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LM20124-Q1 Arkusz danych(PDF) 1 Page - Texas Instruments |
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LM20124-Q1 Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 28 page PVIN SW AGND FB PGOOD EN SS/TRK AVIN COMP LM20124 L RF VCC PGND CIN RC1 CC1 VIN CSS CVCC COUT VOUT RFB2 RFB1 CF (optional) LM20124, LM20124-Q1 www.ti.com SNVS507F – OCTOBER 2007 – REVISED MARCH 2013 4A, 1MHz PowerWise® Synchronous Buck Regulator Check for Samples: LM20124, LM20124-Q1 1 FEATURES DESCRIPTION 2 • LM20124-Q1 is AEC-Q100 qualified and The LM20124 is a full featured 1 MHz synchronous manufactured on an Automotive Grade Flow buck regulator capable of delivering up to 4A of • Input voltage range 2.95V to 5.5V continuous output current. The current mode control • Accurate current limit minimizes inductor size loop can be compensated to be stable with virtually any type of output capacitor. For most cases, • 96% efficiency at 1 MHz switching frequency compensating the device only requires two external • 32 m Ω integrated FET switches components, providing maximum flexibility and ease • Starts up into pre-biased loads of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suited for a • Output voltage tracking wide variety of low voltage systems. • Peak current mode control The device features internal over voltage protection • Adjustable output voltage down to 0.8V (OVP) and over current protection (OCP) circuits for • Adjustable Soft-Start with external capacitor increased system reliability. A precision enable pin • Precision enable pin with hysteresis and integrated UVLO allows the turn-on of the device to be tightly controlled and sequenced. Start-up • Integrated OVP, UVLO, power good and inrush currents are limited by both an internally fixed thermal shutdown and externally adjustable Soft-Start circuit. Fault • TSSOP 16 pin exposed pad package detection and supply sequencing is possible with the integrated power good circuit. APPLICATIONS The LM20124 is designed to work well in multi-rail • Simple to design, high efficiency point of load power supply architectures. The output voltage of the 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 LM20124 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 LM20124 is offered in a 16-pin TSSOP package with an exposed pad 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. |
Podobny numer części - LM20124-Q1 |
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Podobny opis - LM20124-Q1 |
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