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RT6352A/RT6352B

17V Input, 2A, ACOT® Buck Converter with Both FETs OC Protection

RT6352A/RT6352B
New

The RT6352A/B is a simple, easy-to-use, 2A 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 RT6352A/B adopts Advanced Constant On-Time (ACOT®) control architecture to provide an ultrafast transient response with few external components and to operate in nearly constant switching frequency over the line, load, and output voltage range. The RT6352A operates in automatic PSM that maintains high efficiency during light load operation. The RT6352B operates in Forced PWM that helps meet tight voltage regulation accuracy requirements.

The RT6352A/B senses both FETs current for a robust over-current protection (OCP). The device features cycle-by-cycle current limit protection to prevent the device from the catastrophic damage in output short circuit, over-current or inductor saturation conditions. A built-in soft-start function prevents inrush current during start-up. The device also includes input under-voltage lockout, output under-voltage protection, and over-temperature protection (OTP) to provide safe and smooth operation in all operating conditions.

Applications

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

Key Spec.

RT6352A RT6352B
Status Active Active
Vin (min) (V) 4.5 4.5
Vin (max) (V) 17 17
Number of Outputs 1 1
Vout (min) (V) 0.6 0.6
Vout (max) (V) 7 7
Output Adj. Method Resistor Resistor
Iout (max) (A) 2 2
Current Limit (typ) (A) 3.2 3.2
Freq (typ) (kHz) 580 580
Ext Sync No No
Ron_HS (typ) (mOhm) 140 140
Ron_LS (typ) (mOhm) 84 84
Iq (typ) (mA) 0.28 0.28
Features ACOT Control;COT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;OTP;PSM;SCP;Stable with Ceramic Capacitor;UVP ACOT Control;COT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Force PWM;OCP;OTP;SCP;Stable with Ceramic Capacitor;UVP
Package Type TSOT-26(FC);SOT-563(FC) TSOT-26(FC);SOT-563(FC)

Features

  • 2A Converter Integrated 140mΩ and 84mΩ FETs

  • Input Supply Voltage Range : 4.5V to 17V

  • Output Voltage Range : 0.6V 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 :
    ► Automatically Power Saving Mode (PSM) (RT6352A)
    ► Forced PWM Mode (RT6352B)

  • Fixed Switching Frequency : 580kHz

  • Enable Control and Internally Fixed Soft-Start

  • Safe Start-Up from Pre-biased Output

  • Input Under-Voltage Lockout (UVLO)

  • Output Under-Voltage Protection (UVP) with Hiccup Mode

  • High- /Low-side MOSFET OCP and OTP Function

  • RoHS Compliant and Halogen Free

Application Notes

Datasheet

DS6352AB-00.pdf

Datasheet

DS6352AB-00.pdf

Contact us for more information