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參數資料
| 型號： | LM3351 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Switched Capacitor Voltage Converter |
| 中文描述： | 開關電容電壓轉換器 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 265K |
| 代理商： | LM3351 |
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.
Key Specifications
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
Low quiescent current extends battary life
Features
n
Conversion of 3.3V to 5V, or 5V to 3.3V
n
Small Mini SO-8 package
n
No inductor required
Applications
n
Any mixed 5V and 3.3V system
n
Laptop computers and PDAs
n
Handheld instrumentation
n
PCMCIA cards
Ordering Information
Order Number
Package Type
NSC Package
Drawing
MUA08A
MUA08A
Package
Marking
S05A
S05A
Supplied As
LM3351MMX
LM3351MM
Mini SO-8
Mini SO-8
3500 Units on Tape and Reel
1000 Units on Tape and Reel
Basic Operating Circuits
Connection Diagram
Step-Up Converter
DS100146-1
Step-Down Converter
DS100146-2
Mini SO8 Package
DS100146-3
Top View
December 1999
L
1999 National Semiconductor Corporation
DS100146
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM3351MM | Switched Capacitor Voltage Converter |
| LM3351MMX | Switched Capacitor Voltage Converter |
| LM3355MM-4.1 | Regulated 50mA Buck-Boost Switched Capacitor DC/DC Converter |
| LM3355MMX-4.1 | Regulated 50mA Buck-Boost Switched Capacitor DC/DC Converter |
| LM336AH-2.5 | 2.5V Reference |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM3351A WAF | 制造商:Texas Instruments 功能描述: |
| LM3351AM E WAF | 制造商:Texas Instruments 功能描述: |
| LM3351MM | 功能描述:IC REG MULTI CONFIG 50MA 8-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關:- 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® 供應商設備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
| LM3351MM/NOPB | 功能描述:IC REG MULTI CONFIG 50MA 8-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關:- 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® 供應商設備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
| LM3351MM/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Charge Pump Converter IC |
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