XC6367/XC6368
Series
PWM Controlled, PWM/PFM Switchable Step-up DC/DC Controllers
ETR0401_004a
☆GreenOperation-Compatible
■GENERAL
DESCRIPTION
The XC6367/XC6368 series are multi-functional step-up DC/DC controllers which provide high efficiency outputs by using an
externally connected transistor, coil, diode and capacitor.
Output voltage is selectable in 0.1V increments within a range of 1.5V ~ 6.5V (±2.5%). For output voltages outside this
range, we recommend FB version, which has a 1.0V internal reference voltage. Using the FB version, the required output
voltage can be set-up using 2 external resistors.
With a 300kHz oscillation frequency, the size of the external components can be reduced.
Control switches from PWM to PFM during light loads with the XC6368 (PWM/PFM switchable) and the series is highly
efficient from light loads to large output currents.
Soft start time of XC6367/ XC6368A, B, and E series is internally set to 10ms and XC6367/68C, D, and F series regulate
soft-start time by connecting resistors and capacitors externally.
During stand-by (CE pin "Low"), supply current is reduced to less than 0.5μA.
■APPLICATIONS
●Electronic
information organizers
●Palmtops
●Cellular
and portable phones
●Portable
audio systems
●Various
multi-function power supplies
■FEATURES
Input Voltage Range
: 0.9V ~ 10V
Operating Voltage Range
: 2.0V ~ 10V
Output voltage Range
: 1.5V ~ 6.5V (0.1V increments) (±2.5%)
Oscillation Frequency
Output Current
High Efficiency
Stand-by capability
Selection
: 300kHz, 100kHz (±15%)
Custom products for 180kHz, 500kHz
: More than 200mA (V
IN
=1.8V, V
OUT
=3.3V)
: 84% (TYP.)
: I
STB
=0.5μA (MAX.)
: Soft-start set-up external
Output voltage set-up internal (V
OUT
)
Output voltage set-up external (FB)
PWM/PFM Control (XC6368)
Package
: SOT-25
Environmentally Friendly
: EU RoHS Compliant, Pb Free
■TYPICAL
APPLICATION CIRCUIT
■
TYPICAL PERFORMANCE
CHARACTERISTICS
1/28
XC6367/XC6368
Series
■PIN
CONFIGURATION
（
）
■PIN
ASSIGNMENT
PIN NUMBER
XC6367/XC6368
A, B, C, D
5
2
4
3
E, F
5
-
4
1
EXT
V
DD
GND
CE
: External Transistor Connection
: Supply Voltage Input
: Ground
: Chip Enable
(C, D, F Types: Soft Start External Set-Up,
Soft Start Capacitor Connected)
: Output Voltage Monitor
(E, F Types: Output Voltage Monitor, Power Supply)
(B, D Types: Output Voltage External Set-up)
PIN NAME
FUNCTION
1
2
V
OUT
(FB)
■PRODUCT
CLASSIFICATION
●Selection
Guide
START
Soft-Start Internally Set-Up
Output Voltage Internally Set-Up
(V
OUT
)
V
OUT
=V
DD
pin
XC6367A,XC6368A
XC6367E,XC6368E
XC6367B,XC6368B
Output Voltage Externally Set-Up (FB)
Soft-Start Externally Set-Up
Output Voltage Internally Set-Up
(V
OUT
)
V
OUT
=V
DD
pin
XC6367C,XC6368C
XC6367F,XC6368F
XC6367D,XC6368D
Output Voltage Externally Set-Up
(FB)
2/28
XC6367/XC6368
Series
■PRODUCT
CLASSIFICATION (Continued)
●Ordering
Information
XC6367①②③④⑤⑥-⑦
(
*1
)
PWM Control
XC6368①②③④⑤⑥-⑦
(
*1
)
PWM/PFM Switching Control
DESIGNATOR
ITEM
SYMBOL
A
B
①
Type of DC/DC Converter
C
D
E
F
15 ~ 65
②③
Output Voltage
10
3
④
Oscillation Frequency
1
2
5
⑤⑥-⑦
(*1)
DESCRIPTION
V
OUT
type: V
OUT
internally set-up, Soft-start internally set-up
FB type: V
OUT
externally set-up, Soft-start internally set-up
V
OUT
type: V
OUT
internally set-up, Soft-start externally set-up
FB type: V
OUT
externally set-up, Soft-start externally set-up
V
OUT
type: V
OUT
internally set-up, Soft-start internally set-up
V
OUT
type: V
OUT
internally set-up, Soft-start externally set-up
V
OUT
type: 3.0V output
→ ②=3, ③=0
FB type (B, D types): 10 fixed
→ ②=1, ③=0
fixed
300kHz
100kHz
180kHz (Custom)
500kHz (Custom)
SOT-25 (3,000/Reel)
SOT-25 (3,000/Reel)
Package
(Order Unit)
MR
MR-G
The “-G” suffix indicates that the products are Halogen and Antimony free as well as being fully RoHS compliant.
3/28
XC6367/XC6368
Series
■BLOCK
DIAGRAMS
XC6367, XC6368 Series A, C, E, F types (V
OUT
)
V
OUT
Phase
Compensation
Error Amp.
+
-
-
PWM
Comparator
+
Buffer,
Driver
V
DD
EXT
CE
Vref with
Soft Start,
CE
PWM/PFM
Controller
Ramp Wave
Generator,
OSC
GND
* V
OUT
and V
DD
of the E and F types should be connected internally.
XC6367, XC6368 Series B,D types (FB)
Phase
Compensation
Error Amp.
FB
+
-
-
PWM
Comparator
+
Buffer,
Driver
V
DD
EXT
CE
Vref with
Soft Start,
CE
PWM/PFM
Controller
Ramp Wave
Generator,
OSC
GND
4/28
XC6367/XC6368
Series
■ABSOLUTE
MAXIMUM RATINGS
PARAMETER
V
DD
Pin Voltage
V
OUT
Pin Voltage
FB Pin Voltage
CE Pin Voltage
EXT Pin Voltage
EXT Pin Current
Power Dissipation
Operating Temperature Range
Storage Temperature Range
*Voltage is all ground standardized.
SYMBOL
V
DD
V
OUT
V
FB
V
CE
V
EXT
I
EXT
Pd
Topr
Tstg
RATINGS
-0.3 ~ +12.0
-0.3 ~ +12.0
-0.3 ~ +12.0
-0.3 ~ +12.0
-0.3 ~ V
DD
+0.3
±100
150
-30 ~ +80
-40 ~ +125
Ta = 25℃
UNITS
V
V
V
V
V
mA
mW
℃
℃
■ELECTRICAL
CHARACTERISTICS
XC6367A333MR, XC6368A333MR
PARAMETER
Output Voltage
Supply Voltage (* 1)
Maximum Input Voltage
Oscillation Start Voltage 1
Oscillation Start Voltage 2
Oscillation Hold Voltage
Supply Current 1
Supply Current 2
Stand-by Current
Oscillator Frequency
Maximum Duty Ratio
PFM Duty Ratio (* 3)
CE "High" Voltage
CE "Low" Voltage
EXT "High" ON Resistance
EXT "Low" ON Resistance
Efficiency (* 2)
Soft-Start Time
SYMBOL
V
OUT
V
DD
V
IN
V
ST1
V
ST2
V
HLD
I
DD1
I
DD2
I
STB
FOSC
MAXDTY
PFMDTY
V
CEH
V
CEL
R
EXTH
R
EXTL
EFFI
T
SS
CONDITIONS
V
OUT
=3.3V, FOSC=300kHz, Ta=25℃
MIN.
3.218
2.0
10.0
-
-
-
-
-
-
255
78
15
0.65
-
-
-
-
5
TYP.
3.300
-
-
-
-
-
130
20
-
300
85
25
-
-
29
19
84
10
MAX.
3.383
10.0
-
0.9
0.8
0.7
200
35
0.5
345
92
35
-
0.20
43
27
-
20
UNITS
V
V
V
V
V
V
μA
μA
μA
kHz
%
%
V
V
Ω
Ω
%
msec
Tr: 2SD1628, I
OUT
=1.0mA
V
OUT
=CE: Apply voltage
Tr: Use of a 2SX1628, I
OUT
=1.0mA
V
OUT
=CE=setting output voltage x 0.95
V
OUT
=CE=setting output voltage + 0.5V
V
OUT
=setting output voltage x 0.95, CE=0V
Same as I
DD1
Same as I
DD1
I
OUT
=0mA
V
OUT
=setting output voltage x0.95
V
OUT
=setting output voltage x0.95
Same as I
DD1
, VEXT=V
OUT
-0.4V
Same as I
DD1
, V
EXT
=0.4V
Conditions: Unless otherwise stated, connect V
DD
to V
OUT
; V
IN
=setting output voltage x 0.6, I
OUT
=130mA
NOTE:
* 1: When taking V
DD
from another power source please ensure that V
DD
= 2.0V or more.
Oscillation will occur with a value of V
DD
= 0.8V or more, but with a value of V
DD
= 2.0V or more,
output voltage and oscillation frequency will be stable.
* 2: EFFI = {[(output voltage) x (output current)]÷[(input voltage) x (input current)] x 100
* 3: Applies to the XC6368 series only (duty ratio when control changes to PFM).
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