MAX17574
4.5V–60V, 3A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation
Industry's Only 60V, 3A Internal FET Synchronous Buck Converter
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The MAX17574, high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input. The converter can deliver up to 3A current. Output voltage is programmable from 0.9V up to 90%VIN. The feedback voltage regulation accuracy over -40°C to +125°C is ±0.9%.
The MAX17574 features a peak-current-mode control architecture. The device can be operated in the pulse-width modulation (PWM), pulse-frequency modulation (PFM) or discontinuous-conduction mode (DCM) control schemes. A programmable soft-start feature allows users to reduce input inrush current. The device also incorporates an output enable/undervoltage lockout pin (EN/UVLO) that allows the user to turn on the part at the desired input voltage level. An open-drain active-low RESET pin provides a delayed power-good signal to the system upon achieving successful regulation of the output voltage.
The MAX17574 is available in a 24-pin (4mm x 5mm) TQFN package. Simulation models are available.
Design Solution: Design 20W–30W Power Supplies with Over 90% Efficiency for 24V+ Industrial Automation Systems ›Key Features
- Reduces External Components and Total Cost
- No Schottky-Synchronous Operation
- Internal Compensation for Any Output Voltage
- All-Ceramic Capacitors, Compact Layout
- Reduces Number of DC-DC Regulators to Stock
- Wide 4.5V to 60V Input
- Adjustable Output Voltage Range from 0.9V up to 90% of VIN
- Delivers up to 3A Current Over Temperature
- 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
- Reduces Power Dissipation
- Peak Efficiency > 90%
- PFM and DCM Modes Enable Enhanced Light-Load Efficiency
- Auxiliary Bootstrap LDO for Improved Efficiency
- 2.8μA Shutdown Current
- Operates Reliably in Adverse Industrial Environments
- Hiccup Mode Overload Protection
- Adjustable Soft-Start and Prebiased Power-Up
- Built-In Output-Voltage Monitoring with Active-Low RESET
- Programmable EN/UVLO Threshold
- Monotonic Startup Into Prebiased Load
- Overtemperature Protection
- High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range
Applications/Uses
- Base Station Power Supplies
- Distributed Supply Regulation
- General-Purpose Point-of-Load
- High-Voltage, Single-Board Systems
- Industrial Control Power Supplies
- Wall Transformer Regulation
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 60 |
| VOUT1 (V) (min) | 0.9 |
| VOUT1 (V) (max) | 54 |
| IOUT1 (A) (max) | 3 |
| Switch Type | Internal |
| Output Adjust. Method | Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 2200 |
| Design Tools | EE-Sim |
| Package/Pins | TQFN/24 |
| Budgetary Price (See Notes) | $2.30 @1k |
Technical Docs
| Data Sheet | 4.5V–60V, 3A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation | Aug 07, 2018 |
Click any title below to view the detail page where available.
Description
The MAX17574 3.3V output evaluation kit (EV kit) provides a proven design to evaluate the MAX17574 high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 3.3V output at load currents up to 3A and features a 500kHz switching frequency for optimum efficiency and component size. The EV kit features adjustable input undervoltage lockout, adjustable soft-start, open-drain active-low RESET signal, and external frequency synchronization.
View DetailsFeatures
- Operates from a 5V to 60V Input Supply
- 3.3V Output Voltage
- Up to 3A Output Current
- 500kHz Switching Frequency
- Enable/UVLO Input, Resistor-Programmable UVLO Threshold
- Adjustable Soft-Start Time
- MODE/SYNC Pin to Select Among PWM, PFM, or DCM Modes
- Open-Drain Active-Low RESET Output
- External Frequency Synchronization
- Overcurrent and Overtemperature Protection
- Proven PCB Layout
- Fully Assembled and Tested
Description
The MAX17574 5V output evaluation kit (EV kit) provides a proven design to evaluate the MAX17574 high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 5V output at load currents up to 3A and features a 500kHz switching frequency for optimum efficiency and component size. The EV kit features adjustable input undervoltage lockout, adjustable soft-start, open-drain active-low RESET signal, and external frequency synchronization.
View DetailsFeatures
- Operates from a 6.5V to 60V Input Supply
- 5V Output Voltage
- Up to 3A Output Current
- 500kHz Switching Frequency
- Enable/UVLO Input, Resistor-Programmable UVLO Threshold
- Adjustable Soft-Start Time
- MODE/SYNC Pin to Select Among PWM, PFM, or DCM Modes
- Open-Drain Active-Low RESET Output
- External Frequency Synchronization
- Overcurrent and Overtemperature Protection
- Proven PCB Layout
- Fully Assembled and Tested
Description
The MAX17574EVKITBE# evaluation kit (EV kit) provides a proven design to evaluate the MAX17574 high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 5V output at load currents up to 3A and features a 500kHz switching frequency for optimum efficiency and component size. The EV kit features adjustable input undervoltage lockout, adjustable soft-start, open-drain active-low RESET signal, and external clock synchronization. The EV kit also provides a good layout example, which is optimized for conducted, radiated EMI, and thermal performance. For more details about the IC benefits and features, refer to the MAX17574 IC data sheet.
View DetailsFeatures
- Operates from a 6.5V to 60V Input Supply
- Programmed 5V Output Voltage, 3A Load Current
- 500kHz Switching Frequency
- Enable/UVLO Input, Resistor-Programmable UVLO Threshold
- Adjustable Soft-Start Time
- MODE/SYNC Pin to Select Among PWM, PFM, or DCM Modes
- Open-Drain Active-Low RESET Output
- External Clock Synchronization
- Overcurrent and Overtemperature Protection
- Proven PCB Layout
- Fully Assembled and Tested
- Complies with CISPR22(EN55022) Class B Conducted and Radiated Emissions
 | Tools & Models EE-Sim: Design & Simulate MAX17574 | Create Design |
| SIMULATION MODELS MAX17574 SIMPLIS Schematic | Download |
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) | 60 |
| VOUT1 (V) (min) | 0.9 |
| VOUT1 (V) (max) | 54 |
| IOUT1 (A) (max) | 3 |
| Switch Type | Internal |
| Output Adjust. Method | Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 2200 |
| Design Tools | EE-Sim |
| Package/Pins | TQFN/24 |
| Budgetary Price (See Notes) | $2.30 @1k |
Key Features
- Reduces External Components and Total Cost
- No Schottky-Synchronous Operation
- Internal Compensation for Any Output Voltage
- All-Ceramic Capacitors, Compact Layout
- Reduces Number of DC-DC Regulators to Stock
- Wide 4.5V to 60V Input
- Adjustable Output Voltage Range from 0.9V up to 90% of VIN
- Delivers up to 3A Current Over Temperature
- 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
- Reduces Power Dissipation
- Peak Efficiency > 90%
- PFM and DCM Modes Enable Enhanced Light-Load Efficiency
- Auxiliary Bootstrap LDO for Improved Efficiency
- 2.8μA Shutdown Current
- Operates Reliably in Adverse Industrial Environments
- Hiccup Mode Overload Protection
- Adjustable Soft-Start and Prebiased Power-Up
- Built-In Output-Voltage Monitoring with Active-Low RESET
- Programmable EN/UVLO Threshold
- Monotonic Startup Into Prebiased Load
- Overtemperature Protection
- High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range
Applications/Uses
- Base Station Power Supplies
- Distributed Supply Regulation
- General-Purpose Point-of-Load
- High-Voltage, Single-Board Systems
- Industrial Control Power Supplies
- Wall Transformer Regulation
Description
The MAX17574, high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input. The converter can deliver up to 3A current. Output voltage is programmable from 0.9V up to 90%VIN. The feedback voltage regulation accuracy over -40°C to +125°C is ±0.9%.
The MAX17574 features a peak-current-mode control architecture. The device can be operated in the pulse-width modulation (PWM), pulse-frequency modulation (PFM) or discontinuous-conduction mode (DCM) control schemes. A programmable soft-start feature allows users to reduce input inrush current. The device also incorporates an output enable/undervoltage lockout pin (EN/UVLO) that allows the user to turn on the part at the desired input voltage level. An open-drain active-low RESET pin provides a delayed power-good signal to the system upon achieving successful regulation of the output voltage.
The MAX17574 is available in a 24-pin (4mm x 5mm) TQFN package. Simulation models are available.
Technical Docs
| Data Sheet | 4.5V–60V, 3A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation | Aug 07, 2018 |
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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