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TOREX

XC9140A Datasheet Preview

XC9140A Datasheet

Step-UpSynchronous PFM DC/DC Converter

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XC9140 Series
ETR04015-007a
Step-Up Synchronous PFM DC/DC Converter
GENERAL DESCRIPTION
Green Operation 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, startup from an input voltage of VIN = 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.
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 1.65V, 2.15V 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
Output Capacitor
Operating Ambient Temperature
Packages
Environmentally Friendly
: operating hold voltage 0.7V ~ 5.5V
Start-up voltage
0.9V ~ 5.5V
: 1.8V ~ 5.0V (±2.0%) 0.1V increments
: 100mAVOUT=3.3V, VBAT=1.8V (TYP.)
: 0.6Ω Nch driver transistor
0.65Ω Pch synchronous rectifier switch transistor
: 6.3μA (VBAT=VOUT+0.5V)
: PFM Control
: 50mV@VOUT=3.3V, VBAT=1.8V, IOUT=1→50mA
: 350mA
: Load Disconnection (A,B Type)
Bypass Mode (C Type)
CL discharge (B Type), UVLO
Ceramic Capacitor
: -40~ 85
: SOT-25, USP-6EL
: EU RoHS Compliant, Pb Free
TYPICAL APPLICATION CIRCUIT
L=4.7μH
LX
CE
VIN=0.95.5V
CINC=I1N=04μ.7μFF
VBAT
VOUT
GND
CL=10μF
TYPICAL PERFORMANCE
CHARACTERISTICS
Efficiency vs. Output Current
XC9140A331MR-G(VOUT=3.3V)
L=4.7μH(VLF302512M-4R7M),CIN=4.7μF(LMK107BJ475MA),
CL=10μF(LMK107BJ106MA)
100
2.5V
80
3.0V
VBAT=1.8V
60
40
20
0
0.01
0.1
1
10
100
Output Current : IOUT (mA)
1000
1/32




TOREX

XC9140A Datasheet Preview

XC9140A Datasheet

Step-UpSynchronous PFM DC/DC Converter

No Preview Available !

XC9140 Series
BLOCK DIAGRAM
XC9140Axx1/XC9140Cxx1 Type
PFM
CFB RFB1
RFB2
PFM
Comparator
FB -
+
VREF
CE
CE and Bypass
Controller Logic
Current Sense
PFM Controller
LX
Buffer
Driver
and
Inrush
Currrent
Protection
Parasitic Diode
Controller
VOUT
VOUT
VDD
VOUT
VBATVOUT Detector
GND
VBAT
* Diodes inside the circuit are an ESD protection diodes and a parasitic diodes.
XC9140Bxx1 Type
PFM
CFB RFB1
RFB2
PFM
Comparator
FB -
+
VREF
Current Sense
PFM Controller
CE
CE and Bypass
Controller Logic
LX
Buffer
Driver
and
Inrush
Currrent
Protection
Parasitic Diode
Controller
VOUT
CL
Auto
Discharge
VDD
VOUT
VBATVOUT Detector
VOUT
GND
VBAT
* Diodes inside the circuit are an ESD protection diodes and a parasitic diodes.
2/32


Part Number XC9140A
Description Step-UpSynchronous PFM DC/DC Converter
Maker TOREX
PDF Download

XC9140A Datasheet PDF






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