Series
Dual Mode [PWM/PFM] 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
equipment
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
=3.0V,
V
OUT
=5.0V.....Note(1)
Both switching transistor built-in and external Tr types are
available.
Five-lead packaged units offer either Chip Enable or
independent V
OUT
pin option.
Phase compensation and soft startup circuits included.
Small package
: SOT-89 mini-power mold (3-pin, 5-pin)
Note(1): Performance depends on external components and
PCB layout.
■General Description
The XC6372 series, unlike the conventional PWM controlled converters,
are a group of step-up DC/DC converters that automatically change their
operation modes into PFM modes while loads are light, such as when
the duty ratios are less than 10%.
When loads are light, as in the stand-by mode, the XC6372 changes to
PFM control so as to decrease oscillator frequencies, resulting in
reduced supply current.
Therefore, the XC6372 is suitable for use with portable equipment that
requires the PWM controlled performance of low ripple and high output
current, and a supply current that varies between low and high. Built-in
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.
SOT-89 small package.
■Typical Application Circuit
SD
V
OUT
L
■Typical Performance
Characteristic
XC6372A301PR
100
L＝100μH
（CＲ54）C
L
＝47μF
，
（Tantalum）
V
IN
C
IN
SOT-89
(TOP VIEW)
Efficiency:EFFI（％）
2.7V
80
60
40
20
0
0.1
1
10
100
1000
V
IN
=0.9V
1.2V
1.5V
1.8V
C
L
（Tantalum）
3
1
2
GND
Output Voltage:I
OUT
(mA)
451
XC6372
Series
■Pin Configuration
5
4
1
2
3
1
2
3
SOT-89
(TOP VIEW)
SOT-89-5
(TOP VIEW)
■Pin Assignment
4
(XC6372A, C6372B)
PIN NUMBER
PIN NAME
XC6372A
1
2
3
–
XC6372B
1
2
–
3
V
SS
V
OUT
Lx
EXT
Ground
Output voltage monitor / IC internal power supply
Switch
External switch transistor drive
FUNCTION
(XC6372C, C6372D)
PIN NUMBER
PIN NAME
XC6372C
5
2
4
–
3
1
XC6372D
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
FUNCTION
(XC6372E, C6372F)
PIN NUMBER
PIN NAME
XC6372E
5
2
4
–
3
1
XC6372F
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
FUNCTION
452
XC6372
Series
■Product Classification
GSelection
Guide
PART TYPE
OPERATION
MODE
PWM/PFM
PACKAGE
SWITCHING
RELATED
Built-in Transistor
"Lx"lead
External Transistor
"EXT"lead
Built-in Transistor
"Lx"lead
External Transistor
"EXT"lead
ADDITIONAL
FUNCTION
------------
FEATURES
•
Switching transistor incorporated standard
•
PFM operation during light loads.
XC6372A
SOT-89
type.
XC6372B
PWM/PFM
SOT-89
------------
•
External switching transistor standard type.
•
Adding external transistor can improve the
output capability up to several hundred mA.
•
Stand-by
XC6372C
PWM/PFM
SOT-89-5
Chip Enable(CE)
(CE) function added version to the
XC6372A
•
Stand-by current: 0.5µA max.
(CE) function added version to the
XC6372B
•
Stand-by current: 0.5µA max.
•
Individual
•
Stand-by
XC6372D
PWM/PFM
SOT-89-5
Chip Enable(CE)
XC6372E
PWM/PFM
SOT-89-5
Built-in Transistor
Separated
"Lx"lead
"V
DD
"and"V
OUT
"leads
External Transistor
Separated
"EXT"lead
"V
DD
"and"V
OUT
"leads
power supply and set-up voltage
sensing leads are available.
power supply and set-up voltage
sensing leads are available.
4
XC6372F
PWM/PFM
SOT-89-5
•
Individual
GOrdering
Information
XC6372 Series
A
B
C
D
E
F
XC6372qwerty
PWM/PFM Controlled
3-pin. Built-in switching transistor
3-pin. External switching transistor
Stand-by capability. Built-in switching transistor
Stand-by capability. External switching transistor
Separated V
DD
and V
OUT
. Built-in switching transistor
Separated V
DD
and V
OUT
. External switching transistor
Output Voltage
e.g.,V
OUT
=3.5V
➔
w=3, e=5
①
w
e
r
t
y
0
1
2
P
R
L
OSC Frequency 50kHz
OSC Frequency 100kHz
OSC Frequency 180kHz
q=A
~ B
➔
SOT-89
q=C
~ F
➔
SOT-89-5
Embossed tape: Standard Feed
Embossed tape: Reverse Feed
453
XC6372
Series
■Packaging Information
GSOT-89
4.5±0.1
1.6
+0.15
-0.2
1.5±0.1
（0.4）
2.5±0.1
0.8
min
4.25max
4
0.42±0.06
0.47±0.06
1.5±0.1 1.5±0.1
0.42±0.06
0.4
+0.03
-0.02
GSOT-89-5
1.6
-0.2
0.42±0.06
（0.4）
+0.15
1.5±0.1
0.42±0.06
0.8min
2.5±0.1
0.8min
4.5max
0.4
+0.03
-0.02
0.42±0.06
0.42±0.06
0.42±0.06
0.47±0.06
1.5±0.1 1.5±0.1
4.5±0.1
454
XC6372
Series
■Marking
w
q
r
e
2
1
4
3
SOT-89
(TOP VIEW)
SOT-89-5
(TOP VIEW)
q
Represents the Product Classification
PRODUCT NAME
XC6372A
XC6372B
XC6372C
XC6372D
XC6372E
XC6372F
DESIGNATOR
1
2
1
2
3
4
4
180
1
2
3
4
5
6
7
w
Represents the integer of the Output Voltage and Oscillator Frequency
INTEGER OF THE
OUTPUT VOLTAGE
1
2
3
4
5
6
7
OSCILLATOR FREQUENCY（kHz）
50
B
C
D
E
F
H
K
100
1
2
3
4
5
6
7
e
Represents the decimal number of the Output Voltage and Oscillator Frequency
THE DECIMAL NUMBER OF
OUTPUT VOLTAGE
0
1
2
3
4
5
6
7
8
9
OSCILLATOR FREQUENCY（kHz）
50
0
1
2
3
4
5
6
7
8
9
100
0
1
2
3
4
5
6
7
8
9
180
A
B
C
D
E
F
H
K
L
M
r
Denotes the production lot number
0 to 9, A to Z repeated(G.I.J.O.Q.W excepted)
455
