LP2951WG [NSC]
ADJUSTABLE MICROPOWER VOLTAGE REGULATORS; 可调微功耗电压稳压器
| 型号： | LP2951WG |
| 厂家： | 
National Semiconductor |
| 描述： | ADJUSTABLE MICROPOWER VOLTAGE REGULATORS |
| 文件： | 总16页 (文件大小：271K) |
| 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
MJLP2951-X REV 1B1
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
NS Part Numbers
LP2951
JL2951BGA*
JL2951BPA**
JL2951S2A***
JL2951SGA****
JL2951SPA*****
Prime Die
LP2951
Controlling Document
See Features Page REV C
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
MJLP2951-X REV 1B1
Features
- SMD : 5962-3870501BGA*, BPA**, S2A***, SGA****, SPA*****.
2
MICROCIRCUIT DATA SHEET
MJLP2951-X REV 1B1
(Absolute Maximum Ratings)
(Note 1)
Power Dissipation
(Note 2)
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
Lead Temperature
(Soldering, 10 seconds)
260 C
Storage Temperature Range
-65 C to +150 C
-55 C to +160 C
-0.3 to +30V
Operating Junction Temp Range
LP2951
Input Supply Voltage
Feedback Input Voltage
(Note 3, 4)
-1.5 to +30V
-0.3 to +30V
-0.3 to +30V
Shutdown Input Voltage
(Note 3)
Error Comparator Out. Voltage
(Note 3)
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 msut 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 sees loads returned to a
negative supply, the output voltage should be diode-clamped to ground.
3
MICROCIRCUIT DATA SHEET
MJLP2951-X REV 1B1
Electrical Characteristics
DC PARAMETERS
(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
PIN-
NAME
SUB-
SYMBOL
PARAMETER
CONDITIONS
Vin = 6V, Il = -100uA
NOTES
MIN
MAX UNIT
GROUPS
Vo
Output Voltage
4.975 5.025 V
1
4.94
-5
5.06
5
V
2, 3
1
Voline
Voload
Vd
Line Regulation
Load Regulation
Dropout Voltage
6V < Vin < 30V, Il = -1mA
6V < Vin < 30V, Il = -1mA
-100uA < Il < -100mA, Vin = 6V
-100uA < Il < -100mA, Vin = 6V
Il = -100mA
mV
mV
mV
mV
mV
mV
mV
mV
mA
mA
uA
uA
uA
uA
mA
mA
uA
uA
uA
uA
mV
-25
-5
25
2, 3
1
5
-25
25
2, 3
1
450
600
80
2, 3
1
Il = -100uA
150
12
2, 3
1
Ig
Ground Current
Il = -100mA, Vin = 6V
14
2, 3
1
Il = -100uA, Vin = 6V
120
140
120
140
15
2, 3
1
Il = -100uA, Vout = 15V, Vin = 30V
Il = -100uA, Vin = 30V, Vout = 15V
2, 3
1
20
2, 3
1
Igdiff
Igdo
Vlt
Ground Current
Change
6V < Vin < 30V, Il = -100uA
6V < Vin < 30V, Il = -100uA
Vin = 4.5V, Il = -100uA
-30
-50
30
50
2, 3
1
Dropout Ground
Current
170
200
0.8
2, 3
Error Comparator Vin = 6V, Il = -100uA
Lower Threshold
Voltage
1
1
0
2
1, 2,
3
Vut
Error Comparator Vin = 6V, Il = -100uA
Upper Threshold
Voltage
30
mV
mV
1, 2,
3
Vrth
Isc
Thermal
Regulation
Vin = 30V, Il = -50mA, 2mS < T < 10mS
Vout = 0V, Vin = 6V
-12.5 12.5
1
Current Limit
200
220
mA
mA
1
2, 3
4
MICROCIRCUIT DATA SHEET
MJLP2951-X REV 1B1
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
PIN-
NAME
SUB-
SYMBOL
Igsc
PARAMETER
CONDITIONS
NOTES
MIN
MAX UNIT
GROUPS
Ground Current At Vout = 0V, Vin = 6V
Current Limit
20
mA
mA
V
1
25
2, 3
1
Vref
Vrline
Vrload
Ifb
Reference Voltage
1.22
1.20
-1.9
-10
1.25
1.26
1.9
10
V
2, 3
1
Reference Voltage 2.3V < Vin < 30V
Line Regulation
mV
mV
mV
mV
nA
nA
uA
uA
mV
mV
uA
uA
uA
uA
V
2.3V < Vin < 30V
2, 3
1
Reference Voltage 1.2V < Vout < 29V, Vin = 30V
Output Regulation
-1.2
-5
1.2
5
1.2V < Vout < 29V, Vin = 30V
2, 3
1
Feedback Pin Bias
Current
40
60
2, 3
1
Ioh
Error Comparator Vo = 30V
Output Leakage
Current
1
2
2, 3
1
Vol
Error Comparator Vin = 4.5V, Vsd = 2V
Output Low
Voltage
250
400
50
2, 3
1
Isd
Shutdown Pin
Input Current
Vsd = 2.4V
Vsd = 30V
100
600
750
0.6
2, 3
1
2, 3
Vsdl
Vsdh
Ilkg
Shutdown Input
Logic Voltage
(LOW)
1
1
1, 2,
3
Shutdown Input
Logic Voltage
(HIGH)
2
V
1, 2,
3
Regular Output
Bias Current In
Shutdown
Vsd = 2V, Vin = 30V, Il = 0mA
-10
-20
10
20
uA
uA
1
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
dB
4
Vnoise
Output Noise
C1 = 1uF
600
250
uVrms 7
uVrms 7
C1 = 3.3uF
5
MICROCIRCUIT DATA SHEET
MJLP2951-X REV 1B1
Electrical Characteristics
DC PARAMETERS: DRIFT VALUES
(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. "Delta calculations performed
on JAN S and QMLV devices at group B, subgroup 5 ONLY."
PIN-
NAME
SUB-
SYMBOL
PARAMETER
CONDITIONS
Il = -100uA, Vin = 6V
NOTES
MIN
MAX UNIT
6.5 uA
GROUPS
Ig
Vref
Ground Current
-6.5
1
Reference Voltage
-0.005 0.0055 V
5
1
Note 1: Parameter tested go-no-go only.
6
MICROCIRCUIT DATA SHEET
MJLP2951-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.
7
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ꢇꢈꢉꢉꢊꢇꢋꢌꢈꢉꢍꢎꢌꢏꢐꢑꢏꢒ
ꢋꢈꢁꢍꢓꢌꢊꢔ
ꢁꢕꢕꢕꢂꢕꢄꢏ
N
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ꢗꢍꢘꢍꢀꢊꢏꢎꢍꢎꢌꢁ
ꢇꢈꢉꢉꢊꢇꢋꢌꢈꢉꢍꢎꢌꢏꢐꢑꢏꢒ
ꢋꢈꢁꢍꢓꢌꢊꢔ
ꢁꢕꢕꢕꢂꢕꢖꢏ
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
MJLP2951-X REV 1B1
Revision History
Rev ECN # Rel Date Originator Changes
1B1
M0002867 05/19/98
Barbara Lopez
Update MDS: MJLP2951-X Rev. 1A0 to MJLP2951-X Rev.
1B1. Updated SMD number to add suffixes. Updated NSID
to add astericks associated with SMD suffix. Updated
power dissipation, lead temperature, junction
temperature, thermal resistance and ESD rating.
Changed note 1 to Absolute note, updated note 2 to
power dissipation note. Added graphics for all
packages. Added Package Weights.
8
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