LP5907 — Datasheet Summary, Specs & Alternatives

01 — Overview

This Texas Instruments datasheet covers the LP5907, a 250mA low-noise, low-Iq LDO regulator. It is designed for RF and analog circuits requiring high PSRR and low transient response without needing a noise bypass capacitor. Key parameters include an input voltage range of 2.2V to 5.5V, output voltages from 1.2V to 4.5V in 25mV steps, and ultra-low output noise under 6.5µVRMS at 1kHz. The device features a typical quiescent current of 12µA when enabled, excellent power supply rejection ratio of 82dB at 1kHz, and a dropout voltage of only 120mV. It operates across junction temperatures from -40°C to 125°C with thermal overload protection.

02 — Key specifications

Datasheet parameters

Parameter	Min	Typ	Max	Conditions
quiescent current	—	12 µA	25 µA	VEN = 1.2V, IOUT = 0mA
output voltage	1.2 V	—	4.5 V
output current	0 A	—	250 mA	See(4)
supply voltage range	2.2 V	—	5.5 V	TA = 25°C
operating temperature	-40 °C	—	125 °C
standby current	—	12 µA	—
psrr	—	90 dB	—	f = 100Hz, IOUT = 20mA
dropout voltage	—	120 mV	200 mV	IOUT = 250mA (DSBGA package)
output noise voltage	—	10 µV	—	BW = 10Hz to 100kHz; IOUT = 1mA
output count	—	1	—

03 — Alternatives

Closest matches to LP5907

AP2127K-3.3TRG1 11.7× higher dropout voltage, 6.0× higher output noise voltage, 5.0× higher quiescent current

L78L05ABD13TR 16.7× higher dropout voltage, 7.8× higher supply voltage range, 4.0× higher output noise voltage

RT9193-33GB 10.0× higher output noise voltage, 7.5× higher quiescent current, 2.4× higher output current

TLV758P 6.0× higher dropout voltage, 5.8× higher output current, 5.3× higher output noise voltage

SPX5205M5-L-5.0 5.8× higher quiescent current, 2.4× higher supply voltage range, 1.8× higher output voltage

AP2112-1.2 8.3× higher dropout voltage, 5.0× higher output noise voltage, 4.8× higher output current

AZ1117C-3.3 10.0× higher dropout voltage, 9.9× higher output noise voltage, 8.0× higher output current

L78M05ABV 16.7× higher dropout voltage, 4.0× higher output current, 4.0× higher output noise voltage

04 — FAQ

Frequently asked questions

What is the dropout voltage of the LP5907 at IOUT = 250mA in a DSBGA package?

The dropout voltage is 120 mV at IOUT = 250mA in a DSBGA package.

What is the maximum operating temperature for the LP5907?

The maximum operating temperature is 125 °C.

What is the output count for the LP5907?

The output count is 1.

What is the output current?

The output current is 250 mA (See(4)).

What is the output noise voltage of the LP5907 when the bandwidth is 10Hz to 100kHz and the output current is 1mA?

The output noise voltage is 10 µV.

What is the output voltage?

The output voltage is 4.5 V.

What is the PSRR of the LP5907 at f = 100Hz and IOUT = 20mA?

The PSRR is 90 dB at f = 100Hz and IOUT = 20mA.

What is the quiescent current when VEN = 1.2V and IOUT = 0mA?

The quiescent current is 12 µA.