Top

Single 2A/3A 2.2MHz Low-Voltage Step-Down DC-DC Converters

Small and Efficient Synchronous Buck Converter with Low IQ for Point-of-Load Applications

Product Details

The MAX20073/MAX20074 high-efficiency switching regulator family delivers up to 3A load current from 0.5V to 3.8V. The devices operate from an input voltage range of 2.7V to 5.5V, making them ideal for on-board point-of-load and post-regulation applications. Total output error is less than ±1.5% over load, line, and temperature.

The devices feature fixed-frequency PWM mode of operation, with a 2.2MHz switching frequency. High-frequency operation enables an all-ceramic capacitor design and small external components.

The low-resistance on-chip switches ensure high efficiency at heavy loads while minimizing critical inductances, making the layout a much simpler task with respect to discrete solutions. Following a simple layout and footprint ensures first-pass success in new designs.

The devices provide an enable input, spread-spectrum enable input, and active-low RESET output. The output voltage can be preset at the factory to allow customers to achieve ±1.5% output-voltage accuracy without using expensive 0.1% external resistors. In addition, the output voltage can be set to any customer value by using two external resistors at the feedback with 0.5V internal reference. The device offers a fixed 0.85ms soft-start time.

The 10-pin TDFN exposed pad devices include overtemperature shutdown and overcurrent limiting. All devices are designed to operate over the -40°C to +125°C ambient temperature range.

Design Solution: Why Automotive ECUs Need a High-Performance POL Converter ›

Key Features

  • High-Feature Set in Ultra-Small Footprint
    • High-Efficiency DC-DC Converter
    • Up to 3A Output Current
    • 2.7V to 5.5V Operating Supply Voltage
    • Resistor-Adjustable or Factory-Preset Output Voltage
    • Synchronizable, 2.2MHz Switching-Frequency Enable Input
    • Active-Low RESET Output
    • Spread-Spectrum Enable Input
    • Forced-PWM and Skip Modes
    • Current-Mode Architecture
    • 3mm × 3mm × 0.85mm 10-Pin TDFN
  • High Precision
    • 107% Overvoltage Monitor
    • 93% Undervoltage Monitor
    • ±1.5% Output-Voltage Accuracy
    • Excellent Load Transient Performance
    • Overtemperature and Short-Circuit Protection
    • -40°C to +125°C Operating Temperature Range

Applications/Uses

  • Automotive
  • Point-of-Load
Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.5
VOUT1 (V) (max) 3.8
IOUT1 (A) (max) 2
Switch Type Internal
Preset VOUT (V) 3.3
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 2200
Design Tools EE-Sim
Package/Pins TDFN-CU/10
Budgetary
Price (See Notes)
$1.20 @1k
View More

Simplified Block Diagram

MAX20073, MAX20074: Typical Operating Circuit MAX20073, MAX20074: Typical Operating Circuit Zoom icon

Technical Docs

Design & Development

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

Description

The MAX20073 evaluation kit demonstrates the performance and behavior of the MAX20073, a part in the MAX20015–MAX20018/MAX20073/MAX20074 family of pin-compatible, low-voltage, step-down switching regulator ICs.

The regulator delivers current up to 2A at an output voltage between 0.5V and 3.8V. The device operates from a 2.7V to 5.5V input supply voltage, making it ideal for post-regulation and point-of-load applications. The total error over load, line, and temperature ranges is 1.5%. The base switching frequency is 2.2MHz, which allows for all-ceramic capacitor application designs. The regulator can either be synchronized to an external clock or placed in a power-saving skip mode for increased efficiency at light loads.

The regulator provides an enable input and fault flag output. The output voltage can be set using an external resistor-divider and an internal 0.5V reference. Alternatively, it can be programmed at the factory for a specific output voltage, achieving 1.5% output accuracy without resorting to expensive 0.1% resistors. The soft-start time and fault hold time can also be factory programmed.

The regulators include overtemperature shutdown and overcurrent limiting. They are designed to continuously operate over the -40°C to +125°C ambient temperature.

View Details

Features

  • 2.7V to 5.5V Input Voltage Range
  • 0.5V to 3.8V Output Voltage Range
    • Set by External Resistive Divider or Preprogrammed at Factory
    • Base EV Kit Configuration Set to 1.8V/2A Output
  • High-Frequency Switching (2.2MHz) Allows for an All-Ceramic Capacitor Design
  • Continuously Produces Output Current Up to 2A
  • Compact Solution Size
    • Externally Adjustable Output Implementation Fits Inside 65mm2 Area
    • Preprogrammed Output Implementation Fits Inside 55mm2 Area

Description

The MAX20074 evaluation kit demonstrates the performance and behavior of the MAX20074, a part in the MAX20015–MAX20018/MAX20073/MAX20074 family of pin-compatible, low-voltage, step-down switching regulator ICs.

The regulator delivers current up to 3A at an output voltage between 0.5V and 3.8V. The device operates from a 2.7V to 5.5V input supply voltage, making it ideal for post-regulation and point-of-load applications. The total error over load, line, and temperature ranges is 1.5%. The base switching frequency is 2.2MHz, which allows for all-ceramic capacitor application designs. The regulator can either be synchronized to an external clock or placed in a power-saving skip mode for increased efficiency at light loads.

The regulator provides an enable input and fault flag output. The output voltage can be set using an external resistor-divider and an internal 0.5V reference. Alternatively, it can be programmed at the factory for a specific output voltage, achieving 1.5% output accuracy without resorting to expensive 0.1% resistors. The soft-start time and fault hold time can also be factory programmed.

The regulators include overtemperature shutdown and overcurrent limiting. They are designed to continuously operate over the -40°C to 125°C ambient temperature. range

View Details

Features

  • 2.7V to 5.5V Input Voltage Range
  • 0.5V to 3.8V Output Voltage Range
    • Set by External Resistive Divider or Preprogrammed at Factory
    • Base EV Kit Configuration Set to 1.8V/3A Output
  • High-Frequency Switching (2.2MHz) Allows for an All-Ceramic Capacitor Design
  • Continuously Produces Output Current Up to 3A
  • Compact Solution Size
    • Externally Adjustable Output Implementation Fits Inside 65mm2 Area
    • Preprogrammed Output Implementation Fits Inside 55mm2 Area

/en/design/design-tools/ee-sim.html?

Tools & Models

EE-Sim: Design & Simulate MAX20073

Create Design

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

Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.5
VOUT1 (V) (max) 3.8
IOUT1 (A) (max) 2
Switch Type Internal
Preset VOUT (V) 3.3
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 2200
Design Tools EE-Sim
Package/Pins TDFN-CU/10
Budgetary
Price (See Notes)
$1.20 @1k

Key Features

  • High-Feature Set in Ultra-Small Footprint
    • High-Efficiency DC-DC Converter
    • Up to 3A Output Current
    • 2.7V to 5.5V Operating Supply Voltage
    • Resistor-Adjustable or Factory-Preset Output Voltage
    • Synchronizable, 2.2MHz Switching-Frequency Enable Input
    • Active-Low RESET Output
    • Spread-Spectrum Enable Input
    • Forced-PWM and Skip Modes
    • Current-Mode Architecture
    • 3mm × 3mm × 0.85mm 10-Pin TDFN
  • High Precision
    • 107% Overvoltage Monitor
    • 93% Undervoltage Monitor
    • ±1.5% Output-Voltage Accuracy
    • Excellent Load Transient Performance
    • Overtemperature and Short-Circuit Protection
    • -40°C to +125°C Operating Temperature Range

Applications/Uses

  • Automotive
  • Point-of-Load

Description

The MAX20073/MAX20074 high-efficiency switching regulator family delivers up to 3A load current from 0.5V to 3.8V. The devices operate from an input voltage range of 2.7V to 5.5V, making them ideal for on-board point-of-load and post-regulation applications. Total output error is less than ±1.5% over load, line, and temperature.

The devices feature fixed-frequency PWM mode of operation, with a 2.2MHz switching frequency. High-frequency operation enables an all-ceramic capacitor design and small external components.

The low-resistance on-chip switches ensure high efficiency at heavy loads while minimizing critical inductances, making the layout a much simpler task with respect to discrete solutions. Following a simple layout and footprint ensures first-pass success in new designs.

The devices provide an enable input, spread-spectrum enable input, and active-low RESET output. The output voltage can be preset at the factory to allow customers to achieve ±1.5% output-voltage accuracy without using expensive 0.1% external resistors. In addition, the output voltage can be set to any customer value by using two external resistors at the feedback with 0.5V internal reference. The device offers a fixed 0.85ms soft-start time.

The 10-pin TDFN exposed pad devices include overtemperature shutdown and overcurrent limiting. All devices are designed to operate over the -40°C to +125°C ambient temperature range.

Design Solution: Why Automotive ECUs Need a High-Performance POL Converter ›

Simplified Block Diagram

MAX20073, MAX20074: Typical Operating Circuit MAX20073, MAX20074: 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