General Description
The XC6371/6372/6373 series are a group of PWM controlled and PWM/PFM controlled step-up DC/DC converters. The
built-in 1.4Ω switching transistor type enables a step-up circuit to be configured using only three components, a coil, a diode,
and a capacitor.
Output voltage can be selectable in the range from 2.0V to 7.0V in increments of 100mV (accuracy:±2.5%). Oscillation
frequency is also selectable from 50kHz, 100kHz, and 180kHz (accuracy:±15%) for the XC6371 and the XC6372 series.
Soft-start time is internally set and offers protection against in-rush currents when the power is switched on and prevents
voltage overshoot. 5 pin packages, which are provided with either a CE (chip enable) function that reduces power
consumption during shut-down mode, or a VDD pin (separated power and voltage detect pins) are available.
The XC6371 series is the standard PWM controlled products. The control of the XC6372 series switches from PWM to PFM
control during light loads when automatically switching is selected and the series is highly efficient from light loads to large
output currents. Since the XC6373 series is a low noise, it is suitable for a wireless circuit. Also the series is particularly
suited for use with pager applications because oscillation frequency is set at 30kHz (±20%) so as to attain the lowest
consumption current possible.
Features
- Operation Start Voltage Range : 0.9V~10V
- Output Voltage Range : 2.0V~7.0V in 100mV increments
- Highly Accurate : Setting voltage accuracy±2.5%
- Oscillation Frequency : 50kHz, 100kHz, 180kHz (±15%)
selectable (XC6371/72)
30kHz (XC6373)
- Maximum Output Currents (Tr. built-in): 100mA(TYP.) @ VIN=3.0V, VOUT=5.0V
- Highly Efficient (Tr. built-in): 85%(TYP.) @ VIN=3.0V, VOUT=5.0V
Applications
- Cellular phones, Pagers
- Palmtops
- Cameras, Video recorders
- Portable products
Typical Application Circuit
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