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Switching Regulators 
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MAX77756
24V Input, 500mA Buck Regulator with Dual-Input Power MUX
Wide VIN Range, Low IQ Buck Integrates Ideal Diode ORing and Optional I2C Programmability
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Key Features
Applications/Uses
Parametric specs for Step-Down Switching Regulators
| VIN (V) (min) | 3 |
| VIN (V) (max) | 24 |
| VOUT1 (V) (min) | 1.5 |
| VOUT1 (V) (max) | 7.5 |
| IOUT1 (A) (max) | 0.5 |
| Switch Type | Internal |
| Preset VOUT (V) | 5 |
| Output Adjust. Method | Digital/VID Preset |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 1000 |
| Design Tools | EE-Sim |
| Package/Pins | WLP/15 |
| Budgetary Price (See Notes) | 0.49 |
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Simplified Block Diagram
Technical Docs
| Data Sheet | 24V Input, 500mA Buck Regulator with Dual-Input Power MUX | Nov 08, 2017 | |
| solutionguides | USB-C and USB Power Delivery Solutions |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Parameters
Parametric specs for Step-Down Switching Regulators
| VIN (V) (min) | 3 |
| VIN (V) (max) | 24 |
| VOUT1 (V) (min) | 1.5 |
| VOUT1 (V) (max) | 7.5 |
| IOUT1 (A) (max) | 0.5 |
| Switch Type | Internal |
| Preset VOUT (V) | 5 |
| Output Adjust. Method | Digital/VID Preset |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 1000 |
| Design Tools | generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=7510', '') |
| Package/Pins | WLP/15 |
| Budgetary Price (See Notes) | 0.49 |
Key Features
- Wide Input Power Supply
- 3V to 24V Supply Voltage
- 500mA (max) Output Current
- 1.8V, 3.3V, or 5.0V Factory-Set VOUT with Optional I2C Control: 1.5V to 7.5V in 50mV Steps
- External Feedback Resistor VOUT Option (1V to 99% VSUP)
- Hardware or Software Enable
- Dual-Input Power MUX Replaces Common-Cathode Diode Arrays
- Automatic Ideal-Diode ORing Voltage Selector
- 250mΩ MOSFETs Minimize Power Consumption, BOM, and Solution Size
- Low IQ Enables Always-On Rails
- 1.5µA Quiescent Current (Only SUP Powered)
- 19µA Quiescent Current (IN1/IN2 Powered)
- 88% Peak Efficiency (12VSUP, 3.3VOUT)
- Safe and Easy to Use
- Short-Circuit and Thermal Protection
- 8ms Soft-Start
- Software-Enabled Spread Spectrum
- Pin-Programmable Inductor Peak Current Level
- Small Size
- 2.33mm × 1.42mm (0.7mm max height) Wafer-Level Package (WLP)
- 15-Bump, 0.4mm Pitch, 3 × 5 Array
Applications/Uses
- Battery-Powered Systems, Backup Battery, Uninterruptible Rails
- Home Automation, Low IQ Smart Hubs
- Notebook and Tablet Computers
- USB Type-C Power Delivery Accessories and Devices
Description
The MAX77756 is a synchronous 500mA step-down DC-DC converter with integrated dual-input power multiplexer (MUX). The converter operates on an input supply as low as 3.0V and as high as 24V. Default output voltage is factory-programmed to either 1.8V, 3.3V, or 5.0V. Output voltage is further adjustable through external resistors or an I2C serial interface.
The dual-input power MUX selects the higher voltage from two different input sources to power the step-down converter. Control circuitry ensures that only one channel of the MUX is on at a time to prevent cross-conduction between input sources. For single-input applications, the MUX can be bypassed and the step-down converter can be powered directly from the SUP pin.
The MAX77756 is available in a small 2.33mm × 1.42mm (0.7mm max height), 15-bump wafer-level package (WLP). For a similar buck converter without a power MUX, refer to the MAX77596.
The dual-input power MUX selects the higher voltage from two different input sources to power the step-down converter. Control circuitry ensures that only one channel of the MUX is on at a time to prevent cross-conduction between input sources. For single-input applications, the MUX can be bypassed and the step-down converter can be powered directly from the SUP pin.
The MAX77756 is available in a small 2.33mm × 1.42mm (0.7mm max height), 15-bump wafer-level package (WLP). For a similar buck converter without a power MUX, refer to the MAX77596.
Design Solution: Pack More Power in Your Cool, Small Smart-Home Hub ›
Technical Docs
| Data Sheet | 24V Input, 500mA Buck Regulator with Dual-Input Power MUX | Nov 08, 2017 | |
| solutionguides | USB-C and USB Power Delivery Solutions |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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