LP2981, LP2981A
SLVS521H – JULY 2004 – REVISED DECEMBER 2023
LP2981 100-mA, Low-Dropout Regulator in SOT-23 Package
1 F...
LP2981, LP2981A
SLVS521H – JULY 2004 – REVISED DECEMBER 2023
LP2981 100-mA, Low-Dropout Regulator in SOT-23 Package
1 Features
Input
Voltage (VIN) Range: – Legacy chip: 2.2 V to 16 V – New chip: 2.5 V to 16 V
Output
Voltage (VOUT) Range: 1.2 V to 5.0 V Output
Voltage (VOUT) 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 (VOUT) accuracy over load, and
temperature: ±1% (new chip) Output current: Up to 100 mA Low IQ (new chip): 69 μA at ILOAD = 0 mA Low IQ (new chip): 620 μA at ILOAD = 100 mA Shutdown current over temperature:
– < 1 μA (legacy chip) – ≤ 1.75 μA (new chip) Output current limiting and thermal protection Stable with 2.2-µF ceramic
capacitors (new chip) High PSRR (new chip):
– 75 dB at 1 kHz, 45 dB at 1 MHz Operating junction temperature: –40°C to 125°C Package: 5-pin SOT-23 (DBV)
2 Applications
Electricity meters Micro inverters Server PSU (12-V output) Residential breakers Single & multiaxis servo drives
VIN
VOUT
IN
OUT
CIN GND
LP2981
ON/ OFF
GND
COUT GND
GND
Typical Application Circuit
3 Description
The LP2981 is a fixed-output, low-dropout (LDO)
voltage regulator supporting an input
voltage range from 2.5 V to 16 V (for new chip only) and up to 100 mA of load current. The LP2981 supports an output range of 1.2 V to 5.0 V (new chip).
Additionally, the LP2981 (new chip) has a 1% output accuracy across load and tempe...
