EVB_RT7247AHGSP: 3.3V @ 2A, 4.5 ~ 18Vin

Summary

The RT7247A is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 2A output current from a 4.5V to 18V input supply. The RT7247A's current mode architecture and external compensation allow the transient response to be optimized over a wide range of loads and output capacitors. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. The RT7247A also provides output under voltage protection and thermal shutdown protection. The low current (<3µA) shutdown mode provides output disconnection, enabling easy power management in battery-powered systems. The RT7247A is available in an SOP-8 (Exposed Pad) package.

Features

±1.5% High Accuracy Feedback Voltage
Current Mode Control
Fixed Frequency Operation : 340kHz
Output Adjustable from 0.8V to 15V
Up to 95% Efficiency
Programmable Soft-Start
Cycle-by-Cycle Over Current Protection

Specifications

Manufacturer	Richtek USA Inc.
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	EVB_RT7247AHGSP-ND
Eval Board Supplier	Richtek USA Inc.
Eval Board	Normally In Stock
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	3.3 V
Current Out	2 A
Voltage In	4.5 ~ 18 V
Efficiency @ Conditions	>93%, 4.5V in, 3.3V @ 100 ~ 750 mA >90%, 17V in, 3.3V @ 0.3 ~ 1.3 A >90%, 12V in, 3.3V @ 0.25 ~ 1.3 A
Voltage Out Range	0.8 ~ 15 V
Features	Current Limit (Adj. or Fixed) Soft Start Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	340 kHz
Standby Current [Typical]	500 nA
Quiescent Current [Typical]	800 µA
Component Count + Extras	15 + 15
Internal Switch	Yes
Design Author	Richtek USA Inc.
Application / Target Market	LCD and OLED Bias Supplies LCD Backlighting LCD TV / Monitor Point of Load (PoL) Power: Industrial Power RF: WLAN Access Points Set-Top Boxes White Goods
Standby Current [Maximum]	3 µA
Quiescent Current [Maximum]	1.2 mA
Main I.C. Base Part	RT7247A
Date Created By Author	2014-07
Date Added To Library	2022-06