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XC9235D10CMR

更新时间： 2024-11-02 00:19:39
品牌 Logo 应用领域
特瑞仕 - TOREX /
页数 文件大小 规格书
33页 895K
描述
600mA Driver Tr. Built-In, Synchronous Step-Down DC/DC Converters

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XC9235D10CMR 数据手册

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XC9235/XC9236/XC9237Series  
ETR0514-011a  
600mA Driver Tr. Built-In, Synchronous Step-Down DC/DC Converters  
☆GreenOperation Compatible  
■GENERAL DESCRIPTION  
The XC9235/XC9236/XC9237 series is a group of synchronous-rectification type DC/DC converters with a built-in 0.42Ω  
P-channel MOS driver transistor and 0.52ΩN-channel MOS switching transistor, designed to allow the use of ceramic  
capacitors. Operating voltage range is from 2.0V to 6.0V (A～C types), 1.8V to 6.0V (D～G types). For the D/F types which  
have a reference voltage of 0.8V (accuracy: ±2.0%), the output voltage can be set from 0.9V by using two external resistors.  
The A/B/C/E/G types have a fixed output voltage from 0.8V to 4.0V in increments of 0.05V (accuracy: ±2.0%). The device  
provides a high efficiency, stable power supply with an output current of 600mA to be configured using only a coil and two  
capacitors connected externally.  
With the built-in oscillator, either 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 1.0μA or less. The B/F/G types have a high speed soft-start as fast as 0.25ms in typical for quick  
turn-on. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel MOS driver transistor is forced OFF  
when input voltage becomes 1.4V or lower.  
The B to G types integrate CL discharge function which enables the electric charge at the output capacitor CL to be discharged  
via the internal 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.  
Three types of package SOT-25 (A/B/C types only), USP-6C, and 0.4mm low height USP-6EL (A/B/C types only) are available.  
■FEATURES  
■APPLICATIONS  
●Mobile phones, Smart phones  
●Bluetooth headsets  
Driver Transistor Built-In  
: 0.42Ω P-ch driver transistor  
0.52Ω N-ch switch transistor  
: 2.0V ~ 6.0V (A/B/C types)  
1.8V ~ 6.0V (D/E/F/G types)  
: 0.8V ~ 4.0V  
Input Voltage  
●Mobile WiMAX PDAs, MIDs, UMPCs  
●Portable game consoles  
Output Voltage  
●Digital cameras, Camcorders  
●MP3 Players, Portable Media Players  
●Notebook computers  
High Efficiency  
: 92% (TYP.)  
Output Current  
: 600mA  
Oscillation Frequency  
Maximum Duty Cycle  
Control Methods  
: 1.2MHz, 3.0MHz (+15%)  
: 100%  
: PWM (XC9235)  
PWM/PFM Auto (XC9236)  
PWM/PFM Manual (XC9237)  
: Current Limiter Circuit Built-In  
(Constant Current & Latching)  
CL Discharge (B/C/D/E/F/G types)  
High Speed Soft Start (B/F/G type)  
: Low ESR Ceramic Capacitor  
: SOT-25 (A/B/C types only), USP-6C  
USP-6EL(A/B/C types only)  
: EU RoHS Compliant, Pb Free  
■
TYPICAL APPLICATION CIRCUIT  
Function  
●XC9235/XC9236/XC9237  
A/B/C/E/G types (Output Voltage Fixed)  
Capacitor  
Packages  
Environmentally Friendly  
■
TYPICAL PERFORMANCE  
CHARACTERISTICS  
●Efficiency vs. Output Current（fOSC=1.2MHz, VOUT=1.8V）  
●XC9235/XC9236/XC9237  
PWM/PFM A utomatic Sw itc hing Control  
100  
D/F types (Output Voltage Externally Set)  
90  
80  
VIN= 4.2V  
70  
PWM Control  
VIN= 4.2V  
3.6V  
2.4V  
3.6V  
2.4V  
60  
50  
40  
30  
20  
10  
0
0.1  
1
10  
100  
1000  
Output Current:IOUT(mA)  
1/33  
1234567...33

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