Step-Down DC/DC + LDO

Synchronous Step-Down DC/DC + Low Input Voltage LDO

The XCM519 series is a multi combination module IC which comprises of a 600mA driver transistor built-in synchronous step–down DC/DC converter and low voltage input LDO regulator. Battery operated portable products require high efficiency so that a dual DC/DC converter is often used. The XCM519 can replace this dual DC/DC to eliminate one inductor and reduce output noise. The DC/DC converter and the LDO regulator blocks are isolated in the package so that noise interference from the DC/DC to the LDO regulator is minimal.

The synchronous DC/DC converter with a built-in 0.42Ohm P-channel and 0.52Ohm N-channel transistors can be used with ceramic capacitors and enables a high efficient, stable power supply with an output current of 600mA to be configured using only a coil and two capacitors connected externally.
The LDO regulator provides highly accurate (±20mV) outputs and can supply current efficiently due to its ultra low on-resistance even at low output voltages.

Available in a space saving ultra small USP-12B01 (2.8mm x 2.3mm x 0.6mm) package.
 

Key Features:
• Operating Voltage Range: 2.7V ~ 6.0V
• Bias Voltage Range: 2.5V ~ 6.0V
DC/DC Block
• Output Voltage: 0.8V ~ 4.0V
• Output Current: 600mA
• Switching Frequency: 1.2MHz, 3MHz
• Control: PWM, PWM/PFM Auto
• Soft-Start Circuit Built-in
LDO Block
• Output Voltage: 0.7V ~ 1.8V
• Output Current: >400mA
• Dropout Voltage: 35mV @ 100mA
• Supply Current: 25uA typ.
• CL High Speed Auto Discharge
 

Package: USP-12B01