XC9213 Series

Synchronous Step-Down DC/DC Controller, Input voltage 25V

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 a low ESR capacitor, 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 ~ 15V with 1.0V (±2.0%) of internal reference voltage by using externally connected resistors (RFB1, 2). Synchronous rectification PWM control can be switched to non-synchronous 30mV 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 4.0μA or less.

Typical Application Circuit


Input Voltage Range 4.0~25.0V
Output Voltage Range 1.5V ~ 15V externally set
Reference Voltage1.0V±2%
Oscillation Frequency 300kHz(±15%)
Output Current More than 5A (VIN=5.0V,VOUT=3.3V)
Control PWM/PFM manual-switching control
Current Limit、Protection Current limit operates at voltage sense 170mV
Shutdown time can be adjustable by CPRO.
High Efficiency 93%(TYP.PWM mode),VIN=5.0V,VOUT=3.3V,1A
Detect Voltage Function Detects 0.9V / Open-drain output
Stand-by Current ISTB=4.0μA(MAX.)



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