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LM20134MHX Scheda tecnica(PDF) 1 Page - Texas Instruments |
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LM20134MHX Scheda tecnica(HTML) 1 Page - Texas Instruments |
1 / 31 page PVIN SW AGND FB PGOOD EN SS/TRK AVIN COMP LM20134 L RF VCC PGND CIN RC1 CC1 VIN CSS CVCC COUT VOUT RFB2 RFB1 CF (optional) SYNC LM20134, LM20134Q www.ti.com SNVS527G – OCTOBER 2007 – REVISED MARCH 2013 LM20134/LM20134Q 4A, PowerWise® Synchronous Buck Regulator with Input Synchronization Check for Samples: LM20134, LM20134Q 1 FEATURES DESCRIPTION The LM20134 is a full featured synchronous buck 2 • LM20134Q is AEC-Q100 Qualified and regulator capable of delivering up to 4A 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 Output Voltage Down to 0.8V to be tightly controlled and sequenced. Start-up • Adjustable Soft-Start with External Capacitor inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault • Precision Enable Pin with Hysteresis detection and supply sequencing is possible with the • Integrated OVP, UVLO, Power Good and integrated power good circuit. Thermal Shutdown The switching frequency of the LM20134 can be • HTSSOP 16-Pin Exposed Pad Package synchronized to an external clock by use of the SYNC pin. The SYNC pin is capable of synchronizing APPLICATIONS to input signals ranging from 500 kHz to 1.5 MHz • Simple to Design, High Efficiency Point of The LM20134 is designed to work well in multi-rail Load Regulation from a 5V or 3.3V Bus power supply architectures. The output voltage of the • High Performance DSPs, FPGAs, ASICs and device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20134 is Microprocessors pre-biased at startup it will not sink current to pull the • Broadband, Networking and Optical output low until the internal soft-start ramp exceeds Communications Infrastructure 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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