5 A, 2.4 MHz, Digitally Programmable TinyBuck™ Regulator

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Overview

The FAN53555 is a step-down switching voltage regulator that delivers a digitally programmable output from an input voltage supply of 2.5 V to 5.5 V. The output voltage is programmed through an I2C interface capable of operating up to 3.4 MHz.
Using a proprietary architecture with synchronous rectification, the FAN53555 is capable of delivering 5 A continuous at over 80% efficiency, while maintaining over 80% efficiency at load currents as low as 10 mA. Pulse currents as high as 6.5 A can be supported by the 05 option. The regulator operates at a nominal fixed frequency of 2.4 MHz, which reduces the value of the external components to 330 nH for the output induction and as low as 20 µF for the output capacitor. Additional output capacitance can be added to improve regulation during load transients without affecting stability. Inductance up to 1.2 µH may be used with additional output capacitance.
At moderate and light loads, Pulse Frequency Modulation (PFM) is used to operate in Power-Save Mode with a typical quiescent current of 60 µA. Even with such a low quiescent current, the part exhibits excellent transient response during large load swings. At higher loads, the system automatically switches to fixed-frequency control, operating at 2.4 MHz. In Shutdown Mode, the supply current drops below 1 µA, reducing power consumption. PFM Mode can be disabled if constant frequency is desired. The FAN53555 is available in a 20-bump, 1.6 x 2 mm, WLCSP.

  • Fixed-Frequency Operation: 2.4 MHz
  • Best-in-Class Load Transient
  • Continuous Output Current Capability: 5 A
  • Pulse Current Capability: 6.5 A (05 Option)
  • 2.5 V to 5.5 V Input Voltage Range
  • Digitally Programmable Output Voltage:
  • 00/01/03/05/08 Options: 0.60-1.23 V in 10 mV Steps
  • 04/042 Option: 0.603-1.411 V in 12.826 mV Steps
  • Programmable Slew Rate for Voltage Transitions
  • I2C-Compatible Interface Up to 3.4 Mbps
  • PFM Mode for High Efficiency in Light Load
  • Quiescent Current in PFM Mode: 60 µA (Typical)
  • Internal Soft-Start
  • Input Under-Voltage Lockout (UVLO)
  • 20-Bump Wafer-Level Chip Scale Package (WLCSP)
  • Thermal Shutdown and Overload Protection

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FAN53555BUC79X

Active

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

Y

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

$0.3871

More Details

FAN53555BUC18X

Active

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

Y

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

$0.3805

More Details

FAN53555UC04X

Active

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

Y

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

$0.368

More Details

FAN53555BUC05X

Active

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

Y

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

$0.3805

More Details

FAN53555UC03X

Active

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

Y

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

$0.3805

More Details

FAN53555UC13X

Active

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

Y

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

$0.3805

More Details

FAN53555UC01X

Active

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

Y

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

$0.4409

More Details

FAN53555UC00X

Active

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

Y

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

$0.3805

More Details

FAN53555UC24X

Active

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

Y

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

$0.3256

More Details

FAN53555BUC13X

Active

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

Y

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

$0.3008

More Details

FAN53555BUC24X

Active

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

Y

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

$0.3669

More Details

FAN53555BUC23X

Active

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

Y

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

$0.4396

More Details

FAN53555UC042X

Active

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

Y

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

$0.3525

More Details

FAN53555UC09X

Obsolete

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

N

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

Price N/A

More Details

FAN53555UC08X

Obsolete

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

N

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

Price N/A

More Details

FAN53555BUC09X

Last Shipments

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

N

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

Price N/A

More Details

FAN53555BUC08X

Active

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

Y

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

$0.3384

More Details

FAN53555UC18X

Obsolete

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

N

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

Price N/A

More Details

FAN53555UC05X

Obsolete

Pb

A

H

P

WLCSP-20

1

260

REEL

3000

N

Step-Down

Voltage Mode

2.5

5.5

Adjustable

5

80

2400

Price N/A

More Details

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