Datasheet > RTQ2945A-QA

RTQ2945A-QA

更新时间： 2024-12-02 17:02:11

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
28页	661K
描述
42VIN, 5A, Asynchronous Step-Down Converter with Low Quiescent Current

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RTQ2945A-QA 数据手册

RTQ2945A-QA

42V_IN, 5A, Asynchronous Step-Down Converter with Low

Quiescent Current

General Description

Features

 AEC-Q100 Grade 1 Qualified

The RTQ2945Ais a 5A, high-efficiency, peak current mode

control asynchronous step-down converter which is

optimized for automotive applications. The device operates

with input voltages from 4V to 42V and is protected from

load dump transients up to 45V which eases input surge

protection design. The device can program the output

voltage between 0.8V to VIN. 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% Reference Accuracy

 Peak Current Mode Control

 Integrated 70mΩ High-Side MOSFET

 Low Quiescent Current : 100μA

 Low Shutdown Current : 2.25μA

 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 RTQ2945A 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

RTQ2945Ais available in SOP-8 (Exposed pad) package.

Applications

 Automotive, Communications and Industrial 12V and 24V

Power Systems

 IndustrialAutomation and Motor Control

 Vehicle Accessories : GPS, Entertainment

 USB Charging Ports and Battery Chargers

Simplified Application Circuit

BOOT

RTQ2945A

VIN

BOOT

OUT

FB1

Enable Signal

FB2

COMP1

COMP

COMP2

RT/SYNC

PAD

GND

is a registered trademark of Richtek Technology Corporation.

DSQ2945A-QA-01 March 2021

www.richtek.com

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与RTQ2945A-QA相关器件

型号	品牌	获取价格	描述	数据表
RTQ2945-QA	RICHTEK	获取价格	42VIN, 5A, Asynchronous Step-Down Converter with Low Quiescent Current
RTQ2949A-QA	RICHTEK	获取价格	42VIN, 3A, Asynchronous Step-Down Converter with Low Quiescent Current
RTQ2949-QA	RICHTEK	获取价格	42VIN, 3A, Asynchronous Step-Down Converter with Low Quiescent Current
RTQ2960-QA	RICHTEK	获取价格	60VIN, 0.5A, Asynchronous Step-Down Converter with Low Quiescent Current
RTQ2961-QA	RICHTEK	获取价格	60VIN, 1.5A, Asynchronous Step-Down Converter with Low Quiescent Current
RTQ2962-QA	RICHTEK	获取价格	60VIN, 2.5A, Asynchronous Step-Down Converter with Low Quiescent Current
RTQ2963-QA	RICHTEK	获取价格	60VIN, 3.5A, Asynchronous Step-Down Converter with Low Quiescent Current
RTQ2965-QA	RICHTEK	获取价格	60VIN, 5A, Asynchronous Step-Down Converter with Low Quiescent Current
RTQ-35V101MH10UQ-R2	TAIYO YUDEN	获取价格	FOR AUTOMOTIVE VERTICAL CHIP TYPE ALUMINUM ELECTROLYTIC CAPACITORS[RTQ]
RTQ-35V151MH10UQ-R2	TAIYO YUDEN	获取价格	FOR AUTOMOTIVE VERTICAL CHIP TYPE ALUMINUM ELECTROLYTIC CAPACITORS[RTQ]

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