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MAX17640
電源集積回路 スイッチングレギュレータ MAX17640
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MAX17640

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60V, 400mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converters

業界最小の高電圧同期整流バックレギュレータ

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製品の詳細

パラメトリック仕様を見る： Step-Down Switching Regulators

主な特長

パラメトリック仕様を見る： Step-Down Switching Regulators
Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 60
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 53
IOUT1 (A) (max) 0.4
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (typ) 2.5
# DC-DC Outputs 1
Switching Frequency (kHz) 500
Design Tools EE-Sim
Package/Pins TDFN/8
Budgetary
Price (See Notes) 		0.85
パラメトリック仕様を見る： Step-Down Switching Regulators
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Technical Docs

データシート 60V, 400mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converters May 24, 2021

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パラメーター

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 60
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 53
IOUT1 (A) (max) 0.4
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (typ) 2.5
# DC-DC Outputs 1
Switching Frequency (kHz) 500
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=25944', '')
Package/Pins TDFN/8
Budgetary
Price (See Notes) 		0.85
See parametric specs for Step-Down Switching Regulators

主な特長

  • Eliminates External Components and Reduces Total Cost
    • No Schottky—Synchronous Operation for High Efficiency and Reduced Cost
    • Internal Compensation
    • Internal Feedback Divider for Fixed 3.3V, 5V Output Voltages
    • Internal Soft-Start
    • All Ceramic Capacitors, Ultra-Compact Layout
  • Flexibility to Support Multiple Rails in a System
    • Wide 4.5V to 60V Input Voltage Range
    • Fixed 3.3V and 5V Output Voltage Options
    • Adjustable 0.9V to 0.89 x VIN Output Voltage Option
    • Delivers up to 400mA Load Current
    • Configurable Between PFM and Forced-PWM Modes
  • Reduces Power Dissipation
    • 92% Peak Efficiency
    • PFM Feature for High Light-Load Efficiency
    • 2.2µA (typ) Shutdown Current
  • ​Operates Reliably in Adverse Industrial Environments
    • Hiccup-Mode Current Limit and Auto-retry Startup
    • Built-In Output Voltage Monitoring with Open-Drain Active-Low RESET Pin 
    • Programmable EN/UVLO Threshold
    • Monotonic Startup into Prebiased Output
    • Overtemperature Protection
    • Wide -40°C to +125°C Ambient Operating Temperature Range and -40°C to +150°C Junction Temperature Range
    • Complies with CISPR32 (EN55032) Class B Conducted and Radiated Emissions

アプリケーション/用途

  • 産業用センサー
  • 4～20mA電流ループ
  • HVACおよびビル制御
  • 高電圧LDOの代替
  • 汎用PoL (Point-of-Load)

説明

The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power-supply solutions. The MAX17640 family of products are high-efficiency, high-voltage, Himalaya synchronous DC-DC converters with integrated MOSFETs operating over a wide input-voltage range of 4.5V to 60V.

The converters can deliver up to 400mA and generate output voltages from 0.9V to 0.89 x VIN; MAX17640A fixed at 3.3V, MAX17640B fixed at 5.0V, and MAX17640C is adjustable. The family of converters is available in a compact, 8-pin, 2mm x 2mm TDFN package. Simulation models are available to evaluate the performance using the online EE-Sim® tool from Maxim.

The device employs a peak-current-mode control architecture with a MODE pin that can be used to operate the device in pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. PWM operation provides constant frequency operation at all loads and is useful in applications sensitive to variable switching frequency. PFM operation disables negative inductor current and additionally skips pulses at light loads for high-efficiency. The low-resistance on-chip MOSFETs ensure high-efficiency at full load and simplify the PCB layout.

To reduce input inrush current, the device offers an internal soft-start. The device also incorporates an EN/UVLO pin that allows the user to turn on the part at the desired input voltage level. An open-drain active-low RESET pin can be used for output-voltage monitoring.

簡易ブロック図

MAX17640：標準アプリケーション回路 MAX17640：標準アプリケーション回路 Zoom icon

Technical Docs

データシート 60V, 400mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converters May 24, 2021

サポートとトレーニング

技術質問への回答についてはナレッジベースで検索ください。

絞り込まれた検索

マキシムでは、お客様の技術的質問にお答えするため、アプリケーションエンジニアの専任チームも配置しています。 サポートセンター をご利用ください。