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SC4609

Features: 􀂋` Asynchronous start up􀂋` Programmable switching frequency up to 1MHz􀂋` BiCMOS voltage mode PWM controller􀂋` 2.7V to 5.5V input voltage range􀂋` Output voltage as low as 0.5V􀂋` +/-1% reference accuracy􀂋` Sleep mode (Icc = 10A...

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SeekIC No. : 004485638 Detail

SC4609: Features: 􀂋` Asynchronous start up􀂋` Programmable switching frequency up to 1MHz􀂋` BiCMOS voltage mode PWM controller􀂋` 2.7V to 5.5V input voltage range􀂋...

SC4609 Data Sheet

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Part Number:
SC4609
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: 2024/12/24

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Product Details

Description



Features:

􀂋` Asynchronous start up
􀂋` Programmable switching frequency up to 1MHz
􀂋` BiCMOS voltage mode PWM controller
􀂋` 2.7V to 5.5V input voltage range
􀂋` Output voltage as low as 0.5V
􀂋` +/-1% reference accuracy
􀂋` Sleep mode (Icc = 10A typ)
􀂋` Adjustable lossless short circuit current limiting
􀂋` Combination pulse by pulse & hiccup mode current limit
􀂋` High efficiency synchronous switching
􀂋` 1A peak current driver
􀂋` External soft start
􀂋` 12-pin MLP Lead-free package, fully WEEE and RoHS compliant


Application

􀂋· Distributed power architecture
􀂋· Servers/workstations
􀂋· Local microprocessor core power supplies
􀂋· DSP and I/O power supplies
􀂋· Battery-powered applications
􀂋· Telecommunications equipment
􀂋· Data processing applications


Pinout

Connection Diagram


Specifications

Parameter Symbol Maximum Units
Supply Voltage (V CC)   6 V
PGND   ±0.3 V
Output Drivers (DRVH, DRVL) Currents
Continuous
Peak		   ±0.25 A
  ±1.00 A
Inputs (VSENSE, COMP, FSET, ISET, SS)   -0.3 to 6 V
BST   12 V
PHASE   -0.3 to 6 V
PHASE Pulse tpulse < 50ns   -2 to 7 V
Operating Ambient Temperature Range TA -40 to +85
Storage Temperature Range TSTG -65 to +150
Maximum Junction Temperature TJ +150
Peak IR Reflow Temperature, 10 - 40s TPKG 260
ESD Rating (Human Body Model) ESD 4 kV
All voltages with respect to AGND. Currents are positive into, negative out of the specified terminal.


Description

The SC4609 is a voltage mode step down (buck) regulator controller that provides accurate high efficiency power conversion from an input supply range of 2.7V to 5.5V. A high level of integration reduces external component count, and makes it suitable for low voltage applications where cost, size and efficiency are critical. The SC4609 is capable of producing an output voltage as low as 0.5V.

The SC4609 drives external, N-channel MOSFETs with a peak gate current of 1A. A non-overlap protection is provided for the gate drive signals to prevent shoot through of the MOSFET pair. The SC4609 features lossless current sensing of the voltage drop across the drain to source resistance of the high side MOSFET during its conduction period. Its switching frequency can be programmed up to 1MHz.

The quiescent supply current in sleep mode is typically lower than 10A. A external soft start is provided to prevent output voltage overshoot during start-up.

The SC4609 is an ideal choice for converting 3.3V, 5V or other low input supply voltages. It's available in 12 pin MLP package.




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