Voltage - Input (Max):	18V
Supplier Device Package:	6-USPC (1.8x2)
Package / Case:	6-UFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 105°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	2.2MHz
Current - Output:	500mA
Voltage - Output (Max):	15V
Voltage - Output (Min/Fixed):	1V
Series:	--
Voltage - Input (Min):	3V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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XC9263B75DER-G application field and working principle

Introduction

XC9263B75DER-G is a DC-DC switching regulator (PMIC - Voltage Regulators - DC DC Switching Regulators) that is ideal for applications requiring a regulated 3.3V output with efficiency up to 96%. It features an internal 500mA switch, adjustable switching frequency up to 1.5MHz, and includes a PGOOD output for IC status indication. The XC9263B75DER-G has low quiescent current and integrated undervoltage lockout (UVLO), overcurrent protection (HK, OCP) and short-circuit protection (SCP). Furthermore, it integrates an adjustable soft-start circuit and output voltage sense compensation circuit, which improves transient performance and system reliability.

Application Field

The XC9263B75DER-G meets the needs of a variety of applications, such as for powering ASICs and DSPs, LED drivers and backlight drivers, PDAs and digital cameras, solid-state disks (SSDs), and optical devices. With its low ripple, high efficiency, and low output voltage (down to 0.9V), it is also suitable for powering up battery-powered devices.

Working Principle

The XC9263B75DER-G works by combining a switched-mode power supply (SMPS) output stage and an error amplifier into a single power management IC (PMIC). The chip uses an oscillator to generate a periodic waveform. This waveform drives an internal switch, which switches on and off at the appropriate times and carries the output current. An external inductor (L1) and capacitor (Cf) form the output filter, shaping the waveform into a steady dc output.The error amplifier compares the actual output voltage (Vo) with the voltage of the voltage reference, thus sensing the amount of error between them. This error is then used to adjust the pulse width of the switch driver output, thereby regulating the output voltage.When a load change occurs, the voltage peak of the output ripple nudges up or down. This pushes the error amplifier to adjust the duty cycle of the switched waveform up or down until the output voltage restores accustomed voltage.

Conclusion

The XC9263B75DER-G is one of the most efficient and reliable DC-DC switching regulators available. Its tiny size, low output voltage capability, built-in overcurrent protection, and adjustable soft-start make it ideal for a variety of applications. It is an excellent choice for powering ASICs, DSPs, LED drivers, backlight drivers, PDAs and digital cameras, solid-state disks (SSDs) and optical devices.

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