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LM20154 Folha de dados(PDF) 1 Page - Texas Instruments |
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LM20154 Folha de dados(HTML) 1 Page - Texas Instruments |
1 / 31 page PVIN SW AGND FB PGOOD EN SS/TRK AVIN COMP LM20154 L RF VCC PGND CIN RC1 CC1 VIN CSS CVCC COUT VOUT RFB2 RFB1 CF SYNCOUT (optional) RS SYNCOUT LM20154 www.ti.com SNVS531G – OCTOBER 2007 – REVISED MARCH 2013 LM20154/LM20154-Q1 4A, 1MHz Synchronous Buck Regulator with SYNCOUT Check for Samples: LM20154 1 FEATURES DESCRIPTION The LM20154 is a full featured 1 MHz synchronous 2 • LM20154-Q1 is AEC-Q100 Qualified and buck regulator capable of delivering up to 4A 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% Peak Efficiency at 1.0 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 • Frequency Synchronization Output wide variety of low voltage systems. • 32 m Ω Integrated FET Switches The device features internal over voltage protection • Starts up into Pre-Biased Loads (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin • Output Voltage Tracking and integrated UVLO allows the turn on of the device • Peak Current Mode Control to be tightly controlled and sequenced. Start-up • Adjustable Output Voltage Down to 0.8V inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault • Adjustable Soft-Start with External Capacitor detection and supply sequencing is possible with the • Precision Enable Pin with Hysteresis integrated power good circuit. • Integrated OVP, UVLO, Power Good and The LM20154 features an open drain SYNCOUT pin Thermal Shutdown which provides an external clock that matches the • HTSSOP Exposed Pad Package switching frequency of the device but is shifted by 180 degrees. APPLICATIONS The LM20154 is designed to work well in multi-rail • Simple to Design, High Efficiency Point of power supply architectures. The output voltage of the Load Regulation from a 5V or 3.3V Bus device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20154 is • High Performance DSPs, FPGAs, ASICs and pre-biased at startup it will not sink current to pull the Microprocessors output low until the internal soft-start ramp exceeds • Broadband, Networking and Optical the voltage at the feedback pin. Communications Infrastructure The LM20154 is offered in an exposed pad 16-pin HTSSOP package that can be soldered to the PCB, eliminating the need for bulky heatsinks. 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. |
Nº de peça semelhante - LM20154_15 |
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Descrição semelhante - LM20154_15 |
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