Analog Devices / Maxim Integrated MAX15462 同步降压型直流-直流转换器
Maxim MAX15462 同步降压型直流-直流转换器采用峰值电流模式控制构架，具有 MODE 引脚。 该引脚可用于在脉冲宽度调制 (PWM) 或脉冲频率调制等控制模式下操作器件。 在操作上，PWM 可提供各种负载下的恒定频率工作，适用于对开关频率敏感的应用。 在操作上，PFM 可禁用负感应电流，并在轻负载下跳脉冲，实现高效率。 低电阻片上 MOSFET 确保满载时的高效，同时简化了电路板布局。 为减小输入侵入电流，该器件提供内部软启动功能。 该器件还融入了 EN/UVLO 引脚，允许用户在输入电压达到相应要求时开启器件。 开漏极有源低电平 RESET 引脚可用于输出电压监控。
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.
The Analog Devices MAX15462 DC-DC Converter operates over the -40°C to +125°C temperature range and is available in a compact 8-pin (2mm x 2mm) TDFN package.
特性
- 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
- Reduces the number of DC-DC regulators to stock
- Wide 4.5V to 42V input voltage range
- Fixed 3.3V and 5V output voltage options
- Adjustable 0.9V to 0.89V x VIN output voltage option
- Delivers up to 300mA load current
- Configurable between PFM and forced-PWM modes
- Reduces power dissipation
- 92% peak efficiency
- PFM feature for high light-load efficiency
- 2.2μA typical 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 a pre-biased output
- Overtemperature protection
- -40°C to +125°C automotive/industrial temperature range
- 2mm x 2mm TDFN-8 package
应用
- 4mA to 20mA current loops
- General-purpose point of load
- High-voltage LDO replacement
- HVAC and building control
- Industrial sensors
- Process control
Block Diagram
发布日期: 2016-08-31
| 更新日期: 2023-04-12