Texas Instruments LP2981-N Bedienungsanleitung
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LP2981-N 100mA, Low-Dropout Regulator in SOT-23 Package
1 Features
•Input voltage (V
IN
) range:
–Legacy chip: 2.1V to 16V
–New chip: 2.5V to 16V
•Output voltage (V
OUT
) range: 1.2V to 5.0V
•Output voltage (V
OUT
) accuracy:
–±0.75% for A-grade legacy chip
–±1.25% for standard-grade legacy chip
–±0.5% for new chip (A-grade and standard
grade)
•Output voltage (V
OUT
) accuracy over load and
temperature: ±1% (new chip)
•Output current: Up to 100mA
•Low I
Q
(new chip): 69μA at I
LOAD
= 0mA
•Low I
Q
(new chip): 620μA at I
LOAD
= 100mA
•Shutdown current over temperature:
–< 1μA (legacy chip)
–≤ 1.75μA (new chip)
•Output current limiting and thermal protection
•Stable with 2.2µF ceramic capacitors (new chip)
•High PSRR (new chip):
–75dB at 1kHz, 45dB at 1MHz
•Operating junction temperature: –40°C to +125°C
•Package: 5-pin SOT-23 (DBV)
2 Applications
•Electricity meters
•Micro inverters
•Server PSU (12V output)
•Residential breakers
3 Description
The LP2981-N is a fixed-output, low-dropout (LDO)
voltage regulator supporting an input voltage range
from 2.5V to 16V (for new chip only) and up to 100mA
of load current. The LP2981-N supports an output
range of 1.2V to 5.0V (new chip).
Additionally, the LP2981-N (new chip) has a ±1%
output accuracy across load and temperature that
can meet the needs of low-voltage microcontrollers
(MCUs) and processors.
In the new chip, wide bandwidth PSRR performance
is 75dB at 1kHz and 45dB at 1MHz to help attenuate
the switching frequency of an upstream DC/DC
converter and minimize post regulator filtering.
In the new chip, the internal soft-start mechanism
reduces inrush current during start up, thus
minimizing input capacitance. Standard protection
features, such as overcurrent and overtemperature
protection, are included.
Package Information
PART NUMBERPACKAGE
(1)
PACKAGE SIZE
(2)
LP2981-NDBV (SOT-23, 5)2.9mm × 2.8mm
(1)For more information, see the Mechanical, Packaging, and
Orderable Information.
(2)The package size (length × width) is a nominal value and
includes pins, where applicable.
INOUT
ON/
OFF
LP2981-N
GND
C
IN
GND
GND
C
OUT
GND
V
IN
V
OUT
Typical Application Circuit
TEMPERATURE(C)
V
DROP
(mV)
-75-50-250255075100125150
0
50
100
150
200
250
300
I
L
(mA)
0
1
25
100
Dropout Voltage vs Temperature (New Chip)
LP2981-N
SNOS773P – MARCH 2000 – REVISED FEBRUARY 2025
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
Produktspezifikationen
| Marke: | Texas Instruments |
| Kategorie: | Nicht kategorisiert |
| Modell: | LP2981-N |
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