GENERAL DESCRIPTION
The XC9213 series is N-ch ＆ N-ch drive, synchronous, step-down DC/DC controller IC with a built-in bootstrap driver circuit. Output will be stable no matter which load capacitors, including low ESR capacitors, are used.
Resistance (RSENSE) of about several 10mΩ will be required as a current sense. The phase compensation is also run when a low ESR capacitor is used. In addition, the circuit is double protected by the ways of limiting the current while detecting overshoot current and making output shutdown at any given timing by a protection time setting capacitor (CPRO).
The output voltage can be set freely within a range of 1.5V~15.0V with 1.0V (accuracy± 2%) of internal reference voltage by using externally connected resistors (RFB1, 2). Synchronous rectification PWM control can be switched to non-synchronous current limit PFM/PWM automatic switchable control (=voltage between RSENSE pins) by using the MODE pin.
The series has a built-in voltage detector for monitoring a selected voltage by external resistors.
During stand-by (CE pin = low) all circuits are shutdown to reduce current consumption to as low as 4.0μ A or less.

APPLICATIONS
● PDAs
● Mobile phones
● Note book computers
● Portable audio systems
● Various multi-function power supplies