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參數資料
| 型號： | LM2926 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| 中文描述： | 無電容，NMOS管，150mA的低壓差穩(wěn)壓器的反向電流保護 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 404K |
| 代理商： | LM2926 |
LM2926/LM2927
Low Dropout Regulator with Delayed Reset
General Description
The LM2926 is a 5V, 500 mA, low dropout regulator with de-
layed reset. The microprocessor reset flag is set low by ther-
mal shutdown, short circuits, overvoltage conditions, drop-
out, and power-up. After the fault condition is corrected, the
reset flag remains low for a delay time determined by the de-
lay capacitor. Hysteresis is included in the reset circuit to
prevent oscillations, and a reset output is guaranteed down
to 3.2V supply input. A latching comparator is used to dis-
charge the delay capacitor, which guarantees a full reset
pulse even when triggered by a relatively short fault condi-
tion. A patented quiescent current reduction circuit drops the
ground pin current to 8 mA at full load when the input-output
differential is 3V or more.
Familiar PNP regulator features such as reverse battery pro-
tection, transient protection, and overvoltage shutdown are
included in the LM2926 making it suitable for use in automo-
tive and battery operated equipment.
The LM2927 is electrically identical to the LM2926 but has a
different pin-out. The LM2927 is pin-for-pin compatible with
the L4947 and TLE4260 alternatives. The LM2926 is
pin-for-pin compatible with the LM2925.
Features
n
5% output accuracy over entire operating range
n
Dropout voltage typically 350 mV at 500 mA output
n
Externally programmed reset delay
n
Short circuit proof
n
Reverse battery proof
n
Thermally protected
n
LM2926 is pin-for-pin compatible with the LM2925
n
P
+
Product Enhancement tested
Applications
n
Battery operated equipment
n
Microprocessor-based systems
n
Portable instruments
Typical Application
Connection Diagrams and Ordering Information
DS010759-1
*
Required if regulator is located far (
>
2") from power supply filter.
O
must be at least 10 μF to maintain stability. May be increased without bound to maintain regulation during transients. Locate as close as possible to
**C
5–Lead TO-220
DS010759-2
Front View
Order Number LM2926T
See NS Package Number TO5A
5-Lead TO-220
DS010759-14
Front View
Order Number LM2927T
See NS Package Number TO5A
April 1998
L
1998 National Semiconductor Corporation
DS010759
www.national.com
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| LM2927T | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel 制造商:Texas Instruments 功能描述: |
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| LM2930A | 功能描述:低壓差穩(wěn)壓器 - LDO 5.0V 0.4A Positive RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節(jié):0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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