參數(shù)資料
型號: R3133Q29EC3-TR
廠商: RICOH COMPANY LTD
元件分類: 電源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4
封裝: ULTRA SMALL, SC-82-AB, 4 PIN
文件頁數(shù): 9/27頁
文件大小: 245K
代理商: R3133Q29EC3-TR
R3132QxxA/C, R3133QxxA/C
17
Operation of R3133Q Series
OUT
VDD
GND
Vref
+
-
Nch
Rb
Ra
Pch
Comparator
Delay
Circuit
Block Diagram
&0262XWSXW7\SH
2XWSLQLVFRQQHFWHGWRWKH GUDLQRI 1FK7UDQG 3FK7U LQWKLV,&
1FK 2SHQ 'UDLQ 2XWSXW 7\SH ,
2XWSLQLVFRQQHFWHGWRWKH GUDLQRI 1FK7ULQWKLV,&
287SLQVKRXOGEHSXOOHGXSWR9'' RUDQH[WHUQDO YROWDJH OHYHO
GND
A
B
1
GND
tDELAY
Detector Threshold (VDET)
=Released Voltage
Supply
Voltage
(VDD)
Output
Voltage
(VOUT)
Minimum Operating Voltage
(VDDL)
2
3
4
5
Operation Diagram
,QWKHDERYH GLDJUDP
x 2XWSXWYROWDJH EHFRPHVHTXDOWR*1'OHYHO
y :KHQ WKH VXSSO\YROWDJHLVGRZQ WR WKH GHWHFWRU WKUHVKROG OHYHO 3RLQW $ 9UHI ≥ 9'' × 5E 5D5E LV WUXH 7KHQ
WKH RXWSXW RI WKH FRPSDUDWRU LV UHYHUVHG WKXV RXWSXW YROWDJH EHFRPHV HTXDO WR WKH VXSSO\ YROWDJH 1FK RSHQ GUDLQ
RXWSXW W\SH HTXDOWRSXOOXSYROWDJH
z :KHQ WKH VXSSO\ YROWDJH LV ORZHU WKDQ PLQLPXP RSHUDWLQJ YROWDJH WKH RXWSXW RI WUDQVLVWRU LV LQGHILQLWH WKHUHIRUH
WKH RXWSXWLVDOVRLQGHILQLWH1FKRSHQ GUDLQRXWSXWW\SHWKH RXWSXWYROWDJH OHYHO LVHTXDOWRSXOOXSYROWDJH
{ 2XWSXWYROWDJH LVHTXDO WRWKHVXSSO\YROWDJH1FKRSHQGUDLQ RXWSXWW\SH HTXDOWRSXOOXS9ROWDJH
| :KHQ WKH VXSSO\ YROWDJH LV KLJKHU WKDQ WKH UHOHDVHG YROWDJH 3RLQW % 9UHI ≤ 9'' × 5E 5D 5E LV WUXH 7KHQ WKH
RXWSXW RI WKH FRPSDUDWRU LV UHYHUVHG WKXV WKH RXWSXW YROWDJH EHFRPHV HTXDO WR *1' OHYHO DIWHU WKH RXWSXW GHOD\
WLPH
7KHUH LVQRK\VWHUHVLV UDQJH EHWZHHQWKH GHWHFWRUWKUHVKROGDQGWKHUHOHDVHG YROWDJH
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