Specification	LP3855EMP-2.5/NOPB

Control Features	Enable
Current - Output	1.5 A
Current - Quiescent (Iq)	3 mA
Current - Supply (Max) [Max]	10 mA
Mounting Type	Surface Mount
Number of Regulators	1
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	1.81 mOhm
Package / Case	TO-261-5, TO-261AB
Protection Features	Over Temperature, Over Current, Short Circuit
PSRR [Max]	73 dB
PSRR [Min]	57 dB
Supplier Device Package	SOT-223-5
Voltage - Input (Max) [Max]	7 V
Voltage - Output (Min/Fixed)	2.5 V
Voltage Dropout (Max) [Max]	0.44 V

LP3855-ADJ Series

1.5-A, 7-V, adjustable ultra-low-dropout voltage regulator with enable

Part	Voltage - Output (Min/Fixed)	Mounting Type	Current - Quiescent (Iq)	Package / Case	Protection Features	Control Features	PSRR [Max]	PSRR [Min]	Voltage - Input (Max) [Max]	Voltage Dropout (Max) [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Current - Supply (Max) [Max]	Output Configuration	Current - Output	Supplier Device Package	Output Type	Number of Regulators	Output Type	Voltage - Output (Max) [Max]
Texas Instruments LP3855ET-5.0	5 V	Through Hole	3 mA	TO-220-5 Formed Leads	Over Current Over Temperature Short Circuit	Enable	73 dB	57 dB	7 V	0.38 V	125 °C	-40 °C	10 mA	Positive	1.5 A	TO-220-5	1.81 mOhm	1
Texas Instruments LP3855EMPX-5.0	5 V	Surface Mount	3 mA	TO-261-5 TO-261AB	Over Current Over Temperature Short Circuit	Enable	73 dB	57 dB	7 V	0.44 V	125 °C	-40 °C	10 mA	Positive	1.5 A	SOT-223-5	1.81 mOhm	1
Texas Instruments LP3855EMP-5.0/NOPB	5 V	Surface Mount	3 mA	TO-261-5 TO-261AB	Over Current Over Temperature Short Circuit	Enable	73 dB	57 dB	7 V	0.44 V	125 °C	-40 °C	10 mA	Positive	1.5 A	SOT-223-5	1.81 mOhm	1
Texas Instruments LP3855EMP-2.5/NOPB	2.5 V	Surface Mount	3 mA	TO-261-5 TO-261AB	Over Current Over Temperature Short Circuit	Enable	73 dB	57 dB	7 V	0.44 V	125 °C	-40 °C	10 mA	Positive	1.5 A	SOT-223-5	1.81 mOhm	1
Texas Instruments LP3855EMPX-5.0/NOPB	5 V	Surface Mount	3 mA	TO-261-5 TO-261AB	Over Current Over Temperature Short Circuit	Enable	73 dB	57 dB	7 V	0.44 V	125 °C	-40 °C	10 mA	Positive	1.5 A	SOT-223-5	1.81 mOhm	1
Texas Instruments LP3855ES-3.3	3.3 V	Surface Mount	3 mA	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Over Current Over Temperature Short Circuit	Enable	73 dB	57 dB	7 V	0.38 V	125 °C	-40 °C	10 mA	Positive	1.5 A	TO-263 (DDPAK-5)	1.81 mOhm	1
Texas Instruments LP3855EMP-ADJ	1.23 V	Surface Mount	3 mA	TO-261-5 TO-261AB	Over Current Over Temperature Short Circuit	Enable	73 dB	57 dB	7 V	0.435 V	125 °C	-40 °C	10 mA	Positive	1.5 A	SOT-223-5		1	Adjustable	6.6 V
Texas Instruments LP3855ES-ADJ/NOPB	1.23 V	Surface Mount	3 mA	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Over Current Over Temperature Short Circuit	Enable	73 dB	57 dB	7 V	0.435 V	125 °C	-40 °C	10 mA	Positive	1.5 A	TO-263 (DDPAK-5)		1	Adjustable	6.6 V
Texas Instruments LP3855ET-2.5/NOPB	2.5 V	Through Hole	3 mA	TO-220-5 Formed Leads	Over Current Over Temperature Short Circuit	Enable	73 dB	57 dB	7 V	0.38 V	125 °C	-40 °C	10 mA	Positive	1.5 A	TO-220-5	1.81 mOhm	1
Texas Instruments LP3855ESX-5.0	5 V	Surface Mount	3 mA	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Over Current Over Temperature Short Circuit	Enable	73 dB	57 dB	7 V	0.38 V	125 °C	-40 °C	10 mA	Positive	1.5 A	TO-263 (DDPAK-5)	1.81 mOhm	1

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 5.30
		10	$ 4.76
		25	$ 4.50
		100	$ 3.90
		250	$ 3.70
		500	$ 3.32
	Digi-Reel®	1	$ 5.30
		10	$ 4.76
		25	$ 4.50
		100	$ 3.90
		250	$ 3.70
		500	$ 3.32
	Tape & Reel (TR)	1000	$ 1.19
Texas Instruments	LARGE T&R	1	$ 2.94
		100	$ 1.90
		250	$ 1.43
		1000	$ 0.95

Description

General part information

LP3855-ADJ Series

The LP3852 and LP3855 series of fast ultra-low dropout linear regulators operate from a 2.5-V to 7-V input supply. A wide range of preset output voltage options are available. These ultra-low dropout linear regulators respond very quickly to step changes in load, which makes them suitable for low voltage microprocessor applications. The LP3852 and LP3855 are developed on a CMOS process which allows low quiescent-current operation independent of output load current, typically 4 mA at 1.5-A load current. This CMOS process also allows the LP3852 and LP3855 to operate under extremely low dropout conditions, typically 24 mV at 150-mA load current and 240 mV at 1.5-A load current.

The LP3852 has anERRORpin; it goes low when the output voltage drops 10% below nominal value. The LP3855 has a SENSE pin to improves regulation at remote loads.

The LP3852 and LP3855 are available with fixed output voltages from 1.8 V to 5 V with a specified accuracy of ±1.5% at room temperature, and ±3% over all conditions (varying line, load, and temperature). Contact Texas Instruments Sales for specific voltage option needs.

Documents

Technical documentation and resources

LP385x 1.5-A Fast Response Ultra-Low Dropout Linear Regulators datasheet (Rev. I)

Data sheet