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kB3440

Features: ·Single Inductor· Fixed Frequency Operation with Battery Voltages Above, Below or Equal to the Output· Synchronous Rectification: Up to 96% Efficiency· 40µA Quiescent Current in Burst Mode® Operation· Up to 600mA Continuous Output Current· No Schottky Diodes Required (VOUT <...

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SeekIC No. : 004384114 Detail

kB3440: Features: ·Single Inductor· Fixed Frequency Operation with Battery Voltages Above, Below or Equal to the Output· Synchronous Rectification: Up to 96% Efficiency· 40µA Quiescent Current in Burs...

kB3440 Data Sheet

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Part Number:
kB3440
Supply Ability:
5000

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

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Product Details

Description



Features:

· Single Inductor
· Fixed Frequency Operation with Battery Voltages Above, Below or Equal to the Output
· Synchronous Rectification: Up to 96% Efficiency
· 40µA Quiescent Current in Burst Mode® Operation
· Up to 600mA Continuous Output Current
· No Schottky Diodes Required (VOUT < 4.3V)
· VOUT Disconnected from VIN During Shutdown
· 2.5V to 5.5V Input and Output Range
· Programmable Oscillator Frequency from 300kHz to 2MHz
· Synchronizable Oscillator
· Burst Mode Enable Control
· 5 µA Shutdown Current
· Small Thermally Enhanced 10-Pin MSOP and (3mm × 3mm) DFN Packages


Application

· Palmtop Computers
· Handheld Instruments
· MP3 Players
· Digital Cameras


Pinout

Connection Diagram


Specifications

VIN, VOUT Voltage.............................................. 0.3V to 6V
SW1, SW2 Voltage ............................................ 0.3V to 6V
VC, RT, FB, SHDN/SS, MODE/SYNC Voltage ........ 0.3V to 6V
Operating Temperature Range (Note 2) .......... 40 to 85
Storage Temperature Range ......................... 65 to 125
Lead Temperature (Soldering, 10 sec).......................... 300


Description

The kB3440 is a high efficiency, fixed frequency, Buck- Boost DC/DC converter that operates from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for single lithium-ion, multicell alkaline or NiMH applications where the output voltage is within the battery voltage range.

The kB3440 includes two 0.19N-channel MOSFET switches and two 0.22 P-channel switches. Switching frequencies up to 2MHz are programmed with an external resistor and the oscillator can be synchronized to an external clock. Quiescent current is only 40µA in Burst Mode operation, maximizing battery life in portable applications. Burst Mode operation is user controlled and can be enabled by driving the MODE/SYNC pin high. If the
MODE/SYNC pin has either a clock or is driven low, then voltage range. fixed frequency switching is enabled.

Other features include a 1µA shutdown, soft-start control, thermal shutdown and current limit. The kB3440 is available in the 10-pin thermally enhanced MSOP and (3mm * 3mm) DFN packages.




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