GENERAL DESCRIPTION

The XCM526 series is a multi-module IC which includes a step-down DC/DC controller IC and P-channel power MOSFET. The IC enables a high efficiency, stable power supply with an output current up to 3A. Low ESR electrolytic capacitors such as an OS-CON aluminum solid capacitor, a tantalum Neo capacitor can be used as an output capacitor. In case of using a ceramic capacitor, RSENSE is needed to be placed on.

The XCM526 series has a 0.9V (±1.5) reference voltage, and using externally connected resistors, the output voltage can be set freely. With an internal switching frequency of 500kHz and 1.0MHz, small external components can also be used. The XCM526A has a fixed PWM control for low output voltage ripple, and the XCM526B has a PWM/PFM control, which automatically switches from PWM to PFM during light loads and high efficiencies can be achieved over a wide range of load conditions. As for the soft-start time, there are two types, one is internally set to 4ms and the other can be externally set-up. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 2.3V (TYP.) or lower.

■ FEATURES

Operating Voltage Range : 4.0V ~ 16.0V

Output Voltage Externally Set Range : 1.2V ~ (standard 0.9V +1.5)

Maximum Output Current : 3.0A

Oscillation Frequency : 500kHz, 1.0MHz

Control Methods : PWM control (XCM526A) PWM/PFM automatic switching (XCM526B)

Soft-Start Function : 4ms internally fixed and externally set

Protection Circuits : Short-circuit protection

ON Resistance : 70mΩ (VGS=-4.5V)

47mΩ (VGS=-10.0V)

Package : USP-12B01 (2.3mm x 2.8mm)

Environmentally Friendly : EU RoHS Compliant, Pb Free

■ APPLICATIONS

● LCD TVs

● DSC/DVCs

● Portable games

● Portable equipments