The XCL205/XCL206/XCL207 series is a synchronous step-down micro
DC/DC converter which integrates an inductor and a control IC
in one tiny package (2.5mm2.0mm, H=1.0mm).
A stable power supply with an output current of 600mA is configured
using only two capacitors connected externally.
Operating voltage range is from 2.0V to 6.0V. Output voltage is
internally set in a range from 0.8V to 4.0V in increments of 0.05V.
The device is operated by 3.0MHz, and includes 0.42P-channel driver
transistor and 0.52N-channel switching transistor.
As for operation mode, the XCL205 series is PWM control, the XCL206
series is automatic PWM/PFM switching control and
the XCL207 series can be manually switched between the PWM control
mode and the automatic PWM/PFM switching control mode,
allowing fast response, low ripple and high efficiency over the
full range of loads (from light load to heavy load).
During stand-by, the device is shutdown to reduce current
consumption to as low as 1.0A or less.
With the built-in UVLO (Under Voltage Lock Out) function, the
internal driver transistor is forced OFF when input voltage becomes
1.4V or lower.
XCL205B/XCL206B/XCL207B series provide short-time turn-on by the
soft start function internally set in 0.25 ms (TYP).
XCL205B(C) /XCL206 B(C) / XCL207B(C) integrate CL auto discharge
function which enables the electric charge stored at the output
CL to be discharged via the internal auto-discharge switch located
between the LX and VSS pins.
When the devices enter stand-by mode, output voltage quickly
returns to the VSS level as a result of this function.