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LM20123MHE bảng dữ liệu(PDF) 1 Page - Texas Instruments |
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LM20123MHE bảng dữ liệu(HTML) 1 Page - Texas Instruments |
1 / 29 page PVIN SW AGND FB PGOOD EN SS/TRK AVIN COMP LM20123 L RF VCC PGND CIN RC1 CC1 VIN CSS CVCC COUT VOUT RFB2 RFB1 CF (optional) LM20123 www.ti.com SNVS524E – OCTOBER 2007 – REVISED MARCH 2013 LM20123/LM20123Q 3A, 1.5MHz PowerWise® Synchronous Buck Regulator Check for Samples: LM20123 1 FEATURES DESCRIPTION The LM20123 is a full featured 1.5 MHz synchronous 2 • LM20123Q is AEC-Q100 Qualified and buck regulator capable of delivering up to 3A of Manufactured on an Automotive Grade Flow continuous output current. The current mode control • Input Voltage Range 2.95V to 5.5V loop can be compensated to be stable with virtually • Accurate Current Limit Minimizes Inductor any type of output capacitor. For most cases, compensating the device only requires two external Size components, providing maximum flexibility and ease • 96% Efficiency with 1.5 MHz Switching of use. The device is optimized to work over the input Frequency voltage range of 2.95V to 5.5V making it suited for a • 32 m Ω Integrated FET Switches wide variety of low voltage systems. • Starts up into Pre-Biased Loads The device features internal over voltage protection • Output Voltage Tracking (OVP) and over current protection (OCP) circuits for 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 LM20123 is designed to work well in multi-rail • HTSSOP (16-Pins) Exposed Pad Package power supply architectures. The output voltage of the device can be configured to track a higher voltage rail APPLICATIONS using the SS/TRK pin. If the output of the LM20123 is • Simple to Design, High Efficiency Point of pre-biased at startup it will not sink current to pull the Load Regulation from a 5V or 3.3V Bus output low until the internal soft-start ramp exceeds the voltage at the feedback pin. • High Performance DSPs, FPGAs, ASICs and Microprocessors The LM20123 is offered in a 16-pin HTSSOP package with an exposed pad that can be soldered to • Broadband, Networking and Optical the PCB, eliminating the need for bulky heatsinks. Communications Infrastructure 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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