LP38859 Series

3-A, low-VIN (1.15-V), high-accuracy, ultra-low-dropout voltage regulator

Catalog

3-A, low-VIN (1.15-V), high-accuracy, ultra-low-dropout voltage regulator

Part	Operating Temperature [Max]	Operating Temperature [Min]	Protection Features	Supplier Device Package	Control Features	Voltage - Input (Max) [Max]	Mounting Type	Output Type	Current - Supply (Max) [Max]	Voltage Dropout (Max) [Max]	Output Configuration	Package / Case	PSRR [Min]	PSRR [Max]	Current - Quiescent (Iq)	Current - Output	Voltage - Output (Min/Fixed)	Number of Regulators	Channels per IC	Board Type	Utilized IC / Part	Supplied Contents	Voltage - Input [Max]	Voltage - Input [Min]	Voltage - Output	Regulator Type
Texas Instruments LP38859S-1.2	125 °C	-40 °C	Over Current Over Temperature Short Circuit Under Voltage Lockout (UVLO)	TO-263 (DDPAK-5)	Soft Start	5.5 V	Surface Mount	1.81 mOhm	15 mA	0.45 V	Positive	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	65 dB	80 dB	8.5 mA	3 A	1.2 V	1
Texas Instruments LP38859SX-1.2/NOPB	125 °C	-40 °C	Over Current Over Temperature Short Circuit Under Voltage Lockout (UVLO)	TO-263 (DDPAK-5)	Soft Start	5.5 V	Surface Mount	1.81 mOhm	15 mA	0.45 V	Positive	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	65 dB	80 dB	8.5 mA	3 A	1.2 V	1
Texas Instruments LP38859S-1.2/NOPB	125 °C	-40 °C	Over Current Over Temperature Short Circuit Under Voltage Lockout (UVLO)	TO-263 (DDPAK-5)	Soft Start	5.5 V	Surface Mount	1.81 mOhm	15 mA	0.45 V	Positive	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	65 dB	80 dB	8.5 mA	3 A	1.2 V	1
Texas Instruments LP38859T-0.8	125 °C	-40 °C	Over Current Over Temperature Short Circuit Under Voltage Lockout (UVLO)	TO-220-5	Soft Start	5.5 V	Through Hole	1.81 mOhm	15 mA	0.45 V	Positive	TO-220-5 Formed Leads	65 dB	80 dB	8.5 mA	3 A	0.8 V	1
Texas Instruments LP38859SX-1.2	125 °C	-40 °C	Over Current Over Temperature Short Circuit Under Voltage Lockout (UVLO)	TO-263 (DDPAK-5)	Soft Start	5.5 V	Surface Mount	1.81 mOhm	15 mA	0.45 V	Positive	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	65 dB	80 dB	8.5 mA	3 A	1.2 V	1
Texas Instruments LP38859T-0.8/NOPB	125 °C	-40 °C	Over Current Over Temperature Short Circuit Under Voltage Lockout (UVLO)	TO-220-5	Soft Start	5.5 V	Through Hole	1.81 mOhm	15 mA	0.45 V	Positive	TO-220-5 Formed Leads	65 dB	80 dB	8.5 mA	3 A	0.8 V	1
Texas Instruments LP38859T-1.2	125 °C	-40 °C	Over Current Over Temperature Short Circuit Under Voltage Lockout (UVLO)	TO-220-5	Soft Start	5.5 V	Through Hole	1.81 mOhm	15 mA	0.45 V	Positive	TO-220-5 Formed Leads	65 dB	80 dB	8.5 mA	3 A	1.2 V	1
Texas Instruments LP38859-1.2EVAL																3 A			1 - Single	Fully Populated	LP38859	Board(s)	5.5 V	3 V	1.2 V	Positive Fixed

Catalog

3-A, low-VIN (1.15-V), high-accuracy, ultra-low-dropout voltage regulator

Key Features

• Input Voltage: 1.1 V to 5.5 VWide VBIASSupply Operating Range: 3 V to 5.5 VStandard VOUTValues: 0.8 V and 1.2 VStable With 10-µF Ceramic CapacitorsDropout Voltage of 240 mV (typical) at 3-A Load CurrentProgrammable Soft-Start TimePrecision Output Voltage Across All Line and Load Conditions:±1% VOUTfor TJ= 25°C±2% VOUTfor 0°C ≤ TJ≤ +125°C±3% VOUTfor –40°C ≤ TJ≤ +125°COvertemperature and Overcurrent ProtectionOperating Temperature Range: −40°C to +125°CInput Voltage: 1.1 V to 5.5 VWide VBIASSupply Operating Range: 3 V to 5.5 VStandard VOUTValues: 0.8 V and 1.2 VStable With 10-µF Ceramic CapacitorsDropout Voltage of 240 mV (typical) at 3-A Load CurrentProgrammable Soft-Start TimePrecision Output Voltage Across All Line and Load Conditions:±1% VOUTfor TJ= 25°C±2% VOUTfor 0°C ≤ TJ≤ +125°C±3% VOUTfor –40°C ≤ TJ≤ +125°COvertemperature and Overcurrent ProtectionOperating Temperature Range: −40°C to +125°C

Description

The LP38859 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 LP38859 is available in 5-pin TO-220 and DDPAK/TO-263 packages. The LP38859 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 LP38859 is available in 5-pin TO-220 and DDPAK/TO-263 packages.