目录F4p嘉泰姆

1.产品概述                       2.产品特点F4p嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 F4p嘉泰姆
5.产品封装图                     6.电路原理图                   F4p嘉泰姆
7.功能概述                        8.相关产品F4p嘉泰姆

一,产品概述(General Description)  F4p嘉泰姆

         The CXSD62133 is a high efficiency monolithic synchronous buck regulator. CXSD62133 operates with a constant 1.5MHz switching frequency and using the inductor current as a controlled quantity in the current modearchitecture. The 3.5V to 7.2V input voltage range makes the CXSD62133 ideally suited for single Li-Ion battery powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable electrical devices. The internally fixed 1.5MHz operating frequency allows the use of small surface mount inductors andF4p嘉泰姆
capacitors. The synchronous switches included inside increase the efficiency and eliminate the need for an external Schottky diode.F4p嘉泰姆
        The CXSD62133 is available in TDFN2x2-8 packageF4p嘉泰姆
二.产品特点(Features)F4p嘉泰姆

1A Output CurrentF4p嘉泰姆
Support 4 AA alkaline, NiCd or NiMH batteriesF4p嘉泰姆
Wide 3.5V~7.2V Input VoltageF4p嘉泰姆
Fixed 1.5MHz Switching FrequencyF4p嘉泰姆
Low Dropout Operating at 100% duty cycleF4p嘉泰姆
Low 25μA Quiescent CurrentF4p嘉泰姆
Integrate Synchronous RectifierF4p嘉泰姆
0.6V Low Reference VoltageF4p嘉泰姆
<0.5μA Input Current during ShutdownF4p嘉泰姆
Current-Mode Operation with Internal CompensationF4p嘉泰姆
- Stable with Ceramic Output CapacitorsF4p嘉泰姆
- Fast Line Transient ResponseF4p嘉泰姆
Short-Circuit ProtectionF4p嘉泰姆
Over-Temperature Protection with HysteresisF4p嘉泰姆
Available in TDFN2x2-8 PackageF4p嘉泰姆
Lead Free and Green Devices AvailableF4p嘉泰姆
三,应用范围 (Applications)F4p嘉泰姆

E-BookF4p嘉泰姆
ToyF4p嘉泰姆
Portable InstrumentF4p嘉泰姆
四.下载产品资料PDF文档 F4p嘉泰姆

需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！F4p嘉泰姆

 F4p嘉泰姆

五,产品封装图 (Package)F4p嘉泰姆

F4p嘉泰姆
六.电路原理图F4p嘉泰姆

F4p嘉泰姆
F4p嘉泰姆
七,功能概述F4p嘉泰姆

Dropout Operation (Cont.)F4p嘉泰姆

An important detail to remember is that on resistance of P-FET switch will increase at low input supply voltage.F4p嘉泰姆
Therefore, the user should calculate the power dissipa-tion when the CXSD62133 is used at 100% duty cycle withF4p嘉泰姆
low input voltage. F4p嘉泰姆
Over-Temperature Protection (OTP)F4p嘉泰姆
The over-temperature circuit limits the junction tempera-ture of the CXSD62133. When the junction temperature ex-F4p嘉泰姆
ceeds 150oC, a thermal sensor turns off the both power MOSFETs, allowing the devices to cool. The thermal sen-F4p嘉泰姆
sor allows the converters to start a soft-start process and regulate the output voltage again after the junction tem-F4p嘉泰姆
perature cools by 30oC. The OTP designed with a 30oC hysteresis lowers the average Junction Temperature (TJ)F4p嘉泰姆
during continuous thermal overload conditions, increas-ing the life time of the device. F4p嘉泰姆
Short-Circuit ProtectionF4p嘉泰姆
When the output is shorted to ground, the frequency of the oscillator is reduced to about 210 kHz, 1/7 of the nomi-F4p嘉泰姆
nal frequency. This frequency fold back ensures that the inductor current has more time to decay, thereby prevent-F4p嘉泰姆
ing runaway. The oscillator’s frequency will progressively increase to 1.5MHz when VFB or VOUT rises above 0V.F4p嘉泰姆
Low Battery DetectionF4p嘉泰姆
The low battery detection is used to monitor the battery voltage and to generate a signal. This function includesF4p嘉泰姆
two pins, LBI is the inverting input of the comparator and LBO is an open drain output (See Block Diagram). WhenF4p嘉泰姆
the LBI voltage drops below the threshold voltage 0.6V,the open drain device will turn on and LBO becomes low.F4p嘉泰姆
The Low battery threshold voltage can be programmed with a resistive divider from battery to LBI pin to the round.F4p嘉泰姆
Since the LBO is an open drain output, it usually requires an external pull-up resistor. F4p嘉泰姆

八,相关产品         更多同类产品.......F4p嘉泰姆

共有条评论 用户名: 密码: 验证码: 匿名发表