XC6365_1 Datasheet, PDF (1/23 Pages) Torex Semiconductor – PWM Controllde, PWM/PFM Switchable Step-Down DC/DC Converers

XC6365/XC6366 Series
ETR0501_002
PWM Controlled, PWM/PFM Switchable Step-Down DC/DC Converters
ˑGO-Compatible
˙GENERAL DESCRIPTION
The XC6365/XC6366 series are multi-functional step-down DC/DC converters with built-in high speed, low ON resistance
drivers. An output current of more than 1A is possible using an externally connected transistor, coil, diode and capacitor.
Output voltage is programmable in 100mV increments between 1.5V to 6.0V (VOUT) (±2.5% accuracy). Further, with 1.0V of
standard voltage supply internal and using externally connected components, output voltage can be set up freely (FB). With
a 300kHz switching frequency, the size of the external components can be reduced.
Control switches from PWM to PFM during light loads with the XC6366 (PWM/PFM switchable) and the series is highly
efficient from light loads to large output currents.
In relation to soft-start time, both internally set-up 10msec types (A, B) and external resistor or capacitor regulated types (C,
D) are available.
During stand-by time (CE pin "Low" ), current consumption is reduced to less than 0.5ЖA.
With U.V.L.O. internal, the external transistor will be forcibly switched off if used below the stipulated voltage.
˙APPLICATIONS
˔Electronic information organizers
˔Palmtops
˔Cellular and portable phones
˔Portable audio systems
˔Various multi-function power supplies
˙FEATURES
Input Voltage Range : 2.2V ~ 10V (VOUT type)
Output Voltage Range : 1.5V ~ 6.0V programmable in
100mV increments (±2.5%)
Oscillation Frequency : 300kHz (±15%)
: Custom products for 180, 500kHz
Output Current
: More than 1.0A
(VIN=5.0V, VOUT=3.0V)
High Efficiency
: 92% (TYP.)
Stand-by Capability : ISTB=0.5ЖA (MAX.)
Soft-start time set-up externally type possible
Internally set-up output voltage type possible (VOUT)
Externally set-up output voltage type possible (FB)
Maximum Duty Ratio : 100%
PWM/PFM Switching Control (XC6366)
Package
: SOT-25
˙TYPICAL APPLICATION CIRCUIT ˙TYPICAL PERFORMANCE
CHARACTERISTICS
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