LM5166/-Q1 3.5V 到 60V 输入、500mA 输出同步降压转换器 - LM5166

LM5166 (正在供货)

LM5166/-Q1 3.5V 到 60V 输入、500mA 输出同步降压转换器

  1. LM5166 3-V to 65-V Input, 500-mA Synchronous Buck Converter With Ultra-Low IQ 数据表   (英文內容)
  1. 描述与参数
  2. 在线数据表
  3. 技术文档
  4. 工具与软件
  5. 立即订购
  6. 比较
  7. 质量与封装
  8. 支持与培训
  1. 描述
  2. 特性
  3. 参数
  4. 方框图
  5. 相关终端应用
  6. 伴随产品


The LM5166 is a compact, easy-to-use, 3-V to 65-V, ultra-low IQ synchronous buck converter with high efficiency over wide input voltage and load current ranges. With integrated high-side and low-side power MOSFETs, up to 500 mA of output current can be delivered at fixed output voltages of 3.3 V or 5 V, or an adjustable output. The converter is designed to simplify implementation while providing options to optimize the performance for the target application. Pulse frequency modulation (PFM) mode is selected for optimal light-load efficiency or constant on-time (COT) control for nearly constant operating frequency. Both control schemes do not require loop compensation while providing excellent line and load transient response and short PWM on-time for large step-down conversion ratios.The high-side P-channel MOSFET can operate at 100% duty cycle for lowest dropout voltage and does not require a bootstrap capacitor for gate drive. Also, the current limit setpoint is adjustable to optimize inductor selection for a particular load current requirement. Selectable and adjustable start-up timing options include minimum delay (no soft start), internally fixed (900 µs), and externally programmable soft start using a capacitor. An open-drain PGOOD indicator can be used for sequencing, fault reporting, and output voltage monitoring. The LM5166 is available in a 10-pin VSON package with 0.5-mm pin pitch.


  1. Wide Input Voltage Range of 3 V to 65 V
  2. 9.7-µA No-Load Quiescent Current
  3. –40°C to 150°C Junction Temperature Range
  4. Fixed (3.3-V, 5-V) or Adjustable VOUT Options
  5. Meets EN55022 / CISPR 22 EMI Standards
  6. Integrated 1-Ω PFET Buck Switch
    1. Supports 100% Duty Cycle for Low Dropout
  7. Integrated 0.5-Ω NFET Synchronous Rectifier
    1. Eliminates External Schottky Diode
  8. Programmable Peak Current Limit Supports:
    1. 500-mA, 300-mA, or 200-mA Loads
  9. Selectable PFM or COT Mode Operation
  10. 1.223-V ±1.2% Internal Voltage Reference
  11. Switching Frequency up to 600 kHz
  12. 900-µs Internal or Externally-Adjustable Soft Start
  13. Diode Emulation and Pulse Skipping for Ultra-High Light-Load Efficiency
  14. No Loop Compensation or Bootstrap Components
  15. Precision Enable and Input UVLO With Hysteresis
  16. Open-Drain Power Good Indicator
  17. Thermal Shutdown Protection With Hysteresis
  18. Pin-to-Pin Compatible With the LM5165
  19. 10-Pin, 3-mm × 3-mm VSON Package
  20. Create a Custom Regulator Design Using WEBENCH® Power Designer
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参数 与其它产品相比 降压转换器 (集成开关)

Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Package Group
LM5166 LM25011 LM5017 LM5018 LM5165
3    6    7.5    7.5    3   
65    42    100    100    65   
1.23    2.51    1.25    1.25    1.23   
65    40    90    90    65   
0.5    2    0.65    0.3    0.15   
1    1    1    1    1   
50    50    50    50    50   
600    2000    1000    1000    600   
0.01    1.2    1.75    1.75    0.01   
Adjustable Current Limit
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable   
Adjustable Current Limit    Synchronous Rectification
UVLO Adjustable   
Synchronous Rectification
UVLO Adjustable   
Adjustable Current Limit
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable   
Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)   
100    99    90    90    100   
-40 to 150    -40 to 125    -40 to 125    -40 to 125    -40 to 150   
Catalog    Catalog    Catalog    Catalog    Catalog   
VSON    MSOP-PowerPAD    SO PowerPAD

WEBENCH® Designer LM5166

Part Number
  Min   Max Range
Vin  V 3.0 to 65V
Vout  V 1.223 to 60V
Iout  A 0.5A
Ambient Temp  °C -40 to 150°C