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4.5V to 36V, 2A, High-Efficiency, Synchronous Step-Down DC-DC Converter

Wide Input Voltage, 2A Internal FET Synchronous Buck Converter Ideal for Industrial Applications

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 36
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 32.4
IOUT1 (A) (max) 2
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) 400
2200
Design Tools EE-Sim
Package/Pins TQFN-CU/16
Budgetary
Price (See Notes)
1.13
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 36
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 32.4
IOUT1 (A) (max) 2
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) 400
2200
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=9265', '')
Package/Pins TQFN-CU/16
Budgetary
Price (See Notes)
1.13

Key Features

  • Reduces External Components and Total Cost
    • No Schottky - Synchronous Operation
    • Internal Compensation Components
    • All-Ceramic Capacitors, Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 36V Input
    • Adjustable Output Voltage Range from 0.9V up to 90% of VIN
    • Delivers up to 2A Over the Temperature Range
    • 400kHz to 2.2MHz Adjustable Frequency with External Clock Synchronization
    • Available in a 16-Pin, 3mm x 3mm TQFN Package
  • Reduces Power Dissipation
    • Peak Efficiency of 94%
    • PFM and DCM Modes Enable Enhanced Light-Load Efficiency
    • Auxiliary Bootstrap Supply (EXTVCC) for Improved Efficiency
    • 2.8μA Shutdown Current
  • Operates Reliably in Adverse Industrial Environments
    • Hiccup-Mode Overload Protection
    • Adjustable and Monotonic Startup with Prebiased Output Voltage
    • Built-in Output-Voltage Monitoring with RESET
    • Programmable EN/UVLO Threshold
    • 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 MAX17632 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operating over an input-voltage range of 4.5V to 36V. It can deliver up to 2A current. The MAX17632 is available in three variants, MAX17632A, MAX17632B, and MAX17632C. The MAX17632A and MAX17632B are fixed 3.3V and fixed 5V output parts, respectively. The MAX17632C is an adjustable output voltage (from 0.9V up to 90% of VIN) part. Built-in compensation across the output-voltage range eliminates the need for external compensation components.

The MAX17632 features peak-current-mode control architecture. The device can be operated in the forced pulse-width modulation (PWM), or pulse-frequency modulation (PFM), or discontinuous-conduction mode (DCM) to enable high efficiency under full-load and light-load conditions. The MAX17632 offers a low minimum on-time that allows high switching frequencies and a smaller solution size.

The feedback-voltage regulation accuracy over -40°C to +125°C for the MAX17632A/MAX17632B/MAX17632C is ±1.2%.The device is available in a 16-pin (3mm x 3mm) TQFN package. Simulation models are available.

Simplified Block Diagram

MAX17632: Block Diagram MAX17632: Block Diagram 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 .