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參數(shù)資料
| 型號： | LM2937-25 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 400mA and 500mA Voltage Regulators |
| 中文描述： | 400mA和500mA的穩(wěn)壓器 |
| 文件頁數(shù)： | 1/11頁 |
| 文件大?。?/td> | 300K |
| 代理商： | LM2937-25 |
LM2937-2.5, LM2937-3.3
400mA and 500mA Voltage Regulators
General Description
The LM2937-2.5 and LM2937-3.3 are positive voltage regu-
lators capable of supplying up to 500 mA of load current.
Both regulators are ideal for converting a common 5V logic
supply, or higher input supply voltage, to the lower 2.5V and
3.3V supplies to power VLSI ASIC’s and microcontrollers.
Special circuitry has been incorporated to minimize the qui-
escent current to typically only 10 mA with a full 500 mA load
current when the input to output voltage differential is greater
than 5V.
The LM2937 requires an output bypass capacitor for stabil-
ity. As with most regulators utilizing a PNP pass transistor,
the ESR of this capacitor remains a critical design param-
eter, but the LM2937-2.5 and LM2937-3.3 include special
compensation circuitry that relaxes ESR requirements. The
LM2937 is stable for all ESR ratings less than 5
. This al-
lows the use of low ESR chip capacitors.
The regulators are also suited for automotive applications,
with built in protection from reverse battery connections,
two-battery jumps and up to +60V/50V load dump tran-
sients. Familiar regulator features such as short circuit and
thermal shutdown protection are also built in.
Features
n
Fully specified for operation over 40C to +125C
n
Output current in excess of 500 mA (400mA for
SOT-223 package)
n
Output trimmed for 5% tolerance under all operating
conditions
n
Wide output capacitor ESR range, 0.01
up to 5
n
Internal short circuit and thermal overload protection
n
Reverse battery protection
n
60V input transient protection
n
Mirror image insertion protection
Connection Diagram and Ordering Information
TO-220 Plastic Package
DS100113-24
Front View
Order Number LM2937ET-2.5, LM2937ET-3.3,
See NS Package Number T03B
SOT-223 Plastic Package
DS100113-25
Front View
Order Number LM2937IMP-2.5, LM2937IMP-3.3,
See NS Package Number MA04A
TO-263 Surface-Mount Package
DS100113-26
Top View
DS100113-27
Side View
Order Number LM2937ES-2.5, LM2937ES-3.3,
See NS Package Number TS3B
February 1998
L
1998 National Semiconductor Corporation
DS100113
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM2937-3.3 | 400mA and 500mA Voltage Regulators |
| LM2937 | 8-Bit Shift Registers With Output Registers 16-PDIP -40 to 85 |
| LM293D | SINGLE SUPPLY, LOW POWER DUAL COMPARATORS |
| LM293D | Low power dual voltage comparator |
| LM293D | 8-Bit Shift Registers With 3-State Output Registers 16-SOIC -40 to 85 |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM29373ET-2.5 | 制造商:Texas Instruments 功能描述:500 MA LOW DROPOUT REGULATOR - Rail/Tube |
| LM2937EI-12 | 制造商:Texas Instruments 功能描述: |
| LM2937EM-3.3 | 制造商:Exar Corporation 功能描述:Voltage Regulator |
| LM2937ES | 制造商:Texas Instruments 功能描述: |
| LM2937ES-10 | 功能描述:低壓差穩(wěn)壓器 - LDO 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(diào)節(jié):0.3 % 輸出端數(shù)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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