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Linear & low-dropout (LDO) regulators

LP3982

ACTIVE

300-mA, high-accuracy, low-dropout voltage regulator with power good & enable

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Data sheet

LP3982

ACTIVE
Data sheet Order now

Product details

Output options Adjustable Output, Fixed Output Iout (max) (A) 0.3 Vin (max) (V) 6 Vin (min) (V) 2.5 Vout (max) (V) 3.3 Vout (min) (V) 1.8 Fixed output options (V) 1.8, 2.5, 2.82, 3, 3.3 Rating Catalog Noise (µVrms) 37 PSRR at 100 KHz (dB) 20 Iq (typ) (mA) 0.09 Thermal resistance θJA (°C/W) 53 Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Features Enable, Power good Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 120 Operating temperature range (°C) -40 to 85
Output options Adjustable Output, Fixed Output Iout (max) (A) 0.3 Vin (max) (V) 6 Vin (min) (V) 2.5 Vout (max) (V) 3.3 Vout (min) (V) 1.8 Fixed output options (V) 1.8, 2.5, 2.82, 3, 3.3 Rating Catalog Noise (µVrms) 37 PSRR at 100 KHz (dB) 20 Iq (typ) (mA) 0.09 Thermal resistance θJA (°C/W) 53 Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Features Enable, Power good Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 120 Operating temperature range (°C) -40 to 85
VSSOP (DGK) 8 14.7 mm² 3 x 4.9 WSON (NGM) 8 7.5 mm² 2.5 x 3
  • 2.5-V to 6-V Input Range
  • MAX8860 Pin, Package, and Specification Compatible
  • 300-mA Output Current
  • 120-mV Typical Dropout at 300 mA
  • 90-µA Typical Quiescent Current
  • 1-nA Typical Shutdown Mode
  • 60-dB Typical PSRR
  • 120-µs Typical Turnon Time
  • Stable With Small Ceramic Output Capacitors
  • 37-µVRMS Output Voltage Noise
    (10 Hz to 100 kHz)
  • Overtemperature/Overcurrent Protection
  • ±2% Output Voltage Tolerance
  • Create a Custom Design Using the LP3982 With the WEBENCH® Power Designer
  • 2.5-V to 6-V Input Range
  • MAX8860 Pin, Package, and Specification Compatible
  • 300-mA Output Current
  • 120-mV Typical Dropout at 300 mA
  • 90-µA Typical Quiescent Current
  • 1-nA Typical Shutdown Mode
  • 60-dB Typical PSRR
  • 120-µs Typical Turnon Time
  • Stable With Small Ceramic Output Capacitors
  • 37-µVRMS Output Voltage Noise
    (10 Hz to 100 kHz)
  • Overtemperature/Overcurrent Protection
  • ±2% Output Voltage Tolerance
  • Create a Custom Design Using the LP3982 With the WEBENCH® Power Designer

The LP3982 low-dropout (LDO) CMOS linear regulator is available in 1.8-V, 2.5-V, 2.82-V, 3-V,
3.3-V, and adjustable versions. They deliver 300 mA of output current. Packaged in an 8-pin VSSOP, the LP3982 is pin- and package-compatible with Maxim’s MAX8860. The LM3982 is also available in the small footprint WSON package.

The LP3982 suits battery-powered applications because of its shutdown mode (1 nA typical), low quiescent current (90 µA typical), and LDO voltage (120 mV typical). The low dropout voltage allows for more utilization of a battery’s available energy by operating closer to its end-of-life voltage. The LP3982 device’s PMOS output transistor consumes relatively no drive current compared to PNP LDO regulators.

This PMOS regulator is stable with small ceramic capacitive loads (2.2 µF typical).

These devices also include regulation fault detection, a bandgap voltage reference, constant current limiting, and thermal-overload protection.

The LP3982 low-dropout (LDO) CMOS linear regulator is available in 1.8-V, 2.5-V, 2.82-V, 3-V,
3.3-V, and adjustable versions. They deliver 300 mA of output current. Packaged in an 8-pin VSSOP, the LP3982 is pin- and package-compatible with Maxim’s MAX8860. The LM3982 is also available in the small footprint WSON package.

The LP3982 suits battery-powered applications because of its shutdown mode (1 nA typical), low quiescent current (90 µA typical), and LDO voltage (120 mV typical). The low dropout voltage allows for more utilization of a battery’s available energy by operating closer to its end-of-life voltage. The LP3982 device’s PMOS output transistor consumes relatively no drive current compared to PNP LDO regulators.

This PMOS regulator is stable with small ceramic capacitive loads (2.2 µF typical).

These devices also include regulation fault detection, a bandgap voltage reference, constant current limiting, and thermal-overload protection.
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Technical documentation

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* Data sheet LP3982 Micropower, Ultra-Low-Dropout, Low-Noise, 300-mA CMOS Regulator datasheet (Rev. F) PDF | HTML 25 Apr 2017
Technical article Integrated power devices simplify FPGA and SoC designs PDF | HTML 11 Jan 2017

Design & development

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Reference designs

TIDA-01172 — Dynamic Voltage Scaling Power Solution for MSP430 Devices With Single-Channel LDO Reference Design

This reference design enables power savings for MSP430 FRAM devices or other systems that use a power-on hysteresis. TIDA-01172 uses an adjustable LDO and an RC-time delay to switch from a higher start-up voltage to the final low-power operating voltage.
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
VSSOP (DGK) 8 Ultra Librarian
WSON (NGM) 8 Ultra Librarian
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