Datasheet > RTQ2118C-QA

RTQ2118C-QA

更新时间： 2025-07-26 17:00:47

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
44页	1256K
描述
USB Type-C DFP with Charging Port Controller and Integrated 36V 3.5A Synchronous Buck Converter

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RTQ2118C-QA 数据手册

RTQ2118C-QA

USB Type-C DFP with Charging Port Controller and

Integrated 36V 3.5A Synchronous Buck Converter

General Description

The RTQ2118C combines a USB Type-C Downstream

Facing Port (DFP) controller, charging port controller

and a 3.5A synchronous buck converter.

Type C-to-B dongle. Type-A connector support is

provided by the RTQ2118C.

Features

The RTQ2118C monitors the Type-C Configuration

Channel (CC) lines to detect an Upstream Facing Port

(UFP) device attach event, then turns on external VBUS

MOSFET to apply power to VBUS and communicates

the selectable VBUS current sourcing capability.

⚫ USB Type-C DFP Controller

 Compliant to USB-IF standards

 USB Type-C Specification Release 2.0

 CC Logic, VCONN Source

 VCONN 1W

The RTQ2118C provides the electrical signatures on

D+/D- to support charging schemes compatible with the

USB 2.0 Battery Charging Specification BC1.2 and

Chinese Telecommunication Industry Standard YD/T

1591-2009. Auto-detect mode is also integrated which

supports USB 2.0 Battery Charging Specification BC1.2

Dedicated Charging Port (DCP), Divider 3 mode and

1.2V shorted mode to comply with the legacy fast

charging mode of mobile devices.

 Connector Attach/Detach Detection

 STD/1.5A/3A Capability Advertisement on CC

 Gate Driver for External Blocking FET Control

⚫ USB Charging Port Controller

 Automatic DCP modes

 DCP Shorted Mode and YD/T 1591-2009

 2.7V Divider 3 Mode

 1.2V Mode

⚫ 36V 3.5A Synchronous Buck Converter

 3V to 36V Input Voltage Range

 3.5A Continuous Output Current

 CC/CV Mode Control

The RTQ2118C integrates a high efficiency, monolithic

synchronous buck converter that can deliver up to 3.5A

output current from a 3V to 36V wide range input supply

and is protected from load-dump transients up to 42V.

 Adjustable and Synchronizable Switching

Frequency : 300kHz to 2.2MHz

 Selectable PSM/PWM at Light Load

 Adjustable Soft-Start

The RTQ2118C has constant current control to achieve

adjustable USB current limit and implement the current

sense signal for adjustable USB power output voltage

with load line compensation. The converter includes

optional spread-spectrum frequency modulation to

overcome EMI issue and complete protection for safe

and smooth operation in all applied conditions.

Protection features include cycle-by-cycle current limit

for protection against shorted outputs, soft-start control

to eliminate input current surge during start-up, input

under-voltage lockout, output under-voltage protection,

output over-voltage protection and over-temperature

protection.

 Adjustable USB Power Output Voltage between

5V and 5.5V with Load Line Compensation

 Optional Spread-Spectrum Frequency

Modulation for EMI Reduction

⚫ Auto Discharge VBUS when CC Pins Detach

⚫ Protection Function

 VCONN with Current Limit

 CC Pin OVP Protection

 DS+/DS- OVP

 Over-Temperature Protection

 Cycle-by-Cycle Over-Current Limit Protection

 Input Under-Voltage Protection

 VBUS Over-Voltage Protection

 Adjacent Pin-Short Protection

⚫ Power Good Indicator

The RTQ2118C is fully specified over the temperature

range of T = −40°C to 125°C and available in WET-

WQFN-40L 6x6.

The RTQ2118C can be used to support Type-C

connectors including the Type C-to-C dongle and the

⚫ Enable Control

is a registered trademark of Richtek Technology Corporation.

DSQ2118C-QA-01

November 2023

www.richtek.com

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