XC9140
Series
Step-Up Synchronous PFM DC/DC Converter
ETR04015-003
■
GENERAL DESCRIPTION
☆
GreenOperation Compatible
The XC9140 series are step-up synchronous DC/DC converters that support ceramic capacitors and have an internal 0.6Ω
(TYP.) Nch driver transistor and an internal 0.65Ω (TYP.) Pch synchronous rectifier switch transistor. PFM control enables a low
quiescent current, making these products ideal for portable devices that require high efficiency.
When the output voltage is 3.3V and the load current is 1mA (XC9140Axx1 type and XC9140Cxx1 type), startup from an input
voltage of V
IN
= 0.9V is possible which means that these products can be used in applications that start using a single alkaline or
nickel-metal hydride battery. The output voltage can be set from 1.8V to 5.0V (±2.0%) in steps of 0.1V.
The XC9140 features a load disconnect function to break continuity between the input and output at shutdown (XC9140A), and
also a bypass mode function to maintain continuity between the input and output (XC9140C).
A version with a UVLO (Under Voltage Lock-out) function is also available. This function enables the prevention of battery leakage
by stopping IC’s operation when the input voltage is low. The standard product has a UVLO release voltage of 2.15V (±3.0%), and a
custom version with a release voltage selectable from between 1.65V to 2.2V, in steps of 0.05V, is also available.
■APPLICATIONS
●
●
●
●
●
●
Mouses, Keyboards
Bluetooths
Household use Medical equipments
Remote controls
Game consoles
Devices with 1~3 Alkaline, 1~3 Nickel Hydride,
1 Lithium and 1 Li-ion
■FEATURES
Input Voltage Range
Output Voltage Setting
Output Current
Driver Transistor
Supply Current
Control Method
High speed transient response
PFM Switching Current
Functions
:
:
:
:
:
:
:
:
:
0.9V~5.5V
1.8V~5.0V (±2.0%) 0.1V increments
100mA＠V
OUT
=3.3V, V
BAT
=1.8V (TYP.)
0.6Ω Nch driver transistor
0.65Ω Pch synchronous rectifier switch transistor
6.3μA (V
BAT
=V
OUT
+0.5V)
PFM Control
50mV@V
OUT
=3.3V, V
BAT
=1.8V, I
OUT
=1→50mA
350mA
Load Disconnection Function or
Bypass Mode Function
UVLO Function
Ceramic Capacitor
Operating Ambient Temperature
Packages
Environmentally Friendly
:
:
:
-40℃½+85℃
SOT-25, USP-6EL
EU RoHS Compliant, Pb Free
■TYPICAL
APPLICATION CIRCUIT
■TYPICAL
PERFORMANCE
CHARACTERISTICS
●Efficiency
vs. Output Current
XC9140A331MR-G(V
OUT
=3.3V)
L=4.7μH(VLF302512M-4R7M),C
IN
=4.7μF(LMK107BJ475MA),
C
L
=10μF(LMK107BJ106MA)
2.5V
Efficiency : EFFI (%)
100
L=4.7μH
LX
VOUT
C
L
=10μF
CE
80
60
3.0V
V
BAT
=1.8V
40
V
IN
=0.9½5.5V
=4.7μF
IN
IN
C
C
=10μF
VBAT
GND
20
0
0.01
0.1
1
10
100
1000
Output Current : I
OUT
(mA)
1/28
XC9140
Series
■
BLOCK DIAGRAM
* Diodes inside the circuits are ESD protection diodes and parasitic diodes.
The XC9140A /XC9140C series do not have the C
L
discharge function.
The XC9140Axx1/XC9140Cxx1 series do not have the UVLO function.
■
PRODUCT CLASSIFICATION
●Ordering
Information
XC9140①②③④⑤⑥-⑦
DESIGNATOR
①
②③
④
(*1)
ITEM
Product Type
Output Voltage
UVLO Function
SYMBOL
A
C
18½50
1
2
4R-G
MR-G
DESCRIPTION
Load Disconnection Without C
L
Auto Discharge
V
BAT
Bypass Without C
L
Auto Discharge
Output Voltage
e.g. V
OUT
=3.3V⇒②=3,
③=3
No UVLO
UVLO Function V
UVLO_R
=2.15V
USP-6EL (3,000/Reel)
SOT-25 (3,000/Reel)
(*2)
(*3)
⑤⑥-⑦
(*1)
(*2)
(*3)
(*4)
(*4)
Packages (Order Unit)
The product with the C
L
discharge function is a semi-custom product.
V
OUT
=3.3V is standard.
The standard product has a UVLO release voltage of 2.15V. For other voltages, consult our sales department.
The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant.
2/28
XC9140
(Design Target)
■PIN
CONFIGURATION
L
X
V
OUT
XC9140
Series
5
4
1
CE
2
GND
3
V
BAT
SOT-25
(TOP VIEW)
* The dissipation pad for the USP-6EL package should be solder-plated in
recommended mount pattern and metal masking so as to enhance mounting
strength and heat release.
The mount pattern should be connected to GND pin (No.6).
■
PIN ASSIGNMENT
PIN NUMBER
USP-6EL
1
2
3
4
5
6
SOT-25
5
4
3
1
-
2
PIN NAME
L
X
V
OUT
V
BAT
CE
NC
GND
FUNCTIONS
Switching
Output Voltage
Power Input
Chip Enable
No Connection
Ground
■
CE PIN FUNCTION
PIN NAME
CE
SIGNAL
H
L
STATUS
Active (All Series)
Stand-by (XC9140A Series) or Bypass Mode (XC9140C Series)
* Please do not leave the CE pin open.
■ABSOLUTE
MAXIMUM RATINGS
PARAMETER
BAT Pin Voltage
L
X
Pin Voltage
V
OUT
Pin Voltage
CE Pin Voltage
L
X
Pin Current
Power Dissipation
SOT-25
USP-6EL
Operating Ambient Temperature
Storage Temperature
SYMBOL
V
BAT
V
LX
V
OUT
V
CE
I
LX
Pd
Topr
Tstg
RATINGS
-0.3 ~ +7.0
-0.3 ~ V
OUT
+0.3 or +7.0
(*1)
-0.3 ~ +7.0
-0.3 ~ +7.0
700
250
120
-40 ~ +85
-55 ~ +125
Ta=25˚C
UNITS
V
V
V
V
mA
mW
˚C
˚C
* All voltages are described based on the GND.
(*1)
The maximum value should be either V
OUT
+0.3 or +7.0 or in the lowest.
3/28
XC9140
Series
■
ELECTRICAL CHARACTERISTICS
●XC9140Axx1
Type, without UVLO function, without C
L
discharge function
PARAMETER
Input Voltage
Output Voltage
Operation Start Voltage
Operation Hold Voltage
Supply Current
Input Pin Current
Stand-by Current
L
X
Leak Current
PFM Switching Current
Maximum ON Time
Efficiency
Efficiency
Efficiency
(*3)
Ta=25˚C
TYP.
-
E1
-
-
-
0.7
E2
-
-
-
295
0.25
0.1
0.1
350
4.6
81
85
86
E3
-
0.6
-
1.0
1.0
1.0
405
6.0
-
-
-
0.9
-
MAX.
5.5
UNITS
V
V
V
V
μA
μA
μA
μA
mA
μs
%
%
%
Ω
Ω
CIRCUIT
-
①
②
②
③
③
④
⑤
②
①
②
②
②
⑦
⑧
SYMBOL
V
BAT
V
OUT(E)
V
ST1
V
HLD
Iq
I
BAT
I
STB
I
LXL
I
PFM
t
ONMAX
EFFI
EFFI
EFFI
R
LXP
R
LXN
(*2)
CONDITIONS
-
V
PULL
=1.5V, Voltage to start oscillation
while V
OUT
is decreasing
I
OUT
=1mA
R
L
=1kΩ
Oscillation stops,
V
OUT
=V
OUT(T)
+0.5V
V
OUT
=V
OUT(T)
+0.5V
V
BAT
=V
LX
=V
OUT(T)
V
BAT
=V
LX
=V
OUT(T)
I
OUT
=3mA
V
PULL
=1.5V, V
OUT
=V
OUT(
Ｔ
)
×0.98V
V
BAT
=V
CE
=1.8V, V
OUT(T)
I
OUT
=30mA
V
BAT
=V
CE
=1.8V, V
OUT(T)
I
OUT
=30mA
V
BAT
=V
CE
=1.8V, V
OUT(T)
I
OUT
=30mA
V
BAT
=V
LX
=V
CE
=V
OUT(T)
+0.5V
I
OUT
=200mA
V
BAT
=V
CE
=3.3V, V
OUT
=1.7V
V
BAT
=V
PULL
=1.5V,
(*1)
(*1)
(*1)
(*1)
(*1)
(*1)
(*1)
MIN.
-
(*1)
(*1)
, V
OUT
=V
CE
=0V
, V
OUT
=V
CE
=0V
3.1
-
-
-
=2.5V,
=3.3V,
=5.0V,
,
(*3)
(*3)
LX SW “Pch” ON
Resistance
Resistance
(*4)
LX SW “Nch” ON
(*5)
CE “High” Voltage
V
CEH
V
OUT
=V
OUT(
Ｔ
)
×0.98V
(*1)
While V
CE
=0.3→0.75V,
Voltage to start oscillation
V
BAT
=V
PULL
=1.5V,
V
OUT
=V
OUT(
Ｔ
)
×0.98V
(*1)
0.75
-
5.5
V
①
CE “Low” Voltage
V
CEL
While V
CE
=0.75→0.3V,
Voltage to stop oscillation
V
BAT
=V
CE
=V
LX
=V
OUT
=5.5V
V
BAT
=V
LX
=V
OUT
=5.5V, V
CE
=0V
GND
-
0.3
V
①
CE “High” Current
CE “Low” Current
(*1)
(*2)
I
CEH
I
CEL
-0.1
-0.1
-
-
0.1
0.1
μA
μA
①
①
Unless otherwise stated, V
BAT
=V
CE
=1.5V
V
OUT(T)
=Nominal Output Voltage
V
OUT(E)
=Effective Output Voltage
The actual output voltage value V
OUT(E)
is the PFM comparator threshold voltage in the IC.
Therefore, the DC/DC circuit output voltage, including the peripheral components, is boosted by the ripple voltage average value.
Please refer to the characteristic example.
(*3)
(*4)
(*5)
EFFI=[{ (Output Voltage)×(Output Current)] / [(Input Voltage)×(Input Current)}]×100
LX SW “Pch” ON resistance=(V
LX
-V
OUT
pin measurement voltage) / 200mA
The LX SW “Nch” ON resistance measurement method is shown in the measurement circuit diagram.
4/28
XC9140
(Design Target)
■ELECTRICAL
CHARACTERISTICS (Continued)
●XC9140Cxx1
Type, without UVLO function, without C
L
discharge function
PARAMETER
Input Voltage
Output Voltage
Operation Start Voltage
Operation Hold Voltage
Supply Current
Input Pin Current
Bypass Mode Current
PFM Switching Current
Maximum ON Time
Efficiency
Efficiency
Efficiency
(*3)
XC9140
Series
Ta=25˚C
MIN.
-
TYP.
-
E1
-
-
-
0.7
E2
-
-
295
0.25
3.5
350
4.6
81
85
86
E3
-
0.6
-
1.0
6.1
405
6.0
-
-
-
0.9
-
MAX.
5.5
UNITS
V
V
V
V
μA
μA
μA
mA
μs
%
%
%
Ω
Ω
CIRCUIT
-
①
②
②
③
③
⑥
②
①
②
②
②
⑦
⑧
SYMBOL
V
BAT
V
OUT(E)
V
ST1
V
HLD
Iq
I
BAT
I
BYP
I
PFM
t
ONMAX
EFFI
EFFI
EFFI
R
LXP
R
LXN
(*2)
CONDITIONS
V
PULL
=1.5V, Voltage to start oscillation
while V
OUT
is decreasing
I
OUT
=1mA
R
L
=1kΩ
Oscillation stops,
V
OUT
=V
OUT(T)
+0.5V
V
OUT
=V
OUT(T)
+0.5V
(*1)
(*1)
V
BAT
=V
LX
=5.5V, V
CE
=0V
I
OUT
=3mA
V
PULL
=1.5V, V
OUT
=V
OUT(
Ｔ
)
×0.98V
V
BAT
=V
CE
=1.8V, V
OUT(T)
I
OUT
=30mA
V
BAT
=V
CE
=1.8V, V
OUT(T)
I
OUT
=30mA
V
BAT
=V
CE
=1.8V, V
OUT(T)
I
OUT
=30mA
V
BAT
=V
LX
=V
CE
= V
OUT(T)
+0.5V
I
OUT
=200mA
V
BAT
=V
CE
=3.3V, V
OUT
=1.7V
V
BAT
=V
PULL
=1.5V,
(*1)
(*1)
(*1)
(*1)
(*1)
3.1
-
-
-
=2.5V,
=3.3V,
=5.0V,
,
(*3)
(*3)
LX SW “Pch” ON
Resistance
Resistance
(*4)
LX SW “Nch” ON
(*5)
CE “High” Voltage
V
CEH
V
OUT
=V
OUT(
Ｔ
)
×0.98V
(*1)
While V
CE
=0.3→0.75V,
Voltage to start oscillation
V
BAT
=V
PULL
=1.5V,
V
OUT
=V
OUT(
Ｔ
)
×0.98V
(*1)
0.75
-
5.5
V
①
CE “Low” Voltage
V
CEL
While V
CE
=0.75→0.3V,
Voltage to stop oscillation
V
BAT
=V
CE
=V
LX
=V
OUT
=5.5V
V
BAT
=V
LX
=V
OUT
=5.5V, V
CE
=0V
GND
-
0.3
V
①
CE “High” Current
CE “Low” Current
(*1)
(*2)
I
CEH
I
CEL
-0.1
-0.1
-
-
0.1
0.1
μA
μA
①
①
Unless otherwise stated, V
BAT
=V
CE
=1.5V
V
OUT(T)
=Nominal Output Voltage
V
OUT(E)
=Effective Output Voltage
The actual output voltage value V
OUT(E)
is the PFM comparator threshold voltage in the IC.
Therefore, the DC/DC circuit output voltage, including the peripheral components, is boosted by the ripple voltage average value.
Please refer to the characteristic example.
(*3)
(*4)
(*5)
EFFI={[(Output Voltage)×(Output Current)] / [(Input Voltage)×(Input Current)]}×100
LX SW “Pch” ON resistance=(V
LX
-V
OUT
pin measurement voltage) / 200mA
The LX SW “Nch” ON resistance measurement method is shown in the measurement circuit diagram.
5/28
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
