XC6367/XC6368 Series

ETR0401_001

PWM Controlled,PWM/PFM Switchable Step-up DC/DC Controllers

GO-Compatible

GENERAL DESCRIPTION

The XC6367/68 series are multi-functional step-up DC/DC converter controllers with built-in high speed, low ON resistance drivers. High efficiency is possible using an externally connected transistor, coil, diode and capacitor. Output voltage is selectable in 100mV increments within a range of 1.5V ~ 6.5V ( 2.5%). For output voltages outside this range, we recommend FB version, which has a 1.0V internal reference voltage. Using the FB version, the required output voltage can be set-up using 2 external resistors. With a 300kHz oscillation frequency, the size of the external components can be reduced. Control switches from PWM to PFM during light loads with the XC6368 (PWM/PFM switchable) and the series is highly efficient from light loads to large output currents. Soft start time of XC6367/68A, B, and E series is internally set to 10msec and XC6367/68C, D, and F series regulate soft-start time by connecting resistors and capacitors externally. During stand-by (CE pin "Low"), supply current is reduced to less than 0.5 A.

APPLICATIONS

FEATURES

Electronic information organizers

Input Voltage Range : 0.9V ~ 10V

Palmtops

Operating Voltage Range : 2.0V ~ 10V

Cellular and portable phones

Output voltage Range : 1.5V ~ 6.5V programmable in 100mV increments (

Portable audio systems

2.5%)

Various multi-function power supplies

Oscillation Frequency : 300kHz, 100kHz ( 15%) Custom products for 180kHz, 500kHz Output Current : More than 200mA (V
IN =1.8V, V
OUT =3.3V) High Efficiency : 84% (TYP.) Stand-by capability : ISTB=0.5 A (MAX.) Selection : Soft-start set-up external Output voltage set-up internal (V
OUT ) Output voltage set-up external (FB) PWM/PFM Switching control (XC6368) Packa g e : SO T -25

TYPICAL APPLICATION CIRCUIT TYPICAL PERFORMANCE CHARACTERISTICS

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