Series
PWM Controlled Step‐Up DC/DC Controllers/Converters
NCMOS
Low Power Consumption
NOperating
Voltage
NOutput
Voltage Range
: 0.9V~10.0V
: 2.0V~7.0V
■Applications
GCellular
phones, Pagers
GPalmtops
GCameras,
Video recorders
GPortable
products
NOutput
Voltage Accuracy : ±2.5%
NSelectable
Oscillator Frequency
: 50kHz, 100kHz,
180kHz
4
■Features
Operating (start-up) voltage range
: 0.9V~10V
Output voltage range
: 2.0V~7.0V in 0.1V increments
Highly accurate
: Set-up voltage ±2.5%
Oscillator frequency
: 50kHz, 100kHz, 180khz (±15%)
selectable
Maximum output currents (Tr built-in)
: Typ.100mA @ V
IN
=3.0,
V
OUT
=5.0V .....Note(1)
Highly efficient (Tr built-in)
: Typ.85% @ V
IN
=3.0,
V
OUT
=5.0V .....Note(1)
Built-in switching transistor type and an external Tr type are
available.
Five-lead packaged units offer either Chip Enable or
independent V
OUT
pin option.
Phase compensation and soft start-up circuits built-in Small
package
: SOT-89 mini-power mold (3-pin, 5-pin)
Note(1): Performance depends on external components and
PCB layout.
■General Description
The XC6371 series are a group of PWM controlled step-up DC/DC
converters.
On-chip proprietary phase compensation and soft start-up circuits ensure
excellent transient response and improved performance.
Output voltage can be selected from 2.0V to 7.0V in 0.1V increments
(accuracy: ±2.5%). Oscillator frequency is also selectable from three
frequencies; 50, 100, and 180kHz (accuracy: ±15%).
Every built-in switching transistor type enables a step-up circuit to be
configured using only three external components; a coil, a diode, and a
capacitor.
External transistor versions are available to accommodate high output
current applications.
5-pin packages, which are provided with either a CE (chip enable)
function that reduces power consumption during shut-down mode, or a
V
DD
pin (separated power and voltage detect pins) are available.
SOT-89 small package.
■Typical Application Circuit
SD
V
OUT
L
■Typical Performance
Characteristic
XC6371A301PR
（Tantalum）
L＝100μH
（CR54）C
L
＝47μF
，
100
V
IN
C
IN
SOT-89
(TOP VIEW)
2.7V
Efficiency:EFFI (%)
C
L
（Tantalum）
3
80
60
40
20
0
0.1
1
10
100
1000
V
IN
=0.9V
1.8V
1.2V
1.5V
1
2
GND
Output Voltage:I
OUT
（mA）
437
TOREX [ TOREX SEMICONDUCTOR ]
