Name: 1A/0.8A, 6MHz Digitally Programmable Regulator
Brand: 1A/0.8A, 6MHz Digitally Programmable Regulator
SKU: FAN5365

1A/0.8A, 6MHz Digitally Programmable Regulator

Obsolete

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Overview

The FAN5365 is a high-frequency, ultra-fast transient response, synchronous step-down, DC-DC converter optimized for low-power applications using small, low-cost inductors and capacitors. The FAN5365 supports up to 800mA or 1A load current.
The FAN5365 is ideal for mobile phones and similar portable applications powered by a single-cell Lithium-Ion battery. With an output voltage range adjustable via I²C interface from 0.75V to 1.975V, it supports low-voltage DSPs and processors, core power supplies, and memory modules in smart phones, data cards, and hand-held computers. The FAN5365 operates at 6MHz (nominal) fixed switching frequency in PWM mode.
During light-load conditions, the regulator includes a PFM Mode to enhance light-load efficiency. The regulator transitions smoothly between PWM and PFM Modes with no glitches on V_OUT. In hardware shutdown, the current consumption is reduced to less than 200nA.
The serial interface is compatible with Fast / Standard Mode, Fast Mode Plus, and High-Speed Mode I²C™ specifications, allowing transfers up to 3.4Mbps. This interface is used for dynamic voltage scaling with 12.5mV voltage steps, for reprogramming the mode of operation (PFM or forced PWM), or to disable/enable the output voltage.
The chip's advanced protection features include short-circuit protection and current and temperature limits. During a sustained over-current event, the IC shuts down and restarts after a delay to reduce average power dissipation into a fault.
During startup, the IC controls the output slew rate to minimize input current and output overshoot at the end of soft-start. The IC maintains a consistent soft-start ramp, regardless of output load during startup. The FAN5365 is available in a 1.27 x 1.29mm, 9-bump WLCSP package.

High Efficiency (>88%) at 6MHz
800mA or 1A Output Current
Regulation Maintained with V_IN from 2.3V to 5.5V
6-Bit V_OUT Programmable from 0.75 to 1.975V
6MHz Fixed-Frequency Operation (PWM Mode)
Excellent Load and Line Transient Response
Small Size, 470nH Inductor Solution
±2% DC Voltage Accuracy in PWM Mode
25ns Minimum On-Time
High-Efficiency, Low-Ripple, Light-Load PFM
Smooth Transition between PWM and PFM
40µA Operating PFM Quiescent Current
I²C-Compatible Interface up to 3.4Mbps
Pin-Selectable or I²C™ Programmable Output Voltage
9-Bump, 1.27 x 1.29mm, 0.4mm Pitch WLCSP Package

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FAN5365UC00X

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