LP2951CM-3.3/NOPB [NSC]
IC VREG FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PDSO8, ROHS COMPLIANT, PLASTIC, SOP-8, Fixed/Adjustable Positive Single Output LDO Regulator;
| 型号： | LP2951CM-3.3/NOPB |
| 厂家： | 
National Semiconductor |
| 描述： | IC VREG FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PDSO8, ROHS COMPLIANT, PLASTIC, SOP-8, Fixed/Adjustable Positive Single Output LDO Regulator 光电二极管 输出元件 调节器 |
| 文件： | 总15页 (文件大小：266K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MICROCIRCUIT DATA SHEET
Original Creation Date: 08/01/95
Last Update Date: 05/19/98
MNLP2951-X REV 1B1
Last Major Revision Date: 11/11/96
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.
Industry Part Number
NS Part Numbers
LP2951
LP2951E/883*
LP2951H/883**
LP2951J/883***
LP2951WG/883****
Prime Die
LP2951
Controlling Document
See Features Page
Processing
Subgrp Description
Temp (oC)
MIL-STD-883, Method 5004
1
Static tests at
+25
2
Static tests at
+125
-55
3
Static tests at
4
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
+25
Quality Conformance Inspection
5
+125
-55
6
MIL-STD-883, Method 5005
7
+25
8A
8B
9
+125
-55
+25
10
11
+125
-55
1
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
METAL CAN
CERDIP
675mW at +25 C
1.0W at +25 C
1.25W at +25 C
1.0W at +25 C
LCC
CERAMIC SOIC
Storage Temperature Range
-65 C to +150 C
-55 C to +125 C
+160 C
Operating Ambient Temperature Range
Absolute Maximum Junction Temperature
Input Supply Voltage
-0.3 to +30V
Feedback Input Voltage
(Note 3, 4)
-1.5 to +30V
-0.3 to +30V
Shutdown Input Voltage
(Note 3)
Error Comparator Out. Voltage
(Note 3)
-0.3 to +30V
260 C
Lead Temperature
(Soldering, 10 seconds)
Thermal Resistance
ThetaJA
METAL CAN
CERDIP
LCC
(Still Air @ 0.5W)
163 C/W
95 C/W
131 C/W
75 C/W
95 C/W
66 C/W
215 C/W
130 C/W
(500LF/Min Air flow @ 0.5W)
(Still Air @ 0.5W)
(500LF/Min Air flow @ 0.5W)
(Still Air @ 0.5W)
(500LF/Min Air flow @ 0.5W)
CERAMIC SOIC (Still Air @ 0.5W)
(500LF/Min Air flow @ 0.5W)
ThetaJC
METAL CAN
CERDIP
51 C/W
21 C/W
24 C/W
24 C/W
LCC
CERAMIC SOIC
Package Weight
(Typical)
TBD
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
MICROCIRCUIT DATA SHEET
MNLP2951-X REV 1B1
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
PIN-
NAME
SUB-
GROUPS
SYMBOL
PARAMETER
CONDITIONS
NOTES
MIN
MAX UNIT
Output Voltage
4.975 5.025 V
1
4.94
-5
5.06
5
V
2, 3
1
Line Regulation
Load Regulation
Dropout Voltage
6V < Vin < 30V
Il = 1mA
mV
mV
mV
mV
mV
mV
mV
mV
mA
mA
mA
mA
uA
uA
uA
uA
uA
uA
uA
uA
mV
mV
mV
mV
mV
mV
mA
mA
-25
-5
25
2, 3
1
100uA < Il < 100mA
100uA < Il < 100mA
Il = 100mA
5
-25
25
2, 3
1
1, 2
1, 2
1, 2
1, 2
450
600
80
2, 3
1
150
15
2, 3
1
Ground Current
Vout = 15V, Il = 100mA
Il = 100mA
0
0
0
0
0
0
0
0
0
0
0
0
20
2, 3
1
12
14
2, 3
1
Vin = 6-30V
30
50
2, 3
1
Quiescent Ground
Current
120
140
120
140
170
200
95
2, 3
1
Il = 10uA, Vout = 15V
Vin = 4.5V
2, 3
1
Dropout Ground
Current
2, 3
1
Comparator Lower
Threshold
1, 3
1, 3
1, 3
1, 3
140
2, 3
1
Comparator Upper
Threshold
40
25
2, 3
1
Thermal
Regulation
Vin = 30V, Il = 50mA, T = 2mS
Vin = 30V, Il = 50mA, T = 10mS
-12.5 12.5
-12.5 12.5
1
ISC Current Limit Vout = 0V
0
0
200
220
1
2, 3
4
MICROCIRCUIT DATA SHEET
MNLP2951-X REV 1B1
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
PIN-
NAME
SUB-
GROUPS
SYMBOL
PARAMETER
CONDITIONS
NOTES
MIN
MAX UNIT
Reference Voltage
1.22
1.20
-1.9
-10
-1.2
-5
1.25
V
1
1.26
1.9
10
V
2, 3
1
Reference Line
Regulation
2.3V < Vin < 30V
2.3V < Vin < 30V
mV
mV
mV
mV
nA
nA
uA
uA
mV
mV
uA
uA
uA
uA
uA
uA
V
2, 3
1
Reference Output Vref < Vout < (Vin-1V), Vin = 30V
Regulation
1.2
5
Vref < Vout < (Vin-1V), Vin = 30V
2, 3
1
Feedback Bias
Current
-40
-60
-1
40
60
2, 3
1
Comparator Off
Leakage
Vo = 30V
1
-2
2
2, 3
1
Comparator Output Vin = 4.5V, Iol = 400uA
Low Voltage
0
250
400
50
0
2, 3
1
Shutdown Input
Current
Vshutdown = 2.4V
0
0
100
600
750
10
2, 3
1
Vshutdown = 30V
0
0
2, 3
1
Output Leakage
Current in
Shutdown
Vshutdown = 1.5V, Vin = 30V
-10
-20
20
2, 3
Shutdown Input
Logic Voltage
(LOW)
1
1
0.6
1, 2,
3
(HIGH)
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.
5
MICROCIRCUIT DATA SHEET
MNLP2951-X REV 1B1
Graphics and Diagrams
GRAPHICS#
DESCRIPTION
05810HRA2
06059HRA2
06146HRA2
06341HRA1
E20ARE
METAL CAN (H), TO-99, 8LD, .200 DIA P.C. (B/I CKT)
CERDIP (J), 8 LEAD (B/I CKT)
LCC (E), TYPE C, 20 TERMINAL(B/I CKT)
CERPACK (W), 10 LEAD (B/I CKT)
LCC (E), TYPE C, 20 TERMINAL(P/P DWG)
METAL CAN (H), TO-99, 8LD, .200 DIA P.C. (P/P DWG)
CERDIP (J), 8 LEAD (P/P DWG)
H08CRF
J08ARL
P000205A
P000206A
P000251B
P000374A
WG10ARC
METAL CAN (H), 8 LEAD (PINOUT)
CERDIP (J), 8 LEAD (PINOUT)
LCC (E), 20 LEAD (PINOUT)
CERAMIC SOIC (WG), 10 LEAD (PINOUT)
CERAMIC SOIC (WG), 10 LEAD (P/P DWG)
See attached graphics following this page.
6
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N
N/C OUTPUT N/C
INPUT N/C
3
2
1
20
19
N/C
N/C
4
5
6
7
8
18
17
16
15
14
SENSE
N/C
FEEDBACK
N/C
SHUTDOWN
N/C
5V TAP
N/C
9
10
11
12
13
N/C
GND
N/C
ERROR
N/C
LP2951E
20 - LEAD LCC
CONNECTION DIAGRAM
TOP VIEW
P000251B
N
MIL/AEROSPACE OPERATIONS
2900 SEMICONDUCTOR DRIVE
SANTA CLARA, CA 95050
INPUT
1
2
3
4
5
10
9
OUTPUT
SENSE
FEEDBACK
VTAP
8
SHUTDOWN
ERROR
7
GND
N/C
N/C
6
LP2951WG
10 - LEAD CERAMIC SOIC
CONNECTION DIAGRAM
TOP VIEW
P000374A
N
MIL/AEROSPACE OPERATIONS
2900 SEMICONDUCTOR DRIVE
SANTA CLARA, CA 95050
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.
7
相关型号：
LP2951CM-3.3X
IC VREG FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PDSO8, PLASTIC, SOP-8, Fixed/Adjustable Positive Single Output LDO Regulator
NSC
LP2951CM/NOPB
IC VREG FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PDSO8, ROHS COMPLIANT, PLASTIC, SOP-8, Fixed/Adjustable Positive Single Output LDO Regulator
NSC
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