Datasheet > RTQ2949A-QA

RTQ2949A-QA

更新时间： 2024-04-09 19:00:41

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
27页	610K
描述
42VIN, 3A, Asynchronous Step-Down Converter with Low Quiescent Current

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RTQ2949A-QA 数据手册

RTQ2949A-QA

42V_IN, 3A, Asynchronous Step-Down Converter with Low

Quiescent Current

General Description

Features

 AEC-Q100 Grade 1 Qualified

The RTQ2949Ais a 3A, high-efficiency, peak current mode

control asynchronous step-down converter. The device

operates with input voltages from 4V to 42V which is

optimized for automotive applications. The device can

program the output voltage between 0.8V to VIN and is

protected from load dump transients up to 65V which eases

input surge protection design. The low quiescent current

design with the integrated low R_DS(ON)of high-side

MOSFET achieves high efficiency over the wide load range.

The peak current mode control with simple external

compensation allows the use of small inductors and

results in fast transient response and good loop stability.

 FMEA Compliant Pinout

 Wide Input Voltage Range

 4.5V to 42V

 4V to 42V (Soft-start is finished)

 Wide Output Voltage Range : 0.8V to VIN

 0.8V 1.5% Reference Accuracy

 Peak Current Mode Control

 Integrated 150mΩ High-Side MOSFET

 Low Quiescent Current : 90μA

 Low Shutdown Current : 1.3μA

 Adjustable Switching : 100kHz to 2.5MHz

 Synchronizable Switching : 300kHz to 2.2MHz

 Power Saving Mode (PSM) at Light Load

 Built-In Spread-Spectrum Frequency Modulation

 Low Dropout at Light Loads with Integrated Boot

Recharge FET

The wide switching frequency of 100kHz to 2500kHz allows

for efficiency and size optimization when selecting the

output filter components. The ultra-low minimum on-time

enables constant-frequency operation even at very high

step-down ratios. For switching noise sensitive

applications, it can be externally synchronized from

300kHz to 2200kHz. The build-in spread-spectrum

frequency modulation further helping system designers

with better EMC management.

 Enable Control

 Adjustable UVLO Voltage and Hysteresis

 Adjacent Pin-Short Protection

 Built-In UVLO, UVP, OVP, OCP, OTP

The RTQ2949A provides complete protection functions

such as input under-voltage lockout, output under-voltage

protection, output over-voltage protection, over-current

protection, and thermal shutdown. Cycle-by-cycle current

limit provides protection against shorted outputs, and soft-

start eliminates input current surge during start-up. The

RTQ2949Ais available in SOP-8 (Exposed pad) packages.

Applications

 Automotive, Communications and Industrial 12V, 24V

Power Systems

 IndustrialAutomation and Motor Control

 Vehicle Accessories : GPS, Entertainment

 USB Charging Ports and Battery Chargers

Simplified Application Circuit

RTQ2949A

BOOT

VIN

BOOT

OUT

FB1

Enable Signal

FB2

COMP1

COMP

COMP2

RT/SYNC

PAD

GND

is a registered trademark of Richtek Technology Corporation.

DSQ2949A-QA-01 March 2021

www.richtek.com

12 3 4 5 6 7...27

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与RTQ2949A-QA相关器件

型号	品牌	描述	获取价格	数据表
RTQ2949-QA	RICHTEK	42VIN, 3A, Asynchronous Step-Down Converter with Low Quiescent Current	获取价格
RTQ2960-QA	RICHTEK	60VIN, 0.5A, Asynchronous Step-Down Converter with Low Quiescent Current	获取价格
RTQ2961-QA	RICHTEK	60VIN, 1.5A, Asynchronous Step-Down Converter with Low Quiescent Current	获取价格
RTQ2962-QA	RICHTEK	60VIN, 2.5A, Asynchronous Step-Down Converter with Low Quiescent Current	获取价格
RTQ2963-QA	RICHTEK	60VIN, 3.5A, Asynchronous Step-Down Converter with Low Quiescent Current	获取价格
RTQ2965-QA	RICHTEK	60VIN, 5A, Asynchronous Step-Down Converter with Low Quiescent Current	获取价格

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