Original Creation Date: 06/27/95
Last Update Date: 08/23/04
Last Major Revision Date: 03/11/96
MNLM117-K REV 1C1 MICROCIRCUIT DATA SHEET
POSITIVE THREE-TERMINAL ADJUSTABLE VOLTAGE REGULATOR
General Description
The LM117 adjustable 3-terminal positive voltage regulator is capable of supplying in
excess of 1.5A 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.
For applications requiring greater output current, see LM150 (3A) and LM138 (5A) data
sheets. For the negative complement, see LM137 data sheet.
NS Part Numbers
LM117K/883
Industry Part Number
LM117K
Prime Die
LM117K
Processing
MIL-STD-883, Method 5004
Quality Conformance Inspection
MIL-STD-883, Method 5005
Subgrp Description Temp ( C)
o
1 Static tests at +25
2 Static tests at +125
3 Static tests at -55
4 Dynamic tests at +25
5 Dynamic tests at +125
6 Dynamic tests at -55
7 Functional tests at +25
8A Functional tests at +125
8B Functional tests at -55
9 Switching tests at +25
10 Switching tests at +125
11 Switching tests at -55
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MICROCIRCUIT DATA SHEET
MNLM117-K REV 1C1
Features
- Guaranteed 1.5A output current
- Adjustable output down to 1.2V
- Current limit constant with temperature
- 80 dB ripple rejection
- Output is short-circuit protected
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MICROCIRCUIT DATA SHEET
MNLM117-K REV 1C1
(Absolute Maximum Ratings)
(Note 1)
Power Dissipation
(Note 2) Internally Limited
Input-Output Voltage Differential +40V, -0.3V
Maximum Junction Temperature 150 C
Storage Temperature Range -65 C to +150 C
Lead Temperature (Soldering, 10 seconds) 300 C
Thermal Resistance
ThetaJA 39 C/W (Still Air) 14 C/W (500LF/Min Air flow)
1.9 C/WThetaJC
ESD Tolerance
(Note 3) 3000V
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. Some performance
characteristics may degrade when the device is not operated under the listed test
conditions.
Note 2: The maximum power dissipation must be derated at elevated temperatures and is
dictated by Tjmax (maximum junction temperature), ThetaJA (package junction to
ambient thermal resistance), and TA (ambient temperature). The maximum allowable
power dissipation at any temperature is Pdmax = (Tjmax - TA)/ThetaJA or the number
given in the Absolute Maximum Ratings, whichever is lower.
Note 3: Human body model, 1.5K Ohms in series with 100pF.
Recommended Operating Conditions
Operating Temperature Range -55 C < TA < +125 C
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MNLM117-K REV 1C1 MICROCIRCUIT DATA SHEET
Electrical Characteristics
DC PARAMETERS
(The following conditions apply to all the following parameters, unless otherwise specified.)
DC: Vdiff = Vin - Vout, Il = 10mA
SYMBOL PARAMETER CONDITIONS NOTES PIN-
NAME MIN MAX UNIT SUB-
GROUPS
Iadj Adjustment Pin
Current Vdiff = 3V 100 uA 1
Vdiff = 3.3V 100 uA 2, 3
Vdiff = 40V 100 uA 1, 2,
3
Iq Minimum Load
Current Vdiff = 3V, Vout = 1.7V 5 mA 1
Vdiff = 3.3V, Vout = 1.7V 5 mA 2, 3
Vdiff = 40V, Vout = 1.7V 5 mA 1, 2,
3
Vref Reference Voltage Vdiff = 3V 1.2 1.3 V 1
Vdiff = 3.3V 1.2 1.3 V 2, 3
Vdiff = 40V 1.2 1.3 V 1, 2,
3
Rline Line Regulation 3V < Vdiff < 40V, Vout = 1.2V -8.9 8.9 mV 1
3.3V < Vdiff < 40V, Vout = 1.2V -22.2 22.2 mV 2, 3
Rload Load Regulation Vdiff = 3V, Il = 10mA to 1.5A -15 15 mV 1
Vdiff = 3.3V, Il = 10mA to 1.5A -15 15 mV 2, 3
Vdiff = 40V, Il = 10mA to 300mA -15 15 mV 1
Vdiff = 40V, Il = 10mA to 195mA -15 15 mV 2, 3
Delta Iadj Adjustment
Current Change Vdiff = 3V, Il = 10mA to 1.5A -5 5 uA 1
Vdiff = 3.3V, Il = 10mA to 1.5A -5 5 uA 2, 3
Vdiff = 40V, Il = 10mA to 300mA -5 5 uA 1
Vdiff = 40V, Il = 10mA to 195mA -5 5 uA 2, 3
3V < Vdiff < 40V -5 5 uA 1
3.3V < Vdiff < 40V -5 5 uA 2, 3
Ios Short Circuit
Current Vdiff = 10V 1.6 3.4 A 1
Theta R Thermal
Regulation TA=25 C, Vdiff=40V, Il=300mA, t=20mS -10.5 10.5 mV 1
Icl Current Limit Vdiff < 15V 1 1.5 A 1, 2,
3
Vdiff = 40V 1 0.3 A 1
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MNLM117-K REV 1C1 MICROCIRCUIT DATA SHEET
Electrical Characteristics
AC PARAMETERS
SYMBOL PARAMETER CONDITIONS NOTES PIN-
NAME MIN MAX UNIT SUB-
GROUPS
Rr Ripple Rejection Vin = +6.25V, Vout = Vref, f = 120Hz,
ei = 1Vrms, Il = 0.5A 2 66 dB 4, 5,
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DC PARAMETERS: DRIFT VALUES
(The following conditions apply to all the following parameters, unless otherwise specified.)
DC: Vdiff = Vin - Vout, Il = 10mA. "Deltas not required on B-Level product. Deltas required for S-Level
product ONLY as specified on Internal Processing Instructions (IPI)."
Iadj Adjustment Pin
Current Vdiff = 40V -10 10 uA 1
Vref Reference Voltage Vdiff = 3V -0.01 0.01 V 1
Note 1: Guaranteed Parameter, not tested.
Note 2: Tested at +25 C; guaranteed, but not tested at +125 C and -55 C.
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MICROCIRCUIT DATA SHEET
MNLM117-K REV 1C1
Graphics and Diagrams
GRAPHICS# DESCRIPTION
K02CRE METAL CAN TO-3, 2LD, LOW PROFILE (P/P DWG)
P000173A METAL CAN (KA), TO-3, 2LD, LOW PROFILE (PINOUT)
See attached graphics following this page.
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MICROCIRCUIT DATA SHEET
MNLM117-K REV 1C1
Revision History
Rev ECN # Rel Date Originator Changes
1C1 M0004399 08/23/04 Rose Malone Updated MDS: MNLM117-K, Rev. 1B0 to 1C1. Added power
dissipation note, and pinout. Updated Thermal
Resistance data and Mkt Drawing,
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