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10.5μVRMS Low Noise 500mA LDO Linear Regulator

10.5μVRMS Low-Noise, Low-Dropout, 500mA Linear Regulators in a 2mm x 2mm TDFN Package

Product Details

The MAX38902A/B/C/D are low-noise, linear regulators that deliver up to 500mA of output current with only 10.5µVRMS of output noise from 10Hz to 100kHz. These regulators maintain ±1% output accuracy over a wide input voltage range, requiring only 100mV of input-to-output headroom at full load. The 365μA no-load supply current is independent of drop-out voltage.

The MAX38902A have nine, pin-selectable output voltages 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.1V, 3.3V, 4.0V, and 5V. The MAX38902B/C have a resistor adjustable output voltage in the range of 0.6V to 5.3V. The MAX38902B also includes an active-low POK output.

The MAX38902D have factory-preset output voltages ranging from 0.7V to 5V. All versions include a programmable output soft-start rate, output over-current and thermal overload protection.

The MAX38902A/B are offered in an 8-pin TDFN package, while the MAX38902C/D are offered in a 2 x 3, 0.4mm wafer-level package (WLP).

Design Solution: Modern Portable Devices Require a New Breed of LDOs ›

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Key Features

  • 1.7V to 5.5V Input Voltage Range
  • 0.6V to 5.3V Output Voltage Range
  • 10.5µVRMS Output Noise, 10Hz to 100kHz
  • 365µA Operating Supply Current
  • 70dB PSRR at 10kHz
  • 500mA Maximum Output Current
  • ±1% DC Accuracy Over Load, Line, and Temperature
  • 100mV (Max) Dropout at 500mA Load (3.6VIN)
  • < 0.1µA Shutdown Supply Current
  • Stable with 2µF (Min) Output Capacitance
  • Programmable Soft-Start Rate
  • Overcurrent and Overtemperature Protection
  • Output-to-Input Reversed Current Protection
  • Active-Low POK Output
  • Pin-to-Pin Compatible with MAX8902 (TDFN)
  • 1.22mm x 0.82mm, 2 x 3 Bump, 0.4mm Pitch WLP, or 2mm x 2mm 8-pin TDFN Package

Applications/Uses

  • Audio Systems
  • Communication Circuitry
  • High-Resolution Data Acquisition Systems
Parametric specs for Linear Regulators
VIN (V) (min) 1.7
VIN (V) (max) 5.5
Adj. VOUT (V) (min) 0.6
Adj. VOUT (V) (max) 5.3
Rated ILOAD (mA) 500
Preset VOUT (V) -
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.05
ICC (µA) (max) 600
Output Voltage Noise (µV RMS) (typ) 12
Ref. Bypass Yes
Low Batt./ Pwr. Fail Out No
POK/Reset Thresh. (V) (nom) Vout-9%
Watchdog No
Reverse Batt. Protect. No
Oper. Temp. (°C) -40 to +125
Package/Pins TDFN-CU/8
Budgetary
Price (See Notes)
$0.66 @1k
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Simplified Block Diagram

MAX38902A, MAX38902B, MAX38902C, MAX38902D: Typical Operating Circuits MAX38902A, MAX38902B, MAX38902C, MAX38902D: Typical Operating Circuits Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX38902 evaluation kit (EV kit) evaluates the MAX38902A/B/C/D IC family of low noise linear regulators. The MAX38902 EV kit features two independent circuits to evaluate two different IC packages of the MAX38902A/B/C/D family. Both circuits on the EV kit operate over an input range of 1.7V to 5.5V, and provide any output voltage range of 0.6V to 5.3V. The TDFN circuit evaluates the MAX38902A/B, while the wafer-level package (WLP) circuit evaluates the MAX38902C/D. Each circuit output on the EV kit delivers up to 500mA of current.

The EV kit comes with the MAX38902A-ATA+ and the MAX38902C-ANT+ installed.

View Details

Features

  • Two Independent Circuits on One Board
    • Evaluates the MAX38902A/B IC in an 8-pin (2mm x 2mm) TDFN
    • Evaluates the MAX38902C/D IC in a 6-ball (1.45mm x 0.86mm) WLP
  • 1.7V to 5.5V Input Range
  • 1.2V to 5.0V Jumper Configurable Output Voltage (MAX38902A, On Board)
  • 0.6V to 5.3V Resistor Configurable Output Voltage (MAX38902B, with IC Replacement)
  • 0.6V to 5.3V Resistor Configurable Output Voltage (MAX38902C, On Board)
  • 1.2V to 5.0V Factory-Preset Output Voltage (MAX38902D, with IC Replacement)
  • Up to 500mA Output Current
  • Proven 2-Layer 1-oz Copper PCB Layout
  • Demonstrates Compact Solution Size
  • Fully Assembled and Tested

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Parameters

Parametric specs for Linear Regulators
VIN (V) (min) 1.7
VIN (V) (max) 5.5
Adj. VOUT (V) (min) 0.6
Adj. VOUT (V) (max) 5.3
Rated ILOAD (mA) 500
Preset VOUT (V) -
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.05
ICC (µA) (max) 600
Output Voltage Noise (µV RMS) (typ) 12
Ref. Bypass Yes
Low Batt./ Pwr. Fail Out No
POK/Reset Thresh. (V) (nom) Vout-9%
Watchdog No
Reverse Batt. Protect. No
Oper. Temp. (°C) -40 to +125
Package/Pins TDFN-CU/8
Budgetary
Price (See Notes)
$0.66 @1k

Key Features

  • 1.7V to 5.5V Input Voltage Range
  • 0.6V to 5.3V Output Voltage Range
  • 10.5µVRMS Output Noise, 10Hz to 100kHz
  • 365µA Operating Supply Current
  • 70dB PSRR at 10kHz
  • 500mA Maximum Output Current
  • ±1% DC Accuracy Over Load, Line, and Temperature
  • 100mV (Max) Dropout at 500mA Load (3.6VIN)
  • < 0.1µA Shutdown Supply Current
  • Stable with 2µF (Min) Output Capacitance
  • Programmable Soft-Start Rate
  • Overcurrent and Overtemperature Protection
  • Output-to-Input Reversed Current Protection
  • Active-Low POK Output
  • Pin-to-Pin Compatible with MAX8902 (TDFN)
  • 1.22mm x 0.82mm, 2 x 3 Bump, 0.4mm Pitch WLP, or 2mm x 2mm 8-pin TDFN Package

Applications/Uses

  • Audio Systems
  • Communication Circuitry
  • High-Resolution Data Acquisition Systems

Description

The MAX38902A/B/C/D are low-noise, linear regulators that deliver up to 500mA of output current with only 10.5µVRMS of output noise from 10Hz to 100kHz. These regulators maintain ±1% output accuracy over a wide input voltage range, requiring only 100mV of input-to-output headroom at full load. The 365μA no-load supply current is independent of drop-out voltage.

The MAX38902A have nine, pin-selectable output voltages 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.1V, 3.3V, 4.0V, and 5V. The MAX38902B/C have a resistor adjustable output voltage in the range of 0.6V to 5.3V. The MAX38902B also includes an active-low POK output.

The MAX38902D have factory-preset output voltages ranging from 0.7V to 5V. All versions include a programmable output soft-start rate, output over-current and thermal overload protection.

The MAX38902A/B are offered in an 8-pin TDFN package, while the MAX38902C/D are offered in a 2 x 3, 0.4mm wafer-level package (WLP).

Design Solution: Modern Portable Devices Require a New Breed of LDOs ›

Mobile App

Simplified Block Diagram

MAX38902A, MAX38902B, MAX38902C, MAX38902D: Typical Operating Circuits MAX38902A, MAX38902B, MAX38902C, MAX38902D: Typical Operating Circuits Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal