ADPL42005

RECOMMENDED FOR NEW DESIGNS

20V, 500mA, Low Noise, CMOS LDO

Data Sheet (Rev. 0) Product Selection Table
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Overview

  • Input voltage range: 4V to 20V
  • Maximum output current: 500mA
  • Low noise: 32μVrms for fixed output versions
  • PSRR performance of 58dB at 10kHz, VOUT = 3.3V
  • Reverse current protection
  • Low dropout voltage: 400mV at 500mA
  • Initial accuracy: ±0.8
  • Accuracy over line, load, and temperature
    • −2% to +1%, TJ = −40°C to +125°C
  • Low quiescent current (VIN = 10V), IGND = 900μA with 500 mA load
  • Low shutdown current: <40μA at VIN = 12V, stable with small 1μF ceramic output capacitor
  • Six fixed output voltage options: 1.5V, 1.8V, 2.5V, 3V, 3.3V, and 5V
  • Adjustable output from 1.22V to VIN − VDO
  • Foldback current limit and thermal overload protection
  • User programmable precision UVLO/enable
  • Power-good indicator
  • 8-lead LFCSP and 8-lead SOIC packages

The ADPL42005 is a complementary metal-oxide semiconductor (CMOS), low dropout linear regulator that operates from 4V to 20V and provides up to 500mA of output current. This high input voltage LDO is ideal for the regulation of high-performance analog and mixed‐signal circuits operating from 19V to 1.22V rails. Using an advanced proprietary architecture, it provides high power supply rejection, low noise, and achieves excellent line and load transient response with just a small 1μF ceramic output capacitor.

The ADPL42005 is available in six fixed output voltage options and an adjustable version, which allows output voltages that range from 1.22V to VIN − VDO through an external feedback divider.

The ADPL42005 output noise voltage is 32μVrms and is independent of the output voltage. A digital powergood output allows power system monitors to check the health of the output voltage. A user programmable precision undervoltage lockout function facilitates sequencing of multiple power supplies.

The ADPL42005 is available in 8-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages (Figure 51 and Figure 52). The LFCSP offers a very compact solution and also provides excellent thermal performance for applications requiring up to 500mA of output current in a small, low-profile footprint.

APPLICATIONS

  • Regulation to noise-sensitive applications: ADC, DAC circuits, precision amplifiers, high-frequency oscillators, clocks, and PLLs
  • Communications and infrastructure
  • Medical and healthcare
  • Industrial and instrumentation
ADPL42005
20V, 500mA, Low Noise, CMOS LDO
ADPL42005 Functional Block Diagram ADPL42005 Pin Configuration ADPL42005 Pin Configuration ADPL42005 Chip Illustration ADPL42005 Chip Ilustration
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Documentation

Data Sheet 1

User Guide 1

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Evaluation Kits

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EVAL-ADPL42005

Evaluates the ADPL42005 20V, 500mA, Low Noise, CMOS LDO Linear Regulator

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Features and Benefits

  • Input voltage range: 4V to 20V
  • Resistor programmed 3.3V output voltage
  • Jumper turns regulator on or connects the EN pin to a connector to turn the regulator on or off externally
  • Jumper connects the SENSE/ADJ pin to the output through a resistor divider or directly
  • VIN, VOUT, and GND test points for regulation and dropout voltage monitoring
  • PG test point for power good voltage monitoring that helps to indicate the status of the output
  • 8-lead (3mm x 3mm) LFCSP package or 8-lead SOIC package

Product Details

The ADPL42005 evaluation boards evaluate the ADPL42005, a 20V, 500mA, low noise, complementary metal oxide semiconductor (CMOS), low dropout (LDO) linear regulator.

See the Ordering Information section for the two types of evaluation boards that evaluate the ADPL42005. There is an evaluation board that features an 8-lead, 3mm x 3mm LFCSP package, and another evaluation board that features an 8-lead SOIC package.

The evaluation boards provide a 3.3V output over an input range of 4.0V to 20V. The maximum output current is 500mA, but the output current is also limited by the thermal dissipation of the ADPL42005. The evaluation boards use the adjustable version of the ADPL42005. A resistor divider programs the output of the adjustable ADPL42005 to 3.3V. Noise performance for the adjustable ADPL42005 can be made comparable to a fixed output ADPL42005 by installing optional RC network components into placeholders provided by the evaluation board printed circuit board (PCB) designs. The evaluation boards can easily be configured with a jumper for fixed output versions of the ADPL42005 that normally have their SENSE/ADJ pin connected directly to the output.

In addition to connectors for the input voltage, output voltage, EN control signal, and ground, the evaluation boards provide test points for the input, output, and PG pin voltages. A jumper normally connects the EN pin to the VIN input, but the jumper can be repositioned so EN can be driven externally at its connector instead.

For more details, refer to the ADPL42005 data sheet. Consult it with this user guide when using the ADPL42005 evaluation boards.
EVAL-ADPL42005
Evaluates the ADPL42005 20V, 500mA, Low Noise, CMOS LDO Linear Regulator
EVAL-ADPL42005 Board Photo Angle View EVAL-ADPL42005 Board Photo Top View EVAL-ADPL42005 Board Photo Bottom View

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