LP38855 Series

1.5-A, low-VIN (0.98-V), ultra-low-dropout voltage regulator with enable

Catalog

1.5-A, low-VIN (0.98-V), ultra-low-dropout voltage regulator with enable

Part	Output Configuration	Voltage Dropout (Max) [Max]	Current - Supply (Max) [Max]	Protection Features	Output Type	Current - Quiescent (Iq)	Package / Case	Number of Regulators	Voltage - Input (Max) [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Supplier Device Package	Voltage - Output (Min/Fixed)	Control Features	PSRR [Max]	PSRR [Min]	Current - Output
Texas Instruments LP38855T-0.8/NOPB	Positive	0.18 V	15 mA	Over Current Over Temperature Short Circuit	1.81 mOhm	300 µA	TO-220-5 Formed Leads	1	5.5 V	125 °C	-40 °C	Through Hole	TO-220-5	0.8 V	Enable	80 dB	58 dB	1.5 A
Texas Instruments LP38855S-1.2/NOPB	Positive	0.18 V	15 mA	Over Current Over Temperature Short Circuit Under Voltage Lockout (UVLO)	1.81 mOhm	300 µA	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	1	5.5 V	125 °C	-40 °C	Surface Mount	TO-263 (DDPAK-5)	1.2 V	Enable	80 dB	65 dB	1.5 A
Texas Instruments LP38855S-0.8/NOPB	Positive	0.18 V	15 mA	Over Current Over Temperature Short Circuit	1.81 mOhm	300 µA	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	1	5.5 V	125 °C	-40 °C	Surface Mount	TO-263 (DDPAK-5)	0.8 V	Enable	80 dB	58 dB	1.5 A
Texas Instruments LP38855SX-1.2/NOPB	Positive	0.18 V	15 mA	Over Current Over Temperature Short Circuit Under Voltage Lockout (UVLO)	1.81 mOhm	300 µA	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	1	5.5 V	125 °C	-40 °C	Surface Mount	TO-263 (DDPAK-5)	1.2 V	Enable	80 dB	65 dB	1.5 A
Texas Instruments LP38855T-0.8	Positive	0.18 V	15 mA	Over Current Over Temperature Short Circuit	1.81 mOhm	300 µA	TO-220-5 Formed Leads	1	5.5 V	125 °C	-40 °C	Through Hole	TO-220-5	0.8 V	Enable	80 dB	58 dB	1.5 A
Texas Instruments LP38855S-1.2	Positive	0.18 V	15 mA	Over Current Over Temperature Short Circuit Under Voltage Lockout (UVLO)	1.81 mOhm	300 µA	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	1	5.5 V	125 °C	-40 °C	Surface Mount	TO-263 (DDPAK-5)	1.2 V	Enable	80 dB	65 dB	1.5 A

Catalog

1.5-A, low-VIN (0.98-V), ultra-low-dropout voltage regulator with enable

Key Features

• Standard VOUTValues of 0.8V and 1.2VWide VBIASSupply Operating Range of 3.0V to 5.5VStable with 10 µF Ceramic CapacitorsDropout Voltage of 130 mV (Typical) at 1.5A Load CurrentPrecision Output Voltage Across All Line and Load Conditions:±1.0% for TJ= 25°C±2.0% for 0°C ≤ TJ≤ +125°C±3.0% for -40°C ≤ TJ≤ +125°COver-Temperature and Over-Current ProtectionAvailable in 5 Lead TO-220 and DDPAK/TO-263 PackagesCustom VOUTValues between 0.8V and 1.2V are Available-40°C to +125°C Operating Temperature RangeAll trademarks are the property of their respective owners.Standard VOUTValues of 0.8V and 1.2VWide VBIASSupply Operating Range of 3.0V to 5.5VStable with 10 µF Ceramic CapacitorsDropout Voltage of 130 mV (Typical) at 1.5A Load CurrentPrecision Output Voltage Across All Line and Load Conditions:±1.0% for TJ= 25°C±2.0% for 0°C ≤ TJ≤ +125°C±3.0% for -40°C ≤ TJ≤ +125°COver-Temperature and Over-Current ProtectionAvailable in 5 Lead TO-220 and DDPAK/TO-263 PackagesCustom VOUTValues between 0.8V and 1.2V are Available-40°C to +125°C Operating Temperature RangeAll trademarks are the property of their respective owners.

Description

The LP38855 is a high-current, fast-response regulator which can maintain output voltage regulation with an extremely low input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: VBIASprovides power for the internal bias and control circuits, as well as drive for the gate of the N-MOS power transistor, while VINsupplies power to the load. The use of an external bias rail allows the part to operate from ultra low VINvoltages. 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 this device makes it suitable for use in powering DSP, Microcontroller Core voltages and Switch Mode Power Supply post regulators. The LP38855 is available in TO-220 and DDPAK/TO-263 5-Lead packages. Dropout Voltage:130 mV (typical) at 1.5A load current. Low Ground Pin Current:10 mA (typical) at 1.5A load current. Shutdown Current:1 µA (typical) IIN(GND)when EN pin is low. Precision Output Voltage:±1.0% for TJ= 25°C and ±2.0% for 0°C ≤ TJ≤ +125°C, across all line and load conditions The LP38855 is a high-current, fast-response regulator which can maintain output voltage regulation with an extremely low input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: VBIASprovides power for the internal bias and control circuits, as well as drive for the gate of the N-MOS power transistor, while VINsupplies power to the load. The use of an external bias rail allows the part to operate from ultra low VINvoltages. 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 this device makes it suitable for use in powering DSP, Microcontroller Core voltages and Switch Mode Power Supply post regulators. The LP38855 is available in TO-220 and DDPAK/TO-263 5-Lead packages. Dropout Voltage:130 mV (typical) at 1.5A load current. Low Ground Pin Current:10 mA (typical) at 1.5A load current. Shutdown Current:1 µA (typical) IIN(GND)when EN pin is low. Precision Output Voltage:±1.0% for TJ= 25°C and ±2.0% for 0°C ≤ TJ≤ +125°C, across all line and load conditions