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LM5166 Datasheet(PDF) 1 Page - Texas Instruments |
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LM5166 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 57 page  Load (mA) 0.01 0.1 1 10 100 500 30 40 50 60 70 80 90 100 D001 VIN = 8V VIN = 12V VIN = 24V VIN = 36V VIN = 65V VOUT = 5 V SW VOUT HYS VIN EN SS GND RT PGOOD ILIM LM5166X COUT 47 PF CIN 2.2 PF VIN = 3 V...65 V IOUT = 0.5 A LF 150 PH RRT RESR 0.5 : *VOUT tracks VIN if VIN < 5.5 V Copyright © 2017, Texas Instruments Incorporated Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LM5166 SNVSA67B – DECEMBER 2016 – REVISED JUNE 2017 LM5166 3-V to 65-V Input, 500-mA Synchronous Buck Converter With Ultra-Low IQ 1 1 Features 1 • Wide Input Voltage Range of 3 V to 65 V • 9.7-µA No-Load Quiescent Current • –40°C to 150°C Junction Temperature Range • Fixed (3.3-V, 5-V) or Adjustable VOUT Options • Meets EN55022 / CISPR 22 EMI Standards • Integrated 1-Ω PFET Buck Switch – Supports 100% Duty Cycle for Low Dropout • Integrated 0.5-Ω NFET Synchronous Rectifier – Eliminates External Schottky Diode • Programmable Peak Current Limit Supports: – 500-mA, 300-mA, or 200-mA Loads • Selectable PFM or COT Mode Operation • 1.223-V ±1.2% Internal Voltage Reference • Switching Frequency up to 600 kHz • 900-µs Internal or Externally-Adjustable Soft Start • Diode Emulation and Pulse Skipping for Ultra- High Light-Load Efficiency • No Loop Compensation or Bootstrap Components • Precision Enable and Input UVLO With Hysteresis • Open-Drain Power Good Indicator • Thermal Shutdown Protection With Hysteresis • Pin-to-Pin Compatible With the LM5165 • 10-Pin, 3-mm × 3-mm VSON Package • Create a Custom Regulator Design Using WEBENCH® Power Designer 2 Applications • Factory and Building Automation • Automotive and Battery-Powered Applications • High Voltage LDO Replacement • Low Power Bias Supplies 3 Description 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. Device Information(1) PART NUMBER OUTPUT PACKAGE LM5166 Adjustable VSON (10) LM5166X 5-V fixed LM5166Y 3.3-V fixed (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical COT Mode Application Typical COT Mode Application Efficiency |
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