LP2950CZ 3.3 -NS.pdf
(
1157 KB
)
Pobierz
23709664 UNPDF
November 2004
LP2950/LP2951
Series of Adjustable Micropower Voltage Regulators
General Description
The LP2950 and LP2951 are micropower voltage regulators
with very low quiescent current (75µA typ.) and very low
dropout voltage (typ. 40mV at light loads and 380mV at
100mA). They are ideally suited for use in battery-powered
systems. Furthermore, the quiescent current of the LP2950/
LP2951 increases only slightly in dropout, prolonging battery
life.
The LP2950-5.0 is available in the surface-mount D-Pak
package, and in the popular 3-pin TO-92 package for pin-
compatibility with older 5V regulators. The 8-lead LP2951 is
available in plastic, ceramic dual-in-line, LLP, 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, 3V, or 3.3V output (depending on the version), or
programmed from 1.24V to 29V with an external pair of
resistors.
Careful design of the LP2950/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 coef-
ficient, making the part useful as a low-power voltage refer-
ence.
Features
n
5V, 3V, and 3.3V versions available
n
High accuracy output voltage
n
Guaranteed 100mA output current
n
Extremely low quiescent current
n
Low dropout voltage
n
Extremely tight load and line regulation
n
Very low temperature coefficient
n
Use as Regulator or Reference
n
Needs minimum capacitance for stability
n
Current and Thermal Limiting
n
Stable with low-ESR output capacitors (10m
Ω
to 6
Ω
)
LP2951 versions only
n
Error flag warns of output dropout
n
Logic-controlled electronic shutdown
n
Output programmable from 1.24 to 29V
Block Diagram and Typical Applications
LP2950
LP2951
00854625
00854601
© 2004 National Semiconductor Corporation
DS008546
www.national.com
Connection Diagrams
TO-252 (D-Pak)
TO-92 Plastic Package (Z)
00854602
Bottom View
00854670
Dual-In-Line Packages (N, J)
Surface-Mount Package (M, MM)
Front View
8-Lead LLP
00854626
Top View
Metal Can Package (H)
00854671
Pin 4 is fused to center DAP
Top View
00854619
Top View
10-Lead Ceramic Surface-Mount Package (WG)
00854664
Top View
www.national.com
2
Ordering Information
Package Temperature
Range
Part Number
Package Marking
Transport Media NSC Drawing
TO-92 (Z) −40
<
T
J
<
125
LP2950ACZ-3.0
2950A CZ3.0
Bag
Z03A
LP2950CZ-3.0
2950 CZ3.0
Bag
LP2950ACZ-3.3
2950A CZ3.3
Bag
LP2950CZ-3.3
2950 CZ3.3
Bag
LP2950ACZ-5.0
2950A CZ5.0
Bag
LP2950CZ-5.0
2950 CZ5.0
Bag
TO-252
(D-Pak)
−40
<
T
J
<
125
LP2950CDT-3.0
LP2950CDT-3.0
75 Units/Rail
TD03B
LP2950CDTX-3.0
2.5k Units Tape and Reel
LP2950CDT-3.3
LP2950CDT-3.3
75 Units/Rail
LP2950CDTX-3.3
2.5k Units Tape and Reel
LP2950CDT-5.0
LP2950CDT-5.0
75 Units/Rail
LP2950CDTX-5.0
2.5k Units Tape and Reel
N (N-08E) −40
<
T
J
<
125
LP2951ACN-3.0
LP2951ACN-3.0
40 Units/Rail
N08E
LP2951CN-3.0
LP2951CN-3.0
40 Units/Rail
LP2951ACN-3.3
LP2951ACN-3.3
40 Units/Rail
LP2951CN-3.3
LP2951CN-3.3
40 Units/Rail
LP2951ACN
LP2951ACN
40 Units/Rail
LP2951CN
LP2951CN
40 Units/Rail
M (M08A) −40
<
T
J
<
125
LP2951ACM-3.0
2951ACM30*
(where * is die rev letter)
95 Units/Rail
M08A
LP2951ACMX-3.0
2.5k Units Tape and Reel
LP2951CM-3.0
2951CM30*
(where * is die rev letter)
95 Units/Rail
LP2951CMX-3.0
2.5k Units Tape and Reel
LP2951ACM-3.3
2951ACM33*
(where * is die rev letter)
95 Units/Rail
LP2951ACMX-3.3
2.5k Units Tape and Reel
LP2951CM-3.3
2951CM33*
(where * is die rev letter)
95 Units/Rail
LP2951CMX-3.3
2.5k Units Tape and Reel
LP2951ACM
2951ACM*
(where * is die rev letter)
95 Units/Rail
LP2951ACMX
2.5k Units Tape and Reel
LP2951CM
2951CM*
(where * is die rev letter)
95 Units/Rail
LP2951CMX
2.5k Units Tape and Reel
MM
(MUA08A)
−40
<
T
J
<
125 LP2951ACMM-3.0
L0BA
1k Units Tape and Reel
MUA08A
LP2951ACMMX-3.0
3.5k Units Tape and Reel
LP2951CMM-3.0
L0BB
1k Units Tape and Reel
LP2951CMMX-3.0
3.5k Units Tape and Reel
LP2951ACMM-3.3
L0CA
1k Units Tape and Reel
LP2951ACMMX-3.3
3.5k Units Tape and Reel
LP2951CMM-3.3
L0CB
1k Units Tape and Reel
LP2951CMMX-3.3
3.5k Units Tape and Reel
LP2951ACMM
L0DA
1k Units Tape and Reel
LP2951ACMMX
3.5k Units Tape and Reel
LP2951CMM
L0DB
1k Units Tape and Reel
LP2951CMMX
3.5k Units Tape and Reel
J (J08A)
−55
<
T
J
<
150
LP2951J/883
See MIL/AERO Datasheet
40 Units/Rail
J08A
H (H08C) −55
<
T
J
<
150
LP2951H/883
See MIL/AERO Datasheet
Tray
H08C
WG
(WG10A)
−55
<
T
J
<
150
LP2951WG/883
See MIL/AERO Datasheet
Tray
WG10A
3
www.national.com
Ordering Information
(Continued)
Package Temperature
Range
Part Number
Package Marking
Transport Media NSC Drawing
8-lead
LLP
−40
<
T
J
<
125
LP2951ACSD-3.0
51AC30
1k Units Tape and Reel
SDC08A
LP2951ACSDX-3.0
4.5k Units Tape and Reel
LP2951CSD-3.0
51AC30B
1k Units Tape and Reel
LP2951CSDX-3.0
4.5k Units Tape and Reel
LP2951ACSD-3.3
51AC33
1k Units Tape and Reel
LP2951ACSDX-3.3
4.5k Units Tape and Reel
LP2951CSD-3.3
51AC33B
1k Units Tape and Reel
LP2951CSDX-3.3
4.5k Units Tape and Reel
LP2951ACSD
2951AC
1k Units Tape and Reel
LP2951ACSDX
4.5k Units Tape and Reel
LP2951CSD
2951ACB
1k Units Tape and Reel
LP2951CSDX
4.5k Units Tape and Reel
www.national.com
4
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Input Supply Voltage
ESD Rating
Human Body Mode
l(Note 18)
2500V
Operating Ratings
(Note 1)
−0.3 to +30V
Maximum Input Supply Voltage
30V
SHUTDOWN Input Voltage,
Error Comparator Output
Voltage,
(Note 9)
FEEDBACK Input Voltage
−1.5 to +30V
Junction Temperature Range
(T
J
)
(Note 8)
LP2951
−55˚ to +150˚C
(Note 9)
(Note 10)
Power Dissipation
Internally Limited
LP2950AC-XX, LP2950C-XX,
LP2951AC-XX, LP2951C-XX
−40˚ to +125˚C
Junction Temperature (T
J
)
+150˚C
Ambient Storage Temperature
−65˚ to +150˚C
Soldering Dwell Time, Temperature
Wave
Infrared
Vapor Phase
4 seconds, 260˚C
10 seconds, 240˚C
75 seconds, 219˚C
Electrical Characteristics
(Note 2)
LP2951
LP2950AC-XX
LP2950C-XX
Parameter
Conditions
(Note 2)
LP2951AC-XX LP2951C-XX
Tested Tested Design Tested Design
Typ Limit Typ Limit Limit Typ Limit Limit
(Notes
3,
16)
Units
(Note 3)
(Note 4)
(Note 3)
(Note 4)
3V Versions
(Note 17)
Output Voltage
T
J
= 25˚C
3.0
3.015
3.0
3.015
3.0
3.030
V max
2.985
2.985
2.970
V min
−25˚C
≤
T
J
≤
85˚C 3.0
3.0
3.030
3.0
3.045
V max
2.970
2.955
V min
Full Operating
3.0
3.036
3.0
3.036
3.0
3.060
V max
Temperature
Range
2.964
2.964
2.940
V min
Output Voltage
100µA
≤
I
L
≤
3.0
3.045
3.0
3.042
3.0
3.072
V max
100mA
T
J
≤
T
JMAX
2.955
2.958
2.928
V min
3.3V Versions
(Note 17)
Output Voltage
T
J
= 25˚C
3.3
3.317
3.3
3.317
3.3
3.333
V max
3.284
3.284
3.267
V min
−25˚C
≤
T
J
≤
85˚C 3.3
3.3
3.333
3.3
3.350
V max
3.267
3.251
V min
Full Operating
3.3
3.340
3.3
3.340
3.3
3.366
V max
Temperature
Range
3.260
3.260
3.234
V min
Output Voltage
100µA
≤
I
L
≤
3.3
3.350
3.3
3.346
3.3
3.379
V max
100mA
T
J
≤
T
JMAX
3.251
3.254
3.221
V min
5V Versions
(Note 17)
Output Voltage
T
J
= 25˚C
5.0
5.025
5.0
5.025
5.0
5.05
V max
4.975
4.975
4.95
V min
−25˚C
≤
T
J
≤
85˚C 5.0
5.0
5.05
5.0
5.075
V max
4.95
4.925
V min
Full Operating
5.0
5.06
5.0
5.06
5.0
5.1
V max
5
www.national.com
Plik z chomika:
aos.artur2
Inne pliki z tego folderu:
IRU1010-33.pdf
(117 KB)
LP2950CZ 3.3 -NS.pdf
(1157 KB)
LM123,LM223,LM323.pdf
(1347 KB)
LT1038CK.pdf
(499 KB)
LM2940,LM2940C.pdf
(500 KB)
Inne foldery tego chomika:
• Katalogi - Wielka baza układów scalonych
• Katalogi tranzystorów
4xxx
74xxx
7xxx
Zgłoś jeśli
naruszono regulamin