مشخصات
ولتاژ ورودی: 3.5V تا 28V
جریان خروجی: حداکثر 3A
ولتاژ خروجی قابل تنظیم: 0.8V تا 25V
فرکانس سوییچینگ: 570kHz (ثابت)
بازدهی (Efficiency): تا 96٪ (بسته به ولتاژ و جریان)
جریان آماده‌به‌کار: حدود 1μA در حالت خاموش
راه‌اندازی نرم قابل تنظیم با خازن خارجی
مد کاری: PWM در بارهای سنگین، PFM در بارهای سبک
حفاظت در برابر اضافه‌جریان با محدودیت چرخه‌به‌چرخه
حفاظت حرارتی با قطع خروجی
حداقل زمان روشن بودن: 135ns (typical)
پکیج: SOIC-8 (دارای پایه حرارتی PowerPAD)
دمای کاری: -40°C تا 150°C
Introduction
The TPS54331 device is a 28-V, 3-A nonsynchronous buck converter that integrates a low RDS(on) high-side MOSFET. To increase efficiency at light loads, a pulse skipping Eco-mode feature is automatically activated. Furthermore, the 1-μA shutdown supply-current allows the device to be used in battery-powered applications. Current mode control with internal slope compensation simplifies the external compensation calculations and reduces component count while allowing the use of ceramic output capacitors. A resistor divider programs the hysteresis of the input undervoltage lockout. An overvoltage transient protection circuit limits voltage overshoots during startup and transient conditions. A cycle-by-cycle current-limit scheme, frequency foldback and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54331 device is available in an 8-pin SOIC package and 8-pin SO PowerPAD package that have been internally optimized to improve thermal performance.
Features
3.5 to 28-V Input Voltage Range
Adjustable Output Voltage Down to 0.8 V
Integrated 80-mΩ High-Side MOSFET Supports up to 3-A Continuous Output Current
High Efficiency at Light Loads With a Pulse Skipping Eco-mode
Fixed 570 kHz Switching Frequency
Typical 1-μA Shutdown Quiescent Current
Adjustable Slow-Start Limits Inrush Currents
Programmable UVLO Threshold
Overvoltage Transient Protection
Cycle-by-Cycle Current Limit, Frequency Fold Back, and Thermal Shutdown Protection
Applications
Consumer Applications such as Set-Top Boxes, CPE Equipment, LCD Displays, Peripherals, and Battery Chargers
Industrial and Car-Audio Power Supplies
5-V, 12-V, and 24-V Distributed Power Systems
-
دیتاشیت برای کالا وجود ندارد
ویدیوی برای این کالا وجود ندارد
