參數(shù)資料
型號(hào)： LM317MQDCYRG3
廠商： Texas Instruments, Inc.
英文描述： Three-Terminal Adjustable regulator
中文描述： 三端可調(diào)穩(wěn)壓
文件頁數(shù)： 7/11頁
文件大小： 187K
代理商： LM317MQDCYRG3
www.ti.com
APPLICATION INFORMATION
LM317M
R
1
240
I
Adj
R
2
Adjust
C
i
(Note A)
0.1
μ
F
C
O
(Note B)
1.0
μ
F
V
I
V
O
(Note C)
NOTES: A. C
i
is not required, but is recommended, particularly if the regulator is not in close proximity
to the power-supply filter capacitors. A 0.1-
μ
F disc or 1-
μ
F tantalum provides sufficient
bypassing for most applications, especially when adjustment and output capacitors are used.
B. C
O
improves transient response, but is not needed for stability.
C. V
O
is calculated as shown:
Because I
Adj
typically is 50
μ
A, it is negligible in most applications.
D. C
ADJ
is used to improve ripple rejection; it prevents amplification of the ripple as the output voltage
is adjusted higher. If C
ADJ
is used, it is best to include protection diodes.
E. If the input is shorted to ground during a fault condition, protection diodes provide measures to
prevent the possiblility of external capacitors discharging through low-impedance paths in the IC. By
providing low-impedance discharge paths for C
O
and C
ADJ
, respectively, D1 and D2 prevent the
capacitors from discharging into the output of the regulator.
Output
Input
V
ref
= 1.25 V
V
O
V
ref
1
R
2
R
1
(
I
Adj
R
2
)
D1
(Note E)
1N4002
D2
(Note E)
1N4002
C
ADJ
(Note D)
LM317M
3-TERMINAL ADJUSTABLE REGULATOR
SLVS297M–APRIL 2000–REVISED OCTOBER 2005
Figure 14. Adjustable Voltage Regulator
7
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM317MQDCYRG4 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 4 Pin 500mA Adj Pos Vltg Reg RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L
LM317MQKTPR 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 3-Trm 500mA Adj Pos Voltage Regulator RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L
LM317MS 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MEDIUM CURRENT 1.2 TO 37V ADJUSTABLE VOLTAGE REGULATOR
LM317MSTT3 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 500mA ADJ 1.2-37V RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L
LM317MSTT3G 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 500mA ADJ 1.2-37V Positive RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L
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