LP38843 Series

3-A, low-VIN (1.01-V), ultra-low-dropout voltage regulator with enable

Catalog

3-A, low-VIN (1.01-V), ultra-low-dropout voltage regulator with enable

Part	Output Type	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Input (Max) [Max]	PSRR [Min]	PSRR [Max]	Current - Quiescent (Iq)	Current - Output	Voltage Dropout (Max) [Max]	Supplier Device Package	Number of Regulators	Mounting Type	Protection Features	Voltage - Output (Min/Fixed)	Output Configuration	Package / Case	Control Features	Current - Supply (Max)
Texas Instruments LP38843S-1.2	1.81 mOhm	125 °C	-40 °C	5.5 V	65 dB	80 dB	30 µA	3 A	0.5 V	TO-263 (DDPAK-5)	1	Surface Mount	Over Current Over Temperature Short Circuit	1.2 V	Positive	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Enable	40 mA
Texas Instruments LP38843SX-1.5/NOPB	1.81 mOhm	125 °C	-40 °C	5.5 V	65 dB	80 dB	30 µA	3 A	0.5 V	TO-263 (DDPAK-5)	1	Surface Mount	Over Current Over Temperature Short Circuit	1.5 V	Positive	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Enable	40 mA
Texas Instruments LP38843S-1.2/NOPB	1.81 mOhm	125 °C	-40 °C	5.5 V	65 dB	80 dB	30 µA	3 A	0.5 V	TO-263 (DDPAK-5)	1	Surface Mount	Over Current Over Temperature Short Circuit	1.2 V	Positive	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Enable	40 mA
Texas Instruments LP38843T-1.5	1.81 mOhm	125 °C	-40 °C	5.5 V	65 dB	80 dB	30 µA	3 A	0.5 V	TO-220-5	1	Through Hole	Over Current Over Temperature Short Circuit	1.5 V	Positive	TO-220-5	Enable	40 mA
Texas Instruments LP38843T-0.8	1.81 mOhm	125 °C	-40 °C	5.5 V	65 dB	80 dB	30 µA	3 A	0.5 V	TO-220-5	1	Through Hole	Over Current Over Temperature Short Circuit	0.8 V	Positive	TO-220-5	Enable	40 mA
Texas Instruments LP38843T-1.2	1.81 mOhm	125 °C	-40 °C	5.5 V	65 dB	80 dB	30 µA	3 A	0.5 V	TO-220-5	1	Through Hole	Over Current Over Temperature Short Circuit	1.2 V	Positive	TO-220-5	Enable	40 mA
Texas Instruments LP38843SX-1.2/NOPB	1.81 mOhm	125 °C	-40 °C	5.5 V	65 dB	80 dB	30 µA	3 A	0.5 V	TO-263 (DDPAK-5)	1	Surface Mount	Over Current Over Temperature Short Circuit	1.2 V	Positive	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Enable	40 mA

Catalog

3-A, low-VIN (1.01-V), ultra-low-dropout voltage regulator with enable

Key Features

• Ideal for Conversion From 1.8V or 1.5V InputsDesigned for use with low ESR Ceramic Capacitors0.8V, 1.2V and 1.5V Standard Voltages AvailableUltra Low Dropout Voltage (210mV at 3A typ)1.5% Initial Output AccuracyLoad Regulation of 0.1%/A (Typical)30nA Quiescent Current in Shutdown (Typical)Low Ground Pin Current at all LoadsOver Temperature/Over Current ProtectionAvailable in 5 Lead TO-220 and DDPAK/TO-263 Packages−40°C to +125°C Junction Temperature RangeAll trademarks are the property of their respective owners.Ideal for Conversion From 1.8V or 1.5V InputsDesigned for use with low ESR Ceramic Capacitors0.8V, 1.2V and 1.5V Standard Voltages AvailableUltra Low Dropout Voltage (210mV at 3A typ)1.5% Initial Output AccuracyLoad Regulation of 0.1%/A (Typical)30nA Quiescent Current in Shutdown (Typical)Low Ground Pin Current at all LoadsOver Temperature/Over Current ProtectionAvailable in 5 Lead TO-220 and DDPAK/TO-263 Packages−40°C to +125°C Junction Temperature RangeAll trademarks are the property of their respective owners.

Description

The LP38843 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:210 mV (typ) at 3A load current. Quiescent Current:30 mA (typ) at full load. Shutdown Current:30 nA (typ) whenS/Dpin is low. Precision Output Voltage:1.5% room temperature accuracy. The LP38843 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:210 mV (typ) at 3A load current. Quiescent Current:30 mA (typ) at full load. Shutdown Current:30 nA (typ) whenS/Dpin is low. Precision Output Voltage:1.5% room temperature accuracy.