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.

RT8105

5V/12V Synchronous Buck PWM DC-DC Controller

RT8105
New

The RT8105 is a high efficiency synchronous buck PWM controllers that generate logic-supply voltages in PC based systems. These high performance , single output devices include internal soft-start, frequency compensation networks and integrates all of the control, output adjustment, monitoring and protection functions into a single package.
The device operating at fixed 300kHz frequency provides an optimum compromise between efficiency, external component size, and cost.
Adjustable over-current protection (OCP) monitors the voltage drop across the RDS(ON) of the lower MOSFET for synchronous buck PWM DC-DC controller. The over-current function cycles the soft-start in 4-times hiccup mode to provide fault protection, and in an always hiccup mode for under-voltage protection.

Applications

  • Graphic Card
  • Motherboard, Desktop Servers
  • IA Equipments
  • Telecomm Equipments
  • High Power DC-DC Regulators

Key Spec.

RT8105
Status NRND
Recommended Alternative  RT8120E/RT8120F
Vs (typ) (V) 12;5
Vin (min) (V) 3.3
Vin (max) (V) 12
Vout (min) (V) 0.8
Vout (max) (V) 5
Output Adj. Method Resistor
Accuracy (+/- %) 2
Freq (typ) (kHz) 300
Iq (typ) (mA) 6
Ext Sync No
Features Force PWM;OCP;OVP;SCP;UVP;Voltage Mode Control
Package Type SOP-8

Features

  • Operating with 5V or 12V Supply Voltage

  • Drives All Low Cost N-MOSFETs

  • Voltage Mode PWM Control

  • 300kHz Fixed Frequency Oscillator

  • Fast Transient Response :
      ♦ High-Speed GM Amplifier
      ♦ Full 0 to 100% Duty Ratio

  • Internal Soft-Start

  • Adaptive Non-Overlapping Gate Driver

  • Over-Current Fault Monitor on MOSFET, No Current Sense Resistor Required

  • Full-Time Over Voltage Protection

  • RoHS Compliant and Halogen Free

Contact us for more information