ç¹ç¹
å3/4®å5 I / Oçmicro SMDåSOT - 23 - 5å°è£
é»è3/4æ§å¶ä1/2¿è1/2
ç ̈³å®ä ̧é¶ç·åé«åè' ̈çé1/2çμ容
å¿«éå1/4å ̄
çå ³æåçè· ̄çμæμéå¶
è ̄'æ
LP3985æ ̄ä ̧ä ̧ºä3/4¿æºåæ 线åºç ̈ä ̧èå»çæ§è1/2å空é'çè¦æ±ã
LP3985æ ̄ä ̧ä ̧ªå°å1μF± 30ï1/4 çé¶ç·æé«åè' ̈çé1/2è3/4åºçμ容ç ̈³å®ã å3/4®åSMDéè¦å°1/2å ̄è1/2å°çå°å·çμè· ̄æ¿é¢ç§ ̄ - åºç ̈çμè· ̄æ»é¢ç§ ̄å ̄å°äº2.0æ ̄« ç±³x 2.5mmçä ̧ä ̧ª1206大å°çä ̧å°é ̈åã
LP3985çæ§è1/2ä1/4åï1/4çμæ± ä3/4çμç³»ç»æä3/4è¶ ä1/2åªé³ï1/4éå ̧ ̧ä1/2åå·®åä1/2éæçμæμã ç ̈³åå ̈çæ¥å°çμæμä» ç¥æå¢å è3/4å¦ï1/4è¿ä ̧æ¥å»¶é¿çμæ± çä1/2¿ç ̈å ̄¿å1/2ã
ä ̧ä ̧ªå ̄éçå¤é ̈æè· ̄çμ容è1/2éä1/2è3/4åºåªå£°ï1/4èä ̧ä1/4åæ ¢çè'è1/21/2ç¬æååºã å¿«éå ̄å ̈æ¶é'æ ̄éè¿å©ç ̈ä ̧ªå é ̈çμæºçμè· ̄ä ̧ï1/4ç§ ̄æé¢æ¶è'¹çæè· ̄çμ容ã
çμæºæå¶æ ̄å ̈ä1/2é¢çè¶ è¿50åè'ï1/4并å1/4å§å ̈1kHzæ ̈åºã é«çμæºæå¶æ ̄å ̧ ̧è§çμæ± ä3/4çμçμè· ̄çä1/2è3/4å ¥çμåä¿æå°ã
è ̄¥è®3/4å¤æ ̄移å ̈çμè ̄åç±»ä1/41/4çμæ± ä3/4çμçæ 线åºç ̈ççæ³éæ©ã å®æä3/4é«è3/43/4150æ ̄«å®ï1/42.5Vè³6Vçè3/4å ¥ã LP3985æ¶èå°äº1.5μAï1/4并å ̈ç¦æ¢æ ̈¡ å1/4å¿«éæ¥éæ¶é'è¶ è¿200μSã
LP3985æ ̄å ̈5å¹å ̧å°å ̧ç¹çmicro SMDï1/45å¹å ̧大ççmicro SMDï1/45ççèåmicro SMDå5å1/4èSOT - 23å°è£ ã æ§è1/2ä ̧º-40 ° Cè³+125 ° Cæ ̧©åº¦èå'ï1/4å ̄å ̈2.5Vï1/42.6Vï1/42.7Vï1/42.8Vï1/42.85Vï1/42.9Vï1/43.0Vã 3.1Vï1/43.2Vï1/43.3Vï1/44.7Vï1/44.75Vï1/44.8Vå5.0Vè3/4åºçμåã å ¶ä»è3/4åºçμåå ̈2.5Vè³5.0Væä ̧ä ̧ªåLP3985éé¡ ¹ï1/4è ̄·èç³»å1/2家åå ̄1/4ä1/2éå®åäºå¤ã
ä ̧»è¦è§æ 1/4
2.5è³6.0Vè3/4å ¥èå'
150æ ̄«å®ä¿è ̄è3/4åº
50åè'çPSRRå ̈1kHz @ V IN = V OUT + 0.2V
<=1.5μAéæçµæµæ¶å
³é
å¿«éå ̄å ̈æ¶é'ï1/4200μsï1/4å ̧åï1/4
100mVçæ大åéä ̧150æ ̄«å®è'è1/21/2
30μVrmsè3/4åºåªå£°è¶ è¿10Hzè³100kHzï1/4å ̧åå1/4ï1/4
-40è³+125 ° Cçç»å·¥ä1/2æ ̧©åº¦èå'
2.5Vï1/42.6Vï1/42.7Vï1/42.8Vï1/42.85Vï1/42.9Vï1/43.0Vï1/43.1Vï1/43.2Vï1/43.3Vï1/44.7Vï1/44.75Vï1/44.8Vå5.0Vè3/4åºæ å
åºç ̈
CDMAèçªææº
®å 1/2å ̧¦CDMAèçªææº
GSMèçªææº
ä3/4¿æºå1/4ä¿¡æ ̄家çμ