Specification	LP38841S-0.8/NOPB

Control Features	Enable
Current - Output	800 mA
Current - Quiescent (Iq)	30 µA
Current - Supply (Max)	40 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-263-6, TO-263BA, D2PAK (5 Leads + Tab)
Protection Features	Over Temperature, Over Current, Short Circuit
PSRR [Max]	80 dB
PSRR [Min]	65 dB
Supplier Device Package	TO-263 (DDPAK-5)
Voltage - Input (Max) [Max]	5.5 V
Voltage - Output (Min/Fixed)	0.8 V
Voltage Dropout (Max) [Max]	0.21 V

LP38841-ADJ Series

800-mA, low-VIN (0.635-V), adjustable ultra-low-dropout voltage regulator with enable

Part	Mounting Type	Protection Features	Output Configuration	Output Type	Control Features	Supplier Device Package	Voltage - Output (Min/Fixed)	Number of Regulators	Operating Temperature [Max]	Operating Temperature [Min]	Current - Output	Package / Case	Voltage - Input (Max) [Max]	Current - Supply (Max)	Current - Quiescent (Iq)	PSRR [Min]	PSRR [Max]	Voltage Dropout (Max) [Max]	Voltage - Output (Max)	Package / Case [y]	Package / Case [x]	Output Type
Texas Instruments LP38841SX-1.2/NOPB	Surface Mount	Over Current Over Temperature Short Circuit	Positive	1.81 mOhm	Enable	TO-263 (DDPAK-5)	1.2 V	1	125 °C	-40 °C	800 mA	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	5.5 V	40 mA	30 µA	65 dB	80 dB	0.21 V
Texas Instruments LP38841MRX-ADJ/NOPB	Surface Mount	Over Current Over Temperature Short Circuit	Positive		Enable	8-SO PowerPad	0.56 V	1	125 °C	-40 °C	800 mA	8-PowerSOIC	5.5 V	40 mA	30 µA	65 dB	80 dB	0.21 V	1.5 V	3.9 mm	0.154 in	Adjustable
Texas Instruments LP38841T-1.2/LF03	Through Hole	Over Current Over Temperature Short Circuit	Positive	1.81 mOhm	Enable	TO-220-5	1.2 V	1	125 °C	-40 °C	800 mA	TO-220-5 Formed Leads	5.5 V	40 mA	30 µA	65 dB	80 dB	0.21 V
Texas Instruments LP38841T-1.5/NOPB	Through Hole	Over Current Over Temperature Short Circuit	Positive	1.81 mOhm	Enable	TO-220-5	1.5 V	1	125 °C	-40 °C	800 mA	TO-220-5	5.5 V	40 mA	30 µA	65 dB	80 dB	0.21 V
Texas Instruments LP38841S-0.8/NOPB	Surface Mount	Over Current Over Temperature Short Circuit	Positive	1.81 mOhm	Enable	TO-263 (DDPAK-5)	0.8 V	1	125 °C	-40 °C	800 mA	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	5.5 V	40 mA	30 µA	65 dB	80 dB	0.21 V
Texas Instruments LP38841MRX-ADJ	Surface Mount	Over Current Over Temperature Short Circuit	Positive		Enable	8-SO PowerPad	0.56 V	1	125 °C	-40 °C	800 mA	8-PowerSOIC	5.5 V	40 mA	30 µA	65 dB	80 dB	0.21 V	1.5 V	3.9 mm	0.154 in	Adjustable
Texas Instruments LP38841MR-ADJ	Surface Mount	Over Current Over Temperature Short Circuit	Positive		Enable	8-SO PowerPad	0.56 V	1	125 °C	-40 °C	800 mA	8-PowerSOIC	5.5 V	40 mA	30 µA	65 dB	80 dB	0.21 V	1.5 V	3.9 mm	0.154 in	Adjustable
Texas Instruments LP38841T-0.8/NOPB	Through Hole	Over Current Over Temperature Short Circuit	Positive	1.81 mOhm	Enable	TO-220-5	0.8 V	1	125 °C	-40 °C	800 mA	TO-220-5	5.5 V	40 mA	30 µA	65 dB	80 dB	0.21 V
Texas Instruments LP38841SX-0.8/NOPB	Surface Mount	Over Current Over Temperature Short Circuit	Positive	1.81 mOhm	Enable	TO-263 (DDPAK-5)	0.8 V	1	125 °C	-40 °C	800 mA	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	5.5 V	40 mA	30 µA	65 dB	80 dB	0.21 V
Texas Instruments LP38841T-1.2/NOPB	Through Hole	Over Current Over Temperature Short Circuit	Positive	1.81 mOhm	Enable	TO-220-5	1.2 V	1	125 °C	-40 °C	800 mA	TO-220-5	5.5 V	40 mA	30 µA	65 dB	80 dB	0.21 V

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 2.94
		10	$ 2.64
		45	$ 2.50
		135	$ 2.17
		270	$ 2.06
		540	$ 1.84
		1035	$ 1.56
		2520	$ 1.48
		5040	$ 1.42
Texas Instruments	TUBE	1	$ 3.40
		100	$ 2.20
		250	$ 1.66
		1000	$ 1.10

Description

General part information

LP38841-ADJ Series

The LP38841 is a high current, fast response regulator which can maintain output voltage regulation with minimum input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: Vbias provides voltage to drive the gate of the N-MOS power transistor, while Vin is the input voltage which supplies power to the load. The use of an external bias rail allows the part to operate from ultra low Vin voltages. Unlike bipolar regulators, the CMOS architecture consumes extremely low quiescent current at any output load current. The use of an N-MOS power transistor results in wide bandwidth, yet minimum external capacitance is required to maintain loop stability.

The fast transient response of these devices makes them suitable for use in powering DSP, Microcontroller Core voltages and Switch Mode Power Supply post regulators. The parts are available in TO-220 and DDPAK/TO-263 packages.

Dropout Voltage:75 mV (typ) at 0.8A load current.

Documents

Technical documentation and resources

Datasheet

AN-1457 LP3884X-ADJ Evaluation Board (Rev. A)

EVM User's guide