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36V, 3A Mini Buck Converter with 3.5uA IQ

クラス最高の超低IQミニバック、車載アプリケーションに最適

製品の詳細

The MAX25232 is a small, synchronous buck converter with integrated high-side and low-side switches. The device is designed to deliver up to 3A with 3.5V to 36V input voltages while using only 3.5µA quiescent current at no load.

The device provides an accurate output voltage of ±2% in FPWM mode within the normal 6V to 18V operation input range. With 65ns minimum on-time capability, the converter is capable of large input-to-output conversion ratios. Voltage quality can be monitored by observing the PGOOD signal. The device can operate in dropout by running at 99% duty cycle, making it ideal for automotive and industrial applications. The device offers two fixed 5V and 3.3V output voltages. In addition, the device can be configured for 1V to 10V output voltages using an external resistor-divider. Frequency is internally fixed at 2.1MHz, which allows for small external components and reduced output ripple, and guarantees no AM interference. A 400kHz option is also offered to provide minimum switching losses and maximum efficiency. The device automatically enters skip mode at light loads with ultra-low 3.5µA quiescent current at no load. The device offers pin-enabled spread-spectrum frequency modulation designed to minimize EMI-radiated emissions due to the modulation frequency.

The MAX25232 variants are available in a small (3mm x 3mm), 12-pin, side-wettable TDFN package with an exposed pad, and require very few external components.

主な機能

  • Synchronous DC-DC Converter with Integrated FETs
    • MAX25232ATCA/VY+/B = 2.5A IOUT
    • MAX25232ATCD/VY+/E = 3A IOUT
    • 3.5µA Quiescent Current when in Standby Mode
  • Small Solution Size Saves Space
    • 65ns Minimum On-Time
    • 2.1MHz or 400kHz Operating Frequency
    • Fixed Output Voltages with ±2% Output Accuracy in FPWM Mode (5V/3.3V)
    • Fixed 3.5ms Internal Soft-Start
    • Innovative Current-Mode-Control Architecture Minimizes Total Board Space and BOM Count
  • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing
  • Protection Features and Operating Range Ideal for Automotive Applications
    • 3.5V to 36V Operating VIN Range
    • 40V Load-Dump Protection
    • 99% Duty-Cycle Operation with Low Dropout
    • -40°C to +125°C Automotive Temperature Range
    • AEC-Q100 Qualified

アプリケーション/用途

  • 車載用
  • 高電圧DC-DCコンバータ
  • 産業用
Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3.5
VIN (V) (max) 40
VOUT1 (V) (min) 3
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 3
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
Design Tools EE-Sim
Package/Pins TDFN-CU/12
Budgetary
Price (See Notes)
$1.30 @1k
全て表示する

簡略化されたブロック図

MAX25232:標準アプリケーション回路 MAX25232:標準アプリケーション回路 Zoom icon

技術資料

データシート 36V, 3A Mini Buck Converter with 3.5uA IQ Jan 05, 2021

設計と開発

以下タイトルをクリックして詳細をご覧ください。

説明

The MAX25232 evaluation kit (EV kit) provides a proven design to evaluate the MAX25232 2.1MHz/400kHz high-voltage mini-buck converter in a 12-pin side-wettable TDFN package. All components are rated for the automotive temperature range. Various test points and jumpers are included for evaluation.

The standard EV kit comes with the MAX25232ATCA/V+ installed (5V, 2.1MHz), but it can also be used to evaluate other MAX25232 variants with minimal component changes (e.g., IC replacement of U1).

詳細を見る

特長

  • 3.5V to 36V Input Supply Range
  • 5V or 3.3V Fixed Output Voltage, or Adjustable Between 1V and 10V
  • Delivers Up to 2.5A Output Current
  • Frequency-Synchronization Input
  • Enable Input
  • Voltage-Monitoring PGOOD Output
  • Proven PCB Layout
  • Fully Assembled and Tested

/jp/design/design-tools/ee-sim.html?

ツールおよびモデル

EE-Sim: 設計およびシミュレーションMAX25232

デザインを作成する

サポートとトレーニング

ナレッジベースを検索して技術質問への回答を探す。

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 をご覧ください。

パラメーター

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3.5
VIN (V) (max) 40
VOUT1 (V) (min) 3
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 3
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
Design Tools EE-Sim
Package/Pins TDFN-CU/12
Budgetary
Price (See Notes)
$1.30 @1k

主な機能

  • Synchronous DC-DC Converter with Integrated FETs
    • MAX25232ATCA/VY+/B = 2.5A IOUT
    • MAX25232ATCD/VY+/E = 3A IOUT
    • 3.5µA Quiescent Current when in Standby Mode
  • Small Solution Size Saves Space
    • 65ns Minimum On-Time
    • 2.1MHz or 400kHz Operating Frequency
    • Fixed Output Voltages with ±2% Output Accuracy in FPWM Mode (5V/3.3V)
    • Fixed 3.5ms Internal Soft-Start
    • Innovative Current-Mode-Control Architecture Minimizes Total Board Space and BOM Count
  • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing
  • Protection Features and Operating Range Ideal for Automotive Applications
    • 3.5V to 36V Operating VIN Range
    • 40V Load-Dump Protection
    • 99% Duty-Cycle Operation with Low Dropout
    • -40°C to +125°C Automotive Temperature Range
    • AEC-Q100 Qualified

アプリケーション/用途

  • 車載用
  • 高電圧DC-DCコンバータ
  • 産業用

説明

The MAX25232 is a small, synchronous buck converter with integrated high-side and low-side switches. The device is designed to deliver up to 3A with 3.5V to 36V input voltages while using only 3.5µA quiescent current at no load.

The device provides an accurate output voltage of ±2% in FPWM mode within the normal 6V to 18V operation input range. With 65ns minimum on-time capability, the converter is capable of large input-to-output conversion ratios. Voltage quality can be monitored by observing the PGOOD signal. The device can operate in dropout by running at 99% duty cycle, making it ideal for automotive and industrial applications. The device offers two fixed 5V and 3.3V output voltages. In addition, the device can be configured for 1V to 10V output voltages using an external resistor-divider. Frequency is internally fixed at 2.1MHz, which allows for small external components and reduced output ripple, and guarantees no AM interference. A 400kHz option is also offered to provide minimum switching losses and maximum efficiency. The device automatically enters skip mode at light loads with ultra-low 3.5µA quiescent current at no load. The device offers pin-enabled spread-spectrum frequency modulation designed to minimize EMI-radiated emissions due to the modulation frequency.

The MAX25232 variants are available in a small (3mm x 3mm), 12-pin, side-wettable TDFN package with an exposed pad, and require very few external components.

簡略化されたブロック図

MAX25232:標準アプリケーション回路 MAX25232:標準アプリケーション回路 Zoom icon

技術資料

データシート 36V, 3A Mini Buck Converter with 3.5uA IQ Jan 05, 2021

サポートとトレーニング

ナレッジベースを検索して技術質問への回答を探す。

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 をご覧ください。