过4英寸，还需要一个1μF的固体钽电容作为C2。输出电容一般选用1μF到1000μF的铝或钽电解电容，以改善输出阻抗和滤波效果。 TI-LM137是一个功能强大、易于使用的负电压稳压器，适用于需要精确电压控制和高电流输出的多种电子设备。其内置保护机制和优秀的电气特性确保了在各种工作条件下都能提供可靠的电压调节服务。

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LM137/LM337

3-Terminal Adjustable Negative Regulators

General Description

The LM137/LM337 are adjustable 3-terminal negative volt-

age regulators capable of supplying in excess of −1.5A over

an output voltage range of −1.2V to −37V. 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 opti-

mized for excellent regulation and low thermal transients.

Further, the LM137 series features internal current limiting,

thermal shutdown and safe-area compensation, making

them virtually blowout-proof against overloads.

The LM137/LM337 serve a wide variety of applications in-

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

age regulation or precision current regulation. The LM137/

LM337 are ideal complements to the LM117/LM317

adjustable positive regulators.

Features

n Output voltage adjustable from −1.2V to −37V

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 is short circuit protected

LM137 Series Packages and Power Capability

Rated Design

Device Package Power Load

Dissipation Current

LM137/337 TO-3 (K) 20W 1.5A

TO-39 (H) 2W 0.5A

LM337 TO-220 (T) 15W 1.5A

LM337 SOT-223

(MP)

2W 1A

Typical Applications

Adjustable Negative Voltage Regulator

00906701

Full output current not available at high input-output voltages

†

C1=1µFsolid tantalum or 10 µF aluminum electrolytic required for

stability

*C2=1µFsolid tantalum is required only if regulator is more than 4" from

power-supply filter capacitor

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

Comparison between SOT-223 and

D-Pak (TO-252) Packages

00906731

Scale 1:1

November 2004

LM137/LM337 3-Terminal Adjustable Negative Regulators

Absolute Maximum Ratings (Notes 1,

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Power Dissipation Internally Limited

Input-Output Voltage Differential 40V

Operating Junction Temperature

Range

LM137 −55˚C to +150˚C

LM337 0˚C to +125˚C

LM337I −40˚C to +125˚C

Storage Temperature −65˚C to +150˚C

Lead Temperature (Soldering, 10 sec.) 300˚C

Plastic Package (Soldering, 4 sec.) 260˚C

ESD Rating 2k Volts

Electrical Characteristics (Note 1)

Parameter Conditions LM137 LM337 Units

Min Typ Max Min Typ Max

Line Regulation T

= 25˚C, 3V ≤ |V

−V

OUT

| ≤ 40V 0.01 0.02 0.01 0.04 %/V

(Note 2) I

=10mA

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 Charge 10 mA ≤ I

≤ I

MAX

25 25µA

3.0V ≤ |V

−V

OUT

| ≤ 40V,

= 25˚C

Reference Voltage T

= 25˚C (Note 3) −1.225 −1.250 −1.275 −1.213 −1.250 −1.287 V

3V ≤ |V

−V

OUT

| ≤ 40V, (Note 3) −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

| ≤ 40V, (Note 2) 0.02 0.05 0.02 0.07 %/V

Load Regulation 10 mA ≤ I

OUT

≤ I

MAX

, (Note 2) 0.3 1 0.3 1.5 %

Temperature Stability T

MIN

≤ T

MAX

0.6 0.6 %

Minimum Load Current |V

−V

OUT

| ≤ 40V 2.5 5 2.5 10 mA

−V

OUT

| ≤ 10V 1.2 3 1.5 6 mA

Current Limit |V

−V

OUT

| ≤ 15V

K, MP and T Package 1.5 2.2 3.5 1.5 2.2 3.7 A

H Package 0.5 0.8 1.8 0.5 0.8 1.9 A

−V

OUT

| = 40V, T

= 25˚C

K, MP and T Package 0.24 0.4 0.15 0.4 A

H Package 0.15 0.17 0.10 0.17 A

RMS Output Noise, % of V

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

=10µF 66 77 66 77 dB

Long-Term Stability T

= 125˚C, 1000 Hours 0.3 1 0.3 1 %

Thermal Resistance, Junction to

Case

H Package 12 15 12 15 ˚C/W

K Package 2.3 3 2.3 3 ˚C/W

T Package 4 ˚C/W

Thermal Resistance, Junction to

Ambient (No Heat Sink)

H Package 140 140 ˚C/W

K Package 35 35 ˚C/W

T Package

MP Package

170

˚C/W

Note 1: Unless otherwise specified, these specifications apply −55˚C ≤ T

≤ +150˚C for the LM137, 0˚C ≤ T

≤ +125˚C for the LM337; V

−V

OUT

= 5V; and I

OUT

= 0.1A for the TO-39 package and I

OUT

= 0.5A for the TO-3, SOT-223 and TO-220 packages. Although power dissipation is internally limited, these specifications

are applicable for power dissipations of 2W for the TO-39 and SOT-223 (see Application Hints), and 20W for the TO-3, and TO-220. I

MAX

is 1.5A for the TO-3,

SOT-223 and TO-220 packages, 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