XC9141/XC9142
Series
Load Disconnection Function, 0.8A Step-up DC/DC Converters
ETR04018-003b
☆Green
Operation-compatible
XC9141/XC9142 series are synchronous step-up DC/DC converters with a 0.3Ω N-channel driver transistor and a 0.3Ω
synchronous P-channel switching transistor built-in. A highly efficient and stable current can be supplied up to 0.8A by reducing
ON resistance of the built-in transistors.
The series are able to start operation under the condition which has 0.9V input voltage to generate 3.3V output voltage with a
100Ω
load resistor, suitable for mobile equipment using only one Alkaline battery or one Nickel metal hydride battery.
The output voltage can be set from 1.8V to 5.5V (±2.0%) in steps of 0.1V. With the built-in oscillator, either 1.2MHz or 3.0MHz can
be selected for suiting to your particular application.
During the devices enter stand-by mode, A, D types prevent the application malfunction by C
L
Discharge Function which can
quickly discharge the electric charge at the output capacitor (C
L
). B, E types is able to drive RTC etc. by Bypass Switch Function
to maintain continuity between the input and output. C, F types is able to connect in parallel with other power supplies by Load
Disconnection Function which breaks continuity between the input and output.
■GENERAL
DESCRIPTION
■APPLICATIONS
●Portable
equipment
●Beauty
& health equipment
●Wearable
devices
●Game
& Hobby
●PC
Peripherals
●Devices
with 1~3 Alkaline,
1~3 Nickel Hydride, 1 Lithium and 1 Li-ion
■FEATURES
Input Voltage Range
Fixed Output Voltage
Oscillation Frequency
Input Current
Output Current
Control Mode Selection
Load Transient Response
Protection Circuits
: 0.65V ~ 6.0V
: 1.8V ~ 5.5V (0.1V increments)
: 1.2MHz, 3.0MHz
: 0.8A
: 500mA @V
OUT
=5.0V, V
BAT
=3.3V
330mA @V
OUT
=3.3V, V
BAT
=1.8V
: PWM (XC9141)
PWM/PFM (XC9142)
: 100mV@V
OUT
=3.3V, V
BAT
=1.8V,
I
OUT
=1mA→200mA
(tr=5μs)
: Over-current limit
Integral latch method (D,E,F type)
Output short-circuit protection (D,E,F type)
: Soft-start
Load Disconnection (A,C,D,F type)
C
L
Auto Discharge (A,D type)
Bypass Switch (B,E type)
: Ceramic Capacitor
: -40℃ ~ 85℃
: SOT-25, USP-6C, WLP-6-01
: EU RoHS Compliant, Pb Free
Functions
Output Capacitor
Operating Ambient Temperature
Package
Environmentally Friendly
■TYPICAL
APPLICATION CIRCUIT
■TYPICAL
PERFORMANCE
CHARACTERISTICS
XC9141A33C / XC9142A33C
L=4.7μH(LQH5BPN4R7NT0L)
C
IN
=10μF(GRM188R60J106M),C
L
=10μF(GRM188R60J106M)
100
90
80
L=4.7μH
Lx
CE
V
B AT
C
IN
=10μF
V
OUT
V
OUT
C
L
=10μF
Efficiency : EFFI [%]
70
60
50
40
30
20
10
0
0.1
V
BAT
=0.9V
V
BAT
=1.2V
V
BAT
=1.8V
V
BAT
=2.5V
solid line : XC9141
dotted line : XC9142
1
10
100
Output Current : I
OUT
[mA]
1000
CE
BAT
GND
1/32
XC9141/XC9142
Series
■BLOCK
DIAGRAM
●A
type
Lx
C
FB
R
FB1
FB
R
FB2
Vref with
Soft Start
Error Amp.
Phase
Compensation
Current sense
PWM
comparator
PWM/PFM
Controller Logic
Buffer
Driver
Load disconnect
Controller
V
OUT
V
OUT
C
L
Discharge
GND
RAMP Wave
Generator
OSC
CE
CE Controller
Logic
V
OUT
V
DD
V
DD
MAX
BAT
* Diodes inside the circuits are ESD protection diodes and parasitic diodes.
* XC9141 series chooses only PWM control.
●B
type
Lx
C
FB
R
FB1
FB
R
FB2
Vref with
Soft Start
Error Amp.
Phase
Compensation
Current sense
PWM
comparator
PWM/PFM
Controller Logic
Buffer
Driver
Load disconnect
Controller
V
OUT
V
OUT
GND
RAMP Wave
Generator
OSC
Bypass SW
BAT
CE
CE Controller
Logic
V
OUT
V
DD
V
DD
MAX
* Diodes inside the circuits are ESD protection diodes and parasitic diodes.
* XC9141 series chooses only PWM control.
●C
type
Lx
C
FB
R
FB1
FB
R
FB2
Vref with
Soft Start
Error Amp.
Phase
Compensation
Current sense
PWM
comparator
PWM/PFM
Controller Logic
Buffer
Driver
Load disconnect
Controller
V
OUT
V
OUT
GND
RAMP Wave
Generator
OSC
CE
CE Controller
Logic
V
OUT
V
DD
V
DD
MAX
BAT
* Diodes inside the circuits are ESD protection diodes and parasitic diodes.
2/32
XC9141/XC9142
Series
■BLOCK
DIAGRAM (Continued)
●D
type
Lx
C
FB
R
FB1
FB
R
FB2
Vref with
Soft Start
Error Amp.
Phase
Compensation
PWM
comparator
Current sense
Short-circuit protection
Latch Timer
PWM/PFM
Controller Logic
Load disconnect
Controller
V
OUT
V
OUT
C
L
Discharge
Buffer
Driver
GND
RAMP Wave
Generator
OSC
CE
CE Controller
Logic
V
OUT
V
DD
V
DD
MAX
BAT
* Diodes inside the circuits are ESD protection diodes and parasitic diodes.
* XC9141 series chooses only PWM control.
●E
type
Lx
C
FB
R
FB1
FB
R
FB2
Vref with
Soft Start
Error Amp.
Phase
Compensation
PWM
comparator
Current sense
Short-circuit protection
Latch Timer
PWM/PFM
Controller Logic
Load disconnect
Controller
V
OUT
V
OUT
Buffer
Driver
GND
RAMP Wave
Generator
OSC
Bypass SW
BAT
CE
CE Controller
Logic
V
OUT
V
DD
V
DD
MAX
* Diodes inside the circuits are ESD protection diodes and parasitic diodes.
* XC9141 series chooses only PWM control.
●F
type
Lx
C
FB
R
FB1
FB
R
FB2
Vref with
Soft Start
Error Amp.
Phase
Compensation
PWM
comparator
Current sense
Short-circuit protection
Latch Timer
PWM/PFM
Controller Logic
Load disconnect
Controller
V
OUT
V
OUT
Buffer
Driver
GND
RAMP Wave
Generator
OSC
CE
CE Controller
Logic
V
OUT
V
DD
V
DD
MAX
BAT
* Diodes inside the circuits are ESD protection diodes and parasitic diodes
3/32
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