Inductor Built-in Step-up “micro DC/DC” Converter (micro DC/DC)
The XCL103 series is a synchronous step-up micro DC/DC converter which integrates an inductor and a control IC in one tiny package (2.0mm×2.5mm, h=1.0mm). A stable step-up power supply is configured using only two capacitors connected externally. An internal coil simplifies the circuit and enables minimization of noise and other operational trouble due to the circuit wiring.
A wide operating voltage range of 0.9V to 6.0V enables support for applications that require an internally fixed output voltage (2.2V to 5.5V).
During the devices enter stand-by mode, XCL103D type prevent the application malfunction by CL Discharge Function which can quickly discharge the electric charge at the output capacitor (CL). XCL103E type is able to drive Real Time Clock etc.
Typical Application Circuit
|Input Voltage Range||0.9V ~ 6.0V|
|Output Voltage Range||2.2V ~ 5.5V (±2.0%)
|Output Current||500mA@VOUT=5.0V, VBAT=3.3V (TYP.)
350mA@VOUT=3.3V, VBAT=1.8V (TYP.)
|Control Mode Selection||Auto PWM/PFM|
|Oscillation Frequency||3.0MHz (±20%)|
|Protection Circuits||Over-current limit (Integral latch method)
Output short-circuit protection
Load Disconnection Function (D type)
CL Auto Discharge Function (D type)
Bypass Switch Function (E type)
|Operating Ambient Temperature||-40 ~ +85℃|
|Environmentally Friendly||EU RoHS Compliant, Pb Free|
|Package||CL-2025-02||Number of Pins||6|
|Pcs/Reel||3,000||Package Size(mm)||2.0 x 2.5 x 1.04|
What is the soft-start function?
The function to soften the rise to prevent the inrush current.
How does the CL discharge function work?
The function rapidly releases the charge remained in the CL capacitor to make the VOUT pin voltage zero. The VOUT pin voltage does not reach zero immediately after being turned off by the CE function due to the charge remained in the connected CL capacitor. While the charge in the CL capacitor is gradually reaching zero, the LSI continues operating and does not work with the CE pin signal, which may cause a malfunction. This is why the discharge is required when turning off the CE pin. A larger capacitance of the capacitor needs longer time to be discharged.
What does CL mean?
Load capacitor. Other companies often refer to it as COUT.