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4.5V–60V, 2A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation

60V Synchronous Buck Converter with Internal FETs Enables High Efficiency and Low Temperature Rise

产品详情

主要特征

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 60
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 54
IOUT1 (A) (max) 2
Switch Type Internal
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (typ) 5.65
# DC-DC Outputs 1
Switching Frequency (kHz) 400
Design Tools EE-Sim
Package/Pins TDFN-CU/12
Budgetary
Price (See Notes)
1.57
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参量

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 60
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 54
IOUT1 (A) (max) 2
Switch Type Internal
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (typ) 5.65
# DC-DC Outputs 1
Switching Frequency (kHz) 400
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=29518', '')
Package/Pins TDFN-CU/12
Budgetary
Price (See Notes)
1.57

主要特征

  • Reduces External Components and Total Cost
    • No Schottky-Synchronous Operation
    • Internal Compensation for Any Output Voltage
    • All-Ceramic Capacitors, Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 60V Input
    • Adjustable 0.9V to (0.9 × VIN) Output
    • Up to 2A Peak-Load Current
    • 400kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
  • Reduces Power Dissipation
    • Peak Efficiency of 91.6%
    • Auxiliary Bootstrap LDO for Improved Efficiency
    • 4.65μA Shutdown Current
  • Operates Reliably in Adverse Industrial Environments
    • Hiccup-Mode Overload Protection
    • Adjustable Soft-Start
    • Built-In Output-Voltage Monitoring with Active-Low RESET
    • Programmable EN/UVLO Threshold
    • Monotonic Startup into Prebiased Load
    • Overtemperature Protection
    • Wide Industrial -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range
    • Complies with CISPR22 (EN55022) Class B Conducted and Radiated Emissions

应用/用途

  • Industrial-Control Power Supplies
  • General-Purpose Point-of-Load
  • Distributed Supply Regulation
  • Base-Station Power Supplies
  • Wall Transformer Regulation
  • High-Voltage, Single-Board Systems
  • Pulsed-Load Applications
  • Communication Modules

描述

The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power-supply solutions. The MAX17643 high-efficiency, high-voltage, Himalaya synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input. The converter can deliver up to 2A and generates output voltages from 0.9V up to (0.9 x VIN)V. The feedback (FB) voltage is accurate to within ±.4% over -40°C to +125°C. Built-in compensation across the output- voltage range eliminates the need for external components. The MAX17643 features peak-current-mode control architecture and operates in fixed frequency forced PWM mode. The current-limit settings of the MAX17643 allow the device to supply load-current peaks up to 2A. This allows the device to support pulsed load applications such as communication modules with minimal output-voltage droop. The MAX17643 offers a low minimum on-time that allows high switching frequencies and a smaller solution size.

The device is available in a 12-pin (3mm × 3mm) TDFN package. Simulation models are available.

简化框图

MAX17643: Typical Application Circuit MAX17643: Typical Application Circuit Zoom icon

Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心