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COT Control, 6.0A Synchronous Step-Down DC/DC Converters

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APPLICATIONS

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PC

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Graphic board

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Storage

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Industrial application

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FPGA

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SSD

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ASIC

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DSP

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FEATURES

Input Voltage Range

: 2.7V～5.5V

Output Voltage Range

: 0.8V～3.6V

FB Voltage

: 0.6V±1.0%

Output Current

: 6.0A

Oscillation Frequency

: 1.2MHz, 3.0MHz

Efficiency

Control Methods

: HiSAT-COT Control

100% Duty Cycle

Mode select between

Fixed PWM and PWM/PFM Auto

Protection Circuits

: Thermal Shutdown

Current Limit (Pendent character)

HICCUP or Short Circuit Protection

Functions

: UVLO , Soft-Start, Soft-off

Capacitor

: Ceramic Capacitor

Operating Ambient Temperature

:- 40℃ ～ + 105℃

Package

: QFN0404-24C

Environmentally Friendly

: EU RoHS Compliant, Pb Free

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TYPICAL APPLICATION CIRCUIT

ETR05051-001

☆

Green Operation-compatible

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GENERAL DESCRIPTION

The XC9266 series is a group of synchronous-rectification type DC/DC converters with a built-in 32mΩ P-channel MOS driver

transistor and 25mΩ N-channel MOS switching transistor, designed to allow the use of ceramic capacitors. The small on-resistances

of these two internal driver transistors enable a high efficiency, stable power supply with an output current up to 6.0A. A 0.6V

reference voltage source is incorporated, and the output voltage can be set freely by external resistors. Oscillation frequency is set

to 1.2MHz or 3.0MHz can be selected for suiting to your particular application. The operation mode is HISAT-COT (*) control, which

has an excellent transient response. PWM control or PWM/PFM auto switching control can be selected at the MODE1 pin, and a

high-speed response, low ripple, and high efficiency are achieved across the entire load range (from light loads to heavy loads).

During stand-by, all circuits are shutdown to reduce current consumption to as low as 1.0μA or less. As for the soft-start function as

fast as 0.25ms in typical for quick turn-on. The soft start time can be set as desired by adding an external capacitance to the SS

pin. Internal protection circuits include over current protection, short-circuit protection, and thermal shutdown circuits to enable safe

use. Short circuit protection or Hiccup mode can be selected at the MODE2 pin.

in a stand-by mode. Soft-off function can be selected at the MODE3 pin. The package is the QFN0404-24C (4mm×4mm).

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TYPICAL PERFORMANCE

CHARACTERISTICS

0

20

40

60

80

100

1

10

100

1000

10000

PWM/PFM

PWM

CE

MODE1

PG

SS

AGND

FB

PGND

MODE2

MODE3

L