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350mA, 16.5V Input, Low-Dropout Linear Regulators

Battery-Saving Linear Regulator Consumes Only 30µA and Delivers 350mA

Product Details

The MAX1658/MAX1659 linear regulators maximize battery life by combining ultra-low supply currents and low dropout voltages. They feature Dual Mode™ operation, which presets the output to 3.3V (MAX1658) or 5V (MAX1659), or permits it to be adjusted between 1.25V and 16V. The regulator supplies up to 350mA, with a typical dropout of 650mV for the MAX1658 and 490mV for the MAX1659. With their p-channel MOSFET pass transistor, these devices maintain a low quiescent current from zero output current to the full 350mA, even in dropout. They support input voltages ranging from 2.7V to 16.5V.

The MAX1658/MAX1659 feature a 1µA shutdown mode, reverse battery protection, short-circuit protection, and thermal shutdown. They are available in a special high-power (1.2W), 8-pin SO package designed specifically for compact applications.

Key Features

  • Wide Input Voltage Range: 2.7V to 16.5V
  • Low, 490mV Dropout at 350mA Output Current (MAX1659)
  • 30µA Supply Current
  • 1µA Max Shutdown Current
  • High-Power (1.2W) 8-Pin SO Package
  • Dual Mode Operation Output:
    • Fixed 3.3V (MAX1658)
    • Fixed 5.0V (MAX1659)
    • or Adjustable (1.25V to 16V)
  • Thermal Overload Protection
  • Current-Limit Protection
  • Reverse Battery Protection

Applications/Uses

  • Cell Phones
  • Digital Cordless Phones
  • Electronic Planners
  • Handheld Instruments (PDAs, Palmtops)
  • Modems
  • Palmtop Computers
  • PCMCIA Cards
  • PCS Phones
Parametric specs for Linear Regulators
VIN (V) (min) 2.7
VIN (V) (max) 16.5
Adj. VOUT (V) (min) 1.25
Adj. VOUT (V) (max) 16
Rated ILOAD (mA) 350
Preset VOUT (V) 5
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.65
ICC (µA) (max) 60
Output Voltage Noise (µV RMS) (typ) 2500
Ref. Bypass No
Low Batt./ Pwr. Fail Out No
Watchdog No
Reverse Batt. Protect. Yes
Oper. Temp. (°C) -40 to +85
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
$2.28 @1k
View More

Simplified Block Diagram

MAX1658, MAX1659: Typical Operating Circuit MAX1658, MAX1659: Typical Operating Circuit Zoom icon

Technical Docs

Data Sheet 350mA, 16.5V Input, Low-Dropout Linear Regulators Jul 25, 2014
User Guide Alameda (MAXREFDES24#) ZedBoard Quick Start Guide
User Guide Alameda (MAXREFDES24#) LX9 Quick Start Guide
User Guide Petaluma (MAXREFDES30#) ZedBoard Quick Start Guide
Sub-System Board Petaluma (MAXREFDES30#): 8-Channel Simultaneous-Sampling Analog Front End
User Guide Fremont (MAXREFDES6#) ZedBoard Quick Start Guide
User Guide Fremont (MAXREFDES6#) Nexys 3 Quick Start Guide
User Guide Carmel (MAXREFDES18#) ZedBoard Quick Start Guide
User Guide Carmel (MAXREFDES18#) LX9 Quick Start Guide
Sub-System Board Carmel (MAXREFDES18#): High Accuracy Analog Current/Voltage Output
Sub-System Board Fremont (MAXREFDES6#): 16-Bit, High-Accuracy, 0 to 100mV Input, Isolated Analog Front-End (AFE)
User Guide Campbell (MAXREFDES4#) ZedBoard Quick Start Guide
User Guide Santa Fe (MAXREFDES5#) ZedBoard Quick Start Guide
User Guide Fresno (MAXREFDES11#) ZedBoard Quick Start Guide
User Guide Campbell (MAXREFDES4#) Nexys 3 Quick Start Guide
User Guide Santa Fe (MAXREFDES5#) Nexys 3 Quick Start Guide
Sub-System Board Fresno (MAXREFDES11#): 16-Bit High-Accuracy 0 to 10V Input Isolated Analog Front End (AFE)
Sub-System Board Campbell (MAXREFDES4#): 16-Bit High-Accuracy 4-20mA Input Isolated Analog Front End (AFE)
Sub-System Board Santa Fe (MAXREFDES5#): 16-Bit High Accuracy Multi-Input Isolated Analog Front End (AFE)
Sub-System Board Riverside (MAXREFDES8#): 3.3V Input, 12V (15V) Output Isolated Power Supply
Sub-System Board Lakewood (MAXREFDES7#): 3.3V Input, ±12V (±15V) Output Isolated Power Supply
Sub-System Board Oceanside (MAXREFDES9#): 3.3V to 15V Input, ±15V (±12V) Output, Isolated Power Supply

Design & Development

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

Description

The MAXSANTAFEEVSYS kit allows users to quickly demonstrate and evaluate the functionality of the MAXREFDES5 4-channel 16-bit, isolated analog front end (AFE) reference design without the need for a bench power supply, signal generator equipment, or Xilinx development kit. The reference design board connects to a PC through an included USB-to-SPI adapter that provides both power and data communication to the board. To test the AFE reference design, a USB-powered signal generator board utilizing one of Maxim’s digital-to-analog converters (DAC) is also included. A Windows®-based graphical user interface (GUI) communicates with the boards for generating various analog signal test patterns and simplified access to AFE measurement data.

MAXSANTAFEEVSYS User Manual is available for download.

The MAXREFDES5 reference design is a 4-channel analog front end (AFE) that accepts -10V to +10V, 0V to 10V, and 4–20mA current loop signals. The design integrates a 16-bit ADC with multirange input programmability (MAX1301) plus low-noise, high-impedance analog buffers (MAX9632) on two of the input channels and an ultra-high precision 4.096V voltage reference (MAX6126) to achieve maximum performance from the 16-bit system. A 600VRMS digital isolator (MAX14850) and 3W transformer driver (MAX256) provide the necessary isolated data and power connections to the host system. LDO regulators (MAX1659) provide regulated +12V, -12V, and 5V power rails to the analog front end.

EV Kit Contents
  • MAXREFDES5 4-Channel AFE Board
  • USB2PMB1 USB to Pmod Type 2A Adapter Board
  • MAX5216DACLITE Signal Generator Board
  • Two (2) Wires with Hook Clips (1 Red and 1 Black)
  • Two (2) USB Type A Male to USB Type B Mini Cables
  • USB Flash Drive with Documentation, GUI Applications, and USB Drivers

View Details

Features

  • Self-Contained Easy Evaluation Kit for MAXREFDES5
  • Optimized AFE with Common Analog Input Ranges
  • Small Form Factor Test Platform
  • All Relevant Reference Design Files Included

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Support & Training

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

Parameters

Parametric specs for Linear Regulators
VIN (V) (min) 2.7
VIN (V) (max) 16.5
Adj. VOUT (V) (min) 1.25
Adj. VOUT (V) (max) 16
Rated ILOAD (mA) 350
Preset VOUT (V) 5
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.65
ICC (µA) (max) 60
Output Voltage Noise (µV RMS) (typ) 2500
Ref. Bypass No
Low Batt./ Pwr. Fail Out No
Watchdog No
Reverse Batt. Protect. Yes
Oper. Temp. (°C) -40 to +85
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
$2.28 @1k

Key Features

  • Wide Input Voltage Range: 2.7V to 16.5V
  • Low, 490mV Dropout at 350mA Output Current (MAX1659)
  • 30µA Supply Current
  • 1µA Max Shutdown Current
  • High-Power (1.2W) 8-Pin SO Package
  • Dual Mode Operation Output:
    • Fixed 3.3V (MAX1658)
    • Fixed 5.0V (MAX1659)
    • or Adjustable (1.25V to 16V)
  • Thermal Overload Protection
  • Current-Limit Protection
  • Reverse Battery Protection

Applications/Uses

  • Cell Phones
  • Digital Cordless Phones
  • Electronic Planners
  • Handheld Instruments (PDAs, Palmtops)
  • Modems
  • Palmtop Computers
  • PCMCIA Cards
  • PCS Phones

Description

The MAX1658/MAX1659 linear regulators maximize battery life by combining ultra-low supply currents and low dropout voltages. They feature Dual Mode™ operation, which presets the output to 3.3V (MAX1658) or 5V (MAX1659), or permits it to be adjusted between 1.25V and 16V. The regulator supplies up to 350mA, with a typical dropout of 650mV for the MAX1658 and 490mV for the MAX1659. With their p-channel MOSFET pass transistor, these devices maintain a low quiescent current from zero output current to the full 350mA, even in dropout. They support input voltages ranging from 2.7V to 16.5V.

The MAX1658/MAX1659 feature a 1µA shutdown mode, reverse battery protection, short-circuit protection, and thermal shutdown. They are available in a special high-power (1.2W), 8-pin SO package designed specifically for compact applications.

Simplified Block Diagram

MAX1658, MAX1659: Typical Operating Circuit MAX1658, MAX1659: Typical Operating Circuit Zoom icon

Technical Docs

Data Sheet 350mA, 16.5V Input, Low-Dropout Linear Regulators Jul 25, 2014
User Guide Alameda (MAXREFDES24#) ZedBoard Quick Start Guide
User Guide Alameda (MAXREFDES24#) LX9 Quick Start Guide
User Guide Petaluma (MAXREFDES30#) ZedBoard Quick Start Guide
Sub-System Board Petaluma (MAXREFDES30#): 8-Channel Simultaneous-Sampling Analog Front End
User Guide Fremont (MAXREFDES6#) ZedBoard Quick Start Guide
User Guide Fremont (MAXREFDES6#) Nexys 3 Quick Start Guide
User Guide Carmel (MAXREFDES18#) ZedBoard Quick Start Guide
User Guide Carmel (MAXREFDES18#) LX9 Quick Start Guide
Sub-System Board Carmel (MAXREFDES18#): High Accuracy Analog Current/Voltage Output
Sub-System Board Fremont (MAXREFDES6#): 16-Bit, High-Accuracy, 0 to 100mV Input, Isolated Analog Front-End (AFE)
User Guide Campbell (MAXREFDES4#) ZedBoard Quick Start Guide
User Guide Santa Fe (MAXREFDES5#) ZedBoard Quick Start Guide
User Guide Fresno (MAXREFDES11#) ZedBoard Quick Start Guide
User Guide Campbell (MAXREFDES4#) Nexys 3 Quick Start Guide
User Guide Santa Fe (MAXREFDES5#) Nexys 3 Quick Start Guide
Sub-System Board Fresno (MAXREFDES11#): 16-Bit High-Accuracy 0 to 10V Input Isolated Analog Front End (AFE)
Sub-System Board Campbell (MAXREFDES4#): 16-Bit High-Accuracy 4-20mA Input Isolated Analog Front End (AFE)
Sub-System Board Santa Fe (MAXREFDES5#): 16-Bit High Accuracy Multi-Input Isolated Analog Front End (AFE)
Sub-System Board Riverside (MAXREFDES8#): 3.3V Input, 12V (15V) Output Isolated Power Supply
Sub-System Board Lakewood (MAXREFDES7#): 3.3V Input, ±12V (±15V) Output Isolated Power Supply
Sub-System Board Oceanside (MAXREFDES9#): 3.3V to 15V Input, ±15V (±12V) Output, Isolated Power Supply

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