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60V, 500mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter

60V Synchronous Buck Converter with Internal FETs Enables High Efficiency

Product Details

The MAX17501 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input voltage range. This device is offered in a fixed 3.3V , 5V or adjustable output voltage (0.9V to 92%VIN) while delivering up to 500mA of current. The output voltage is accurate to within ±1.7% over -40°C to +125°C. The MAX17501 is available in a compact TDFN package. Simulation models are available.

The device features peak-current-mode control with pulse-width modulation (PWM). Users can choose devices with either pulse frequency modulation (PFM) or forced PWM scheme. PFM devices skip pulses at light load for higher efficiency, while forced-PWM devices operate with fixed switching frequency at any load for noise sensitive-applications. The low-resistance, on-chip MOSFETs ensure high efficiency at full load and simplify the layout.

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.

Key Features

  • Eliminates External Components and Reduce Total Cost
    • No Schottky-Synchronous Operation for High Efficiency and Reduced Cost
    • Internal Compensation and Feedback Divider for 3.3V and 5V Fixed Outputs
    • All-Ceramic Capacitors, Ultra-Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 60V Input Voltage Range
    • 0.9V to 92%VIN Adjustable Output Voltage
    • Delivers up to 500mA
    • 600kHz and 300kHz Switching Frequency Options
    • Available in a 10-Pin, 3mm x 2mm TDFN Package
  • Reduces Power Dissipation
    • Peak Efficiency > 90%
    • PFM Feature for High Light-Load Efficiency
    • Shutdown Current = 0.9µA (typ)
  • Operates Reliably in Adverse Industrial Environments
    • Hiccup-Mode Current Limit, Sink Current Limit, and Autoretry Startup
    • Built-In Output-Voltage Monitoring (Open-Drain Active-Low RESET Pin)
    • Resistor-Programmable EN/UVLO Threshold
    • Adjustable Soft-Start and Prebiased Power-Up
    • High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range

Applications/Uses

  • Base Station, VOIP, Telecom
  • Battery-Powered Equipment
  • General-Purpose Point-of-Load
  • Home Theater
  • HVAC and Building Control
  • Industrial Process Control
Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 60
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 55
IOUT1 (A) (max) 0.5
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 600
Design Tools EE-Sim
Package/Pins TDFN/10
Budgetary
Price (See Notes)
$1.60 @1k
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Simplified Block Diagram

MAX17501: Typical Operating Circuit MAX17501: Typical Operating Circuit Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX17501B/MAX17501F evaluation kits (EV kits) provide proven designs to evaluate the MAX17501B/ MAX17501F high-efficiency, high-voltage, synchronous step-down DC-DC converters. The EV kits use these devices to generate a fixed 5V at load currents up to 500mA from a 6V to 60V input supply. The MAX17501B supports a PFM control scheme with high light-load efficiency, while the MAX17501F features a forced-PWM control scheme that provides constant switching-frequency operation at all load and line conditions.

View Details

Features

  • Operates from a 6V to 60V Input Supply
  • 5V Fixed Output Voltage
  • 500mA Output Current
  • 600kHz Switching Frequency
  • Enable/UVLO Input
  • Resistor-Programmable UVLO Threshold
  • Open-Drain Active-Low RESET Output
  • Overcurrent and Overtemperature Protection
  • PFM/PWM (MAX17501B EV Kit)
  • PWM (MAX17501F EV Kit)
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX17501B/MAX17501F evaluation kits (EV kits) provide proven designs to evaluate the MAX17501B/ MAX17501F high-efficiency, high-voltage, synchronous step-down DC-DC converters. The EV kits use these devices to generate a fixed 5V at load currents up to 500mA from a 6V to 60V input supply. The MAX17501B supports a PFM control scheme with high light-load efficiency, while the MAX17501F features a forced-PWM control scheme that provides constant switching-frequency operation at all load and line conditions.

View Details

Features

  • Operates from a 6V to 60V Input Supply
  • 5V Fixed Output Voltage
  • 500mA Output Current
  • 600kHz Switching Frequency
  • Enable/UVLO Input
  • Resistor-Programmable UVLO Threshold
  • Open-Drain Active-Low RESET Output
  • Overcurrent and Overtemperature Protection
  • PFM/PWM (MAX17501B EV Kit)
  • PWM (MAX17501F EV Kit)
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX17501A/MAX17501E evaluation kits (EV kits) provide proven designs to evaluate the MAX17501A/MAX17501E high-efficiency, high-voltage, synchronous step-down DC-DC converters. The EV kits use these devices to generate a fixed 3.3V, at load currents up to 500mA, from a 4.5V to 60V input supply. The MAX17501A supports a PFM control scheme with high light-load efficiency, while the MAX17501E features a forced-PWM control scheme that provides constant switching-frequency operation at all load and line conditions.

View Details

Features

  • Operates from a 4.5V to 60V Input Supply
  • 3.3V Fixed Output Voltage
  • 500mA Output Current
  • 600kHz Switching Frequency
  • Enable/UVLO Input
  • Resistor-Programmable UVLO Threshold
  • Open-Drain Active-Low RESET Output
  • Overcurrent and Overtemperature Protection
  • PFM/PWM (MAX17501A EV Kit)
  • PWM (MAX17501E EV Kit)
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX17501A/MAX17501E evaluation kits (EV kits) provide proven designs to evaluate the MAX17501A/MAX17501E high-efficiency, high-voltage, synchronous step-down DC-DC converters. The EV kits use these devices to generate a fixed 3.3V, at load currents up to 500mA, from a 4.5V to 60V input supply. The MAX17501A supports a PFM control scheme with high light-load efficiency, while the MAX17501E features a forced-PWM control scheme that provides constant switching-frequency operation at all load and line conditions.

View Details

Features

  • Operates from a 4.5V to 60V Input Supply
  • 3.3V Fixed Output Voltage
  • 500mA Output Current
  • 600kHz Switching Frequency
  • Enable/UVLO Input
  • Resistor-Programmable UVLO Threshold
  • Open-Drain Active-Low RESET Output
  • Overcurrent and Overtemperature Protection
  • PFM/PWM (MAX17501A EV Kit)
  • PWM (MAX17501E EV Kit)
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX17501H EV kit provides a proven design to evaluate the MAX17501H high-efficiency, high-voltage, synchronous step-down DC-DC converter in a TDFN package. The EV kit uses the MAX17501H device to generate 2.5V at load currents up to 500mA from a 4.5V to 60V input supply. The MAX17501H features a forced-PWM control scheme that provides constant switching-frequency operation at all load and line conditions.

View Details

Features

  • Operates from a 4.5V to 60V Input Supply
  • 2.5V Output Voltage
  • 500mA Output Current
  • 300kHz Switching Frequency
  • Enable/UVLO Input
  • Resistor-Programmable UVLO Threshold
  • Open-Drain Active-Low RESET Output
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX17501G EV kit provides a proven design to evaluate the MAX17501G high-efficiency, high-voltage, synchronous step-down DC-DC converter in a TDFN package. The EV kit generates 12V at load currents up to 500mA from a 14V to 60V input supply. The EV kit features a 600kHz fixed switching frequency for optimum efficiency and component size. The EV kit features a forced-PWM control scheme that provides constant switching-frequency operation at all load and line conditions.

View Details

Features

  • Operates from a 14V to 60V Input Supply
  • 12V Output Voltage
  • 500mA Output Current
  • 600kHz Switching Frequency
  • Enable/UVLO Input
  • Resistor-Programmable UVLO Threshold
  • Open-Drain Active-Low RESET Output
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX17501GTEVKITE# provides a proven design to evaluate the MAX17501G high-efficiency, high-voltage, synchronous step-down DC-DC converter in a TDFN package. The EV kit generates 5V at load currents up to 500mA from a 6.5V to 60V input supply. The EV kit features a 600kHz fixed switching frequency for optimum efficiency and component size. The EV kit features a forced-PWM control scheme that provides constant switching-frequency operation at all load and line conditions. 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 MAX17501 data sheet.

View Details

Features

  • Operates from a 6.5V to 60V Input Supply
  • Programmed 5V Output Voltage, 500mA Load Current
  • 600kHz Switching Frequency
  • Enable/UVLO Input
  • Resistor-Programmable UVLO Threshold
  • Open-Drain Active-Low RESET Output
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested
  • Complies with CISPR22(EN55022) Class B Conducted and Radiated Emissions

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Tools & Models

EE-Sim: Design & Simulate MAX17501

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Support & Training

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 60
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 55
IOUT1 (A) (max) 0.5
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 600
Design Tools EE-Sim
Package/Pins TDFN/10
Budgetary
Price (See Notes)
$1.60 @1k

Key Features

  • Eliminates External Components and Reduce Total Cost
    • No Schottky-Synchronous Operation for High Efficiency and Reduced Cost
    • Internal Compensation and Feedback Divider for 3.3V and 5V Fixed Outputs
    • All-Ceramic Capacitors, Ultra-Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 60V Input Voltage Range
    • 0.9V to 92%VIN Adjustable Output Voltage
    • Delivers up to 500mA
    • 600kHz and 300kHz Switching Frequency Options
    • Available in a 10-Pin, 3mm x 2mm TDFN Package
  • Reduces Power Dissipation
    • Peak Efficiency > 90%
    • PFM Feature for High Light-Load Efficiency
    • Shutdown Current = 0.9µA (typ)
  • Operates Reliably in Adverse Industrial Environments
    • Hiccup-Mode Current Limit, Sink Current Limit, and Autoretry Startup
    • Built-In Output-Voltage Monitoring (Open-Drain Active-Low RESET Pin)
    • Resistor-Programmable EN/UVLO Threshold
    • Adjustable Soft-Start and Prebiased Power-Up
    • High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range

Applications/Uses

  • Base Station, VOIP, Telecom
  • Battery-Powered Equipment
  • General-Purpose Point-of-Load
  • Home Theater
  • HVAC and Building Control
  • Industrial Process Control

Description

The MAX17501 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input voltage range. This device is offered in a fixed 3.3V , 5V or adjustable output voltage (0.9V to 92%VIN) while delivering up to 500mA of current. The output voltage is accurate to within ±1.7% over -40°C to +125°C. The MAX17501 is available in a compact TDFN package. Simulation models are available.

The device features peak-current-mode control with pulse-width modulation (PWM). Users can choose devices with either pulse frequency modulation (PFM) or forced PWM scheme. PFM devices skip pulses at light load for higher efficiency, while forced-PWM devices operate with fixed switching frequency at any load for noise sensitive-applications. The low-resistance, on-chip MOSFETs ensure high efficiency at full load and simplify the layout.

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.

Simplified Block Diagram

MAX17501: Typical Operating Circuit MAX17501: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal