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XCL231 Datasheet Preview

XCL231 Datasheet

Step-down micro DC/DC Converter

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XCL230/XCL231 Series
36V, 600mA Inductor Built-in Step-down “micro DC/DC” Converter
ETR28019-001a
GENERAL DESCRIPTION
The XCL230/XCL231 Series is a small (3.0mm×3.0mm, h=1.7mm) 36V, 600mA step-down DC/DC converter with an integrated
control IC and coil. Integrating the coil makes for easier circuit board layout and minimizes malfunction and noise from the
component and wiring layout.
The input voltage range is 3.0 to 36V, the switching frequency is 1.2MHz, and a synchronous rectification circuit is used to achieve
a stable power supply at high efficiency. The XCL230 Series fixes the operation frequency using PWM control to suppress output
ripple voltage.
The XCL231 Series automatically switches between PWM and PFM control to reduce loss by lowering the operation frequency
during low loads to achieve high efficiency across the entire range from low to high loads.
A 0.75V standard voltage supply is built in, and the output voltage can be set to 1.0V to 5.0V using an external resistance.
The soft start time is internally set to 2.0ms, and a time that is longer than the internal soft-start can be freely set depending on the
resistance and capacity connected to the EN/SS pin.
An overcurrent protection function and thermal shutdown function are built in as protective functions to ensure safe use in the
event of a short circuit.
APPLICATIONS
Electricity Meters
Gas Detectors
Various Sensors
Industrial Equipment
Home Appliances
FEATURES
Input Voltage Range
Output Voltage Range
FB Voltage
Output Current
Oscillation Frequency
Efficiency
Control Methods
Function
Protection Circuits
Output Capacitor
Operating Ambient Temperature
Packages
Environmentally Friendly
: 3.0V ~ 36V (Absolute Max 40V)
: 1.0V ~ 5.0V
: 0.75V ± 1.5%
: 600mA
: 1.2MHz
: 86%(VIN=12V,VOUT=5V, IOUT=300mA)
: PWM control (XCL230)
: PWM/PFM Auto (XCL231)
: Soft-start External settings
Power good
Over Current Protection
:
(Automatic recovery)
Thermal Shutdown
: Ceramic Capacitor
: -40~ 105
: DFN3030-10B
: EU RoHS Compliant, Pb Free
TYPICAL APPLICATION CIRCUIT
VEN/SS
VIN
CIN1
CIN2
Lx
EN/SS
L1
PG
L2
VIN
FB
GND
RPG
PG
VOUT
CFB
RFB1 CL
RFB2
TYPICAL PERFORMANCE
CHARACTERISTICS
XCL230/XCL231
VIN=VEN/SS=12V, VOUT=5.0V
CIN1=4.7μF(UMK212BBJ475KG), CIN2=0.1μF(UMK107BJ104MAHT)
CL=22μF(TMK212BBJ226MG)
100
90
80
70
60
50
40
30
20
10
0
0.1
XCL230
XCL231
1
10
100
Output current : IOUT [mA]
1000
1/37




Torex

XCL231 Datasheet Preview

XCL231 Datasheet

Step-down micro DC/DC Converter

No Preview Available !

XCL230/XCL231 Series
BLOCK DIAGRAM
L2
VIN
Inducto r
Local
Reg
Under
Voltage
Lock O ut
Thermal
Shu tdo wn
Each
Circuit
Ope ration
Ena ble
Curren t
SENSE
Each
Circuit
Gate
CLAMP
L1
EN/SS
CE
Controller
Log ic
FB
PG
Vre f
Soft Start
Curren t
Feed
Back
Curren t
Limit
Curren t
Limit
PFM
Error
Amp.
PWM
Comparator
PWM/PFM
Controller
Log ic
Ramp Wave
Gen erator
Oscillator
High
Side
Buffer
Low
Side
Buffer
Power-Good
Comparator
Lx
GND
* "PWM/PFM Controller Logic" in the XCL230 series is fixed to PWM control.
"PWM/PFM Controller Logic" In the XCL231 series is fixed to PWM/PFM automatic switching control.
Diodes inside the circuit are an ESD protection diode and a parasitic diode.
2/37



Part Number XCL231
Description Step-down micro DC/DC Converter
Maker Torex
Total Page 3 Pages
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XCL231 Datasheet PDF





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