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5.5V Input, 4.4A/3.6A Switching Current 6μA IQ Buck-Boost Converter

4.4A Buck-Boost Converter with Lowest IQ

产品详情

主要特征

Parametric specs for Step-Down/Up Switching Regulators
VIN (V) (min) 1.8
VIN (V) (max) 5.5
VOUT1 (V) (min) 2.3
VOUT1 (V) (max) 5.3
IOUT1 (A) (max) 2.5
Switch Type Internal
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Alternate Topology Buck-Boost
Step-Up/Down
Design Tools EE-Sim
Package/Pins WLP HC/15
Oper. Temp. (°C) -40 to +125
Budgetary
Price (See Notes)
0.68
缩小

简化框图

Technical Docs

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参量

Parametric specs for Step-Down/Up Switching Regulators
VIN (V) (min) 1.8
VIN (V) (max) 5.5
VOUT1 (V) (min) 2.3
VOUT1 (V) (max) 5.3
IOUT1 (A) (max) 2.5
Switch Type Internal
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Alternate Topology Buck-Boost
Step-Up/Down
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=25864', '')
Package/Pins WLP HC/15
Oper. Temp. (°C) -40 to +125
Budgetary
Price (See Notes)
0.68

主要特征

  • Flexible System Integration
    • 1.8V to 5.5V Input Voltage Range
    • 2.3V to 5.3V Single Resistor Adjustable Output
    • 3.6A ILIM ("C" and "D" options) or 4.4A ILIM ("A" and "B" options)
    • 3A Maximum Output Current (4.4A ILIM, Buck Mode)
    • 3A Maximum Output Current (4.4A ILIM, Boost Mode 3.0VIN, 3.3VOUT)
    • 96% Peak Efficiency (VIN = 3.6V, VOUT = 3.3V)
    • Optional GPIO Pin (FPWM input, Active-Low POK output)
  • Low Supply Current that Extends Battery Life
    • Skip Mode that Reduces Supply Current at Light Loads
    • 6μA Ultra-Low IQ
  • 2.2MHz (typ) Switching Frequency
  • Integrated Protections that Provide System Robustness
    • Undervoltage Lockout (UVLO)
    • Overvoltage Protection (OVP)
    • Cycle-by-Cycle Inductor Peak Current Limit
    • Thermal Shutdown (TSHDN)
  • Active Output Discharge
  • Small Solution Size
    • 2.07mm x 1.51mm, 0.4mm Pitch, 15-Bump WLP
    • 2.5mm x 2.0mm, 0.5mm Pitch, 11-Pin FC2QFN

应用/用途

  • Asset Tracking/Fleet Management
  • 5G/2G/GSM Cellular Power
  • RF Amplifier
  • Smartphones ToF/Facial and Gesture Recognition
  • System Power Pre-Regulation
  • Single-Cell Li-ion Battery Powered Devices

描述

The MAX77839 is a highly-efficient buck-boost regulator with an industry leading quiescent current of 6μA targeted for one-cell Li-ion and down to any battery chemistry with 1.8V discharge voltage. It supports input voltages of 1.8V to 5.5V and an output voltage range of 2.3V to 5.3V. The IC provides two different switching current limits to optimize external component sizing based on given load current requirements. The MAX77839 supports two different switching current options ("A" and "B" =  4.4A (typ), "C" and "D" = 3.6A (typ)), and two different GPIO pin configurations ("A" and "C" = FPWM pin,"B" and "D" = POK pin). These options provide design flexibility that allow the IC to cover a wide range of applications and use cases while minimizing board space.

The IC features a single-resistor adjustable output voltage from 2.3V to 5.3V. A configurable GPIO pin allows to select either a FPWM mode control input or an active-low POK open drain output, depending on the system requirements. Maxim's unique buck-boost controller technology provides high efficiency, excellent load and line transient response, and a seamless transition between buck and boost modes of operation.

The MAX77839 is available in either a 2.07mm x 1.51mm, 15-bump wafer-level package (WLP), and a 2.5mm x 2.0mm, 11-lead FC2QFN package.

简化框图

MAX77839: Functional Block Diagram MAX77839: Functional Block Diagram Zoom icon

Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心