SiC414, SiC424 www.vishay.com Vishay Siliconix 6 A, microBUCK SiC414, SiC424 Integrated Buck Regulator with 5 V LDO FEATURES High efficiency > 95 % 6 A continuous output current capability Integrated bootstrap switch Integrated 5 V / 200 mA LDO with bypass logic Temperature compensated current limit Pseudo fixed-frequency adaptive on-time control All ceramic solution enabled Programmable input UVLO threshold DESCRIPTION Independent enable pin for switcher and LDO The Vishay Siliconix SiC414 and SiC424 are an advanced Selectable ultrasonic power-save mode (SiC414) stand-alone synchronous buck regulator featuring Selectable power-save mode (SiC424) integrated power MOSFETs, bootstrap switch, and an Internal soft-start and soft-shutdown internal 5 V in a space-saving PowerPAK LDO 1 % internal reference voltage MLP28-44GW package. Power good output and over voltage protection The SiC414 and SiC424 are capable of operating with all ceramic solutions and switching frequencies up to 1 MHz. PowerCAD Simulation software available at The programmable frequency, synchronous operation an d www.vishay.com/power-ics/powercad-list/ selectable power-save allow operation at high efficiency Material categorization: for definitions of compliance across the full range of load current. The internal LDO may please see www.vishay.com/doc 99912 be used to supply 5 V for the gate drive circuits or it may be bypassed with an external 5 V for optimum efficiency and APPLICATIONS used to drive external n-channel MOSFETs or other loads. Notebook, desktop, and server computers Additional features include cycle-by-cycle current limit, Digital HDTV and digital consumer applications voltage soft-start, under voltage protection, programmable Networking and telecommunication equipment over current protection, soft shutdown, and selectable power-save. The Vishay Siliconix SiC414 and SiC424 also Printers, DSL, and STB applications provides an enable input and a power good output. Embedded applications Point of load power supplies PRIMARY CHARACTERISTICS TYPICAL APPLICATION CIRCUIT AND Input voltage range 3 V to 28 V PACKAGE OPTION Output voltage range 0.75 V to 5.5 V LDO EN EN/PSV (Tri-State) Operating frequency 200 kHz to 1 MHz 3.3 V VOUT Continuous output current 6 A P GOOD Peak efficiency 95 % 28 27 26 25 24 23 22 VOUT Package PowerPAK MLP28-44GW 1 FB LX 21 2 V5V LX 20 PAD1 A GND 3 AGND 19 PGND PAD3 4 VOUT 18 PGND VIN LX PAD2 5 VIN 17 PGND V IN V P 6 LDO GND 16 BST 15 7 LX 8 9 10 11 12 13 14 S20-0483-Rev. D, 29-Jun-2020 Document Number: 63388 1 For technical questions, contact: powerictechsupport vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc 91000 V ENL IN V IN TON V A IN GND VIN EN/PSV LX LX P GND ILIM P GND PGOODSiC414, SiC424 www.vishay.com Vishay Siliconix PIN CONFIGURATION (top view) 28 27 26 25 24 23 22 FB 1 21 PAD1 LX 20 V5V 2 LX A GND A 3 PAD3 19 P GND GND V 4 18 P OUT GND LX P PAD2 17 GND V 5 IN V 6 16 P LDO GND V IN 7 15 LX BST PIN DESCRIPTION PIN NUMBER SYMBOL DESCRIPTION Feedback input for switching regulator used to program the output voltage - connect to an external 1FB resistor divider from V to A OUT GND Bias input for internal analog circuits and gate drives - connect to external 3 V or 5 V supply or bias 2V5V connection to V LDO 3, 26, PAD 1 A Analog ground GND 4V Switcher output voltage sense pin, and also the input to the internal switch-over between V and V OUT OUT LDO 5, 8 to 11, PAD 2 V Input supply voltage IN 6V 5 V LDO output LDO Bootstrap pin - connect a capacitor from BST to LXBST to develop the floating supply for the high side 7BST gate drive 12 LXBST LX Boost - connect to the BST capacitor 15, 20, 21, PAD 3 LX Switching (Phase) node 13, 14, 16 to 19 P Power ground GND Open-drain power good indicator. High impedance indicates power is good. An external pull-up resistor 22 P GOOD is required 23 I Current limit sense pin - used to program the current limit by connecting a resistor from I to LXS LIM LIM 24 LXS LX sense - connect to R resistor ILIM Enable / power save input for the switching regulator - connect to A to disable the switching regulator. GND Float to operate in forced continuous mode (power save disabled). 25 EN / PSV For SiC414, connect to V5V to operate with ultrasonic power save mode enabled. For SiC424, connect to V5V to operate with power save mode enabled with no minimum frequency 27 t On-time programming input - set the on-time by connecting through a resistor to A ON GND Enable input for the LDO - connect ENL to A to disable the LDO. Drive with logic to +3 V for logic GND 28 ENL control, or program the V UVLO with a resistor divider between V , ENL, and A IN IN GND ORDERING INFORMATION PART NUMBER PACKAGE SiC414CD-T1-GE3 PowerPAK MLP28-44GW SiC424CD-T1-GE3 PowerPAK MLP28-44GW SiC414DB Reference board S20-0483-Rev. D, 29-Jun-2020 Document Number: 63388 2 For technical questions, contact: powerictechsupport vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc 91000 8 V IN ENL 9 V IN TON 10 A V GND IN 11 V EN/PSV IN LX 12 LX 13 P GND I LIM 14 P P GND GOOD