MAX20059
72V, 1A, Automotive Synchronous Step-Down DC-DC Converter
72V Synchronous Buck Converter with Internal FETs Enables High Efficiency and Low Temperature Rise
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The MAX20059 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter IC with integrated MOSFETs that operates over a 4.5V to 72V input. The converters can deliver up to 1A current. Output voltage is programmable from 0.8V to 90%VIN. The feedback voltage-regulation accuracy over -40°C to +125°C is ±1.5%.
The IC features a peak-current-mode-control architecture and can be operated in the pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes.
The MAX20059 is available in a 12-pin (3mm x 3mm) side-wettable TDFN package with an exposed pad for thermal heat dissipation.
Key Features
- Synchronous DC-DC Converters with Integrated FETs
- 72V Input for 48V Systems
- Internal Compensation
- Flexibility
- Output Adjustable from 0.8V to 90%VIN
- 200kHz to 2200kHz Adjustable Frequency with External Clock Synchronization
- Programmable Peak Current Limit (1.14A or 1.6A)
- Active-Low RESET Output and EN Input (26V max) Simplify Power Sequencing
- Protection Features and Operating Range Ideal for Automotive Applications
- Programmable EN/UVLO Threshold
- Adjustable Soft-Start and Prebiased Power-Up
- Thermal Shutdown
- -40°C to +125°C Automotive Temperature Range
- AEC-Q100 Qualified
Applications/Uses
- 48V Systems
- Mild Hybrid Applications
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 76 |
| VOUT1 (V) (min) | 0.8 |
| VOUT1 (V) (max) | 18 |
| IOUT1 (A) (max) | 1 |
| Switch Type | Internal |
| Output Adjust. Method | Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 750 800 900 1200 1700 2000 220 250 275 300 330 350 400 440 500 540 560 600 700 2200 |
| Design Tools | EE-Sim |
| Package/Pins | TDFN/12 |
Technical Docs
| Data Sheet | 72V, 1A, Automotive Synchronous Step-Down DC-DC Converter | Mar 31, 2020 | |
| App Note | How to Use the MAX20058 and MAX20059 for Negative Output Voltage Applications | ||
| Design Solution | 48V Buck Converter Helps MHEVs Meet Fuel Emission Standards |
Click any title below to view the detail page where available.
Description
The MAX20059 EV kit is a proven design to evaluate the MAX20059 high-efficiency, high-voltage, synchronous step-down DC-DC converter IC in a TDFN package. The EV kit is optimized to generate a 5V output at load currents up to 1A from a 48V input supply, and can be reconfigured to meet other system requirements. The EV kit features a 400kHz switching frequency. The EV kit can be used to monitor the IC’s features, such as adjustable input undervoltage lockout, adjustable soft-start, adjustable switching frequency, adjustable current limit, open-drain active-low RESET signal, and external frequency synchronization.
View DetailsFeatures
- Operates from 6.5V to 72V at 48V Nominal Input
- Meets Stringent OEM Module Power Consumption and Performance Specifications
- 5V Output Voltage at 400kHz Switching Frequency
- Up to 1A Output Current with Adjustable Peak- Current Limit
- Jumpers for Quickly Adjusting Peak-Current Limit and Mode Selection
- Auxiliary Bootstrap LDO to Improve Efficiency
- Adjustable Soft-Start Time with External Capacitor
- Optimized Application Layout and Components for Quick Design Implementation
- Proven PCB Layout
- Fully Assembled and Tested
 | Tools & Models EE-Sim: Design & Simulate MAX20059 | Create Design |
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
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 76 |
| VOUT1 (V) (min) | 0.8 |
| VOUT1 (V) (max) | 18 |
| IOUT1 (A) (max) | 1 |
| Switch Type | Internal |
| Output Adjust. Method | Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 750 800 900 1200 1700 2000 220 250 275 300 330 350 400 440 500 540 560 600 700 2200 |
| Design Tools | EE-Sim |
| Package/Pins | TDFN/12 |
Key Features
- Synchronous DC-DC Converters with Integrated FETs
- 72V Input for 48V Systems
- Internal Compensation
- Flexibility
- Output Adjustable from 0.8V to 90%VIN
- 200kHz to 2200kHz Adjustable Frequency with External Clock Synchronization
- Programmable Peak Current Limit (1.14A or 1.6A)
- Active-Low RESET Output and EN Input (26V max) Simplify Power Sequencing
- Protection Features and Operating Range Ideal for Automotive Applications
- Programmable EN/UVLO Threshold
- Adjustable Soft-Start and Prebiased Power-Up
- Thermal Shutdown
- -40°C to +125°C Automotive Temperature Range
- AEC-Q100 Qualified
Applications/Uses
- 48V Systems
- Mild Hybrid Applications
Description
The MAX20059 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter IC with integrated MOSFETs that operates over a 4.5V to 72V input. The converters can deliver up to 1A current. Output voltage is programmable from 0.8V to 90%VIN. The feedback voltage-regulation accuracy over -40°C to +125°C is ±1.5%.
The IC features a peak-current-mode-control architecture and can be operated in the pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes.
The MAX20059 is available in a 12-pin (3mm x 3mm) side-wettable TDFN package with an exposed pad for thermal heat dissipation.
Technical Docs
| Data Sheet | 72V, 1A, Automotive Synchronous Step-Down DC-DC Converter | Mar 31, 2020 | |
| App Note | How to Use the MAX20058 and MAX20059 for Negative Output Voltage Applications | ||
| Design Solution | 48V Buck Converter Helps MHEVs Meet Fuel Emission Standards |
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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