FAN5355UC00X DC-DC Power Conversion by ON Semiconductor

1.1A / 1A / 0.8A, 3MHz Digitally Programmable Regulator

Semiconductors - ICs
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Status: Active
Series: FAN5355
RoHS: Compliant
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The FAN5355 device 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 FAN5355 supports up to 800mA, 1A, or 1.1A load current. The device 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, the device supports low-voltage DSPs and processors, core power supplies, and memory modules in smart phones, PDAs, and handheld computers. The FAN5355 operates at 3MHz (nominal) fixed switching frequency using either its internal oscillator or external SYNC frequency. 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 VOUT. In hardware shutdown, the current consumption is reduced to less than 200nA. The serial interface is compatible with Fast/Standard 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 FAN5355 is available in 10-lead MLP (3x3mm) and 12-bump CSP packages.

Where to Buy

Prices starting from US$0.56

Distributor Stock
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Rochester Electronics
from US$0.56
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in stock
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Farnell
from US$0.93
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Avnet America
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EBV Elektronik
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Features

93% Efficiency at 3MHz
800mA, 1A, or 1.1A Output Current
I2C-Compatible Interface up to 3.4Mbps
6-bit VOUT Programmable from 0.75V to 1.975V
2.7V to 5.5V Input Voltage Range
3MHz Fixed-Frequency Operation
Excellent Load and Line Transient Response
Small Size, 1µH Inductor Solution
±2% PWM DC Voltage Accuracy
35ns Minimum On-Time
High-Efficiency, Low-Ripple, Light-Load PFM
Smooth Transition between PWM and PFM
37µA Operating PFM Quiescent Current
Pin-Selectable or I2C™ Programmable Output Voltage
10-lead MLP (3 x 3mm) or 12-bump CSP Packages
On-the-Fly External Clock Synchronization
Applications
TBA

Specifications

Description FAN5355
Compliance Pb-free Halide free
Topology Step-Down
Control Mode Voltage Mode
VCC Min (V) 2.7
VCC Max (V) 5.5
VO Typ (V) Adjustable
IO Typ (A) 0.8
Efficiency (%) 93
fSW Typ (kHz) 3000
Package Type WLCSP-12

Last 6 months Inventory & Pricing History

Alternative Descriptions

VOLTAGE REGULATOR, BUCK, 0.8A, WLCSP-12 | Farnell

Frequently Asked Questions

Where can I find additional details, specifications and documents for a FAN5355UC00X?

Additional datasheets, footprints and schematics for FAN5355UC00X are listed on our Part Details page. You can also find images and similar parts to FAN5355UC00X on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for FAN5355UC00X on our Product Comparison page. Access via the 'View Pricing & Stock' button to view FAN5355UC00X price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does FAN5355UC00X fall under?

The FAN5355UC00X is listed under Power Management > DC-DC Power Conversion > Converters.

Can I view similar or alternative parts?

You can view similar parts to FAN5355UC00X when available in the Converters range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the FAN5355UC00X you can contact the distributor directly for product support, shipping queries etc.

Is the FAN5355UC00X RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by ON Semiconductor.

Which authorised distributors for FAN5355UC00X have stock available?

Authorised distributors including Rochester Electronics, Farnell, Avnet America and EBV Elektronik have stock available or on a lead time for FAN5355UC00X.

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