PDF《LMR12010》

LMR12010 LMR12010 采用 SOT-23 封装的 SIMPLE SWITCHER?

20 V 输入电压、1 A 降压稳压器 文献编号:ZHCSA23A LMR12010 September 29,

2011 SIMPLE SWITCHER? 20Vin, 1A Step-Down Voltage Regulator in SOT-23

30166501 Features Input voltage range of 3V to 20V Output voltage range of 0.

8V to 17V Output current up to 1A 1.6MHz (LMR12010X) and

3 MHz (LMR12010Y) switching frequencies Low shutdown Iq,

30 nA typical Internal soft-start Internally compensated Current-Mode PWM operation Thermal shutdown Thin SOT23-6 package (2.97 x 1.65 x 1mm) Fully enabled for WEBENCH? Power Designer Performance Benefits Extremely easy to use Tiny overall solution reduces system cost Applications Point-of-Load Conversions from 3.3V, 5V, and 12V Rails Space Constrained Applications Battery Powered Equipment Industrial Distributed Power Applications Power Meters Portable Hand-Held Instruments System Performance Efficiency vs Load Current - X VOUT = 5V

30166536 Efficiency vs Load Current - Y VOUT = 5V

30166534 WEBENCH? is a registered trademark of National Semiconductor Corp. ?

2011 National Semiconductor Corporation

301665 www.national.com LMR12010 SIMPLE SWITCHER 20Vin, 1A Step-Down Voltage Regulator in SOT-23

2011 年9月29 日 采用 SOT-23 封装的 SIMPLE SWITCHER ?

20 V 输入电压、

1 A 降压稳压器 LMR12010 采用 SOT-23 封装的 SIMPLE SWITCHER ?

20 V 输入电压、

1 A 降压稳压器 LMR12010 特性 ? 输入电压范围:3 V至20 V ? 输出电压范围:0.8 V 至17 V ? 输出电流高达 1A ? 1.6 MHz (LMR12010X) 和3MHz (LMR12010Y) 开关频率 ? 低停机静态电流 (Iq):30 nA(典型值) ? 内部软起动 ? 内部补偿 ? 电流模式脉宽调制 (PWM) 操作 ? 具有热关断功能 ? 纤巧型 SOT23-6 封装 (2.97 x 1.65 x

1 mm) ? 得到 WEBENCH? Power Designer 工具的全面支持 系统性能 性能优势 ? 易用性极佳 ? 纤巧的总体解决方案降低了系统成本 效率与负载电流的关系曲线 - X VOUT =

5 V 效率与负载电流的关系曲线 - Y VOUT =

5 V 应用 ? 从3.3 V、5 V 和12 V 电源轨的负载点转换 ? 空间受限型应用 ? 电池供电型设备 ? 工业分布式电源应用 ? 功率表 ? 便携手持式仪器 Connection Diagrams

30166505 6-Lead TSOT NS Package Number MK06A

30166560 Pin

1 Indentification Ordering Information Order Number Package Type NSC Package Drawing Package Marking Supplied As LMR12010XMKE TSOT-6 MK06A SF7B

250 Units on Tape and Reel LMR12010XMK

1000 Units on Tape and Reel LMR12010XMKX

3000 Units on Tape and Reel LMR12010YMKE SF8B

250 Units on Tape and Reel LMR12010YMK

1000 Units on Tape and Reel LMR12010YMKX

3000 Units on Tape and Reel Pin Descriptions Pin Name Function

1 BOOST Boost voltage that drives the internal NMOS control switch. A bootstrap capacitor is connected between the BOOST and SW pins.

2 GND Signal and Power ground pin. Place the bottom resistor of the feedback network as close as possible to this pin for accurate regulation.

3 FB Feedback pin. Connect FB to the external resistor divider to set output voltage.

4 EN Enable control input. Logic high enables operation. Do not allow this pin to float or be greater than VIN + 0.3V.

5 VIN Input supply voltage. Connect a bypass capacitor to this pin.

6 SW Output switch. Connects to the inductor, catch diode, and bootstrap capacitor. www.national.com

2 LMR12010

5 引脚 SOT-23 封装

6 引脚 TSOT 封装 NS 封装编号 MK06A 引脚

1 记号 连线图 订购信息 订购编号 封装类型 NSC 封装图例 封装标记 装运方式 LMR12010XMKE TSOT-6 MK06A SF7B 250,带装和卷装 LMR12010XMK 1000,带装和卷装 LMR12010XMKX 3000,带装和卷装 LMR12010YMKE SF8B 250,带装和卷装 LMR12010YMK 1000,带装和卷装 LMR12010YMKX 3000,带装和卷装 引脚说明 引脚 名称 功能