Maxim Power 美信 MAX17504 高效高压同步降压型转换器
美信MAX17504 高效高压同步降压型转换器带有采用 4.5V 到 60V 输入电压工作的双集成 MOSFET。可提供高达 3.5A 和 0.9V 到 90% VIN 输出电压。在输出电压范围内的内建补偿,免去了使用外部元件的必要。在 -40°C 到 +125°C 范围内,反馈调节度达 ±1.1%。该器件具有峰值-电流-模式控制架构,带有 MODE 特性,可用于在脉冲宽度调制、脉冲频率调制、或非连续导通模式等控制模式下操作器件。PWM 操作模式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。DCM 可在比 PFM 模式更轻的负载条件下进行恒定频率工作,靠的是不跳脉冲,仅是禁用轻负载下的负感应电流。DCM 的工作效率处于 PWM 和 PFM 模式之间。
See MAX17504 3.3V Output Evaluation Kit
See MAX17504 5V Output Evaluation KitFEATURES· Eliminates to Reduce Cost
o No Schottky-Synchronous Operation for High Efficiency
o Internal compensation for Stable Operation at Any Output Voltage
· Reduce Number of DC-DC Regulators to Stock
o Wide 4.5V to 60V Input Voltage Range
o 0.9V to 90% VIN Output Voltage
o Delivers Up to 3.5A Over Temperature
o 200kHz to 2.2MHz Adjustable Frequency with External Synchronization
o Available in a 20-Pin, 5mm x 5mm TQFN Package
· Reduce Power Dissipation
o Peak Efficiency > 90%
o PFM and DCM Modes for High Light-Load Efficiency
o Shutdown Current = 2.8μA (typ)
· Operate Reliably
o Hiccup-Mode Current Limit and Autoretry Startup
o Built-In Output Voltage Monitoring—(Open-Drain Active-Low RESET Pin)
o Resistor Programmable EN/UVLO Threshold
o Adjustable Soft-Start and Pre-Biased Power-Up
o -40°C to +125°C Operation应用· Base Station Power Supplies
· Distributed Supply Regulation
· General-Purpose Point-of-Load
· High-Voltage Single-Board Systems
· Industrial Power Supplies
· Wall Transformer Regulation
BLOCK DIAGRAM