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参数资料
| 型号： | LM3351MM/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 275 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | MINI, SO-8 |
| 文件页数： | 1/10页 |
| 文件大小： | 298K |
| 代理商： | LM3351MM/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
相关PDF资料 |
PDF描述 |
|---|---|
| LM336BZ-AP | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.49 V, PBCY3 |
| LM368N-2.5 | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 2.5 V, PDIP8 |
| LM385H-2.5 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, MBCY2 |
| LM385BYH-2.5 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, MBCY2 |
| LM385BH-2.5 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, MBCY2 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM3351MMX | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Switched Capacitor Voltage Converter |
| LM3351MMX/NOPB | 功能描述:IC REG MULTI CONFIG 50MA 8-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:3.3V 输入电压:4.5 V ~ 24 V PWM 型:- 频率 - 开关:- 电流 - 输出:125mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 包装:Digi-Reel® 供应商设备封装:SOT-6 其它名称:MAX1836EUT33#TG16DKR |
| LM3352 | 制造商:NSC 制造商全称: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 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型: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 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
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