4.5 V to 60 V Input, 2 A, 4 A, 6 A, 10 A microBUCK DC/DC ...

1 SiC461, SiC462, SiC463, Siliconix S18-0938-Rev. M, 17-Sep-20181 Document Number: 65124 For technical questions, contact: DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT V to 60 V Input, 2 A, 4 A, 6 A, 10 AmicroBUCK DC/DC ConverterDESCRIPTIONThe SiC46x is a family of wide input voltage, high efficiency synchronous buck regulators with integrated high side and low side power MOSFETs. Its power stage is capable of supplying high continuous current at up to 2 MHz switching frequency. This regulator produces an adjustable output voltage down to V from V to 60 V input rail to accommodate a variety of applications, including computing, consumer electronics, telecom, and industrial. SiC46x s architecture allows for ultrafast transient response with minimum output capacitance and tight ripple regulation at very light load. The device enables loop stability regardless of the type of output capacitor used, including low ESR ceramic capacitors.

2 The device also incorporates a power saving scheme that significantly increases light load efficiency. The regulator integrates a full protection feature set, including over current protection (OCP), output overvoltage protection (OVP), short circuit protection (SCP), output undervoltage protection (UVP) and over temperature protection (OTP). It also has UVLO for input rail and a user programmable soft SiC46x family is available in 2 A, 4 A, 6 A, 10 A pin compatible 5 mm by 5 mm lead (Pb)-free power enhanced MLP55-27L package. TYPICAL APPLICATION CIRCUIT Fig. 1 - Typical Application Circuit for SiC46xFEATURES Versatile- Single supply operation from V to 60 V input voltage- Adjustable output voltage down to 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- 98 % peak efficiency- 4 A supply current at shutdown- 235 A operating current, not switching Highly configurable- Adjustable switching frequency from 100 kHz to 2 MHz- Adjustable soft start and adjustable current limit- 3 modes of operation, forced continuous conduction, power save or ultrasonic Robust and reliable- Output over voltage protection- Output under voltage / short circuit protection with auto retry- Power good flag and over temperature protection- Supported by vishay PowerCAD online design simulation Design support tools- PowerCAD online design simulation ( )

3 - External component calculator ( )- Schematic, design, BOM, and gerber files ( ) Material categorization: for definitions of compliance please see Industrial and automation Home automation Industrial and server computing Networking, telecom, and base station power supplies Unregulated wall transformer Robotics High end hobby electronics: remote control cars, planes, and drones Battery management systems Power tools Vending, ATM, and slot machines Fig. 2 - SiC462 Efficiency vs. Output VDC to 60 VDCRupRdownSiC46x10100100010000808284868 890929496981000123456 Axis Title1st line2nd line2nd lineeff - Efficiency (%)IOUT- Output Current (A)VIN= 48 V, VOUT= 5 VVIN= 24 V, VOUT= 5 VVIN= 48 V, VOUT= 12 VVIN= 24 V, VOUT= 12 VSiC461, SiC462, SiC463, Siliconix S18-0938-Rev. M, 17-Sep-20182 Document Number: 65124 For technical questions, contact: DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT CONFIGURATION Fig.

4 3 - SiC46x Pin ConfigurationPIN DESCRIPTIONPIN NUMBERSYMBOL DESCRIPTION1 VCINS upply voltage for internal regulators VDD and VDRV. This pin should be tied to VIN, but can also be connected to a lower supply voltage (> 5 V) to reduce losses in the internal linear regulators2 PGOODOpen-drain power good indicator - high impedance indicates power is good. An external pull-up resistor is required3 ENEnable pin. Tie high/low to enable/disable the IC accordingly. This is a high voltage compatible pin, can be tied to 60 V4 BOOTHigh side driver bootstrap voltage5, 6 PHASER eturn path of high side gate driver7, 8, 29 VINP ower stage input voltage. Drain of high side MOSFET9, 10, 11, 17, 30 PGNDP ower ground12, 13, 14 SWPower stage switch node15 GLLow side MOSFET gate signal16 VDRVS upply voltage for internal gate driver. When using the internal LDO as a bias power supply, VDRV is the LDO output. Connect a F decoupling capacitor to PGND18 ULTRASONICF loat to disable ultrasonic mode, connect to VDD to enable.

5 Depending on the operation mode set by the mode pin, power save mode or forced continuous mode will be enabled when the ultrasonic mode is disabled19 SSSet the soft start ramp by connecting a capacitor to AGND. An internal current source will charge the capacitor20 VSNSP ower inductor signal feedback pin for system stability compensation21 COMPO utput of the internal error amplifier. The feedback loop compensation network is connected from this pin to the AGND pin22 VFBF eedback input for switching regulator used to program the output voltage - connect to an external resistor divider from VOUT to AGND23, 28 AGNDA nalog ground24fSWSet the on-time by connecting a resistor to AGND25 ILIMITSet the current limit by connecting a resistor to AGND26 VDDBias supply for the IC. VDD is an LDO output, connect a 1 F decoupling capacitor to AGND27 MODESet various operation modes by connecting a resistor to AGND. See specification table for details6SS19 ULTRASONIC 1 8 PGND 17 VDRV 16GL 1 5SW 1 4SW 1 3SW 1 2 PGND 11 PGND 10 PGND 9 VIN 8 VIN 71 VCIN2 PGOOD3 EN4 BOOT5 PHASE6 PHASE20 VSNS 21 COMP 22 VFB 23 AGND 24 fSW25 ILIM26 VDD27 MODE 28 AGND29 VIN30 PGND19 SS18 ULTRASONIC 17 PGND 16 VDRV 15 GL 14 SW 13 SW 12 SW 12345627 26 25 24 23 22 VFB 21 COMP 20 VSNS 28 AGND30 VIN29 PGND PGND 11 PGND 10 PGND 9 VIN 8 VIN 716 MODEVDDILIMfSWAGNDVCINPGOODENBOOTPHASEPH ASESiC461, SiC462, SiC463, Siliconix S18-0938-Rev.

6 M, 17-Sep-20183 Document Number: 65124 For technical questions, contact: DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT MARKING INFORMATION Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating/conditions for extended periods may affect device INFORMATIONPART NUMBERPACKAGEMARKING CODESiC461ED-T1-GE3 PowerPAK MLP55-27 LSiC461 SiC461 EVBR eference boardSiC462ED-T1-GE3 PowerPAK MLP55-27 LSiC462 SiC462 EVBR eference boardSiC463ED-T1-GE3 PowerPAK MLP55-27 LSiC463 SiC463 EVBR eference boardSiC464ED-T1-GE3 PowerPAK MLP55-27 LSiC464 SiC464 EVBR eference boardABSOLUTE MAXIMUM RATINGS (TA = 25 C, unless otherwise noted)ELECTRICAL PARAMETER CONDITIONSLIMITSUNIT VCIN, VINR eference to to 66 VENR eference to to 60SW / PHASER eference to to 66 VDRVR eference to to 6 VDDR eference to to 6SW / PHASE (AC)Reference to PGND.

7 100 ns-10 to to VPHASE + VDRVAGND to to other pinsReference to to VDD + temperatureTJ-40 to +150 CStorage temperatureTSTG-65 to +150 Power DissipationThermal resistance from junction-to-ambient12 C/WThermal resistance from junction-to-case2 ESD ProtectionElectrostatic discharge protectionHuman body model, JESD22-A1142000 VCharged device model, JESD22-A101500=pin 1 indicatorP/N =part number code=Siliconix logo =ESD symbolF=assembly factory codeY=year codeWW =week codeLL=lot codeF Y W WP/NLLSiC461, SiC462, SiC463, Siliconix S18-0938-Rev. M, 17-Sep-20184 Document Number: 65124 For technical questions, contact: DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT (1)For input voltages below 5 V, provide a separate supply to VCIN of at least 5 V to prevent the internal VDD rail UVLO from triggeringRECOMMENDED OPERATING CONDITIONS (all voltages referenced to GND = 0 V)PARAMETER Input voltage (VIN) input voltage (VCIN) (1) (EN)0-60 Bias supply (VDD) supply voltage (VDRV) voltage (VOUT) x VINT emperatureRecommended ambient temperature-40 to +105 COperating junction temperature-40 to +125 ELECTRICAL SPECIFICATIONS (VIN = VCIN = 48 V, VEN = 5 V, TJ = -40 C to +125 C, unless otherwise stated)

8 PARAMETER SYMBOL TEST CONDITIONS MIN. UNIT Power SuppliesVDD supplyVDDVIN = VCIN = 6 V to 60 = VCIN = 5 dropoutVDD_DROPOUTVIN = VCIN = 5 V, IVDD = 1 mA-70-mVVDD UVLO threshold, UVLO hysteresisVDD_UVLO_HYST-225-mVMaximum VDD currentIDDVIN = VCIN = 6 V to 60 V3--mAVDRV supplyVDRVVIN = VCIN = 6 V to 60 = VCIN = 5 dropoutVDRV_DROPOUTVIN = VCIN = 5 V, IVDD = 10 mA-160-mVMaximum VDRV currentVDRVVIN = VCIN = 6 V to 60 V50--mAVDRV UVLO threshold, UVLO hysteresisVDRV_UVLO_HYST-295-mVInput currentIVCINNon-switching, VFB > V-235325 AShutdown currentIVCIN_SHDNVEN = 0 V-48 Controller and TimingFeedback voltageVFBTJ = 25 C796800804m/VTJ = -40 C to +125 C (1)792800808 VFB input bias source currentICOMP_SOURCE1520- ACOMP sink currentICOMP_SINK1520-Minimum accuracytON_ACCURACY-10-10%On-time rangetON_RANGE110-8000nsFrequency rangefswUltrasonic mode enabled20-2000kHzUltrasonic mode disabled0-2000 Minimum start currentISS357 ASoft start voltageVSSWhen VOUT reaches , SiC462, SiC463, Siliconix S18-0938-Rev.

9 M, 17-Sep-20185 Document Number: 65124 For technical questions, contact: DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT (1)Guaranteed by design(2)Guaranteed by design for SiC463 OCP measurements Fault ProtectionsValley current limitIOCPSiC461 (10 A),RILIM = 60 k , TJ = -10 C to +125 (6 A),RILIM = 60 k , TJ = -10 C to +125 (4 A),RILIM = 40 k , TJ = -10 C to +125 C (2) (2 A),RILIM = 60 k , TJ = -10 C to +125 OVP thresholdVOVPVFB with respect to V reference-20-%Output UVP thresholdVUVP--80-Over temperature protectionTOTP_RISINGR ising temperature-150- CTOTP_HYSTH ysteresis-35-Power GoodPower good output thresholdVFB_RISING_VTH_OVVFB rising above V reference-20-%VFB_FALLING_VTH_UVVFB falling below V reference--10-Power good hysteresisVFB_HYST-50-mVPower good on Power good delay timetDLY_PGOOD152535 sEN / MODE / Ultrasonic ThresholdEN logic high logic low pull down resistanceREN-5-M Ultrasonic mode high LevelVULTRASONIC_H2--VUltrasonic mode low pull up AMode 1 RMODEP ower save mode enabled, VDD, VDRV Pre-reg on02100k Mode 2 Power save mode disabled, VDD, VDRV Pre-reg on298301304 Mode 3 Power save mode disabled, VDRV Pre-reg off, VDD Pre-reg on, provide external VDRV494499504 Mode 4 Power save mode enabled, VDRV Pre-reg off,VDD Pre-reg on, provide external VDRV90010001100 ELECTRICAL SPECIFICATIONS (VIN = VCIN = 48 V, VEN = 5 V.)

10 TJ = -40 C to +125 C, unless otherwise stated)PARAMETER SYMBOL TEST CONDITIONS MIN. UNIT SiC461, SiC462, SiC463, Siliconix S18-0938-Rev. M, 17-Sep-20186 Document Number: 65124 For technical questions, contact: DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT BLOCK DIAGRAM Fig. 4 - SiC46x Functional Block DiagramOPERATIONAL DESCRIPTIOND evice OverviewSiC46x is a high efficiency synchronous buck regulator family capable of delivering up to 10 A continuous current. The device has programmable switching frequency of 100 kHz to 2 MHz. The voltage mode, constant on time control scheme delivers fast transient response, minimizes the number of external components and enables loop stability regardless of the type of output capacitor used, including low ESR ceramic capacitors.