LP2951ACMM National Semiconductor, LP2951ACMM Datasheet
LP2951ACMM
Manufacturer Part Number
LP2951ACMM
Description
LDO VOLTAGE REGULATOR IC
Manufacturer
National Semiconductor
Specifications of LP2951ACMM
Dropout Voltage Vdo
380mV
No. Of Pins
8
Output Current
0.1A
Mounting Type
Surface Mount
Voltage Regulator Type
LDO Linear
Peak Reflow Compatible (260 C)
No
Output Voltage
5V
Output Voltage Max
29V
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
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Part Number:
LP2951ACMM
Manufacturer:
NS/国半
Quantity:
20 000
Company:
Part Number:
LP2951ACMM-3.0
Manufacturer:
NS
Quantity:
169
Company:
Part Number:
LP2951ACMM-3.0
Manufacturer:
NSC
Quantity:
700
Part Number:
LP2951ACMM-3.0
Manufacturer:
NS/国半
Quantity:
20 000
Company:
Part Number:
LP2951ACMM-3.0/NOPB
Manufacturer:
TI
Quantity:
14 900
Company:
Part Number:
LP2951ACMM-3.3
Manufacturer:
NSC
Quantity:
3 800
Part Number:
LP2951ACMM-3.3
Manufacturer:
NS/国半
Quantity:
20 000
Part Number:
LP2951ACMMX
Manufacturer:
TI/德州仪器
Quantity:
20 000
© 2005 National Semiconductor Corporation
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
Block Diagram and Typical Applications
LP2950
DS008546
00854625
(.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 (10mΩ to 6Ω)
LP2951 versions only
n Error flag warns of output dropout
n Logic-controlled electronic shutdown
n Output programmable from 1.24 to 29V
LP2951
www.national.com
May 2005
00854601
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