Renesas Electronics ISL85005/5A同步降压稳压器

Renesas/Intersil ISL85005/5A同步降压稳压器是单片稳压器，集成了5A、4.5V至18V高侧和低侧FET。这些器件具有宽输入电压范围，以支持具有来自多节电池的输入电压的应用。ISL85005和ISL85005A通过电流模式控制调节输出电压，并具有内部振荡器。ISL85005配置为强制连续导通模式 (CCM) 或二极管仿真模式，ISL85005A始终以强制CCM方式运行。应用包括网络和通信设备、多功能打印机、负载点稳压器和嵌入式计算系统。

The ISL85005 has a fixed 2.3ms soft-start, while the ISL85005A features a programmable soft-start to limit inrush current during startup. With the SS pin floating, the soft-start time of ISL85005A is also 2.3ms.

The ISL85005 can be configured in either forced Continuous Conduction Mode (CCM) or Diode Emulation Mode (DEM). DEM enables high efficiency in light-load conditions. The ISL85005A always operates in forced CCM.

The ISL85005 and ISL85005A have built-in protections including input UVLO protection, input and output overvoltage protection, high-side cycle-by-cycle current limit, low-side forward current limit, reverse current limit, and thermal shutdown.

The Renesas Electronics ISL85005 & ISL85005A Synchronous Buck Regulators are housed in a compact 3mm x 4mm Dual Flat No-Lead (DFN) package with an exposed pad for enhanced thermal performance.

特性

5V to 18V input voltage range
Internal 5A, 18V high-side, and low-side MOSFET switches
±1%, 8V feedback voltage reference
Integrated bootstrap diode with undervoltage detection
Current mode control with internal slope compensation
Internal or external compensation options
Default internally set 500kHz switching frequency
Synchronization capability to an external clock (ISL85005)

Diode Emulation Mode (DEM) and Forced CCM (FCCM) options (ISL85005)
Adjustable soft-start time (ISL85005A)
Output Power-Good (PG) indicator
Input Undervoltage Lockout (UVLO), input and output overvoltage protection
High-side cycle-by-cycle current limit, low-side forward and reverse overcurrent protection, and thermal shutdown
-40°C to +125°C junction temperature range
3mm x 4mm DFN-12 package with an exposed pad