PDF《LMR10510》

LMR10510 LMR10510采用 SOT-23 和LLP 封装的 SIMPLE SWITCHER ? 5.

5V 输入电压、1A 降压稳压器 文献编号:ZHCSA20A LMR10510 October 31,

2011 SIMPLE SWITCHER? 5.5Vin, 1A Step-Down Voltage Regulator in SOT-23 and LLP Features Input voltage range of 3V to 5.5V Output voltage range of 0.6V to 4.5V Output current up to 1A 1.6MHz (LMR10510X) and

3 MHz (LMR10510Y) switching frequencies Low shutdown Iq,

30 nA typical Internal soft-start Internally compensated Current-Mode PWM operation Thermal shutdown SOT23-5 (2.92 x 2.84 x

1 mm) and LLP-6 (3 x

3 x 0.8 mm) packaging 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, and 5V Rails Space Constrained Applications Battery Powered Equipment Industrial Distributed Power Applications Power Meters Portable Hand-Held Instruments System Performance Efficiency vs Load Current - X VIN = 5V

30165696 Efficiency vs Load Current - Y VIN = 5V

30165697 Typical Application

30165664 ?

2011 Texas Instruments Incorporated

301656 www.ti.com LMR10510 SIMPLE SWITCHER ? 5.5Vin, 1A Step-Down Voltage Regulator in SOT-23 and LLP

2011 年10 月31 日 采用 SOT-23 和LLP 封装的 SIMPLE SWITCHER ? 5.5 V 输入电 压、1 A 降压稳压器 LMR10510 采用 SOT-23 和LLP 封装的 SIMPLE SWITCHER ? 5.5 V 输入电压、

1 A 降压稳压器 LMR10510 特性 ? 输入电压范围:3 V至5.5 V ? 输出电压范围:0.6 V 至4.5 V ? 输出电流高达

1 A ? 1.6 MHz (LMR10510X) 和3MHz (LMR10510Y) 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 ? SOT23-5 (2.92 x 2.84 x

1 mm) 和LLP-6 (3 x

3 x 0.8 mm) 封装 ? 得到 WEBENCH? Power Designer 工具的全面支持 系统性能 典型应用 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 应用 ? 从3.3 V 和5V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 效率与负载电流的关系曲线 - X VIN =

5 V 效率与负载电流的关系曲线 - Y VIN =

5 V Connection Diagrams

30165601 6-Pin LLP

30165603 5-Pin SOT-23 Ordering Information Order Number Frequency Option Package Type NSC Package Drawing Top Mark Supplied As LMR10510XMFE 1.6MHz SOT23-5 MF05A SH7B

250 units Tape and Reel LMR10510XMF

1000 units Tape and Reel LMR10510XMFX

3000 units Tape and Reel LMR10510YMFE 3MHz SH9B

250 units Tape and Reel LMR10510YMF

1000 units Tape and Reel LMR10510YMFX

3000 units Tape and Reel LMR10510YSDE LLP-6 SDE06A L268B

250 units Tape and Reel LMR10510YSD

1000 units Tape and Reel LMR10510YSDX

4500 units Tape and Reel www.ti.com

2 LMR10510

5 引脚 SOT-23 封装

6 引脚 LLP 封装 订购编号 频率选项 封装类型 NSC 封装图例 正面标记 装运方式 LMR10510XMFE 1.6 MHz SOT23-5 MF05A SH7B 250,带装和卷装 LMR10510XMF 1000,带装和卷装 LMR10510XMFX 3000,带装和卷装 LMR10510YMFE

3 MHz SH9B 250,带装和卷装 LMR10510YMF 1000,带装和卷装 LMR10510YMFX 3000,带装和卷装 LMR10510YSDE LLP-6 SDE06A L268B 250,带装和卷装 LMR10510YSD 1000,带装和卷装 LMR10510YSDX 4500,带装和卷装 连线图 订购信息 Pin Descriptions 5-Pin SOT23 Pin Name Function

1 SW Switch node. Connect to the inductor and catch diode.

2 GND Signal and power ground pin. Place the bottom resistor of the feedback network as close as possible to this pin.

3 FB Feedback pin. Connect to 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. Pin Descriptions 6-Pin LLP Pin Name Function

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

2 GND Signal and power ground pin. Place the bottom resistor of the feedback network as close as possible to this pin.

3 SW Switch node. Connect to the inductor and catch diode.

4 VIND Power Input supply.

5 VINA Control circuitry supply voltage. Connect VINA to VIND on PC board.

6 EN Enable control input. Logic high enables operation. Do not allow this pin to float or be greater than VINA + 0.3V. DAP Die Attach Pad Connect to system ground for low thermal impedance, but it cannot be used as a primary GND connection.

3 www.ti.com LMR10510

5 引脚 SOT23 封装的引脚说明 引脚 名称 功能

1 SW 开关节点.连接至电感器和箝位二极管.

2 GND 信号和电源接地引脚.将反馈网络的底端电阻器布设在尽可能靠近该引脚的地方.

3 FB 反馈引脚.连接至外部电阻分压器,以设定输出电压.

4 EN 使能控制输入.当该引脚为逻辑高电平时,将使能器件操作.不得允许此引脚浮置或高于 VIN + 0.3 V.

5 VIN 输入电源电压.

6 引脚 LLP 封装的引脚说明 引脚 名称 功能

1 FB 反馈引脚.连接至外部电阻分压器,以设定输出电压.

2 GND 信号和电源接地引脚.将反馈网络的底端电阻器布设在尽可能靠近该引脚的地方.

3 SW 开关节点.连接至电感器和箝位二极管.

4 VIND 输入电源.

5 VINA 控制电路电源电压.在PC 板上将 VINA 连接至 VIND.

6 EN 使能控制输入.当该引脚为逻辑高电平时,将使能器件操作.不得允许此引脚浮置或高于 VINA + 0.3 V. DAP 芯片粘接焊盘 连接至系统地以实现低的热阻抗,但它不可被用作一个主 GND 连接. Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and specifications. VIN -0.5V to 7V FB Voltage -0.5V to 3V EN Voltage -0.5V to 7V SW Voltage -0.5V to 7V ESD Susceptibility 2kV Junction Temperature (Note 2) 150°C Storage Temperature ?65°C to +150°C For soldering specifications: see product folder at www.national.com and www.national.com/ms/MS/MS-SOLDERING.pdf Operating Ratings VIN 3V to 5.5V Junction Temperature ?40°C to +125°C Electrical Characteristics (Note 3), (Note 4) VIN = 5V unless otherwise indicated under the Conditions column. Limits in standard type are for TJ = 25°C only;

limits in boldface type apply over the junction temperature (TJ) range of -40°C to +125°C. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Symbol Parameter Conditions Min Typ Max Units VFB Feedback Voltage 0.588 0.600 0.612 V ΔVFB/VIN Feedback Voltage Line Regulation VIN = 3V to 5V 0.02 %/V IB Feedback Input Bias Current 0.1

100 nA UVLO Undervoltage Lockout VIN Rising 2.73 2.90 V VIN Falling 1.85 2.3 UVLO Hysteresis 0.43 V FSW Switching Frequency LMR10510-X 1.2 1.6 1.95 MHz LMR10510-Y 2.25 3.0 3.75 DMAX Maximum Duty Cycle LMR10510-X

86 94 % LMR10510-Y

82 90 DMIN Minimum Duty Cycle LMR10510-X

5 % LMR10510-Y

7 RDS(ON) Switch On Resistance LLP-6 Package

150 m? SOT23-5 Package

130 195 ICL Switch Current Limit VIN = 3.3V 1.2 1.75 A VEN_TH Shutdown Threshold Voltage 0.4 V Enable Threshold Voltage 1.8 ISW Switch Leakage

100 nA IEN Enable Pin Current Sink/Source

100 nA IQ Quiescent Current (switching) LMR10510X VFB = 0.55 3.3

5 mA LMR10510Y VFB = 0.55 4.3 6.5 mA Quiescent Current (shutdown) All Options VEN = 0V

30 nA www.ti.com

4 LMR10510 最大绝对额定值(注1) 如果需要符合军用 / 航空航天要求的器件,请与德州仪器的 销售办事处/分销商联系,以了解供货情况与技术规格. VIN -0.5 V 至7VFB 电压 -0.5 V 至3VEN 电压 -0.5 V 至7VSW 电压 -0.5 V 至7VESD 敏感度

2 kV 结温(注2) 150℃ 贮存温度 -65℃ 至+150℃ 如需了解焊接规范,可通过以下网址参阅产品文件夹: www.national.com 和www.national.com/ms/MS/MS-SOLDERING.pdf 工作额定值 VIN

3 V 至5.5 V 结温 -40℃ 至+125℃ 电特性 (注3)、(注4) 在 条件 栏中,除非另有说明,否则 VIN =

5 V.采用标准字体表示的规格仅适用于 TJ = 25℃ 的温度条 件;

采用粗体字表示的极限值适用于 -40℃ 至+125℃ 的结温 (TJ) 范围.表中给出的 最小 和 最大 规格限值由测试、设计或统计 相关来保证.典型值代表 TJ = 25℃ 条件下最可能采用的参数标准,这里仅供参考. 符号 参数 条件 最小值 典型值 最大值 单位 VFB 反馈电压 0.588 0.600 0.612 V ΔVFB / VIN 反馈电压调节 VIN =

3 V 至5V0.02 %/V IB 反馈输入偏置电流 0.1

100 nA UVLO 欠压闭锁 VIN 逐渐上升 2.73 2.90 V VIN 逐渐下降 1.85 2.3 UVLO 迟滞 0.43 V FSW 开关频率 LMR10510-X 1.2 1.6 1.95 MHz LMR10510-Y 2.25 3.0 3.75 DMAX 最大占空比 LMR10510-X

86 94 % LMR10510-Y

82 90 DMIN 最小占空比 LMR10510-X

5 % LMR10510-Y

7 RDS(ON) 接通电阻 LLP-6 封装

150 mΩ SOT23-5 封装

130 195 ICL 开关电流限值 VIN = 3.3 V 1.2 1.75 A VEN_TH 关断门限电压 0.4 V 使能门限电压 1.8 ISW 开关漏电流

100 nA IEN 使能引脚电流 灌/拉100 nA IQ 静态电流(开关操作 时) LMR10510X VFB = 0.55 3.3

5 mA LMR10510Y VFB = 0.55 4.3 6.5 mA 静态电流(关断时) 所有选项 VEN =

0 V

30 nA Symbol Parameter Conditions Min Typ Max Units θJA Junction to Ambient

0 LFPM Air Flow (Note 5) LLP-6 Package

80 °C/W SOT23-5 Package

118 θJC Junction to Case LLP-6 Package

18 °C/W SOT23-5 Package

80 TSD Thermal Shutdown Temperature

165 °C Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Range indicates conditions for which the device is intended to be functional, but does not guarantee specfic performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: Thermal shutdown will occur if the junction temperature exceeds the maximum junction temperature of the device. Note 3: Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate National'

s Average Outgoing Quality Level (A........