Series
PFM Controlled, Step-Up DC/DC Converters (Variable Duty Ratio)
NVariable
Duty Ratio
NOperating
Voltage
NOutput
Voltage Range
: 55% / 75%
: 0.9V~10.0V
: 2.0V~7.0V
■Applications
GCellular
phones, pagers
GPalmtops
GCameras,
video recorders
GPortable
equipment
NCMOS
Low Power Consumption
NOutput
Voltage Accuracy : ±2.5%
4
■General Description
The XC6383 series is a group of PFM controlled step-up DC/DC
converters. Unlike conventional PFMs, the XC6383 automatically
switches duty ratio (55% / 75%) when it senses changes in load and can
support both large and small currents.
The XC6383 series employs CMOS process and laser trimming
technologies so as to attain low power and high accuracy.
Maximum oscillator frequency is trimmed to 100kHz (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.
Both built-in and external transistor types include 5-pin and 3-pin
packages, which are provided with either a CE (chip enable) function that
reduces power comsumption during shut-down mode, or a V
DD
pin
function (separated power and voltage detect pins).
SOT-23, SOT-25, and SOT-89-5 ultra mini-mold packages.
■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%
Maximum oscillator frequency
: 100kHz (±15%)
Variable Duty Ratio
: 55% / 75% (±5%)
Both switching transistor built-in and external types are
available
Five-lead packaged units offer either Chip Enable or
independent V
OUT
pin option.
Small package
: SOT-23, 25 mini-mold (3-pin, 5-pin)
SOT-89, 89-5 mini-power mold
(3-pin, 5-pin)
■Typical Application Circuit
L
2
1
■Typical Performance
Characteristic
XC6383A301
L=100μH,C=47μF（Tantalum）
V
IN
C
IN
(TOP VIEW)
SOT-23
100
Efficiency:EFFI（％）
3
V
OUT
SD
C
L
（Tantalum）
80
60
0.9V
40
20
0
1.2V
1.5V
V
IN
=2.0V
1.8V
GND
0
20
40
60
80
100
Output Current:I
OUT
（mA）
505
XC6383
Series
■Pin Configuration
5
3
5
4
4
1
2
1
2
3
1
2
3
1
2
3
SOT-23
(TOP VIEW)
SOT-25
(TOP VIEW)
SOT-89
(TOP VIEW)
SOT-89-5
(TOP VIEW)
■Pin Assignment
4
(XC6383A, XC6383B)
PIN NUMBER
XC6383A
SOT-23
1
3
2
–
SOT-89
1
2
3
–
XC6383B
SOT-23
1
3
–
2
SOT-89
1
2
–
3
V
SS
V
OUT
Lx
EXT
Ground
Output voltage monitor, IC internal power supply
Switch
External switch transistor drive
PIN NAME
FUNCTION
(XC6383C, XC6383D)
PIN NUMBER
XC6383C
SOT-25
4
2
5
–
1
3
SOT-89-5
5
2
4
–
3
1
XC6383D
SOT-25
4
2
–
5
1
3
SOT-89-5
5
2
–
4
3
1
V
SS
V
OUT
Lx
EXT
CE
NC
Ground
Output voltage monitor, IC internal power supply
Switch
External switch transistor drive
Chip enable
No Connection
PIN NAME
FUNCTION
(XC6383E, XC6383F)
PIN NUMBER
XC6383E
SOT-25
4
2
5
–
1
3
SOT-89-5
5
2
4
–
3
1
XC6383F
SOT-25
4
2
–
5
1
3
SOT-89-5
5
2
–
4
3
1
V
SS
V
DD
Lx
EXT
V
OUT
NC
Ground
IC internal power supply
Switch
External switch transistor drive
Output voltage monitor
No Connection
PIN NAME
FUNCTION
506
XC6383
Series
■Product Classification
GSelection
Guide
PART TYPE
XC6383A
DUTY
RATIO
Switchable
PACKAGE
SOT-23,
SOT-89
SOT-23,
SOT-89
SOT-25,
SOT-89-5
SOT-25,
SOT-89-5
SOT-25,
SOT-89-5
SOT-25,
SOT-89-5
SWITCHING
RELATED
Built-in Transistor
"Lx" lead
External Transistor
"EXT" lead
Built-in Transistor
"Lx" lead
External Transistor
"EXT" lead
Built-in Transistor
"Lx" lead
External Transistor
"EXT" lead
ADDITIONAL
FUNCTION
–
FEATURES
•
Automatic duty ratio switch.
•
Low ripple and highly efficient
from low current
to high current.
–
•
Automatic duty ratio switch.
•
Adding an external transistor
XC6383B
Switchable
can improve the output
capability by up to several hundred mA.
XC6383C
Switchable
Chip Enable(CE)
(CE) function added version to the
XC6383A.
•
Stand-by current: 0.5µA max.
•
Stand-by
•
Stand-by
XC6383D
Switchable
Chip Enable(CE)
(CE) function added version to the
XC6383B.
•
Stand-by current: 0.5µA max.
XC6383E
Switchable
•
Independent power supply and set-up voltage
Separated
"V
DD
" and "V
OUT
" leads sensing leads allow designing of PFM controllers.
•
Independent power supply and set-up voltage
Separated
"V
DD
" and "V
OUT
" leads sensing leads allow designing of PFM controllers.
4
XC6383F
Switchable
GOrdering
Information
XC6383qwerty
XC6383 series
A
B
q
C
D
E
F
w
e
r
1
M
t
P
y
R
L
Package
PFM Controlled
2 Step
3-pin. Built-in switching transistor
3-pin. External switching transistor
Stand-by capability. (5-pin) Built-in switching transistor
Stand-by capability. (5-pin) External switching transistor
Separated V
DD
and V
OUT
. (5-pin) Built-in switching transistor
Separated V
DD
and V
OUT
. (5-pin) External switching transistor
Output Voltage
e.g.V
OUT
=3.5V
➔
w=3 e=5
Maximum Oscillator Frequency
Package
q=A~B
q=C~F
q=A~B
q=C~F
100kHz
SOT-23
SOT-25
SOT-89
SOT-89-5
Embossed tape: Standard Feed
Embossed tape: Reverse Feed
507
MCU
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