Analog Devices / Maxim Integrated MAX17532 直流-直流转换器
美信 MAX17532 直流-直流转换器是高效高压同步降压型转换器。MAX17532 带集成 MOSFET，采用 4V 到 42V 的工作输入电压。MAX17532 可提供高达 100mA 的电流，输出电压为 0.8V 至 0.9xV<sub>IN</sub>。在 -40°C 至 +125°C 温度范围内，反馈电压精度为& plusm;1.75%。MAX17532 采用峰值电流控制模式，可在脉宽调制（PWM）或脉冲频率调制(PFM)模式下工作。
特性
- Reduces external components and total cost
- No Schottky-synchronous
- Internal compensation for any output voltage
- Built-in soft-start
- All-ceramic capacitors, compact layout
- Reduces number of DC-DC regulators to stock
- Wide 4V to 42V input
- Adjustable 0.8V to 0.9V VIN output
- 100kHz to 2.2MHz adjustable switching frequency with external synchronization
- Reduces power dissipation
- 22µA quiescent current
- Peak efficiency > 90%
- PFM enables enhanced light-load efficiency
- 1.2µA shutdown current
- Operates reliably in adverse environments
- Peak current limit protection
- Built-in output voltage monitoring active-low RESET
- Programmable EN/UVLO threshold
- Monotonic startup into pre-biased load
- Overtemperature protection
- -40°C to +125°C operation
Block Diagram
Evaluation Kit
Analog Devices Inc. MAX17532AUBEVKIT 5V Evaluation Kit is a fully assembled and tested circuit board that demonstrates the performance of the MAX17532. The MAX17532 is a 42V, 100mA ultra-small, high-efficiency, synchronous step-down DC-DC converter in a 10-pin µMAX package. The evaluation kit operates over a wide input voltage range of 6V to 42V and provides up to 100mA load current at 5V output. It draws only 26µA supply current under no-load conditions (EN/UVLO connected to VIN). The evaluation kit is programmed to switch at a frequency of 220kHz. The device is simple to use and easily configurable with minimal external components. It features cycle-by-cycle peak current-limit protection, undervoltage lockout, and thermal shutdown.
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