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US3034

Features: ·8 pin SOIC Switching Controller with·HICCUP Current Limiting Reduces Diode·Power Dissipation to Less than 1% of Normal·Operation·Soft Start Capacitor allows for smooth Output·Voltage ramp up·On board MOSFET driver·Fastest transient response of any controller method. ( 0 to 100% Duty Cyc...

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SeekIC No. : 004538651 Detail

US3034: Features: ·8 pin SOIC Switching Controller with·HICCUP Current Limiting Reduces Diode·Power Dissipation to Less than 1% of Normal·Operation·Soft Start Capacitor allows for smooth Output·Voltage ramp...

US3034 Data Sheet

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Part Number:
US3034
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/22

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Product Details

Description



Features:

·8 pin SOIC Switching Controller with
·HICCUP Current Limiting Reduces Diode
·Power Dissipation to Less than 1% of Normal
·Operation
·Soft Start Capacitor allows for smooth Output
·Voltage ramp up
·On board MOSFET driver
·Fastest transient response of any controller method. ( 0 to 100% Duty Cycle in 100 nS )
·1% internal voltage reference
·Internal Under Voltage Lockout protects
·MOSFET during start-up


Application

·Dual supply low voltage processor applications, such as: P55Cä,CYRIX M2ä, POWER PCä and AMD K6ä
·Simple 5V to 3.3V switcher for Pentium with AGP or Pentium IIä applications


Pinout

Connection Diagram


Specifications

V12 Supply Voltages ............................................................. 20V
F.B Pin Voltages........................................................  -0.3V to 5V
Storage Temperature Range ................................. -65 TO 150°C
Operating Junction Temperature ...............................0 TO 150°C


Description

The US3034 IC provides an 8 pin low cost switching controller with true short circuit protection all in a compact 8 pin surface mount package, providing a low cost switching solution for dual supply processor applications that require switching regulator for the 3.3V supply such as the applications with AGP on board. Typically in these applications of US3034 a dual supply regulator converts 5V to 3.3V for I/O supply and a jumper programmable supply of 1.25V to 3.5V for CORE supply .

The IC US3034 uses an internal regulator generated from the 12V supply to power the controller as well as the 12V supply to drive the power MOSFET, allowing a low cost N channel MOSFET to be used. The IC US3034 also includes an error comparator for fast transient response, a precise voltage reference for setting the output voltage as well as a direct drive of the MOSFET for the minimum part count.




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