Original Creation Date: 08/01/95
Last Update Date: 05/19/98
Last Major Revision Date: 11/11/96
MNLP2951-X REV 1B1 MICROCIRCUIT DATA SHEET
ADJUSTABLE MICROPOWER VOLTAGE REGULATORS
General Description
The LP2951 is a micropower voltage regulator with very low dropout voltage (typ. 40 mV at
light loads and 380 mV at 100 mA). It is ideally suited for use in battery-powered
systems. Furthermore, the quiescent current of the LP2951 increases only slightly in
dropout, prolonging battery life.
An attractive feature is an error flag output which warns of a low output voltage, often
due to falling battery voltage on the input. It may be used for a power-on reset. A second
feature is the logic-compatible shutdown input which enables the regulator to be switched
on and off. Also, the part may be pin-strapped for a 5V output or programmed from 1.24V to
29V with an external pair of resistors.
Careful design of the LP2951 has minimized all contributions to the error budget. This
includes a tight initial tolerance(0.5% typ.), extremely good load and line regulation
(0.05% typ.) and a very low output voltage temperature coefficient, making the part useful
as a low-power voltage reference.
NS Part Numbers
LP2951E/883*
LP2951H/883**
LP2951J/883***
LP2951WG/883****
Industry Part Number
LP2951
Prime Die
LP2951
Controlling Document
See Features Page
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
MNLP2951-X REV 1B1
Features
- Error flag warns of output dropout.
- Logic-controlled electronic shutdown.
- Output programmable from 1.24 to 29V.
- SMD : 5962-38705M2A*, MGA**, MPA***, MXA****
2
MICROCIRCUIT DATA SHEET
MNLP2951-X REV 1B1
(Absolute Maximum Ratings)
(Note 1)
Power Dissipation 675mW at +25 CMETAL CAN 1.0W at +25 CCERDIP 1.25W at +25 CLCC 1.0W at +25 CCERAMIC SOIC
Storage Temperature Range -65 C to +150 C
Operating Ambient Temperature Range -55 C to +125 C
Absolute Maximum Junction Temperature +160 C
Input Supply Voltage -0.3 to +30V
Feedback Input Voltage
(Note 3, 4) -1.5 to +30V
Shutdown Input Voltage
(Note 3) -0.3 to +30V
Error Comparator Out. Voltage
(Note 3) -0.3 to +30V
Lead Temperature 260 C(Soldering, 10 seconds)
Thermal Resistance
ThetaJA 163 C/W METAL CAN (Still Air @ 0.5W) 95 C/W (500LF/Min Air flow @ 0.5W) 131 C/W CERDIP (Still Air @ 0.5W) 75 C/W (500LF/Min Air flow @ 0.5W) 95 C/W LCC (Still Air @ 0.5W) 66 C/W (500LF/Min Air flow @ 0.5W) 215 C/W CERAMIC SOIC (Still Air @ 0.5W) 130 C/W (500LF/Min Air flow @ 0.5W)
ThetaJC 51 C/W METAL CAN 21 C/W CERDIP 24 C/W LCC 24 C/W CERAMIC SOIC
Package Weight TBD(Typical)
ESD Rating 500V
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. 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: May exceed input supply voltage.
Note 4: When used in dual-supply systems where the output terminal uses loads returned to a
negative supply, the output voltage should be diode-clamped to ground.
3
MNLP2951-X REV 1B1 MICROCIRCUIT DATA SHEET
Electrical Characteristics
DC PARAMETERS
(The following conditions apply to all the following parameters, unless otherwise specified.)
DC: Vin = 6V, Il = 100uA, Cl = 1uF, Vout = 5V, Vshutdown = < 0.8V
SYMBOL PARAMETER CONDITIONS NOTES PIN-
NAME MIN MAX UNIT SUB-
GROUPS
Output Voltage 4.975 5.025 V 1
4.94 5.06 V 2, 3
Line Regulation 6V < Vin < 30V -5 5 mV 1
Il = 1mA -25 25 mV 2, 3
Load Regulation 100uA < Il < 100mA -5 5 mV 1
100uA < Il < 100mA -25 25 mV 2, 3
Dropout Voltage Il = 100mA 1, 2 450 mV 1
1, 2 600 mV 2, 3
1, 2 80 mV 1
1, 2 150 mV 2, 3
Ground Current Vout = 15V, Il = 100mA 0 15 mA 1
0 20 mA 2, 3
Il = 100mA 0 12 mA 1
0 14 mA 2, 3
Vin = 6-30V 0 30 uA 1
0 50 uA 2, 3
Quiescent Ground
Current 0 120 uA 1
0 140 uA 2, 3
Il = 10uA, Vout = 15V 0 120 uA 1
0 140 uA 2, 3
Dropout Ground
Current Vin = 4.5V 0 170 uA 1
0 200 uA 2, 3
Comparator Lower
Threshold 1, 3 95 mV 1
1, 3 140 mV 2, 3
Comparator Upper
Threshold 1, 3 40 mV 1
1, 3 25 mV 2, 3
Thermal
Regulation Vin = 30V, Il = 50mA, T = 2mS -12.5 12.5 mV 1
Vin = 30V, Il = 50mA, T = 10mS -12.5 12.5 mV 1
ISC Current Limit Vout = 0V 0 200 mA 1
0 220 mA 2, 3
4
MNLP2951-X REV 1B1 MICROCIRCUIT DATA SHEET
Electrical Characteristics
DC PARAMETERS(Continued)
(The following conditions apply to all the following parameters, unless otherwise specified.)
DC: Vin = 6V, Il = 100uA, Cl = 1uF, Vout = 5V, Vshutdown = < 0.8V
SYMBOL PARAMETER CONDITIONS NOTES PIN-
NAME MIN MAX UNIT SUB-
GROUPS
Reference Voltage 1.22 1.25 V 1
1.20 1.26 V 2, 3
Reference Line
Regulation 2.3V < Vin < 30V -1.9 1.9 mV 1
2.3V < Vin < 30V -10 10 mV 2, 3
Reference Output
Regulation Vref < Vout < (Vin-1V), Vin = 30V -1.2 1.2 mV 1
Vref < Vout < (Vin-1V), Vin = 30V -5 5 mV 2, 3
Feedback Bias
Current -40 40 nA 1
-60 60 nA 2, 3
Comparator Off
Leakage Vo = 30V -1 1 uA 1
-2 2 uA 2, 3
Comparator Output
Low Voltage Vin = 4.5V, Iol = 400uA 0 250 mV 1
0 400 mV 2, 3
Shutdown Input
Current Vshutdown = 2.4V 0 50 uA 1
0 100 uA 2, 3
Vshutdown = 30V 0 600 uA 1
0 750 uA 2, 3
Output Leakage
Current in
Shutdown
Vshutdown = 1.5V, Vin = 30V -10 10 uA 1
-20 20 uA 2, 3
Shutdown Input
Logic Voltage (LOW) 1 0.6 V 1, 2,
3
(HIGH) 1 2 V 1, 2,
3
Note 1: Functional test only.
Note 2: Dropout voltage is defined as the input to output differential at which the output
drops 100mV below its nominal values measured at 1V differential. At very low values
of programmed output voltage, the minimum input supply voltage of 2V (2.3V over
temperature) must be taken into account.
Note 3: Comparator thresholds are expressed in terms of a voltage differential at the
Feedback terminal below the nominal reference voltage measured at Vin = 6V. To
express these thresholds in terms of output voltage change, multiply by the error
amplifer Gain=Vout/Vin=(R1 + R2)R2. For example, at a programmed output voltage of
5V, the error output is guaranteed to go low when the output drops by 95mV X
5V/1.235V = 384mV. Thresholds remain constant as a percent of Vout as Vout is varied,
with the dropout warning occuring at typically 5% below nominal, 7.5% guaranteed.
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MICROCIRCUIT DATA SHEET
MNLP2951-X REV 1B1
Graphics and Diagrams
GRAPHICS# DESCRIPTION
05810HRA2 METAL CAN (H), TO-99, 8LD, .200 DIA P.C. (B/I CKT)
06059HRA2 CERDIP (J), 8 LEAD (B/I CKT)
06146HRA2 LCC (E), TYPE C, 20 TERMINAL(B/I CKT)
06341HRA1 CERPACK (W), 10 LEAD (B/I CKT)
E20ARE LCC (E), TYPE C, 20 TERMINAL(P/P DWG)
H08CRF METAL CAN (H), TO-99, 8LD, .200 DIA P.C. (P/P DWG)
J08ARL CERDIP (J), 8 LEAD (P/P DWG)
P000205A METAL CAN (H), 8 LEAD (PINOUT)
P000206A CERDIP (J), 8 LEAD (PINOUT)
P000251B LCC (E), 20 LEAD (PINOUT)
P000374A CERAMIC SOIC (WG), 10 LEAD (PINOUT)
WG10ARC CERAMIC SOIC (WG), 10 LEAD (P/P DWG)
See attached graphics following this page.
6
N
N
N
MIL/AEROSPACE OPERATIONS
2900 SEMICONDUCTOR DRIVE
SANTA CLARA, CA 95050
4 18
5
6
7
8 14
9 10 11 12 13
17
16
15
3 2 1 20 19
N/C
SHUTDOWN
N/C
OUTPUT N/C INPUT N/C
FEEDBACK
N/C
5V TAP
N/C
ERROR
GND
N/C
SENSE
LP2951E
20 - LEAD LCC
CONNECTION DIAGRAM
TOP VIEW
P000251B
N/C
N/C N/C
N/C
N/C
N
MIL/AEROSPACE OPERATIONS
2900 SEMICONDUCTOR DRIVE
SANTA CLARA, CA 95050
1 10
2 9
3 8
4 7
5 6
OUTPUT
SENSE
SHUTDOWN
GND
N/C N/C
ERROR
VTAP
FEEDBACK
10 - LEAD CERAMIC SOIC
TOP VIEW
CONNECTION DIAGRAM
P000374A
INPUT
LP2951WG
MICROCIRCUIT DATA SHEET
MNLP2951-X REV 1B1
Revision History
Rev ECN # Rel Date Originator Changes
1B1 M0002864 05/19/98 Barbara Lopez Update MDS: MNLP2951-X Rev. 1A0 to MNLP2951-X Rev.
1B1. Added WG package to SMD number and NSID. Updated
power dissipation to reflect all packages. Updated
thermal resistance to reflect all packages. Updated
ESD rating. Updated Absolute junction temperature.
Added graphics for all packages. Added Package
Weights.
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