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LM20133Q bảng dữ liệu(PDF) 1 Page - Texas Instruments |
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LM20133Q bảng dữ liệu(HTML) 1 Page - Texas Instruments |
1 / 29 page PVIN SW AGND FB PGOOD EN SS/TRK AVIN COMP LM20133 L RF VCC PGND CIN RC1 CC1 VIN CSS CVCC COUT VOUT RFB2 RFB1 CF (optional) SYNC LM20133, LM20133Q www.ti.com SNVS526F – OCTOBER 2007 – REVISED MARCH 2013 3A, PowerWise® Synchronous Buck Regulator with Input Synchronization Check for Samples: LM20133, LM20133Q 1 FEATURES DESCRIPTION The LM20133 is a full featured synchronous buck 2 • LM20133Q is AEC-Q100 Qualified and regulator capable of delivering up to 3A of continuous Manufactured on an Automotive Grade Flow output current. The current mode control loop can be • Input Voltage Range 2.95V to 5.5V compensated to be stable with virtually any type of • Accurate Current Limit Minimizes Inductor output capacitor. For most cases, compensating the device only requires two external components, Size providing maximum flexibility and ease of use. The • 97% Peak Efficiency device is optimized to work over the input voltage • Frequency Synchronization Pin range of 2.95V to 5.5V making it suited for a wide • 32 m Ω Integrated FET Switches variety of low voltage systems. • Starts up into Pre-Biased Loads The device features internal over voltage protection (OVP) and over current protection (OCP) circuits for • Output Voltage Tracking increased system reliability. A precision enable pin • Peak Current Mode Control and integrated UVLO allows the turn on of the device • Adjustable Soft-Start with External Capacitor to be tightly controlled and sequenced. Start-up • Precision Enable Pin with Hysteresis inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault • Integrated OVP, UVLO, Power Good and detection and supply sequencing is possible with the Thermal Shutdown integrated power good circuit. • HTSSOP 16-Pin Exposed Pad Package The switching frequency of the LM20133 can be synchronized to an external clock by use of the APPLICATIONS SYNC pin. The SYNC pin is capable of synchronizing • Simple to Design, High Efficiency Point of to input signals ranging from 500 kHz to 1.5 MHz. Load Regulation from a 5V or 3.3V bus The LM20133 is designed to work well in multi-rail • High Performance DSPs, FPGAs, ASICs and power supply architectures. The output voltage of the Microprocessors device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20133 is • Broadband, Networking and Optical pre-biased at startup it will not sink current to pull the Communications Infrastructure output low until the internal soft-start ramp exceeds the voltage at the feedback pin. Typical Application Circuit 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2007–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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