Renesas Electronics ISL85005/5A同期バックレギュレータ

Renesas / Intersil ISL85005/5A同期バックレギュレータは、内蔵型5A、4.5V〜18Vハイサイド、ローサイドFETが備わったモノリシックレギュレータです。これらのデバイスには、広い入力電圧範囲があり、マルチセルバッテリからの入力電圧が備わったアプリケーションをサポートしています。ISL85005およびISL85005Aは、電流モード制御を使用して出力電圧の安定化を図り、また内部発振器をもっています。ISL85005は強制連続導通モード（CCM）ダイオードエミュレーションモードのいずれかで構成されており、ISL85005Aは常に強制CCMで動作します。アプリケーションには、ネットワークと通信機器、多機能プリンタ、POLレギュレータおよび組み込みコンピュータシステムがあります。

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.

特徴

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