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60V, 300mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converters

Industry’s Smallest High-Voltage Synchronous Buck Regulator

Product Details

The MAX15062 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input voltage range. The converter delivers output current up to 300mA at 3.3V (MAX15062A), 5V (MAX15062B), and adjustable output voltages (MAX15062C). The device operates over the -40°C to +125°C temperature range and is available in a compact 8-pin (2mm × 2mm) TDFN package. Simulation models are available.

The device employs a peak-current-mode control architecture with a MODE pin that can be used to operate the device in pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. PWM operation provides constant frequency operation at all loads and is useful in applications sensitive to variable switching frequency. PFM operation disables negative inductor current and additionally skips pulses at light loads for high efficiency. The low-resistance on-chip MOSFETs ensure high efficiency at full load and simplify the PCB layout.

To reduce input inrush current, the device offers an internal soft-start. The device also incorporates an EN/UVLO pin that allows the user to turn on the part at the desired input-voltage level. An open-drain active-low RESET pin can be used for output-voltage monitoring.

Key Features

  • Eliminates External Components and Reduces Total Cost
    • No Schottky—Synchronous Operation for High Efficiency and Reduced Cost
    • Internal Compensation
    • Internal Feedback Divider for Fixed 3.3V, 5V Output Voltages
    • Internal Soft-Start
    • All-Ceramic Capacitors, Ultra-Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 60V Input Voltage Range
    • Fixed 3.3V and 5V Output Voltage Options
    • Adjustable 0.9V to 0.89 x VIN Output Voltage Option
    • Delivers Up to 300mA Load Current
    • Configurable Between PFM and Forced-PWM Modes
  • Reduces Power Dissipation
    • Peak Efficiency = 92%
    • PFM Feature for High Light-Load Efficiency
    • Shutdown Current = 2.2µA (typ)
  • Operates Reliably in Adverse Industrial Environments
    • Hiccup-Mode Current Limit and Autoretry Startup
    • Built-In Output Voltage Monitoring with Open-Drain Active-Low RESET Pin
    • Programmable EN/UVLO Threshold
    • Monotonic Startup into Prebiased Output
    • Overtemperature Protection
    • High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range

Applications/Uses

  • 4–20mA Current Loops
  • General-Purpose Point-of-Load
  • High-Voltage LDO Replacement
  • HVAC and Building Control
  • Industrial Sensors
  • 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) 53
IOUT1 (A) (max) 0.3
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 500
Design Tools EE-Sim
Package/Pins TDFN/8
Budgetary
Price (See Notes)
$1.10 @1k
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Simplified Block Diagram

MAX15062: Typical Operating Circuit MAX15062: Typical Operating Circuit Zoom icon

Design & Development

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

Description

The MAX15062A evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the performance of the MAX15062A 60V, 300mA ultra-small, high-efficiency, synchronous step-down converter. The EV kit operates over a wide 4.5V to 60V input voltage range, and provides up to 300mA at the preset 3.3V output. The device features undervoltage lockout, overcurrent protection, and thermal shutdown. The EV kit switches at a fixed frequency of 500kHz, and delivers a peak efficiency of 90% with the supplied components.
The EV kit comes installed with the MAX15062AATA+ in an 8-pin (2mm x 2mm) lead(Pb)-free/RoHS-compliant TDFN package.

View Details

Features

  • 4.5V to 60V Input Voltage Range (Note 1)
  • 3.3V Output, 300mA Continuous Current
  • Internal Compensation
  • EN/UVLO for On/Off Control and Programmable Input Undervoltage Lockout
  • 90% Peak Efficiency
  • 500kHz Fixed-Frequency PWM Operation
  • PFM or Forced-PWM Mode of Operation
  • Hiccup Mode Overcurrent Protection
  • Open-Drain Active-Low RESET Output
  • Thermal Shutdown
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX15062B evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the performance of the MAX15062B 60V, 300mA ultra-small, high-efficiency, synchronous step-down converter. The EV kit operates over a wide 6.5V to 60V input voltage range, and provides up to 300mA at the preset 5V output. The device features undervoltage lockout, overcurrent protection, and thermal shutdown. The EV kit switches at a fixed frequency of 500kHz, and delivers a peak efficiency of 92% with the supplied components.
The EV kit comes installed with the MAX15062BATA+ in an 8-pin (2mm x 2mm) lead(Pb)-free/RoHS-compliant TDFN package.

View Details

Features

  • 6.5V to 60V Input Voltage Range
  • 5V Output, 300mA Continuous Current
  • Internal Compensation
  • EN/UVLO for On/Off Control and Programmable Input Undervoltage Lockout
  • 92% Peak Efficiency
  • 500kHz Fixed-Frequency PWM Operation
  • PFM or Forced-PWM Mode of Operation
  • Hiccup Mode Overcurrent Protection
  • Open-Drain Active-Low RESET Output
  • Thermal Shutdown
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX15062C-12V evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the performance of the MAX15062C 60V, 300mA ultra-small, high-efficiency, synchronous step-down converter. The EV kit operates over a wide input voltage range of 14V to 60V, and provides up to 300mA load current at 12V output voltage. The device features undervoltage lockout, overcurrent protection, and thermal shutdown. The EV kit switches at a frequency of 500kHz, and delivers a peak efficiency of 95% with the supplied components.

The EV kit comes installed with the MAX15062CATA+ in an 8-pin (2mm x 2mm) lead(Pb)-free/RoHS-compliant TDFN package.

View Details

Features

  • 14V to 60V Input Voltage Range
  • 12V Output, 300mA Continuous Current
  • Internal Compensation
  • EN/UVLO for On/Off Control and Programmable Input Undervoltage Lockout
  • 95% Peak Efficiency
  • 500kHz Switching Frequency
  • PFM or Forced-PWM Mode of Operation
  • Hiccup Mode Overcurrent Protection
  • Open-Drain Active-Low RESET Output
  • Thermal Shutdown
  • Lead-Free, 8-Pin, 2mm x 2mm TDFN Package
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX15062C5EVKITE# evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the performance of the MAX15062C 60V, 300mA ultra-small, high-efficiency, synchronous step-down converter. The EV kit operates over a wide input voltage range of 6.5V to 60V, and provides up to 300mA load current at 5V output voltage. The device features undervoltage lockout, overcurrent protection, and thermal shutdown. The EV kit switches at a frequency of 500kHz, and delivers a peak efficiency of 95% with the supplied components. 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 MAX15062 data sheet.

The EV kit comes installed with the MAX15062CATA+ in an 8-pin (2mm x 2mm) lead(Pb)-free/RoHS-compliant TDFN package.

View Details

Features

  • 6.5V to 60V Input Voltage Range
  • 5V Output, 300mA Continuous Current
  • Internal Compensation
  • EN/UVLO for On/Off Control and Programmable Input Undervoltage Lockout
  • 95% Peak Efficiency
  • 500kHz Switching Frequency
  • PFM or Forced-PWM Mode of Operation
  • Hiccup Mode Overcurrent Protection
  • Open-Drain Active-Low RESET Output
  • Thermal Shutdown
  • Lead-Free, 8-Pin, 2mm x 2mm TDFN Package
  • Proven PCB Layout
  • Fully Assembled and Tested
  • Complies with CISPR22(EN55022) Class B Conducted and Radiated Emissions

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Tools & Models

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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) 53
IOUT1 (A) (max) 0.3
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 500
Design Tools EE-Sim
Package/Pins TDFN/8
Budgetary
Price (See Notes)
$1.10 @1k

Key Features

  • Eliminates External Components and Reduces Total Cost
    • No Schottky—Synchronous Operation for High Efficiency and Reduced Cost
    • Internal Compensation
    • Internal Feedback Divider for Fixed 3.3V, 5V Output Voltages
    • Internal Soft-Start
    • All-Ceramic Capacitors, Ultra-Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 60V Input Voltage Range
    • Fixed 3.3V and 5V Output Voltage Options
    • Adjustable 0.9V to 0.89 x VIN Output Voltage Option
    • Delivers Up to 300mA Load Current
    • Configurable Between PFM and Forced-PWM Modes
  • Reduces Power Dissipation
    • Peak Efficiency = 92%
    • PFM Feature for High Light-Load Efficiency
    • Shutdown Current = 2.2µA (typ)
  • Operates Reliably in Adverse Industrial Environments
    • Hiccup-Mode Current Limit and Autoretry Startup
    • Built-In Output Voltage Monitoring with Open-Drain Active-Low RESET Pin
    • Programmable EN/UVLO Threshold
    • Monotonic Startup into Prebiased Output
    • Overtemperature Protection
    • High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range

Applications/Uses

  • 4–20mA Current Loops
  • General-Purpose Point-of-Load
  • High-Voltage LDO Replacement
  • HVAC and Building Control
  • Industrial Sensors
  • Process Control

Description

The MAX15062 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input voltage range. The converter delivers output current up to 300mA at 3.3V (MAX15062A), 5V (MAX15062B), and adjustable output voltages (MAX15062C). The device operates over the -40°C to +125°C temperature range and is available in a compact 8-pin (2mm × 2mm) TDFN package. Simulation models are available.

The device employs a peak-current-mode control architecture with a MODE pin that can be used to operate the device in pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. PWM operation provides constant frequency operation at all loads and is useful in applications sensitive to variable switching frequency. PFM operation disables negative inductor current and additionally skips pulses at light loads for high efficiency. The low-resistance on-chip MOSFETs ensure high efficiency at full load and simplify the PCB layout.

To reduce input inrush current, the device offers an internal soft-start. The device also incorporates an EN/UVLO pin that allows the user to turn on the part at the desired input-voltage level. An open-drain active-low RESET pin can be used for output-voltage monitoring.

Simplified Block Diagram

MAX15062: Typical Operating Circuit MAX15062: Typical Operating Circuit Zoom icon

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