TOREX XC6366C

XC6365/XC6366 Series
ETR0501_002
PWM Controlled, PWM/PFM Switchable Step-Down DC/DC Converters
☆GO-Compatible
■GENERAL DESCRIPTION
The XC6365/XC6366 series are multi-functional step-down DC/DC converters with built-in high speed, low ON resistance
drivers. An output current of more than 1A is possible using an externally connected transistor, coil, diode and capacitor.
Output voltage is programmable in 100mV increments between 1.5V to 6.0V (VOUT) (±2.5% accuracy). Further, with 1.0V of
standard voltage supply internal and using externally connected components, output voltage can be set up freely (FB). With
a 300kHz switching frequency, the size of the external components can be reduced.
Control switches from PWM to PFM during light loads with the XC6366 (PWM/PFM switchable) and the series is highly
efficient from light loads to large output currents.
In relation to soft-start time, both internally set-up 10msec types (A, B) and external resistor or capacitor regulated types (C,
D) are available.
During stand-by time (CE pin "Low" ), current consumption is reduced to less than 0.5μA.
With U.V.L.O. internal, the external transistor will be forcibly switched off if used below the stipulated voltage.
■APPLICATIONS
■FEATURES
●Electronic information organizers
Input Voltage Range : 2.2V ~ 10V (VOUT type)
●Palmtops
●Cellular and portable phones
Output Voltage Range : 1.5V ~ 6.0V programmable in
100mV increments (±2.5%)
Oscillation Frequency : 300kHz (±15%)
●Portable audio systems
●Various multi-function power supplies
: Custom products for 180, 500kHz
Output Current
: More than 1.0A
High Efficiency
: 92% (TYP.)
(VIN=5.0V, VOUT=3.0V)
Stand-by Capability : ISTB=0.5μA (MAX.)
Soft-start time set-up externally type possible
Internally set-up output voltage type possible (VOUT)
Externally set-up output voltage type possible (FB)
Maximum Duty Ratio : 100%
PWM/PFM Switching Control (XC6366)
Package
■TYPICAL APPLICATION CIRCUIT
: SOT-25
■TYPICAL PERFORMANCE
CHARACTERISTICS
1/23
XC6365/XC6366 Series
■PIN CONFIGURATION
■PIN ASSIGNMENT
PIN NUMBER
PIN NAME
FUNCTION
1
2
3
EXT/
VDD
GND
4
CE
5
VOUT (FB)
External Transistor Connection
Power Supply
Ground
Chip Enable Soft-Start Capacitor Connection
with Soft-Start Externally Set-Up Types (C, D)
Output Voltage Monitor FB with Externally
Set-Up Types (B, D)
■PRODUCT CLASSIFICATION
●Selection Guide
2/23
XC6365/XC6366
Series
■PRODUCT CLASSIFICATION (Continued)
●Ordering Information
XC6365①②③④⑤⑥
XC6366①②③④⑤⑥
DESIGNATOR
①
② ③
④
PWM control
PWM/PFM switching control
DESCRIPTION
Type of DC/DC Converter
Output Voltage
Oscillation Frequency
⑤
Package
⑥
Device Orientation
SYMBOL
DESCRIPTION
A
: VOUT type: Internally set-up, soft-start internally set-up
B
: FB type: Externally set-up, soft-start internally set-up
C
: VOUT type: Internally set-up, soft-start externally set-up
D
: FB type: Externally set-up, soft-start internally set-up
15∼60
: VOUT type: 3.0V output → ②=3, ③=0
10
: FB type: 10 fixed → ②=1, ③=0 fixed
3
: 300kHz
5
: 500kHz (custom)
2
: 180kHz (custom)
M
: SOT-25 (SOT-23-5)
R
: Embossed tape, standard feed
L
: Embossed tape, reverse feed
3/23
XC6365/XC6366 Series
■BLOCK DIAGRAMS
XC6365, XC6366 Series A, C type (VOUT)
XC6365, XC6366 Series B, D type (FB)
4/23
XC6365/XC6366
Series
■ABSOLUTE MAXIMUM RATINGS
Ta = 25℃
PARAMETER
VIN Pin Voltage
VOUT Pin Voltage
FB Pin Voltage
CE Pin Voltage
EXT/ Pin Voltage
EXT/ Pin Current
Power Dissipation
Operating Temperature Range
Storage Temperature Range
SYMBOL
VDD
VOUT
VFB
VCE
VEXT/
RATINGS
-0.3 ~ +12
-0.3 ~ VIN +0.3
-0.3 ~ VIN +0.3
-0.3 ~ VIN +0.3
-0.3 ~ VIN +0.3
±100
150
-30 ~ +80
-40 ~ +125
IEXT/
Pd
Topr
Tstg
UNITS
V
V
V
V
V
mA
mW
℃
℃
Note: Voltage is all ground standardized.
■ELECTRICAL CHARACTERISTICS
XC6365A333MR, XC6366A333MR
PARAMETER
SYMBOL
Output Voltage
VOUT
Maximum Input Voltage
VIN
U.V.L.O. Voltage
VUVLO
(Minimum Operating Voltage)
Supply Current 1
IDD1
Supply Current 2
IDD2
Stand-by Current
ISTB
Oscillation Frequency
FOSC
Maximum Duty Ratio
PFM Duty Ratio
MAXDTY
PFMDTY
CE "High" Voltage
VCEH
CE "Low" Voltage
VCEL
EXT "High" ON Resistance
EXT "Low" ON Resistance
REXTBH
REXTBL
Efficiency
EFFI
Soft-Start Time
TSS
(VOUT=3.3V,
Ta=25℃
FOSC=300kHz)
CONDITIONS
Same as IDD1,
Voltage which EXT/pin voltage holding “H” level
No external components, CE=VDD, VOUT=0V
No external components,
XC6365
CE=VOUT=VDD
XC6366
No external components, CE=VOUT=0V
Measuring of EXT/ waveform,
VIN=output voltage + 0.1V
No load (XC6366 only)
No external components, VOUT=0V,
Voltage which EXT/pin voltage holding “L” level
No external components, VOUT=0V,
Voltage which EXT/pin voltage holding “H” level
Same as IDD2, VEXT/=VDD-0.4V
Same as IDD1, VEXT/=0.4V
Use of a XP162A12A6 transistor
recommended
Connect RSS, CSS, CE, 0V→ 3.0V
(When VIN≦3.0V, VIN=3.0V)
MIN.
3.218
10.0
TYP.
3.300
-
MAX. UNITS
3.383
V
V
0.9
-
2.2
V
-
57
57
15
-
102
102
27
0.5
μA
μA
μA
μA
255
300
345
kHz
100
15
25
35
%
%
0.65
-
-
V
-
-
0.20
V
-
16
14
22
19
μA
μA
-
92
-
%
5
10
20
ms
Conditions: 1. Unless otherwise stated, connect external components. VIN=VDD = 5.0V, IOUT = 220mA
2. XC6365/66C series external components: CSS=0.033μF, RSS=470kΩ
5/23
XC6365/XC6366 Series
■ELECTRICAL CHARACTERISTICS (Continued)
XC6365A503MR, XC6366A503MR
PARAMETER
SYMBOL
Output Voltage
VOUT
Maximum Input Voltage
VIN
U.V.L.O. Voltage
VUVLO
(Minimum Operating Voltage)
Supply Current 1
IDD1
Supply Current 2
IDD2
Stand-by Current
ISTB
Oscillation Frequency
FOSC
Maximum Duty Ratio
PFM Duty Ratio
MAXDTY
PFMDTY
CE "High" Voltage
VCEH
CE "Low" Voltage
VCEL
EXT "High" ON Resistance
EXT "Low" ON Resistance
REXTBH
REXTBL
Efficiency
EFFI
Soft-Start Time
TSS
Conditions:
(VOUT=5.0V, FOSC=300kHz)
CONDITIONS
Same as IDD1,
Voltage which EXT/pin voltage holding “H” level
No external components, CE=VDD, VOUT=0V
No external components,
XC6365
CE=VOUT=VDD
XC6366
No external components, CE=VOUT=0V
Measuring of EXT/ waveform,
VIN=output voltage + 0.1V
No load (XC6366 only)
No external components, VOUT=0V,
Voltage which EXT/pin voltage holding “L” level
No external components, VOUT=0V,
Voltage which EXT/pin voltage holding “H” level
Same as IDD2, VEXT/=VIN-0.4V
Same as IDD1, VEXT/=0.4V
Use of a XP162A12A6
transistor recommended
Connect RSS, CSS, CE, 0V→ 3.0V
(When VIN≦3.0V, VIN=3.0V)
1. Unless otherwise stated, connect external components. VIN=VDD = 7.5V, IOUT = 330mA
2. XC6365/66C series external components: CSS=0.033μF, RSS=470kΩ
6/23
Ta=25℃
MIN.
4.875
10.0
TYP.
5.000
-
MAX. UNITS
5.125
V
V
0.9
-
2.2
V
-
67
67
16
-
122
122
29
0.5
μA
μA
μA
μA
255
300
345
kHz
100
15
25
35
%
%
0.65
-
-
V
-
-
0.20
V
-
12
10
17
14
μA
μA
-
93
-
%
5
10
20
ms
XC6365/XC6366
Series
■ELECTRICAL CHARACTERISTICS (Continued)
XC6365B103MR, XC6366B103MR
PARAMETER
SYMBOL
Output Voltage
VOUT
Maximum Input Voltage
VIN
U.V.L.O. Voltage
VUVLO
(Minimum Operating Voltage)
Supply Current 1
IDD1
Supply Current 2
IDD2
Stand-by Current
ISTB
Oscillation Frequency
FOSC
Maximum Duty Ratio
PFM Duty Ratio
MAXDTY
PFMDTY
CE "High" Voltage
VCEH
CE "Low" Voltage
VCEL
EXT "High" ON Resistance
EXT "Low" ON Resistance
REXTBH
REXTBL
Efficiency
EFFI
Soft-Start Time
TSS
(VOUT=3.0V, FOSC=300kHz)
CONDITIONS
Same as IDD1,
Voltage which EXT/pin voltage holding “H” level
No external components, CE=VIN, VOUT=0V
No external components,
XC6365
CE=VDD, FB=1.2V
XC6366
No external components, CE=FB=0V
Measuring of EXT/ waveform,
VIN=output voltage + 0.1V
No load (XC6366 only)
No external components, FB=0V,
Voltage which EXT/pin voltage holding “L” level
No external components, VOUT=0V,
Voltage which EXT/pin voltage holding “H” level
Same as IDD2, VEXT/=VIN-0.4V
Same as IDD1, VEXT/=0.4V
Use of a XP162A12A6
transistor recommended
Connect RSS, CSS, CE, 0V→ 3.0V
(When VIN≦3.0V, VIN=3.0V)
Conditions: 1. Unless otherwise stated, connect external components.
Ta=25℃
MIN.
2.975
10.0
TYP.
3.000
-
MAX. UNITS
3.075
V
V
0.9
-
2.2
V
-
55
55
15
-
100
100
27
0.5
μA
μA
μA
μA
255
300
345
kHz
100
15
25
35
%
%
0.65
-
-
V
-
-
0.20
V
-
17
15
24
20
μA
μA
-
92
-
%
5
10
20
ms
VIN=VDD = 4.5V, IOUT = 200mA
2. XC6365/66C series external components: CSS=0.033μF, RSS=470kΩ
3. RFB1 = 400kΩ, RFB2 = 200kΩ, CFB = 100ppF
7/23
XC6365/XC6366 Series
■TEST CIRCUITS
Circuit 1. XC6365A, XC6366A
Circuit 2. XC6365B, XC6366B
Circuit 3. XC6365C, XC6366C
8/23
XC6365/XC6366
Series
■TEST CIRCUITS (Continued)
Circuit 4. XC6365D, XC6366D
Circuit 5. XC6365A, XC6366A (when used with a PNP transistor)
Circuit 6. XC6365B, XC6366B (when used with a PNP transistor)
9/23
XC6365/XC6366 Series
■TEST CIRCUITS (Continued)
Circuit 7. XC6365C, XC6366C (when used with a PNP transistor)
Circuit 8. XC6365D, XC6366D (when used with a PNP transistor)
Recommended Components
Tr : XP162A12A6PR (Torex P-channel Power MOSFET)
Please use a PNP transistor where VIN < 2.5V
L
: 22μH (CR54, SUMIDA, FOSC=300kHz)
47μH (CR75, SUMIDA, FOSC=180kHz)
10μH (CR54, SUMIDA, FOSC=500kHz)
SD : MA2Q735 (Schottky Diode, MATSUSHITA)
CL :10V, 47μF (Tantalum capacitor, NICHICHEMl MCE)
CIN :16V 10μF (Tantalum capacitor, NICHICHEMI MCE)
PNP Tr. Type
Tr : 2SA1213 (TOSHIBA)
RB : 500Ω(Adjust according to load and Tr. hFE levels)
CB : 2200pF (Ceramic Type)
Set up so that CB≦1 / (2π x RB x FOSC x 0.7)
10/23
C, D type (soft-start externally set-up)
CSS : 0.033μF (Ceramic Capacitor)
RSS : 470kΩ(C type), 330kΩ(D type)
B, D type (FB type)
RFB : Set up so that RFB1 / RFB2 = VOUT – 1
(VOUT = setting output voltage),
RFB1 = RFB2 ≦ 2MΩ
CFB : Set up so that fzfb = 1÷(2π x CFB x RFB1) is within
the 0.5 to 20kHz range (10kHz conventional)
Adjustments necessary in respect of L, CL.
e.g. : VOUT = 3.0V
RFB1 = 400kΩ, RFB2 = 200kΩ, CFB = 100pF
XC6365/XC6366
Series
■NOTES ON USE
1. Take ample care to ensure that none of the IC's, nor the external component's, absolute maximum ratings are exceeded.
2. Be extremely careful when selecting parts and do not limit your reference to the specifications and characteristics for the
DC/DC converter alone. The IC also depends, to a great extent, upon the external components.
3. Arrange the peripherals in the environs of the IC. In order to reduce wiring impedance, use short, thick wires. In particular,
wire the load capacitor as close as possible and strengthen the ground wiring sufficiently.
4. Ground current during switching may cause the IC's operations to become unstable due to changes in ground voltage, so
please strengthen the IC's GND pin surroundings.
●External Components
1. Setting soft start time
To set a longer soft start time, please use XC6365C or XC6365D series which soft start function is externally set up.
For the measurement of soft start time TSS, the time is needed to be between the maximum and the minimum value indicated
in the chart below. Please set a soft start capacitor CSS according to the application.
2. Setting RFB1 and CFB
fzfb=1 ÷ (2 π × CFB × RFB1)
As the combination of RFB1 and CFB enable to set fzfb between 0.5kHz to 20kHz, within the realm of fzfb=0.5kHz to
fzfb=20kHz as the chart below can be effective.
Under normal condition, please set the combination to configure around fzfb=10kHz.
11/23
XC6365/XC6366 Series
■TYPICAL PERFORMANCE CHARACTERISTICS
12/23
XC6365/XC6366
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(Continued)
13/23
XC6365/XC6366 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
14/23
XC6365/XC6366
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(Continued)
15/23
XC6365/XC6366 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
16/23
XC6365/XC6366
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(Continued)
17/23
XC6365/XC6366 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
18/23
XC6365/XC6366
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
19/23
XC6365/XC6366 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
20/23
XC6365/XC6366
Series
■PACKAGING INFORMATION
●SOT-25
21/23
XC6365/XC6366 Series
■MARKING RULE
①Represents product classification
5
①
1
4
②
③ ④
2
3
SOT-25
(TOP VIEW)
MARK
PRODUCT SERIES
MARK
PRODUCT SERIES
A
B
C
D
XC6365A
XC6365B
XC6365C
XC6365D
K
L
M
N
XC6366A
XC6366B
XC6366C
XC6366D
②Represents integer of output voltage and oscillation frequency
OUTPUT VOLTAGE
1.x
2.x
3.x
4.x
5.x
6.x
100
B
C
D
E
F
H
OSCILLATION FREQUENCY (kHz)
180
300
1
2
3
4
5
6
1
2
3
4
5
6
500
B
C
D
E
F
H
③Represents decimal number of output voltage and oscillation frequency
OUTPUT VOLTAGE
100
OSCILLATION FREQUENCY (kHz)
180
300
0
1
2
3
4
5
0
1
2
3
4
5
A
B
C
D
E
F
A
B
C
D
E
F
x.6
x.7
x.8
x.9
6
7
8
9
6
7
8
9
H
K
L
M
H
K
L
M
④Represents production lot number
0 to 9, A to Z repeated (G, I, J, O, Q, W excepted)
22/23
500
x.0
x.1
x.2
x.3
x.4
x.5
XC6365/XC6366
Series
1. The products and product specifications contained herein are subject to change without
notice to improve performance characteristics.
Consult us, or our representatives
before use, to confirm that the information in this catalog is up to date.
2. We assume no responsibility for any infringement of patents, patent rights, or other
rights arising from the use of any information and circuitry in this catalog.
3. Please ensure suitable shipping controls (including fail-safe designs and aging
protection) are in force for equipment employing products listed in this catalog.
4. The products in this catalog are not developed, designed, or approved for use with such
equipment whose failure of malfunction can be reasonably expected to directly
endanger the life of, or cause significant injury to, the user.
(e.g. Atomic energy; aerospace; transport; combustion and associated safety
equipment thereof.)
5. Please use the products listed in this catalog within the specified ranges.
Should you wish to use the products under conditions exceeding the specifications,
please consult us or our representatives.
6. We assume no responsibility for damage or loss due to abnormal use.
7. All rights reserved. No part of this catalog may be copied or reproduced without the
prior permission of Torex Semiconductor Ltd.
23/23