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36V, 300mA, Buck Converter with 1.1μA IQ

Wide VIN Range with Low IQ, High Duty Cycle and Small Solution Size

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3.5
VIN (V) (max) 36
VOUT1 (V) (min) 3.3
VOUT1 (V) (max) 3.3
IOUT1 (A) (max) 0.3
Switch Type Internal
Preset VOUT (V) 3.3
Output Adjust. Method Factory configured
Synchronous Switching? Yes
IQ (mA) (typ) 0.0011
# DC-DC Outputs 1
Switching Frequency (kHz) 1700
Design Tools EE-Sim
Package/Pins TDFN-CU/10
Budgetary
Price (See Notes)
0.52
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3.5
VIN (V) (max) 36
VOUT1 (V) (min) 3.3
VOUT1 (V) (max) 3.3
IOUT1 (A) (max) 0.3
Switch Type Internal
Preset VOUT (V) 3.3
Output Adjust. Method Factory configured
Synchronous Switching? Yes
IQ (mA) (typ) 0.0011
# DC-DC Outputs 1
Switching Frequency (kHz) 1700
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=25993', '')
Package/Pins TDFN-CU/10
Budgetary
Price (See Notes)
0.52

Key Features

  • Flexible Power for Systems That Require a Wide Input Voltage Range
    • VIN Range: 3.5V to 36V
    • Up to 300mA Output Current
    • Fixed 3.3V Output Voltage
    • 98% (Max) Duty Cycle Operation with Low Dropout
    • Operates from 5V, 12V, or 20V USB Type-C Input Power
    • Operates from 2S, 3S, or 4S Li-Ion Battery
  • Minimizes Power Consumption and Extends Battery Life
    • 1.1µA Quiescent Current
    • 86% Peak Efficiency at 12VIN, 3.3VOUT
  • Minimizes Solution Size
    • 1.7MHz Operating Frequency
    • Small 2.0mm x 2.5mm x 0.75mm 10-Pin TDFN Package
  • Robust Solution
    • Short-Circuit, Thermal Protections
    • 6.67ms Internal Soft-Start Minimizes Inrush Current
    • Current-Mode Control Architecture
    • Up to 42V Input Voltage Tolerance

Applications/Uses

  • Portable Devices Powered from 2s, 3s, or 4s Li+ Batteries
  • USB Type-C Devices
  • Point-of-Load Applications

Description

The MAX77597 is a small, synchronous buck converter with integrated switches. The device is designed to deliver up to 300mA with input voltages from 3.5V to 36V, while using only 1.1µA quiescent current at no load (fixed-output version). Voltage quality can be monitored by observing the active-low RESET signal. The device can operate near dropout by running at 98% duty cycle, making it ideal for battery-powered applications.

The device offers fixed 3.3V. Frequency is fixed at 1.7MHz, which allows for small external components and reduced output ripple. The device offers both forced-PWM and skip modes of operation, with ultra-low quiescent current of 1.1µA in skip mode.

The MAX77597 is available in a small (2mm x 2.5mm) 10-pin TDFN package and operates across the -40°C to +85°C temperature range.

Simplified Block Diagram

MAX77597: Typical Application Circuit MAX77597: Typical Application Circuit 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 .