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



SiC461, SiC462, SiC463, SiC464

Vishay Siliconix

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

LINKS TO ADDITIONAL RESOURCES

Design Tool

Evaluation Boards

Design Tools

DESCRIPTION

The 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 0.8 V from 4.5 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. 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 start.

The 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

INPUT 4.5 VDC to 60 VDC

CIN

Css

VCIN

V IN V DD V DRV MODE SS ILIMIT

PHASE SW

SiC46x

V SNS

ULTRASONIC

V FB

COMP

PGND AGND fSW

Rlimit

Rfsw

BOOT PGOOD EN

CBOOT

Rx Cy

Rcomp Ccomp

V OUT

Cx

Rup Rdown

COUT

Fig. 1 - Typical Application Circuit for SiC46x

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 - 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 ? Material categorization: for definitions of compliance

please see doc?99912

APPLICATIONS ? 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

2nd line eff - Efficiency (%)

1st line 2nd line

100 98 VIN = 48 V, VOUT = 12 V VIN= 24 V, VOUT = 12 V

10000

96

94

1000

92

90 VIN = 24 V, VOUT = 5 V

88

VIN = 48 V, VOUT = 5 V 86

100

84

82

80

10

0

1

2

3

4

5

6

IOUT - Output Current (A)

Fig. 2 - SiC462 Efficiency vs. Output Current

S23-0599-Rev. R, 07-Aug-2023

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Document Number: 65124

For technical questions, contact: powerictechsupport@

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT doc?91000

 PIN CONFIGURATION

SiC461, SiC462, SiC463, SiC464

Vishay Siliconix

20 VSNS 21 COMP 22 VFB 23 AGND 24 fSW 25 ILIM 26 VDD 27 MODE

27 MODE 26 VDD 25 ILIM 24 fSW 23 AGND 22 VFB 21 COMP 20 VSNS

VCIN 1 PGOOD 2

EN 3 BOOT 4

PHASE 5 PHASE 6

1 28 AGND

30

VIN

29 PGND

6

19 SS 18 ULTRASONIC 17 PGND 16 VDRV 15 GL

14 SW 13 SW 12 SW

SS 19 ULTRASONIC 1 8

PGND 1 7 VDRV 1 6

GL 1 5

SW 1 4 SW 1 3 SW 1 2

28 AGND

29

30 PGND

VIN

6

1 VCIN 2 PGOOD 3 EN 4 BOOT

5 PHASE 6 PHASE

PGND 11 PGND 10 PGND 9

VIN 8 VIN 7

VIN 7 VIN 8 PGND 9 PGND 10 PGND 11

Fig. 3 - SiC46x Pin Configuration

PIN DESCRIPTION

PIN NUMBER

SYMBOL

1

VCIN

2

PGOOD

3

4 5, 6 7, 8, 29 9, 10, 11, 17, 30 12, 13, 14 15

16

EN

BOOT PHASE

VIN PGND SW GL

VDRV

18

ULTRASONIC

19 20 21

22 23, 28

24 25 26 27

SS

VSNS COMP

VFB AGND fSW ILIMIT VDD MODE

DESCRIPTION

Supply 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 regulators

Open-drain power good indicator - high impedance indicates power is good. An external pull-up resistor is required

Enable pin. Tie high/low to enable/disable the IC accordingly. This is a high voltage compatible pin, can be tied to 60 V

High side driver bootstrap voltage

Return path of high side gate driver

Power stage input voltage. Drain of high side MOSFET

Power ground

Power stage switch node

Low side MOSFET gate signal

Supply voltage for internal gate driver. When using the internal LDO as a bias power supply, VDRV is the LDO output. Connect a 4.7 F decoupling capacitor to PGND Float to disable ultrasonic mode, connect to VDD to enable. 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 disabled

Set the soft start ramp by connecting a capacitor to AGND. An internal current source will charge the capacitor

Power inductor signal feedback pin for system stability compensation

Output of the internal error amplifier. The feedback loop compensation network is connected from this pin to the AGND pin Feedback input for switching regulator used to program the output voltage - connect to an external resistor divider from VOUT to AGND Analog ground

Set the on-time by connecting a resistor to AGND Set the current limit by connecting a resistor to AGND Bias supply for the IC. VDD is an LDO output, connect a 1 F decoupling capacitor to AGND Set various operation modes by connecting a resistor to AGND. See specification table for details

S23-0599-Rev. R, 07-Aug-2023

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Document Number: 65124

For technical questions, contact: powerictechsupport@

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT doc?91000



SiC461, SiC462, SiC463, SiC464

Vishay Siliconix

ORDERING INFORMATION

PART NUMBER SiC461ED-T1-GE3 SiC461EVB SiC462ED-T1-GE3 SiC462EVB SiC463ED-T1-GE3 SiC463EVB SiC464ED-T1-GE3 SiC464EVB

PACKAGE PowerPAK? MLP55-27L PowerPAK? MLP55-27L PowerPAK? MLP55-27L PowerPAK? MLP55-27L

Reference board Reference board Reference board Reference board

MARKING CODE SiC461 SiC462 SiC463 SiC464

PART MARKING INFORMATION

P/N LL F Y W W

= P/N =

= = F= Y= WW = LL =

pin 1 indicator part number code Siliconix logo ESD symbol assembly factory code year code week code lot code

ABSOLUTE MAXIMUM RATINGS (TA = 25 ?C, unless otherwise noted)

ELECTRICAL PARAMETER

CONDITIONS

VCIN, VIN EN SW / PHASE VDRV VDD SW / PHASE (AC) BOOT

Reference to PGND Reference to AGND Reference to PGND Reference to PGND Reference to AGND Reference to PGND; 100 ns

AGND to PGND All other pins Temperature

Reference to AGND

Junction temperature Storage temperature Power Dissipation

TJ TSTG

Thermal resistance from junction-to-ambient

Thermal resistance from junction-to-case

ESD Protection

Electrostatic discharge protection

Human body model, JESD22-A114 Charged device model, JESD22-A101

LIMITS -0.3 to 66 -0.3 to 60 -0.3 to 66 -0.3 to 6 -0.3 to 6 -10 to 72 -0.3 to VPHASE + VDRV -0.3 to 0.3 -0.3 to VDD + 0.3

-40 to +150 -65 to +150

12 2

2000 500

UNIT V

?C ?C/W

V

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 reliability.

S23-0599-Rev. R, 07-Aug-2023

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Document Number: 65124

For technical questions, contact: powerictechsupport@

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT doc?91000



SiC461, SiC462, SiC463, SiC464

Vishay Siliconix

RECOMMENDED OPERATING CONDITIONS (all voltages referenced to GND = 0 V)

PARAMETER

MIN.

TYP.

MAX.

UNIT

Input voltage (VIN) Control input voltage (VCIN) (1) Enable (EN) Bias supply (VDD) Drive supply voltage (VDRV) Output voltage (VOUT) Temperature

4.5

-

60

4.5

-

60

0

-

60

V

4.75

5

5.25

4.75

5.3

5.55

0.8

-

0.92 x VIN

Recommended ambient temperature Operating junction temperature

-40 to +105 ?C

-40 to +125

Note (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 triggering

ELECTRICAL SPECIFICATIONS (VIN = VCIN = 48 V, VEN = 5 V, TJ = -40 ?C to +125 ?C, unless otherwise stated)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN. TYP. MAX. UNIT

Power Supplies

VDD supply

VDD dropout VDD UVLO threshold, rising VDD UVLO hysteresis Maximum VDD current

VDRV supply

VDRV dropout Maximum VDRV current VDRV UVLO threshold, rising VDRV UVLO hysteresis Input current Shutdown current Controller and Timing

VDD

VDD_DROPOUT VDD_UVLO

VDD_UVLO_HYST IDD

VDRV

VDRV_DROPOUT VDRV

VDRV_UVLO VDRV_UVLO_HYST

IVCIN IVCIN_SHDN

VIN = VCIN = 6 V to 60 V VIN = VCIN = 5 V

VIN = VCIN = 5 V, IVDD = 1 mA

VIN = VCIN = 6 V to 60 V VIN = VCIN = 6 V to 60 V

VIN = VCIN = 5 V VIN = VCIN = 5 V, IVDD = 10 mA

VIN = VCIN = 6 V to 60 V

Non-switching, VFB > 0.8 V VEN = 0 V

4.75 5 5.25

V

4.7

5

-

-

70

-

mV

4 4.25 4.5 V

-

225

-

mV

3

-

-

mA

4.75 5.3 5.55

V

4.8

5

5.2

-

160

-

mV

30

-

-

mA

4 4.25 4.5 V

-

295

-

mV

-

235 325

A

-

4

8

Feedback voltage

VFB input bias current Transconductance COMP source current COMP sink current Minimum on-time tON accuracy On-time range

Frequency range

VFB

IFB gm ICOMP_SOURCE ICOMP_SINK tON_MIN. tON_ACCURACY tON_RANGE

fsw

TJ = 25 ?C TJ = -40 ?C to +125 ?C (1)

Ultrasonic mode enabled Ultrasonic mode disabled

796 800 804 mV

792 800 808

-

2

-

nA

-

0.3

-

mS

15 20

-

A

15 20

-

-

90 110 ns

-10

-

10 %

110

- 8000 ns

20

- 2000

kHz

0

- 2000

Minimum off-time Soft start current Soft start voltage

tOFF_MIN. ISS VSS

When VOUT reaches regulation

190 250 310 ns

3

5

7

A

-

1.5

-

V

S23-0599-Rev. R, 07-Aug-2023

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Document Number: 65124

For technical questions, contact: powerictechsupport@

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT doc?91000



SiC461, SiC462, SiC463, SiC464

Vishay Siliconix

ELECTRICAL SPECIFICATIONS (VIN = VCIN = 48 V, VEN = 5 V, TJ = -40 ?C to +125 ?C, unless otherwise stated)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN. TYP. MAX. UNIT

Fault Protections

Valley current limit

Output OVP threshold Output UVP threshold Over temperature protection Power Good

IOCP

VOVP VUVP TOTP_RISING TOTP_HYST

SiC461 (10 A), RILIM = 60 k, TJ = -10 ?C to +125 ?C

10.4 13 15.6

SiC462 (6 A), RILIM = 60 k, TJ = -10 ?C to +125 ?C

6.4

8

9.6

A

SiC463 (4 A), RILIM = 40 k, TJ = -10 ?C to +125 ?C (2)

4.8

6

7.2

SiC464 (2 A), RILIM = 60 k, TJ = -10 ?C to +125 ?C

3.2

4

4.8

VFB with respect to 0.8 V reference

-

20

-

%

-

-80

-

Rising temperature Hysteresis

-

150

-

?C

-

35

-

Power good output threshold

Power good hysteresis Power good on resistance Power good delay time EN / MODE / Ultrasonic Threshold

VFB_RISING_VTH_OV VFB_FALLING_VTH_UV

VFB_HYST RON_PGOOD tDLY_PGOOD

VFB rising above 0.8 V reference VFB falling below 0.8 V reference

-

20

-

%

-

-10

-

-

50

-

mV

-

7.5 15

15 25 35 s

EN logic high level EN logic low level EN hysteresis EN pull down resistance Ultrasonic mode high Level Ultrasonic mode low level Mode pull up current

Mode 1

VEN_H VEN_L VHYST REN VULTRASONIC_H VULTRASONIC_L IMODE

Power save mode enabled, VDD, VDRV Pre-reg on

- 1.35 -

-

1.2

-

V

- 0.15 -

5

7

9 M

2

-

-

V

-

-

0.8

3.75 5 6.25 A

0

2 100

Mode 2 Mode 3 Mode 4

RMODE

Power save mode disabled, VDD, VDRV Pre-reg on

298 301 304

k

Power save mode disabled, VDRV Pre-reg off, VDD Pre-reg on, provide external VDRV

494

499

504

Power save mode enabled, VDRV Pre-reg off, VDD Pre-reg on, provide external VDRV

900

1000 1100

Notes (1) Guaranteed by design (2) Guaranteed by design for SiC463 OCP measurements

S23-0599-Rev. R, 07-Aug-2023

5

Document Number: 65124

For technical questions, contact: powerictechsupport@

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT doc?91000

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