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MICROCIRCUIT DATA SHEET MDLM117-K REV 0A0
Original Creation Date: 06/27/95 Last Update Date: 09/18/95 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 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 a 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.
Industry Part Number
LM117K
NS Part Numbers
LM117K-SMD
Prime Die
LM117K
Controlling Document
DESC.# 7703401YA
Processing
MIL-STD-883, Method 5004
Subgrp Description
1 2 3 4 5 6 7 8A 8B 9 10 11 Static tests at Static tests at Static tests at Dynamic tests at Dynamic tests at Dynamic tests at Functional tests at Functional tests at Functional tests at Switching tests at Switching tests at Switching tests at
Temp ( oC)
+25 +125 -55 +25 +125 -55 +25 +125 -55 +25 +125 -55
Quality Conformance Inspection
MIL-STD-883, Method 5005
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MDLM117-K REV 0A0
MICROCIRCUIT DATA SHEET
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
(Absolute Maximum Ratings)
(Note 1) Power Dissipation 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 (Still Air) (500LF/Min Air flow) ThetaJC ESD Tolerance (Note 2)
38 C/W TBD 3 C/W
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. Human body model, 1.5K Ohms in series with 100pF.
Note 2:
Recommended Operating Conditions
Operating Temperature Range -55 C < TA < +125 C
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MICROCIRCUIT DATA SHEET
Electrical Characteristics
DC PARAMETERS
(The following conditions apply to all the following parameters, unless otherwise specified.) DC: Il = 8mA SYMBOL Vref PARAMETER Reference Voltage Vdiff = 3V Vin = 40V Vdiff = 3.3V Rline Line Regulation 3V < Vdiff < 40V, Vout = Vref 3.3V < Vdiff < 40V, Vout = Vref Rload Load Regulation Vdiff = 3V, 10mA < Il < 1.5A Vdiff = 40V, 10mA < Il < 300mA Vdiff = 3.3V, 10mA < Il < 1.5A Vdiff = 40V, 10mA < Il < 195mA Vrth Iadj Thermal Regulation Adjustment Pin Current Vin = 14.6V, Il = 1.5A, Pd = 20W, t = 20mS Vdiff = 3V Vdiff = 40V Vdiff = 3.3V Delta Iadj Adjustment Pin Current Change Vdiff = 3V, 10mA < Il < 1.5A Vdiff = 40V, 10mA < Il < 300mA 3V < Vdiff < 40V Vdiff = 3.3V, 10mA < Il < 1.5A Vdiff = 40V, 10mA < Il < 195mA 3.3V < Vdiff < 40V Ilmin Minimum Load Current Vdiff = 3V, Vout = 1.4V, (forced) Vdiff = 40V, Vout = 1.4V, (forced) Vdiff = 3.3V, Vout = 1.4V, (forced) Icl Current Limit Vdiff = 15V Vdiff = 40V 1.5 .18 -5 -5 -5 -5 -5 -5 CONDITIONS NOTES PINNAME MIN 1.2 1.2 1.2 -9 -23 -15 -15 -15 -15 -16 MAX 1.3 1.3 1.3 9 23 15 15 15 15 16 100 100 100 5 5 5 5 5 5 5 5 5 3.5 1.5 UNIT V V V mV mV mV mV mV mV mV uA uA uA uA uA uA uA uA uA mA mA mA A A SUBGROUPS 1 1, 2, 3 2, 3 1 2, 3 1 1 2, 3 2, 3 1 1 1, 2, 3 2, 3 1 1 1 2, 3 2, 3 2, 3 1 1, 2, 3 2, 3 1, 2, 3 1
AC PARAMETERS
(The following conditions apply to all the following parameters, unless otherwise specified.) AC: Il = 8mA Rn Ripple Rejection f = 120Hz, Cadj = 10uF, Vout = Vref 1 66 dB 4, 5, 6
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MICROCIRCUIT DATA SHEET
Note 1:
Group "A" sample only, test at all temp.
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MICROCIRCUIT DATA SHEET
Graphics and Diagrams
GRAPHICS# 9757HRE2 K02CRD DESCRIPTION METAL CAN (KA), TO-3, 2LD, LOW PROFILE (B/I CKT)
METAL CAN (KA), TO-3, 2LD,LOW PROFILE (P/P DWG)
See attached graphics following this page.
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