Product Brief TLF51801ELV DC/DC Buck Controller The TLF51801 is an AEC-qualified high current buck-controller providing an adjustable At a Glance output voltage. The controller is capable to drive external power MOSFETs for load currents up to 10A. The current limitation can be realized either by sensing an external Key Features shunt resistor or by sensing the R of the HS-switch reducing external components. Driving FETs for loads up to 10A DS(on) Very low drop-out operation is achieved by a maximum duty-cycle of more than 99%. Adjustable switching frequency The adjustable switching frequency in the range of 100 to 700kHz can be synchronized can be synchronized to an to an external clock. An Enable-feature allows very low shutdown current consumption. external clock TLF51801 is coming in a small, thermal enhanced SSOP-14 exposed-pad package Very low shut-down current (RoHS). Internal soft-start Protection functions PG-SSOP-14 EP AEC-qualified Key Benefits Flexibility in current limitation to reduce external components Integrated soft-start limits the current peak as well as voltage overshoot at startup Application Automotive Pre-Regulator General purpose: high-current applications www.infineon.com/dcdc-converterProduct Brief TLF51801ELV DC/DC Buck Controller Application Diagram: Current Limitation via R -sense DS(on) C DBOOT IVCC V S R Sense Sensehigh IVCC C C C IN1 IN2 IN V ls 1) VS LDO Senselow EN EN Enable Soft Start BTS GND C Temp SD BTS UG High SYNC/FREQ Osc Sync L 1 BUO V CC COMP Step Down V ls Regulator FB LG Low D1 C C OUT1 OUT2 PGND TLF51801ELV GND GND R R C F 1 L R C FREQ CF C F R 2 1) Parts suggested for suppression of EME 2) Parts in grey are not mandatory Application Diagram: Current Limitation via Shunt-sense C DBOOT IVCC V S R Sense IVCC Sensehigh C C C V IN1 IN2 IN ls 1) R VS shunt LDO Senselow EN EN Enable Soft Start BTS GND C BTS Temp SD UG High SYNC/FREQ Osc Sync L 1 BUO V CC COMP Step Down V Regulator ls FB LG Low C C D1 OUT1 OUT2 PGND TLF51801ELV GND GND R R C F 1 L R C FREQ CF C F R 2 1) Parts suggested for suppression of EME 2) Parts in grey are not mandatory Published by Attention please Warnings Infineon Technologies AG The information given in this document shall in no event Due to technical requirements components may contain 85579 Neubiberg, Germany be regarded as a guarantee of conditions or characteristics dangerous substances. For information on the types in (Beschaffenheitsgarantie). With respect to any examples question please contact your nearest Infineon Technolo- 2013 Infineon Technologies AG. or hints given herein, any typical values stated herein and/ gies Office. Infineon Technologies Components may only All Rights Reserved. or any information regarding the application of the device, be used in life-support devices or systems with the express Infineon Technologies hereby disclaims any and all warran- written approval of Infineon Technologies, if a failure of Visit us: ties and liabilities of any kind, including without limitation such components can reasonably be expected to cause www.infineon.com warranties of non-infringement of intellectual property the failure of that life-support device or system, or to affect rights of any third party. the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted Information in the human body, or to support and/or maintain and For further information on technology, delivery terms and sustain and/or protect human life. If they fail, it is reason- Order Number: B124-H9827-X-X-7600 conditions and prices please contact your nearest Infineon able to assume that the health of the user or other persons Date: 08 / 2013 Technologies Office (www.infineon.com). may be endangered.