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參數(shù)資料
| 型號： | XC9237B3CDEL |
| 廠商： | TOREX SEMICONDUCTOR LTD. |
| 英文描述： | 600mA Driver Tr. Built-In, Synchronous Step-Down DC/DC Converters |
| 中文描述： | 600mA的驅(qū)動程序圖。內(nèi)置的同步降壓DC / DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 1/28頁 |
| 文件大?。?/td> | 774K |
| 代理商： | XC9237B3CDEL |
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XC9235/XC9236/XC9237
Series
1/28
600mA Driver Tr. Built-In, Synchronous Step-Down DC/DC Converters
GreenOperation Compatible
APPLICATIONS
Mobile phones
Bluetooth equipment
PDAs, portable communication modem
Portable games
Digital cameras, video cameras
Cordless phones
Notebook computers
TYPICAL APPLICATION CIRCUIT
ETR0514-007
GENERAL DESCRIPTION
The XC9235/XC9236/XC9237 series is a group of synchronous-rectification type DC/DC converters with a built-in 0.42
P-channel driver transistor and 0.52
N-channel switching transistor, designed to allow the use of ceramic capacitors. The ICs
enable a high efficiency, stable power supply with an output current of 600mA to be configured using only a coil and 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 50mV (accuracy:
2.0%). With the built-in oscillator, ether 1.2MHz or 3.0MHz can be selected
for suiting to your particular application. As for operation mode, the XC9235 series is PWM control, the XC9236 series is
automatic PWM/PFM switching control and the XC9237 series can be manually switched between the PWM control mode and
the automatic PWM/PFM switching control mode, allowing fast response, low ripple and high efficiency over the full range of
loads (from light load to heavy load).
The soft start and current control functions are internally optimized. During stand-by, all circuits are shutdown to reduce
current consumption to as low as 1.0
A or less. With the built-in UVLO (Under Voltage Lock Out) function, the internal
P-channel driver transistor is forced OFF when input voltage becomes 1.4V or lower.
The XC9235B/XC9236B/XC9237B series provide short-time turn-on by the soft start function internally set in 0.25 ms (TYP).
The XC9235B(C)/XC9236B(C)/XC9237B(C) integrate C
L
auto discharge function which enables the electric charge at the output
capacitor C
L
to be discharged via the internal auto-discharge switch located between the L
X
and V
SS
pins. When the devices
enter stand-by mode, output voltage quickly returns to the V
SS
level as a result of this function.
Two types of package SOT-25 and USP-6C are available.
FEATURES
P-ch Driver Transistor Built-In : ON resistance 0.42
N-ch Driver Transistor Built-In : ON resistance 0.52
Input Voltage
Output Voltage
High Efficiency
Output Current
Oscillation Frequency
Maximum Duty Cycle
Control Methods
Soft-Start Circuit Built-In
Current Limiter Circuit Built-In (Constant Current & Latching)
Low ESR Ceramic Capacitor Compatible
Packages : SOT-25, USP-6C
C
L
High Speed Discharge
XC9235B(C)/XC9236B(C)/XC9237B(C) Series
: 2.0V ~ 6.0V
: 0.8V ~ 4.0V
: 92% (TYP.)
: 600mA
: 1.2MHz, 3.0MHz (+15%)
: 100%
: PWM (XC9235)
PWM/PFM Auto (XC9236)
PWM/PFM Manual (XC9237)
High Speed Soft Start
XC9235B/XC9236B/XC9237B Series
* Performance depends on external components and wiring on the PCB.
TYPICAL PERFORMANCE
CHARACTERISTICS
Efficiency vs. Output Current
100
FOSC=1.2NHz, V
OUT
=1.8V
0
10
20
30
40
50
60
70
80
90
0.1
1
10
100
1000
Output Current:IOUT(mA)
E
PWM/PFM Automatic Switching Control
PWM Control
VIN= 4.2V
3.6V
2.4V
VIN= 4.2V
3.6V
2.4V
E
相關(guān)PDF資料 |
PDF描述 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XC9237B3CDER | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:600mA Driver Tr. Built-In, Synchronous Step-Down DC/DC Converters |
| XC9237B3CDML | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:600mA Driver Tr. Built-In, Synchronous Step-Down DC/DC Converters |
| XC9237B3CDMR | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:600mA Driver Tr. Built-In, Synchronous Step-Down DC/DC Converters |
| XC9237C08C4R-G | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:600mA Driver Tr. Built-In, Synchronous Step-Down DC/DC Converters |
| XC9237C08CER | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:600mA Driver Tr. Built-In, Synchronous Step-Down DC/DC Converters |
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