LP38851 Series

800-mA, low-VIN (0.915-V), adjustable ultra-low-dropout voltage regulator with enable

Catalog

800-mA, low-VIN (0.915-V), adjustable ultra-low-dropout voltage regulator with enable

Part	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Voltage - Input (Max) [Max]	Voltage Dropout (Max) [Max]	Control Features	Output Type	Output Configuration	Protection Features	Voltage - Output (Max) [Max]	Number of Regulators	Current - Quiescent (Iq)	Mounting Type	Current - Output	Voltage - Output (Min/Fixed)	PSRR [Min]	PSRR [Max]	Current - Supply (Max) [Max]	Package / Case [y]	Package / Case [x]
Texas Instruments LP38851SX-ADJ/NOPB	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	125 °C	-40 °C	TO-263 (DDPAK-7)	5.5 V	0.2 V	Enable Soft Start	Adjustable	Positive	Over Current Over Temperature Short Circuit Under Voltage Lockout (UVLO)	1.8 V	1	300 µA	Surface Mount	800 mA	0.8 V	61 dB	72 dB	9 mA
Texas Instruments LP38851T-ADJ	TO-220-7 Formed Leads	125 °C	-40 °C	TO-220-7	5.5 V	0.2 V	Enable Soft Start	Adjustable	Positive	Over Current Over Temperature Short Circuit Under Voltage Lockout (UVLO)	1.8 V	1	300 µA	Through Hole	800 mA	0.8 V	61 dB	72 dB	9 mA
Texas Instruments LP38851MR-ADJ/NOPB	8-PowerSOIC	125 °C	-40 °C	8-SO PowerPad	5.5 V	0.2 V	Enable Soft Start	Adjustable	Positive	Over Current Over Temperature Short Circuit Under Voltage Lockout (UVLO)	1.8 V	1	300 µA	Surface Mount	800 mA	0.8 V	61 dB	72 dB	9 mA	3.9 mm	0.154 in
Texas Instruments LP38851MRX-ADJ/NOPB	8-PowerSOIC	125 °C	-40 °C	8-SO PowerPad	5.5 V	0.2 V	Enable Soft Start	Adjustable	Positive	Over Current Over Temperature Short Circuit Under Voltage Lockout (UVLO)	1.8 V	1	300 µA	Surface Mount	800 mA	0.8 V	61 dB	72 dB	9 mA	3.9 mm	0.154 in
Texas Instruments LP38851SX-ADJ	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	125 °C	-40 °C	TO-263 (DDPAK-7)	5.5 V	0.2 V	Enable Soft Start	Adjustable	Positive	Over Current Over Temperature Short Circuit Under Voltage Lockout (UVLO)	1.8 V	1	300 µA	Surface Mount	800 mA	0.8 V	61 dB	72 dB	9 mA
Texas Instruments LP38851S-ADJ	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	125 °C	-40 °C	TO-263 (DDPAK-7)	5.5 V	0.2 V	Enable Soft Start	Adjustable	Positive	Over Current Over Temperature Short Circuit Under Voltage Lockout (UVLO)	1.8 V	1	300 µA	Surface Mount	800 mA	0.8 V	61 dB	72 dB	9 mA

Catalog

800-mA, low-VIN (0.915-V), adjustable ultra-low-dropout voltage regulator with enable

Key Features

• Adjustable VOUTRange of 0.80V to 1.8VWide VBIASSupply Operating Range of 3.0V to 5.5VStable with 10µF Ceramic CapacitorsDropout Voltage of 115 mV (Typical) at 800 mA Load CurrentPrecision VADJacross All Line and Load Conditions:±1.5% VADJfor TJ= 25°C±2.0% VADJfor 0°C ≤ TJ≤ +125°C±3.0% VADJfor -40°C ≤ TJ≤ +125°COver-Temperature and Over-Current ProtectionAvailable in 8-Lead SO PowerPad,7-Lead SFM and 7-Lead PFM Packages−40°C to +125°C Operating Junction Temperature RangeAll trademarks are the property of their respective owners.Adjustable VOUTRange of 0.80V to 1.8VWide VBIASSupply Operating Range of 3.0V to 5.5VStable with 10µF Ceramic CapacitorsDropout Voltage of 115 mV (Typical) at 800 mA Load CurrentPrecision VADJacross All Line and Load Conditions:±1.5% VADJfor TJ= 25°C±2.0% VADJfor 0°C ≤ TJ≤ +125°C±3.0% VADJfor -40°C ≤ TJ≤ +125°COver-Temperature and Over-Current ProtectionAvailable in 8-Lead SO PowerPad,7-Lead SFM and 7-Lead PFM Packages−40°C to +125°C Operating Junction Temperature RangeAll trademarks are the property of their respective owners.

Description

The LP38851-ADJ is a high current, fast response regulator which can maintain output voltage regulation with extremely low input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: VBIASprovides voltage to drive the gate of the N-MOS power transistor, while VINis the input voltage which supplies 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 part is available in PSOP 8–pin, SFM 7–pin, and TO-263 7-pin packages. The LP38851-ADJ is a high current, fast response regulator which can maintain output voltage regulation with extremely low input to output voltage drop. Fabricated on a CMOS process, the device operates from two input voltages: VBIASprovides voltage to drive the gate of the N-MOS power transistor, while VINis the input voltage which supplies 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 part is available in PSOP 8–pin, SFM 7–pin, and TO-263 7-pin packages.