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Linear- und Low-Dropout-Regler (LDO)

LP38843

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Spannungsregler mit extrem niedrigem Dropout, 3 A, niedriger VIN (1,01 V), mit Aktivierung

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LP38843

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Produktdetails

Output options Fixed Output Iout (max) (A) 3 Vin (max) (V) 5.5 Vin (min) (V) 1.01 Vout (max) (V) 1.5 Vout (min) (V) 0.8 Fixed output options (V) 0.8, 1.2, 1.5 Noise (µVrms) 90 Iq (typ) (mA) 32 Thermal resistance θJA (°C/W) 35 Rating Catalog Load capacitance (min) (µF) 4.7 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 PSRR at 100 KHz (dB) 29 Dropout voltage (Vdo) (typ) (mV) 210 Operating temperature range (°C) -40 to 125
Output options Fixed Output Iout (max) (A) 3 Vin (max) (V) 5.5 Vin (min) (V) 1.01 Vout (max) (V) 1.5 Vout (min) (V) 0.8 Fixed output options (V) 0.8, 1.2, 1.5 Noise (µVrms) 90 Iq (typ) (mA) 32 Thermal resistance θJA (°C/W) 35 Rating Catalog Load capacitance (min) (µF) 4.7 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 PSRR at 100 KHz (dB) 29 Dropout voltage (Vdo) (typ) (mV) 210 Operating temperature range (°C) -40 to 125
TO-220 (KC) 5 45.212 mm² 10.16 x 4.45 TO-263 (KTT) 5 154.8384 mm² 10.16 x 15.24
  • Ideal for Conversion From 1.8V or 1.5V Inputs
  • Designed for use with low ESR Ceramic Capacitors
  • 0.8V, 1.2V and 1.5V Standard Voltages Available
  • Ultra Low Dropout Voltage (210mV at 3A typ)
  • 1.5% Initial Output Accuracy
  • Load Regulation of 0.1%/A (Typical)
  • 30nA Quiescent Current in Shutdown (Typical)
  • Low Ground Pin Current at all Loads
  • Over Temperature/Over Current Protection
  • Available in 5 Lead TO-220 and DDPAK/TO-263 Packages
  • −40°C to +125°C Junction Temperature Range

All trademarks are the property of their respective owners.

  • Ideal for Conversion From 1.8V or 1.5V Inputs
  • Designed for use with low ESR Ceramic Capacitors
  • 0.8V, 1.2V and 1.5V Standard Voltages Available
  • Ultra Low Dropout Voltage (210mV at 3A typ)
  • 1.5% Initial Output Accuracy
  • Load Regulation of 0.1%/A (Typical)
  • 30nA Quiescent Current in Shutdown (Typical)
  • Low Ground Pin Current at all Loads
  • Over Temperature/Over Current Protection
  • Available in 5 Lead TO-220 and DDPAK/TO-263 Packages
  • −40°C to +125°C Junction Temperature Range

All trademarks are the property of their respective owners.

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) when S/D pin 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) when S/D pin is low.

Precision Output Voltage: 1.5% room temperature accuracy.
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Technische Dokumentation

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* Data sheet LP38843 3A Ultra Low Dropout Linear Reg Stable w/Ceramic Output Cap datasheet (Rev. C) 02 Apr 2013

Design und Entwicklung

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