LP3891 Series
800-mA, ultra-low-dropout voltage regulator with enable
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
800-mA, ultra-low-dropout voltage regulator with enable
| Part | Voltage - Input (Max) [Max] | Control Features | Package / Case | Current - Output | Protection Features | Voltage - Output (Min/Fixed) | Mounting Type | Output Configuration | Current - Supply (Max) [Max] | Supplier Device Package | Voltage Dropout (Max) [Max] | Current - Quiescent (Iq) | Operating Temperature [Max] | Operating Temperature [Min] | Number of Regulators | PSRR [Max] | PSRR [Min] | Output Type | Package / Case [custom] | Package / Case [custom] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments LP3891ES-1.2/NOPB | 5.5 V | Enable | D2PAK (5 Leads + Tab), TO-263-6, TO-263BA | 800 mA | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) | 1.2 V | Surface Mount | Positive | 8 mA | TO-263 (DDPAK-5) | 0.4 V | 30 µA | 125 °C | -40 °C | 1 | 80 dB | 65 dB | 27.03 °C/W | ||
Texas Instruments LP3891EMR-1.2/NOPB | 5.5 V | Enable | 8-PowerSOIC | 800 mA | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) | 1.2 V | Surface Mount | Positive | 8 mA | 8-SO PowerPad | 0.43 V | 30 µA | 125 °C | -40 °C | 1 | 80 dB | 65 dB | 27.03 °C/W | 3.9 mm | 0.154 in |
Texas Instruments LP3891ES-1.2 | 5.5 V | Enable | D2PAK (5 Leads + Tab), TO-263-6, TO-263BA | 800 mA | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) | 1.2 V | Surface Mount | Positive | 8 mA | TO-263 (DDPAK-5) | 0.4 V | 30 µA | 125 °C | -40 °C | 1 | 80 dB | 65 dB | 27.03 °C/W | ||
Texas Instruments LP3891ET-1.8/NOPB | 5.5 V | Enable | TO-220-5 Formed Leads | 800 mA | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) | 1.8 V | Through Hole | Positive | 8 mA | TO-220-5 | 0.4 V | 30 µA | 125 °C | -40 °C | 1 | 80 dB | 65 dB | 27.03 °C/W | ||
Texas Instruments LP3891ET-1.2/NOPB | 5.5 V | Enable | TO-220-5 Formed Leads | 800 mA | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) | 1.2 V | Through Hole | Positive | 8 mA | TO-220-5 | 0.4 V | 30 µA | 125 °C | -40 °C | 1 | 80 dB | 65 dB | 27.03 °C/W | ||
Texas Instruments LP3891EMRX-1.2 | 5.5 V | Enable | 8-PowerSOIC | 800 mA | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) | 1.2 V | Surface Mount | Positive | 8 mA | 8-SO PowerPad | 0.43 V | 30 µA | 125 °C | -40 °C | 1 | 80 dB | 65 dB | 27.03 °C/W | 3.9 mm | 0.154 in |
Texas Instruments LP3891EMRX-1.2/NOPB | 5.5 V | Enable | 8-PowerSOIC | 800 mA | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) | 1.2 V | Surface Mount | Positive | 8 mA | 8-SO PowerPad | 0.43 V | 30 µA | 125 °C | -40 °C | 1 | 80 dB | 65 dB | 27.03 °C/W | 3.9 mm | 0.154 in |
Texas Instruments LP3891ES-1.5/NOPB | 5.5 V | Enable | D2PAK (5 Leads + Tab), TO-263-6, TO-263BA | 800 mA | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) | 1.5 V | Surface Mount | Positive | 8 mA | TO-263 (DDPAK-5) | 0.4 V | 30 µA | 125 °C | -40 °C | 1 | 80 dB | 65 dB | 27.03 °C/W | ||
Texas Instruments LP3891EMR-1.2 | 5.5 V | Enable | 8-PowerSOIC | 800 mA | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) | 1.2 V | Surface Mount | Positive | 8 mA | 8-SO PowerPad | 0.43 V | 30 µA | 125 °C | -40 °C | 1 | 80 dB | 65 dB | 27.03 °C/W | 3.9 mm | 0.154 in |
Texas Instruments LP3891EMR-1.5/NOPB | 5.5 V | Enable | 8-PowerSOIC | 800 mA | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) | 1.5 V | Surface Mount | Positive | 8 mA | 8-SO PowerPad | 0.43 V | 30 µA | 125 °C | -40 °C | 1 | 80 dB | 65 dB | 27.03 °C/W | 3.9 mm | 0.154 in |
Texas Instruments LP3891EMR-1.8 | 5.5 V | Enable | 8-PowerSOIC | 800 mA | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) | 1.8 V | Surface Mount | Positive | 8 mA | 8-SO PowerPad | 0.43 V | 30 µA | 125 °C | -40 °C | 1 | 80 dB | 65 dB | 27.03 °C/W | 3.9 mm | 0.154 in |
Texas Instruments LP3891ESX-1.5/NOPB | 5.5 V | Enable | D2PAK (5 Leads + Tab), TO-263-6, TO-263BA | 800 mA | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) | 1.5 V | Surface Mount | Positive | 8 mA | TO-263 (DDPAK-5) | 0.4 V | 30 µA | 125 °C | -40 °C | 1 | 80 dB | 65 dB | 27.03 °C/W | ||
Texas Instruments LP3891ET-1.5/NOPB | 5.5 V | Enable | TO-220-5 Formed Leads | 800 mA | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) | 1.5 V | Through Hole | Positive | 8 mA | TO-220-5 | 0.4 V | 30 µA | 125 °C | -40 °C | 1 | 80 dB | 65 dB | 27.03 °C/W | ||
Texas Instruments LP3891ES-1.8/NOPB | 5.5 V | Enable | D2PAK (5 Leads + Tab), TO-263-6, TO-263BA | 800 mA | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) | 1.8 V | Surface Mount | Positive | 8 mA | TO-263 (DDPAK-5) | 0.4 V | 30 µA | 125 °C | -40 °C | 1 | 80 dB | 65 dB | 27.03 °C/W |
Key Features
• Ultra Low Dropout Voltage (100mV at 0.8A typ)Low Ground Pin CurrentLoad Regulation of 0.04%/A60 nA Typical Quiescent Current in Shutdown1.5% Output Accuracy (25°C)TO-220, DDPAK/TO-263 and SO PowerPAD-8 PackagesOver Temperature/Over Current Protection−40°C to +125°C Junction Temperature RangeAll trademarks are the property of their respective owners.Ultra Low Dropout Voltage (100mV at 0.8A typ)Low Ground Pin CurrentLoad Regulation of 0.04%/A60 nA Typical Quiescent Current in Shutdown1.5% Output Accuracy (25°C)TO-220, DDPAK/TO-263 and SO PowerPAD-8 PackagesOver Temperature/Over Current Protection−40°C to +125°C Junction Temperature RangeAll trademarks are the property of their respective owners.
Description
AI
The LP3891 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, DDPAK/TO-263 and SO PowerPAD-8 packages.
Dropout Voltage:100 mV (typ) at 0.8A load current.
Ground Pin Current:3 mA (typ) at full load.
Shutdown Current:60 nA (typ) when S/D pin is low.
Precision Output Voltage:1.5% room temperature accuracy.
The LP3891 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, DDPAK/TO-263 and SO PowerPAD-8 packages.
Dropout Voltage:100 mV (typ) at 0.8A load current.
Ground Pin Current:3 mA (typ) at full load.
Shutdown Current:60 nA (typ) when S/D pin is low.
Precision Output Voltage:1.5% room temperature accuracy.