BOOT PGND P A GOOD GND EN fSW SiC461, SiC462, SiC463, SiC464 www.vishay.com Vishay Siliconix 4.5 V to 60 V Input, 2 A, 4 A, 6 A, 10 A microBUCK DC/DC Converter FEATURES Versatile - Single supply operation from 4.5 V to 60 V input voltage - Adjustable output voltage down to 0.8 V - Scalable solution 2 A (SiC464), 4 A (SiC463), 6 A (SiC462), 10 A (SiC461) - Output voltage tracking and sequencing with pre-bias start up - 1 % output voltage accuracy at -40 C to +125 C Highly efficient LINKS TO ADDITIONAL RESOURCES - 98 % peak efficiency - 4 A supply current at shutdown - 235 A operating current, not switching Design Tool Evaluation Design Tools Boards Highly configurable - Adjustable switching frequency from 100 kHz to 2 MHz DESCRIPTION - Adjustable soft start and adjustable current limit The SiC46x is a family of wide input voltage, high efficiency - 3 modes of operation, forced continuous conduction, power save or ultrasonic synchronous buck regulators with integrated high side and low side power MOSFETs. Its power stage is capable of Robust and reliable supplying high continuous current at up to 2 MHz switching - Output over voltage protection frequency. This regulator produces an adjustable output - Output under voltage / short circuit protection with auto retry voltage down to 0.8 V from 4.5 V to 60 V input rail t o accommodate a variety of applications, includin g - Power good flag and over temperature protection computing, consumer electronics, telecom, and industrial. - Supported by Vishay PowerCAD online design simulation SiC46xs architecture allows for ultrafast transient response Material categorization: for definitions of compliance with minimum output capacitance and tight ripple regulation please see www.vishay.com/doc 99912 at very light load. The device enables loop stability regardless of the type of output capacitor used, including APPLICATIONS low ESR ceramic capacitors. The device also incorporates a Industrial and automation power saving scheme that significantly increases light load Home automation efficiency. The regulator integrates a full protection featur e Industrial and server computing set, including over current protection (OCP), output Networking, telecom, and base station power supplies overvoltage protection (OVP), short circuit protection (SCP), Unregulated wall transformer output undervoltage protection (UVP) and over temperatur e Robotics protection (OTP). It also has UVLO for input rail and a user High end hobby electronics: remote control cars, planes, programmable soft start. and drones The SiC46x family is available in 2 A, 4 A, 6 A, 10 A pin Battery management systems compatible 5 mm by 5 mm lead (Pb)-free power enhanced Power tools MLP55-27L package. Vending, ATM, and slot machines TYPICAL APPLICATION CIRCUIT 100 10000 = 24 V, V = 12 V V OUT IN V = 48 V, V = 12 V IN OUT 98 96 94 C BOOT 1000 INPUT V CIN 4.5 VDC to 60 VDC PHASE 92 V OUT V SW IN 90 VDD V = 24 V, V = 5 V C Rx IN OUT IN Cx SiC46x V VDRV SNS 88 Cy R MODE ULTRASONIC up V = 48 V, V = 5 V IN OUT 100 SS V FB COUT 86 ILIMIT COMP R C down ss R comp 84 R limit C 82 comp R fsw 80 10 0123456 I - Output Current (A) OUT Fig. 1 - Typical Application Circuit for SiC46x Fig. 2 - SiC462 Efficiency vs. Output Current S21-1142-Rev. P, 29-Nov-2021 Document Number: 65124 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 2nd line eff - Efficiency (%) 1st line 2nd lineSiC461, SiC462, SiC463, SiC464 www.vishay.com Vishay Siliconix PIN CONFIGURATION 1 V 1 V 1 CIN 19 SS SS 19 CIN 18 ULTRASONIC ULTRASONIC 1 8 28 AGND 28 A P 2 2 P GND GOOD GOOD P 17 17 P GND GND EN 3 EN 3 V 16 16 V DRV DRV BOOT 4 BOOT 4 15 GL GL 15 29 30 14 SW SW 14 PHASE VIN 29 PGND 30 P V 5 5 PHASE GND IN 13 SW SW 13 6 6 PHASE 6 PHASE 6 12 SW SW 12 Fig. 3 - SiC46x Pin Configuration PIN DESCRIPTION PIN NUMBER SYMBOL DESCRIPTION Supply voltage for internal regulators V and V . This pin should be tied to V , but can also be DD DRV IN 1V CIN connected to a lower supply voltage (> 5 V) to reduce losses in the internal linear regulators Open-drain power good indicator - high impedance indicates power is good. An external pull-up 2P GOOD resistor is required Enable pin. Tie high/low to enable/disable the IC accordingly. This is a high voltage compatible pin, 3EN can be tied to 60 V 4 BOOT High side driver bootstrap voltage 5, 6 PHASE Return path of high side gate driver 7, 8, 29 V Power stage input voltage. Drain of high side MOSFET IN 9, 10, 11, 17, 30 P Power ground GND 12, 13, 14 SW Power stage switch node 15 GL Low side MOSFET gate signal Supply voltage for internal gate driver. When using the internal LDO as a bias power supply, V is DRV 16 V DRV the LDO output. Connect a 4.7 F decoupling capacitor to P GND Float to disable ultrasonic mode, connect to V to enable. Depending on the operation mode set by DD 18 ULTRASONIC the mode pin, power save mode or forced continuous mode will be enabled when the ultrasonic mode is disabled Set the soft start ramp by connecting a capacitor to A . An internal current source will charge the GND 19 SS capacitor 20 V Power inductor signal feedback pin for system stability compensation SNS Output of the internal error amplifier. The feedback loop compensation network is connected from 21 COMP this pin to the A pin GND Feedback input for switching regulator used to program the output voltage - connect to an external 22 V FB resistor divider from V to A OUT GND 23, 28 A Analog ground GND 24 f Set the on-time by connecting a resistor to A SW GND 25 I Set the current limit by connecting a resistor to A LIMIT GND 26 V Bias supply for the IC. V is an LDO output, connect a 1 F decoupling capacitor to A DD DD GND 27 MODE Set various operation modes by connecting a resistor to A . See specification table for details GND S21-1142-Rev. P, 29-Nov-2021 Document Number: 65124 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 MODE 27 V 7 IN 26 V DD V 8 IN 25 I LIM f 24 SW A P 9 23 GND GND 22 V P 10 FB GND 21 COMP P 11 GND 20 V SNS 20 V SNS P 11 21 COMP GND P 10 22 V GND FB P 9 23 A GND GND 24 f SW 25 I LIM V 8 IN 26 V DD V 7 IN 27 MODE