☆GO-Compatible
◆CMOS
Low Power Consumption
■APPLICATIONS
◆Operating
Voltage
:0.9V~10.0V
●Cellular
phones, Pagers
◆Output
Voltage Range
:2.0V~7.0V
●Palmtops
◆Output
Voltage Accuracy :±2.5%
●Cameras,
Video recorders
◆Oscillation
Frequency
:50kHz, 100kHz,
180kHz(XC6371/72)
●Portable
products
30kHz (XC6373)
■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 V
DD
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.) @ V
IN
=3.0V, V
OUT
=5.0V *
Highly Efficient (Tr. built-in)
: 85%(TYP.) @ V
IN
=3.0V, V
OUT
=5.0V *
Built-in switching transistor type.
Five-lead packaged units offer either chip enable or
independent V
OUT
pin option.
Phase compensation and soft start-up circuits built-in.
Small Packages
:SOT-89, SOT-89-5,USP-6B
*: Performance depends on external components and
PCB layout.
■TYPICAL
APPLICATION CIRCUIT
■TYPICAL
PERFORMANCE
CHARACTERISTICS
XC6371 6372 6373 ETR0402_001.doc
581
XC6371/6372/6373
Series
■PIN
CONFIGURATION
■PIN
ASSIGNMENT
XC6371/72/73A
PIN NUMBER
SOT-89
1
2
3
－
USP-6B
6
1
4
2, 3, 5
PIN NAME
V
SS
V
OUT
Lx
NC
*The dissipation pad for the USP-6B
package should be solder-plated in
recommended mount pattern and metal
masking so as to enhance mounting
strength and heat release. If the pad needs
to be connected to other pins, it should be
connected to the pin No.1.
FUNCTION
Ground
Output Voltage Monitor/IC Internal Power Supply
Switch
No Connection
XC6371/72/73C
PIN NUMBER
SOT-89-5
5
2
4
3
1
USP-6B
6
1
4
3
2, 5
PIN NAME
V
SS
V
OUT
Lx
CE
NC
FUNCTION
Ground
Output Voltage Monitor/IC Internal Power Supply
Switch
Chip Enable
No Connection
XC6371/72/73E
PIN NUMBER
SOT-89-5
5
2
4
3
1
USP-6B
6
1
4
3
2, 5
PIN NAME
V
SS
V
DD
Lx
V
OUT
NC
FUNCTION
Ground
IC Internal Power Supply
Switch
Output Voltage Monitor
No Connection
582
XC6371/6372/6373
Series
■PRODUCT
CLASSIFICATION
●Selection
Guide
START
PWM
Low Frequency PWM
XC6371
XC6373
XC6371/73A
XC6371/73C
XC6371/73E
Standard
Chip Enable
Separated
V
DD
/V
OUT
PWM/PFM
Standard
Chip Enable
Separated
V
DD
/V
OUT
XC6372A
XC6372C
XC6372E
●Ordering
Information
XC6371①②③④⑤⑥ : PWM controlled
XC6372①②③④⑤⑥ : PWM/PFM switching control
DESIGNATOR
①
DESCRIPTION
Type of Regulator
SYMBOL
A
C
E
Integer
0
1
2
P
D
R
L
DESCRIPTION
: 3-pin regulator with built-in switching transistor
: Stand-by capability with built-in switching transistor
: Separated V
DD
and V
OUT
with built-in switching transistor
: e.g. V
OUT
=3.5V→②=3,
: 50kHz
: 100kHz
: 180kHz
: SOT-89 (XC6371/72 A type)
: SOT-89-5 (XC6371/72 C/D type)
: USP-6B
: Embossed tape, standard feed
: Embossed tape, reverse feed
③=5
XC6371 Series
② ③
Output Voltage
④
Oscillation Frequency
⑤
Package
⑥
Device Orientation
XC6373①②③④⑤⑥ : PWM controlled
DESIGNATOR
①
②
③
④
⑤
DESCRIPTION
Type of Regulator
SYMBOL
A
C
E
Integer
0
P
D
R
L
DESCRIPTION
: 3-pin regulator with built-in switching transistor
: Stand-by capability with built-in switching transistor
: Separated V
DD
and V
OUT
with built-in switching transistor
: e.g. V
OUT
=3.5V→②=3,
: 30kHz
: SOT-89 (XC6373 A type)
: SOT-89-5 (XC6373 C/D type)
: USP-6B
: Embossed tape, standard feed
: Embossed tape, reverse feed
③=5
Output Voltage
Oscillation Frequency
Package
⑥
Device Orientation
583
XC6371/6372/6373
Series
■MARKING
RULE
[XC6371/72]
●SOT-89,
SOT-89-5
①
Represents product series
MARK
A
A
S
PRODUCT SERIES
XC6371A
XC6371C
XC6371E
MARK
1
1
3
PRODUCT SERIES
XC6372A
XC6372C
XC6372E
②
①
③
④
②
Represents integer of output voltage and oscillation frequency
OUTPUT VOLTAGE (V)
OSCILLATION FREQUENCY
50kHz
100kHz
180kHz
B
1
1
C
2
2
F
3
3
E
4
4
F
5
5
H
6
6
K
7
7
1
2
SOT-89
(TOP VIEW)
3
1.x
2.x
3.x
4.x
5.x
6.x
7.x
③
Represents decimal number of output voltage and oscillation frequency
OUTPUT VOLTAGE (V)
x.0
x.1
x.2
x.3
x.4
x.5
x.6
x.7
x.8
x.9
OSCILLATION FREQUENCY
50kHz
100kHz
180kHz
0
0
A
1
1
B
2
2
C
3
3
D
4
4
E
5
5
F
6
6
H
7
7
K
8
8
L
9
9
M
SOT-89-5
(TOP VIEW)
④
Represents production lot number
0 to 9, A to Z repeated (G, I, J, O, Q, W excepted).
585
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