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Switching Regulator - Switching Regulators 
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MAX17548
42V, Dual-Output, Synchronous Step-Down Controller
Wide Input Voltage, Dual-Output Controller Enables Design Flexibility for Industrial Applications
MyMaxim SubscriptionsProduct Details
Key Features
Applications/Uses
Parametric specs for Step-Down Switching Regulators
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 42 |
| VOUT1 (V) (min) | 0.8 |
| VOUT1 (V) (max) | 24 |
| IOUT1 (A) (max) | 25 |
| Switch Type | External |
| Output Adjust. Method | Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| # DC-DC Outputs | 2 |
| Switching Frequency (kHz) | 2200 |
| Design Tools | EE-Sim |
| Package/Pins | TQFN/32 |
| Budgetary Price (See Notes) | 3.22 |
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Simplified Block Diagram
Technical Docs
| Data Sheet | 42V, Dual-Output, Synchronous Step-Down Controller | Sep 25, 2017 |
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) | 4.5 |
| VIN (V) (max) | 42 |
| VOUT1 (V) (min) | 0.8 |
| VOUT1 (V) (max) | 24 |
| IOUT1 (A) (max) | 25 |
| Switch Type | External |
| Output Adjust. Method | Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| # DC-DC Outputs | 2 |
| Switching Frequency (kHz) | 2200 |
| Design Tools | generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=8888', '') |
| Package/Pins | TQFN/32 |
| Budgetary Price (See Notes) | 3.22 |
Key Features
- Wide Range of Operation
- Wide 4.5V to 42V Input Voltage Range
- Wide 0.8V to 24V Output Voltage Range
- RSENSE or Inductor DCR Current Sensing
- Selectable In-Phase or 180° Out-of-Phase Operation
- Adjustable 100kHz to 2.2MHz Switching Frequency
- Independent Enable and PGOOD
- Available in a Lead(Pb)-Free 32-Pin, 5mm x 5mm TQFN-EP Package
- Enhances Power Efficiency
- Low-Impedance Gate Drives for High Efficiency
- DCM Operation at Light Loads
- Auxiliary Bootstrap LDO
- Operates Reliably in Adverse Industrial Environments
- Independent Adjustable Soft-Start or Tracking
- Current Foldback Limits MOSFET Heat Dissipation During a Short-Circuit Condition
- Operates Over the -40°C to +125°C Temperature Range
- Output Overvoltage and Overtemperature Protections
Applications/Uses
- Computerized Numerical Control
- Distributed DC Power Systems
- Industrial Power Supplies
- Motion Control
- Programmable Logic Controllers
Description
The MAX17548 is a dual-output, synchronous step-down controller that drives nMOSFETs.
The device features a peak-current-mode, constant frequency architecture, allowing it to operate up to 2.2MHz. The device can be configured as two single-phase, independent 10A power supplies or as a dualphase, single-output 20A power supply. The device also provides the ability to run two controllers 180° out-of-phase to reduce the power loss and noise due to the input-capacitor ESR.
The IC supports current sensing using either an external current-sense resistor for accuracy or an inductor DCR for improved system efficiency. Current foldback limits MOSFET power dissipation under short-circuit conditions.
The IC provides independent adjustable soft-start for each output and can start up monotonically into a prebiased output. The IC can be configured in either PWM or DCM modes of operation, depending on whether constant-frequency operation or light-load efficiency is desired.
The IC operates over the -40°C to +125°C temperature range and is available in a lead(Pb)-free, 32-pin TQFN, 5mm x 5mm package with an exposed pad.
The device features a peak-current-mode, constant frequency architecture, allowing it to operate up to 2.2MHz. The device can be configured as two single-phase, independent 10A power supplies or as a dualphase, single-output 20A power supply. The device also provides the ability to run two controllers 180° out-of-phase to reduce the power loss and noise due to the input-capacitor ESR.
The IC supports current sensing using either an external current-sense resistor for accuracy or an inductor DCR for improved system efficiency. Current foldback limits MOSFET power dissipation under short-circuit conditions.
The IC provides independent adjustable soft-start for each output and can start up monotonically into a prebiased output. The IC can be configured in either PWM or DCM modes of operation, depending on whether constant-frequency operation or light-load efficiency is desired.
The IC operates over the -40°C to +125°C temperature range and is available in a lead(Pb)-free, 32-pin TQFN, 5mm x 5mm package with an exposed pad.
Technical Docs
| Data Sheet | 42V, Dual-Output, Synchronous Step-Down Controller | Sep 25, 2017 |
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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