LV5781 Datasheet, PDF (1/7 Pages) Sanyo Semicon Device – Bi-CMOS IC 3A, Point-of-load, Chopper-type Step-down Converter

Ordering number : ENA0663A
Bi-CMOS IC
LV5781 ^{3A, Point-of-load, Chopper-type}
Step-down Converter
Overview
The LV5781 is a 1-channel chopper-type (low-side Schottky diode) step-down switching regulator. It incorporates an
80mΩ (typical) power MOSFET to achieve high-efficiency operation for 3A output currents.
The output voltage is set internally to 3.3V. By adding two external resistors, it is possible to set the voltage to any
desired setting above 0.85V. Inrush current at startup can be prevented by the soft start function.
Using the ON/OFF pins, the converter can be set to standby mode in which the current consumption is 10µA or less. Both
the load and the IC are protected by means of the overcurrent and thermal protection functions. The converter uses the
HSSOP14 miniature package.
Functions
• 3A, 1-channel chopper-type, step-down switching regulator
• Output voltage: 3.3V
• Setting of any output voltage enabled (external resistors required)
• High efficiency: 90% at IOUT=1A, VO=3.3V
• Miniature package: HSSOP14
• Soft start function
• Standby mode
• Overcurrent protection
• Thermal shutdown
• Fixed frequency: 180kHz
Applications
• LCD TVs
• Game machines
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the performance, characteristics, and functions of the described products in the independent state, and are not
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13107 MS IM 20070112-S00004 No.A0663-1/7