AGREE

This website stores cookies on your computer. These cookies are used to collect information about how you interact with our website and allow us to remember you. We use this information in order to improve and customize your browsing experience and for analytics and metrics about our visitors both on this website and other media. To find out more about the cookies we use, see our Cookie Statement.
If you decline, your information won’t be tracked when you visit this website. A single cookie will be used in your browser to remember your preference not to be tracked. Find out more here.

RT6263A/RT6263B

17V Input, 3A, ACOT® Buck Converter with Both FETs OC Protection

RT6263A/RT6263B
New

The RT6263A/B is a simple, easy-to-use, 3A synchronous step-down DC-DC converter with an input supply voltage range of 4.5V to 17V. The device possesses an accurate reference voltage and integrates low RDS(ON) power MOSFETs to achieve high efficiency.
The RT6263A/B adopts Advanced Constant On-Time (ACOT®) control architecture to provide an ultrafast transient response with few external components and to operate at nearly constant switching frequency over the line, load, and output voltage range. The RT6263A operates in automatic PSM that maintains high efficiency during light load operation. The RT6263B operates in Forced PWM that helps meet tight voltage regulation accuracy requirements.
The RT6263A/B senses both FETs current for a robust overcurrent protection (OCP). The device features cycle-by-cycle current-limit protection to prevent the device from the catastrophic damage in output short circuit, overcurrent or inductor saturation conditions. The RT6263A/B offers programmable start-up by connecting a capacitor at external SS pin. The device also includes input undervoltage lockout, output undervoltage protection, and over-temperature protection (OTP) to provide safe and smooth operation in all operating conditions.
The recommended junction temperature range is -40°C to 125°C.

Applications

  • Set-Top Boxes
  • LCD TVs
  • Home Networking Devices
  • Surveillance
  • General Purpose

Key Spec.

RT6263A RT6263B
Status Active Active
Vin (min) (V) 4.5 4.5
Vin (max) (V) 17 17
Number of Outputs 1 1
Vout (min) (V) 0.765 0.765
Vout (max) (V) 7 7
Output Adj. Method Resistor Resistor
Iout (max) (A) 3 3
Current Limit (typ) (A) 4.2 4.2
Freq (typ) (kHz) 650 650
Ext Sync No No
Ron_HS (typ) (mOhm) 66 66
Ron_LS (typ) (mOhm) 36 36
Iq (typ) (mA) 0.18 0.18
Features ACOT Control;Adjustable Soft-Start;COT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;OTP;PSM;Power Good;SCP;Stable with Ceramic Capacitor;UVP ACOT Control;Adjustable Soft-Start;COT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;OTP;Power Good;SCP;Stable with Ceramic Capacitor;UVP
Package Type TSOT-28(FC) TSOT-28(FC)

Features

  • 3A Converter Integrated 66mΩ and 36mΩ FETs

  • Input Supply Voltage Range: 4.5V to 17V

  • Output Voltage Range: 0.765V to 7V

  • Advanced Constant On-Time (ACOT®) Control
    ► Ultrafast Transient Response
    ► Optimized for Low-ESR Ceramic Output Capacitors

  • High Accuracy Feedback Reference Voltage: Typ. ± 1%

  • Optional for Operation Modes:
    ► RT6263A: Power Saving Mode (PSM)
    ► RT6263B: Forced PWM Mode

  • Fixed Switching Frequency: 650kHz

  • Enable Control and Externally Adjustable Soft-Start

  • Input Undervoltage Lockout (UVLO)

  • Protection Function
    ► Output Undervoltage Protection (UVP) with Hiccup Mode
    ► High-/Low-side MOSFET OCP and OTP Function

  • Power Good Indication

Application Notes

Datasheet

DS6263AB-06.pdf

Datasheet

DS6263AB-06.pdf

RT6263AHGJ8F
Package Type:TSOT-28(FC)
Sample Buy
RT6263BHGJ8F
Package Type:TSOT-28(FC)
Sample Buy
Contact us for more information