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36V, 2A, 2.2MHz Step-Down Converter with Low Operating Current

Direct Car Battery Voltage Conversion to 3.3V Above AM Radioband at 2A

Product Details

Key Features

Applications/Uses

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3.5
VIN (V) (max) 36
VOUT1 (V) (min) 1
VOUT1 (V) (max) 10
IOUT1 (A) (max) 2
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 2200
Package/Pins TQFN/16
TSSOP/16
Budgetary
Price (See Notes)
2.23
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3.5
VIN (V) (max) 36
VOUT1 (V) (min) 1
VOUT1 (V) (max) 10
IOUT1 (A) (max) 2
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 2200
Package/Pins TQFN/16
TSSOP/16
Budgetary
Price (See Notes)
2.23

Key Features

  • Supports Up to 2A Loads without External FET Saves Space and Cost
    • Integrated 2A Internal High-Side (70mΩ typ) Switch
    • Fast Load-Transient Response and Current-Mode Architecture
  • Direct Car Battery to Sub-5V Rail Conversion at Beyond 2MHz Reduces External Component Count
    • 5V Fixed or 1V to 10V Adjustable Output Voltage
    • High Duty Cycle During Undervoltage Transients
  • Robust Input Voltage Up to 36V Supports Automotive Applications
    • Wide 3.5V to 36V Input Voltage Range
    • 42V Input Transients Tolerance
    • Overvoltage, Undervoltage, Overtemperature, and Short-Circuit Protections
  • Meets Tight OEM Power-Consumption Requirements with Low IQ
    • 30µA Standby Mode Operating Current
    • 5µA Typical Shutdown Current
  • Advanced Clock Capabilities Offer Further Reduction in EMI if Necessary to Enable Noise-Free System Design
    • Adjustable Switching Frequency (1MHz to 2.2MHz)
    • Frequency-Synchronization Input
    • Spread Spectrum (Optional)

Applications/Uses

  • Automotive
  • High-Voltage Input DC-DC Converters
  • Industrial
  • Point-of-Load Applications

Description

The MAX16977 is a 2A, current-mode, step-down converter with an integrated high-side switch. The device is designed to operate with input voltages from 3.5V to 36V while using only 30µA quiescent current at no load. The switching frequency is adjustable from 1MHz to 2.2MHz by an external resistor and can be synchronized to an external clock. The output voltage is pin selectable to be 5V fixed or adjustable from 1V to 10V. The wide input voltage range along with its ability to operate at high duty cycle during undervoltage transients make the device ideal for automotive and industrial applications.

The device operates in skip mode for reduced current consumption in light-load applications. Protection features include overcurrent limit, overvoltage, and thermal shutdown with automatic recovery. The device also features a power-good monitor to ease power-supply sequencing.

The device operates over the -40°C to +125°C automotive temperature range, and is available in 16-pin TSSOP and TQFN (5mm x 5mm) packages with exposed pads.

Simplified Block Diagram

MAX16977: Typical Operating Circuit MAX16977: 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 .