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參數(shù)資料
| 型號： | LM3351MMX/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 275 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | MINI, SO-8 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 298K |
| 代理商： | LM3351MMX/NOPB |
LM3351
Switched Capacitor Voltage Converter
General Description
The LM3351 is a CMOS charge-pump voltage converter
which efficiently provides a 3.3V to 5V step-up, or 5V to 3.3V
step-down. The LM3351 is pin for pin compatible with the
LM3350 but consumes 66% less quiescent current. The
LM3351 uses four small, low cost capacitors to provide the
voltage conversion. It eliminates the cost, size and radiated
EMI related to inductor based circuits, or the power loss of a
linear regulator. Operating power conversion efficiency
greater than 90% provides ideal performance for battery
powered portable systems.
The architecture provides a fixed voltage conversion ratio of
3/2 or 2/3. Thus it can be used for other DC-DC conversions
as well.
Features
n
Conversion of 3.3V to 5V, or 5V to 3.3V
n
200 kHz switch frequency allows use of very small,
inexpensive capacitors.
n
4.2
typical step-up output impedance
n
1.8
typical step-down output impedance
n
95% typical power conversion efficiency at 50 mA
n
250 nA typical shutdown current
n
No inductor required
n
Low quiescent current extends battary life
n
Small Mini SO-8 package
Applications
n
Any mixed 5V and 3.3V system
n
Laptop computers and PDAs
n
Handheld instrumentation
n
PCMCIA cards
Basic Operating Circuits
Step-Up Converter
Step-Down Converter
10014601
10014602
December 1999
LM3351
Switched
Capacitor
V
oltage
Converter
2004 National Semiconductor Corporation
DS100146
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3352 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Regulated 200 mA Buck-Boost Switched Capacitor DC/DC Converter |
| LM3352-3.0EVAL | 功能描述:EVALUATION BOARD FOR LM3352-3.0 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓撲結(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| LM3352-3.3EVAL | 功能描述:EVALUATION BOARD FOR LM3352-3.3 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓撲結(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| LM3352MTC-2.5 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Regulated 200 mA Buck-Boost Switched Capacitor DC/DC Converter |
| LM3352MTC-2.5/NOPB | 功能描述:IC REG MULTI CONFIG 16-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應(yīng)商設(shè)備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
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