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
XC6371
Series
■Pin Configuration
5
4
1
2
3
1
2
3
SOT-89
(TOP VIEW)
SOT-89-5
(TOP VIEW)
■Pin Assignment
4
(XC6371A,XC6371B)
PIN NUMBER
PIN NAME
XC6371A
1
2
3
–
XC6371B
1
2
–
3
V
SS
V
OUT
Lx
EXT
Ground
Output voltage monitor / IC internal power supply
Switch
External switch transistor drive
FUNCTION
(XC6371C,XC6371D)
PIN NUMBER
PIN NAME
XC6371C
5
2
4
–
3
1
XC6371D
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
(XC6371E,XC6371F)
PIN NUMBER
PIN NAME
XC6371E
5
2
4
–
3
1
XC6371F
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
438
XC6371
Series
■Product Classification
GSelection
Guide
PART TYPE
OPERATION
MODE
PWM
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 type.
•
Low ripple and highly efficient from low current
XC6371A
SOT-89
to high current.
•
External switching transistor standard type.
•
Adding external transistor can improve the
XC6371B
PWM
SOT-89
------------
output capability up to several hundred mA.
•
Stand-by
XC6371C
PWM
SOT-89-5
Chip Enable(CE)
(CE)function added version to the
XC6371A.
•
Stand-by current: 0.5µA max.
(CE)function added version to the
XC6371B.
•
Stand-by current: 0.5µA max.
•
Individual
•
Stand-by
XC6371D
PWM
SOT-89-5
Chip Enable(CE)
XC6371E
PWM
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
XC6371F
PWM
SOT-89-5
•
Individual
GOrdering
Information
XC6371qwerty
XC6371 Series
A
B
C
D
E
F
PWM 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
OSC Frequency 50kHz
OSC Frequency 100kHz
OSC Frequency 180kHz
Package
q=A
~ B
➔
SOT-89
q=C
~ F
➔
SOT-89-5
Embossed tape: Standard Feed
Embossed tape: Reverse Feed
q
w
e
r
t
y
0
1
2
P
R
L
439
XC6371
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
440
XC6371
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
XC6371A
XC6371B
XC6371C
XC6371D
XC6371E
XC6371F
DESIGNATOR
A
B
A
B
S
X
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)
441
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