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4.5V to 36V, 2.7A, High-Efficiency, Synchronous Step-Down DC-DC Converter

Wide Input Voltage, 2.7A Internal FET Synchronous Buck Converter Ideal for Industrial Applications

产品详情

主要特征

应用/用途

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) 2.7
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (typ) 0.05
# DC-DC Outputs 1
Switching Frequency (kHz) 400-2200
Design Tools EE-Sim
Package/Pins TQFN-CU/16
Budgetary
Price (See Notes)
1.18
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参量

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) 2.7
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (typ) 0.05
# DC-DC Outputs 1
Switching Frequency (kHz) 400-2200
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=26769', '')
Package/Pins TQFN-CU/16
Budgetary
Price (See Notes)
1.18

主要特征

  • 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 2.7A 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 95.41%
    • 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 Active-Low RESET
    • Programmable EN/UVLO Threshold
    • Overtemperature Protection
    • CISPR32 Class B Compliant
    • Wide -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range

应用/用途

  • 工业控制电源
  • 通用负载点电源
  • 配电稳压器
  • 基站电源
  • 壁式变压器稳压
  • 高压单板系统

描述

The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power supply solutions. The MAX17644 is a high-efficiency, high-voltage, Himalaya synchronous step-down DC-DC converter with integrated MOSFETs operating over an input-voltage range of 4.5V to 36V. The device can deliver up to 2.7A of current. The MAX17644 is available in three variants: MAX17644A, MAX17644B, and MAX17644C. The MAX17644A and MAX17644B are fixed 3.3V and fixed 5V output parts, respectively. The MAX17644C 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 MAX17644 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 MAX17644 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 MAX17644A/MAX17644B/MAX17644C is ±1.2%.The device is available in a 16-pin (3mm x 3mm) TQFN package. Simulation models are available.

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