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PDF MJLP2951-X Data sheet ( Hoja de datos )
| Número de pieza | MJLP2951-X | |
| Descripción | ADJUSTABLE MICROPOWER VOLTAGE REGULATORS | |
| Fabricantes | National Semiconductor | |
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MJLP2951-X REV 1B1
MICROCIRCUIT DATA SHEET
Original Creation Date: 08/01/95
Last Update Date: 05/19/98
Last Major Revision Date: 01/21/97
ADJUSTABLE MICROPOWER VOLTAGE REGULATORS
General Description
The LP2951 is a micropower voltage regulator with very low quiescent curent (75 uA typ.)
and very low dropout voltage (typ. 40 mV at light loads and 380 mV at 100mA). They are
ideally suited for use in battery-powered systems. Furthermore, the quiescent current of
the LP2951 increases only slightly in dropout, prolonging battery life.
The 8-Lead LP2951 is available in plastic, ceramic dual-in-line, or metal can packages and
offers additional system functions.
One such feature is an error flag output which warns of a low output voltage, often due to
falling batteries 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 (.5% typ.), extremely good load and line regulation
(.05% typ.) and a very low output voltage temperature coefficient, making the part useful
as a low-power voltage reference.
Industry Part Number
LP2951
Prime Die
LP2951
Controlling Document
See Features Page REV C
NS Part Numbers
JL2951BGA*
JL2951BPA**
JL2951S2A***
JL2951SGA****
JL2951SPA*****
Processing
MIL-STD-883, Method 5004
Quality Conformance Inspection
MIL-STD-883, Method 5005
Subgrp Description
1 Static tests at
2 Static tests at
3 Static tests at
4 Dynamic tests at
5 Dynamic tests at
6 Dynamic tests at
7 Functional tests at
8A Functional tests at
8B Functional tests at
9 Switching tests at
10 Switching tests at
11 Switching tests at
Temp ( oC)
+25
+125
-55
+25
+125
-55
+25
+125
-55
+25
+125
-55
1
1 page  
MJLP2951-X REV 1B1
MICROCIRCUIT DATA SHEET
Electrical Characteristics
DC PARAMETERS(Continued)
(The following conditions apply to all the following parameters, unless otherwise specified.)
DC: Vout = 5V (Nominal), Cload = 3.3uF, Vsd = 0.6V, Vin = 6V, Il = -100uA
SYMBOL
Igsc
PARAMETER
CONDITIONS
Ground Current At Vout = 0V, Vin = 6V
Current Limit
Vref
Reference Voltage
Vrline
Vrload
Ifb
Ioh
Vol
Isd
Reference Voltage 2.3V < Vin < 30V
Line Regulation
2.3V < Vin < 30V
Reference Voltage 1.2V < Vout < 29V, Vin = 30V
Output Regulation
1.2V < Vout < 29V, Vin = 30V
Feedback Pin Bias
Current
Error Comparator
Output Leakage
Current
Error Comparator
Output Low
Voltage
Shutdown Pin
Input Current
Vo = 30V
Vin = 4.5V, Vsd = 2V
Vsd = 2.4V
Vsd = 30V
Vsdl
Vsdh
Ilkg
Shutdown Input
Logic Voltage
Shutdown Input
Logic Voltage
Regular Output
Bias Current In
Shutdown
(LOW)
(HIGH)
Vsd = 2V, Vin = 30V, Il = 0mA
NOTES
PIN-
NAME
MIN
1.22
1.20
-1.9
-10
-1.2
-5
1
12
-10
-20
MAX
20
UNIT
mA
SUB-
GROUPS
1
25 mA 2, 3
1.25 V
1
1.26 V
2, 3
1.9 mV 1
10 mV 2, 3
1.2 mV 1
5 mV 2, 3
40 nA 1
60 nA 2, 3
1 uA 1
2 uA 2, 3
250 mV 1
400 mV 2, 3
50 uA 1
100 uA 2, 3
600 uA 1
750 uA 2, 3
0.6 V 1, 2,
3
V 1, 2,
3
10 uA 1
20 uA 2, 3
AC PARAMETERS
(The following conditions apply to all the following parameters, unless otherwise specified.)
AC: Vin = 6V, Cload = 3.3uF, Vsd = 0.6V
Rr Ripple Rejection f = 120Hz, Vin = 0.1Vrms
50
Vnoise
Output Noise
C1 = 1uF
600
C1 = 3.3uF
250
dB 4
uVrms 7
uVrms 7
5
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| PDF Descargar | [ Datasheet MJLP2951-X.PDF ] | |
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