DataSheet8.cn


PDF ( 数据手册 , 数据表 ) XCL201

零件编号 XCL201
描述 Inductor Built-in Step-Down micro DC/DC Converters
制造商 Torex Semiconductor
LOGO Torex Semiconductor LOGO 


1 Page

No Preview Available !

XCL201 数据手册, 描述, 功能
XCL201/XCL202 Series
Inductor Built-in Step-Down “micro DC/DC” Converters
ETR2802-003
GreenOperation Compatible
GENERAL DESCRIPTION
The XCL201/XCL201 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC
in one tiny package (2.5mm×2.0mm, h=1.0mm). A stable power supply with an output current of 400mA is configured using
only two capacitors connected externally.
Operating voltage range is from 2.0V to 6.0V. Output voltage is internally set in a range from 0.8V to 4.0V in increments of
0.05V. The device is operated by 1.2MHz, and includes 0.42P-channel driver transistor and 0.52N-channel switching
transistor. As for operation mode, the XCL201 series is PWM control, the XCL202 series is automatic PWM/PFM switching
control, allowing fast response, low ripple and high efficiency over the full range of loads (from light load to heavy load).
During stand-by, the device is shutdown to reduce current consumption to as low as 1.0μA or less. With the built-in UVLO
(Under Voltage Lock Out) function, the internal driver transistor is forced OFF when input voltage becomes 1.4V or lower. The
series provide short-time turn-on by the soft start function internally set in 0.25ms (TYP). The series integrate CL auto
discharge function which enables the electric charge stored at the output capacitor CL to be discharged via the internal
auto-discharge switch located between the LX and VSS pins. When the devices enter stand-by mode, output voltage quickly
returns to the VSS level as a result of this function.
APPLICATIONS
Mobile phones, Smart phones
Bluetooth Headsets
WiMAX PDAs, MIDs, UMPCs
Portable game consoles
Digital cameras, Camcorders
SSD(Solid State Drive)
PND(Portable Navigation Device)
FEATURES
Ultra Small
: 2.5mm 2.0mm, h=1.0mm
Input Voltage
: 2.0V ~ 6.0V
Output Voltage
: 0.8V ~ 4.0V (±2.0%)
High Efficiency
Output Current
: 92%(VIN=4.2V,VOUT=3.3V)
: 400mA
Oscillation Frequency
: 1.2MHz (±15%)
Maximum Duty Cycle
: 100%
Output Capacitor
: Low ESR Ceramic
Current Limiter Circuit
: Constant Current & Latching
Control Methods
: PWM (XCL201)
PWM/PFM Auto (XCL202)
CE Function
: Soft-Start Circuit Built-In
Operating Ambient Temperature : -40 +85
Environmentally Friendly
: EU RoHS Compliant, Pb Free
TYPICAL APPLICATION CIRCUIT
XCL201/XCL202 Series
CL
10 F
400mA
L1
LX VIN
Vss Vss
VOUT
L2
CE
CIN
4.7 F
(TOP VIEW)
* “L1 and LX”, and “L2 and VOUT” is connected by wiring.
TYPICAL PERFORMANCE
CHARACTERISTICS
XCL201B331BR/XCL202B331BR
100
XCL202(PWM/PFM)
80
60
VIN= 5.5V
40
5.0V
XCL201(PWM)
20
4.2V
0
0.01
0.1
1
VOUT=3.3V
10 100 1000
Output Current:IOUT (mA)
1/21







XCL201 pdf, 数据表
XCL201/XCL202 Series
OPERATIONAL DESCRIPTION (Continued)
<Current Limit>
The current limiter circuit of the XCL201/XCL202 series monitors the current flowing through the P-channel MOS driver transistor connected to
the Lx pin, and features a combination of the current limit mode and the operation suspension mode.
When the driver current is greater than a specific level, the current limit function operates to turn off the pulses from the Lx pin at any given timing.
When the driver transistor is turned off, the limiter circuit is then released from the current limit detection state.
At the next pulse, the driver transistor is turned on. However, the transistor is immediately turned off in the case of an over current state.
When the over current state is eliminated, the IC resumes its normal operation.
The IC waits for the over current state to end by repeating the steps through . If an over current state continues for a few milliseconds and
the above three steps are repeatedly performed, the IC performs the function of latching the OFF state of the driver transistor, and goes into
operation suspension state. Once the IC is in suspension state, operations can be resumed by either turning the IC off via the CE pin, or by
restoring power to the VIN pin. The suspension state does not mean a complete shutdown, but a state in which pulse output is suspended;
therefore, the internal circuitry remains in operation. The current limit of the XCL201/XCL202 series can be set at 800mA at typical.
Depending on the state of the PC Board, latch time may become longer and latch operation may not work. In order to avoid the effect of noise,
an input capacitor is placed as close to the IC as possible.
Limit < # ms
Limit > # ms
Current Limit LEVEL
ILx 0mA
VOUT
Vss
Lx
VCE Restart
VIN
<Short-Circuit Protection>
The short-circuit protection circuit monitors the internal R1 and R2 divider voltage from the VOUT pin (refer to FB point in the block diagram
shown in the previous page). In case where output is accidentally shorted to the Ground and when the FB point voltage decreases less
than half of the reference voltage (Vref) and a current more than the ILIM flows to the driver transistor, the short-circuit protection quickly
operates to turn off and to latch the driver transistor. In the latch state, the operation can be resumed by either turning the IC off and on via
the CE pin, or by restoring power supply to the VIN pin.
When sharp load transient happens, a voltage drop at the VOUT is propagated to the FB point through CFB, as a result, short circuit protection
may operate in the voltage higher than 1/2 VOUT voltage.
<UVLO Circuit>
When the VIN pin voltage becomes 1.4V or lower, the P-channel output driver transistor is forced OFF to prevent false pulse output caused by
unstable operation of the internal circuitry. When the VIN pin voltage becomes 1.8V or higher, switching operation takes place. By releasing
the UVLO function, the IC performs the soft start function to initiate output startup operation. The soft start function operates even when the VIN
pin voltage falls momentarily below the UVLO operating voltage. The UVLO circuit does not cause a complete shutdown of the IC, but causes
pulse output to be suspended; therefore, the internal circuitry remains in operation.
8/21







XCL201 equivalent, schematic
XCL201/XCL202 Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(7) UVLO Voltage vs. Ambient Temperature
XCL201B181BR/XCL202B181BR
1.8
CE=VIN
1.5
1.2
0.9
0.6
0.3
0.0
-50 -25 0 25 50 75
100
(8) CE "H" Voltage vs. Ambient Temperature
XCL201B181BR/XCL202B181BR
1.0
0.9
0.8 VIN=5.0V
0.7 3.6V
0.6
0.5
0.4
0.3
2.4V
0.2
0.1
0.0
-50
-25
0
25 50 75
Ambient Temperature: Ta ()
Ambient Temperature: Ta ()
100
(9) CE "L" Voltage vs. Ambient Temperature
XCL201B181BR/XCL202B181BR
1.0
0.9
0.8
0.7 VIN=5.0V
0.6 3.6V
0.5
0.4
0.3
2.4V
0.2
0.1
0.0
-50 -25 0 25 50 75
Ambient Temperature: Ta ()
100
(10) "Pch / Nch" Driver on Resistance vs. Input Voltage
1.0 XCL201B181BR/XCL202B181BR
0.9
0.8
0.7 Nch on Resistance
0.6
0.5
0.4
0.3
0.2 Pch on Resistance
0.1
0.0
01 234 56
Input Voltage : VIN (V)
(11) Rise Wave Form
XCL201B331BR/XCL202B331BR
16/21
Time:100μs/div










页数 21 页
下载[ XCL201.PDF 数据手册 ]


分享链接

Link :

推荐数据表

零件编号描述制造商
XCL201Inductor Built-in Step-Down micro DC/DC ConvertersTorex Semiconductor
Torex Semiconductor
XCL202Inductor Built-in Step-Down micro DC/DC ConvertersTorex Semiconductor
Torex Semiconductor
XCL205Inductor Built-in Step-Down micro DC/DC ConvertersTorex Semiconductor
Torex Semiconductor
XCL206Inductor Built-in Step-Down micro DC/DC ConvertersTorex Semiconductor
Torex Semiconductor

零件编号描述制造商
STK15C88256-Kbit (32 K x 8) PowerStore nvSRAMCypress Semiconductor
Cypress Semiconductor
NJM4556DUAL HIGH CURRENT OPERATIONAL AMPLIFIERNew Japan Radio
New Japan Radio
EL1118-G5 PIN LONG CREEPAGE SOP PHOTOTRANSISTOR PHOTOCOUPLEREverlight
Everlight


DataSheet8.cn    |   2020   |  联系我们   |   搜索  |  Simemap