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Analog Devices Inc. ADP7105 LDO Regulator with Soft Start

Analog Devices Inc. ADP7105 LDO Regulator with Soft Start is a CMOS Low Dropout (LDO) Linear Regulator that operates from 3.3V to 20V and provides up to 500mA output current. This high input voltage LDO is ideal for regulating high-performance analog and mixed-signal circuits operating from 1.22V to 19V rails. Using an advanced proprietary architecture, the ADP7105 provides high power supply rejection and low noise and achieves excellent line and load transient response with only a small 1μF ceramic output capacitor.

The ADP7105 is available in three fixed output voltage options and an adjustable version that allows output voltages ranging from 1.22V to 19V via an external feedback divider. The ADP7105 allows an external soft start capacitor to be connected to program the startup.

The ADP7105 output noise voltage is 15μVrms and is independent of the output voltage. A digital power-good output allows power system monitors to check the health of the output voltage. A user-programmable precision undervoltage lockout function facilitates the sequencing of multiple power supplies.

The ADP7105 is available in 8-lead LFCSP and 8-lead SOIC packages. The 3mm x 3mm LFCSP offers a very compact solution and provides excellent thermal performance for applications that require up to 500mA of output current in a small, low-profile footprint.

Features

  • 3.3V to 20V input voltage range
  • 500mA maximum output current
  • 15µVrms low noise for fixed output versions
  • 60dB PSRR performance at 10kHz, VOUT = 3.3V
  • Reverse current protection
  • 350mV at 500mA LDO voltage
  • ±0.8% initial accuracy
  • -2% to +1% accuracy over line, load, and temperature
  • 900μA low quiescent current at VIN = 10V, IOUT= 500 mA
  • <50µA low shutdown current at VIN = 12V, stable with small 1µF ceramic output capacitor
  • 3 fixed output voltage options: 1.8V, 3.3V, 5.0V
  • 1.22V to 19V adjustable output
  • Programmable soft start for inrush current control
  • Foldback current limit and thermal overload protection
  • User programmable precision UVLO/enable
  • Power-good indicator
  • Package options
  • LFCSP-8 (3mm x 3mm)
  • SOIC-8 (3.8mm x 4.9mm)
  • RoHS compliant

Applications

  • Regulation of noise-sensitive applications, including ADC and DAC circuits, precision amplifiers, high-frequency oscillators, clocks, and PLLs
  • Communications and infrastructure
  • Medical and healthcare
  • Industrial and instrumentation

Block Diagram

Block Diagram - Analog Devices Inc. ADP7105 LDO Regulator with Soft Start

Typical Application Circuit

Application Circuit Diagram - Analog Devices Inc. ADP7105 LDO Regulator with Soft Start

Package Outline

Mechanical Drawing - Analog Devices Inc. ADP7105 LDO Regulator with Soft Start
Publicado: 2019-10-22 | Actualizado: 2024-02-29