|
XC6365-XC6366 Datasheet, PDF (1/2 Pages) Torex Semiconductor – PWM PWM/PFM | |||
|
________________________________________________________________________________________________________________ â
XC6365/XC6366ç³»åãPWMãPWM/PFMåæ¢éåDC/DCæ§å¶å¨
æ¦ããè¦
XC6365/XC6366ç³»åæ¯å
ç½®é«éä½éæçµé»é©±å¨å¨çéç¨é«é¢
éåDC/DCæ§å¶å¨éæçµè·¯ã使ç¨æ¶ä½ç®¡ã线åãäºæ管åçµ
容å¨å
±4ç§å¤ç½®å
件ï¼å¯æ建è¾åºçµæµä¸º1A以ä¸çé«æçéå
DC/DC转æ¢å¨ã
该å¨ä»¶å¯å¨1.5Vï½6.0V(精度±2.5ï¼
)èå´å
ï¼ä»¥0.1Vçé´é
è¿è¡è®¾å®(VOUTå)ã并ä¸ï¼é¤äºVOUTåä¹å¤ï¼è¿å¤æå
ç½®1.0V
ç åº å çµ å æº ï¼ å¯ ä»¥ å¤ ç½® å
件 ä»» æ 设 å® è¾ åº çµ å ç å å· (FB
å)ã
å å¼å
³é¢çé«è¾¾300kHzï¼å¯ä½¿ç¨å°åå¤ç½®å
件ã
å¨å°è´è½½æ¶ï¼PWMï¼PFMåæ¢æ§å¶åXC6366ç³»å以PFMå·¥ä½æ¨¡å¼
è¿è¡å·¥ä½ãå æ¤ï¼å¨ä»å°è´è½½è³å¤§è¾åºçµæµçæ´ä¸ªè´è½½èå´å
ï¼
è¾¾å°é«æçã
软å¯å¨æ¶é´æï¼å¨å
é¨è®¾å®ä¸º10msçåå·(AãBå)ï¼ä»¥åå¯ç¨
å¤ç½®çµé»åçµå®¹å¨è¿è¡è°æ´ççåå·(CãDå)ã
使ç¨å¾
æºåè½ï¼å¯åæ¢å·¥ä½ä½¿çµæµæ¶èè¾¾å°0.5µA以ä¸(CE端
"L")ã
å
ç½®U.V.L.O.åè½ï¼å½è¾å
¥çµåå¨è§å®çµå以ä¸æ¶ï¼ä¼å¼ºå¶æ§
å°å°å¤ç½®æ¶ä½ç®¡æå¼ã
å¼èæå
VOUT
(FB)
CE
5
4
123
EXT/ VDD GND
SOT-25
(TOP VIEW)
çµè·¯æ¡å¾
(1) XC6365ãXC6366ç³»åãAãCå(VOUTå)
VOUT
Phase
Compensation
VDD
Error Amp.
+
-
PWM
Comparator
+
-
Buffer,
Driver
EXT/
CE
Vref with
Soft Start,
CE
PWM/PFM
Controler
Ramp Wave
Generator,
OSC
GND
ç¹ããç¹
è¾å
¥çµåèå´
ï¼2.2Vï½10V
è¾åºçµåèå´
ï¼å¨1.5Vï½6.0Vèå´å
ï¼å¯ä»¥0.1Vé´é
è¿è¡è®¾å®ã
设å®çµå精度±2.5ï¼
å·¥ä½é¢ç
ï¼300kHz±15ï¼
客æ·äº§å180ã500kHz
æ大è¾åºçµæµ
ï¼1.0A以ä¸(VINï¼5.0VãVOUTï¼3.0V)
é«æç
ï¼92ï¼
(TYP.)
å¾
æºåè½
ï¼ISTBï¼0.5µA(max.)
å¤æ软å¯å¨æ¶é´å¤é¨è®¾å®å
å¤æè¾åºçµåå
é¨è®¾å®å(VOUTå)åå¤é¨è®¾å®å(FBå)
SOT-25å°è£
å¼è说æ
å¼èåºå·
1
2
3
符å·
EXT/
VDD
GND
4
CE
5
VOUT
(FB)
åããè½
è¿æ¥å¤ç½®æ¶ä½ç®¡
çµæº
æ¥å°
åæºæ§å¶
(CãD åï¼è½¯å¯å¨å¤é¨è®¾å®ã
å
¼è½¯å¯å¨çµå®¹å¨è¿æ¥)
è¾åºçµåçæµ
(BãD åï¼è¾åºçµåå¤é¨è®¾å®)
(2) XC6365ãXC6366ç³»åãBãDå(FBå)
Phase
Compensation
VDD
Error Amp.
PWM
FB
+
Comparator
+
-
Buffer,
Driver
EXT/
-
CE
Vref with
Soft Start,
CE
PWM/PFM
Controler
Ramp Wave
Generator,
OSC
GND
47
|
▷ |