MDLM117-H [NSC]

POSITIVE THREE TERMINAL ADJUSTABLE VOLTAGE REGULATOR; 正三端可调稳压器


型号：	MDLM117-H
厂家：	National Semiconductor
描述：	POSITIVE THREE TERMINAL ADJUSTABLE VOLTAGE REGULATOR 正三端可调稳压器稳压器
文件：	总7页 (文件大小：62K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MICROCIRCUIT DATA SHEET

Original Creation Date: 06/27/95

Last Update Date: 09/18/95

MDLM117-H REV 0A0

Last Major Revision Date: 06/27/95

POSITIVE THREE TERMINAL ADJUSTABLE VOLTAGE REGULATOR

General Description

The LM117 adjustable 3-terminal positive voltage regulator is capable of supplying in

excess of 0.5A over a 1.2V to 37V output range. It is exceptionally easy to use and

requires only two external resistors to set the output voltage. Further, both line and

load regulation are better than standard fixed regulators.

In addition to higher performance than fixed regulators, the LM117 offers full overload

protection available only in IC's. Included on the chip are current limit, thermal

overload protection and safe area protection. All overload protection circuitry remains

fully functional even if the adjustment terminal is disconnected.

Normally, no capacitors are needed unless the device is situated more than 6 inches from

the input filter capacitors in which case an input bypass is needed. An optional output

capacitor can be added to improve transient response. The adjustment terminal can be

bypassed to achieve very high ripple rejection ratios which are difficult to achieve with

standard 3-terminal regulators.

Besides replacing fixed regulators, the LM117 is useful in a wide variety of other

applications. Since the regulator is "Floating" and sees only the input-to-output

differential voltage, supplies of several hundred volts can be regulated as long as the

maximum input to output differential is not exceeded, (i.e., avoid short-circuiting the

output).

Also, it makes an especially simple adjustable switching regulator, a programmable output

regulator, or by connecting a fixed resistor between the adjustment pin and output, the

LM117 can be used as a precision current regulator. Supplies with electronic shutdown can

be achieved by clamping the adjustment terminal to ground which programs the output to

1.2V where most loads draw little current.

Industry Part Number

NS Part Numbers

LM117H

LM117H-SMD

Prime Die

LM117H

Controlling Document

DESC.# 7703401XA

Processing

Subgrp Description

Temp (^oC)

MIL-STD-883, Method 5004

Static tests at

+25

Static tests at

+125

-55

Static tests at

Dynamic tests at

Functional tests at

Switching tests at

+25

Quality Conformance Inspection

+125

-55

MIL-STD-883, Method 5005

+25

+125

-55

+25

+125

-55

MICROCIRCUIT DATA SHEET

MDLM117-H REV 0A0

Features

- Guaranteed 0.5A output current.

- Adjustable output down to 1.2V.

- Current limit constant with temperature.

- 80 dB ripple rejection.

- Output is short-circuit protected.

MICROCIRCUIT DATA SHEET

MDLM117-H REV 0A0

(Absolute Maximum Ratings)

(Note 1)

Power Dissipation

Internally Limited

Input-Output Voltage Differential

Maximum Junction Temperature

Storage Temperature Range

+40V, -0.3V

150 C

-65 C to +150 C

300 C

Lead Temperature (Soldering, 10 seconds)

Thermal Resistance

ThetaJA

(Still Air)

186 C/W

64 C/W

(500LF/Min Air flow)

ThetaJC

21 C/W

ESD Tolerance

(Note 2)

3kV

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.

Operating ratings indicate conditions for which the device is intended to be

functional, but do not guarantee specific performance limits. For guaranteed

specifications and test conditions, see the Electrical Characteristics. The

guaranteed specifications apply only for the test conditions listed.

Note 2: Human body model, 1.5K Ohms in series with 100pF.

Recommended Operating Conditions

Operating Temperature Range

-55 C < TA < +125 C

MICROCIRCUIT DATA SHEET

MDLM117-H REV 0A0

Electrical Characteristics

DC PARAMETERS

(The following conditions apply to all the following parameters, unless otherwise specified.)

DC: Il = 8mA

PIN-

NAME

SUB-

SYMBOL

Vref

PARAMETER

CONDITIONS

NOTES

MIN

1.2

MAX UNIT

GROUPS

Reference Voltage Vdiff = 3V

Vdiff = 40V

1.3

1.2

1.3

1, 2,

Vdiff = 3.3V

1.2

-9

1.3

2, 3

Rline

Rload

Line Regulation

Load Regulation

3V < Vdiff < 40V, Vout = Vref

3.3V < Vdiff < 40V, Vout = Vref

Vdiff = 3V, 10mA < Il < 500mA

Vdiff = 40V, 10mA < Il < 150mA

Vdiff = 3.3V, 10mA < Il < 500mA

Vdiff = 40V, 10mA < Il < 100mA

-23

-15

-3.1

3.1

2, 3

Vrth

Iadj

Thermal

Vin = 14.6V, Il = 300mA, Pd = 4W,

t = 20mS

Regulation

Adjustment Pin

Current

Vdiff = 3V

Vdiff = 40V

100

1, 2,

Vdiff = 3.3V

100

2, 3

Delta Iadj Adjustment Pin

Current Change

Vdiff = 3V, 10mA < Il < 500mA

Vdiff = 40V, 10mA < Il < 150mA

3V < Vdiff < 40V

-5

3.3V < Vdiff < 40V

2, 3

Vdiff = 3.3V, 10mA < Il < 500mA

Vdiff = 40V, 10mA < Il < 100mA

Vdiff = 3V, Vout = 1.4V, (forced)

Vdiff = 40V, Vout = 1.4V, (forced)

Ilmin

Icl

Minimum Load

Current

1, 2,

Vdiff = 3.3V, Vout = 1.4V, (forced)

Vdiff = 15V

2, 3

Current Limit

1.65

1, 2,

Vdiff = 40V

.15

.65

AC PARAMETERS

(The following conditions apply to all the following parameters, unless otherwise specified.)

AC: Il = 8mA

Ripple Rejection f = 120Hz, Cadj = 10uF, Vout = Vref

4, 5,

MICROCIRCUIT DATA SHEET

MDLM117-H REV 0A0

Note 1: Group "A" sample only, test at all temp.

MICROCIRCUIT DATA SHEET

MDLM117-H REV 0A0

Graphics and Diagrams

GRAPHICS#

DESCRIPTION

9784HRB1

H03ARD

3LD .200 DIA P.C. METAL CAN PKG (B/I CKT)

3LD .200 DIA P.C. METAL CAN PKG (P/P DWG)

See attached graphics following this page.

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