參數(shù)資料
型號(hào)： R1171J431D-T1-F
廠商： RICOH COMPANY LTD
元件分類： 固定正電壓?jiǎn)温份敵鯨DO穩(wěn)壓器
英文描述： 4.3 V FIXED POSITIVE LDO REGULATOR, 0.18 V DROPOUT, PSSO5
封裝： HALOGEN FREE AND ROHS COMPLIANT, TO-252, 5 PIN
文件頁(yè)數(shù)： 13/24頁(yè)
文件大?。?/td> 502K
代理商： R1171J431D-T1-F
R1171x
20
Technical Notes on External Components and Typical Application
1. Phase Compensation
In these ICs, phase compensation is made with the output capacitor for securing stable operation even if the
load current is varied. For this purpose, use a capacitor with the capacitance range from 4.7
μF to 10.0μF, as CL.
In case that using a tantalum capacitor and the ESR of the tantalum capacitor is too large, unstable operation
may result. Fully evaluation is necessary for the whole circuit with considering the frequency characteristic.
2. Mounting on PCB
Make VDD and GND lines sufficient. If their impedance is high, large current may flow and the pick-up noise or
unstable operation may result. Therefore use a capacitor with a capacitance range from 4.7
μF to 10.0μF
between VDD pin and GND pin as close as possible.
Further, set an output capacitor between VOUT pin and GND pin for phase compensation as close as possible.
(Refer to the example of typical application)
IN
VDD
VOUT
CE
GND
CL
CI
OUT
R1171xxx1B
R1171Sxx1B Typical Application
1.5V <
= VOUT<1.8V : CI=10μF (Ceramic),CL=10μF (Ceramic)
1.8V <
= VOUT <
= 5.0V : CI=4.7μF (Ceramic),CL=4.7μF (Ceramic)
3. Output Short Protection Function
In the R1171x Series, the output short protection function is built in, further, if the output is short to the GND or
other voltage line, the chip inside is heating, as a result, in case that the junction temperature becomes equal or
more than 150
°C (Typ.), the built-in thermal shutdown circuit works. If the junction temperature becomes equal
or more than 150
°C (Typ.), the IC is protected by the output short protection circuit and the thermal shutdown
circuit.
相關(guān)PDF資料
PDF描述
R1171J441C-T1-F 4.4 V FIXED POSITIVE LDO REGULATOR, 0.18 V DROPOUT, PSSO5
R1171J451C-T1-F 4.5 V FIXED POSITIVE LDO REGULATOR, 0.18 V DROPOUT, PSSO5
R1171J461D-T1-F 4.6 V FIXED POSITIVE LDO REGULATOR, 0.18 V DROPOUT, PSSO5
R1171J471C-T1-F 4.7 V FIXED POSITIVE LDO REGULATOR, 0.18 V DROPOUT, PSSO5
R1171J471D-T1-F 4.7 V FIXED POSITIVE LDO REGULATOR, 0.18 V DROPOUT, PSSO5
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