Power ICs - microBUCK® - Voltage Regulator

microBUCK: Scalability + Ease of Use + High Efficiency

Highly integrated microBUCK POL solutions deliver high efficiency while reducing costs
Each family offers a large portfolio of high density parts with common pinouts, allowing designers to scale for the best combination of cost and performance
Our PowerCAD simulation tool allows users to select the appropriate microBUCK regulator and generate a full circuit schematic
- For performance optimization and comparison purposes, the schematic can then be edited as required.
- Once the basic circuit is created, the user can perform DC, transient, and start-up simulations with visibility of all the circuit node waveforms.
- Following these steps, the PowerCAD 2.0 simulation tool generates a bill of materials (BOM) available for online ordering.

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Part Number ▲▼	Description ▲▼	V_in Min. (V) ▲▼	V_in Max. (V) ▲▼	V_out Min (V) ▲▼	V_out Max (V) ▲▼	Continuous Output Current (A) ▲▼	Switch Freq Min. (kHz) ▲▼	Switch Freq Max. (kHz) ▲▼	Pre Bias Oper. (Y/N) ▲▼	Internal Bias Regulator ▲▼	Compen-sation (Y/N) ▲▼	Enable (Y/N) ▲▼	P_GOOD (Y/N) ▲▼	Over Current Protection (Y/N) ▲▼	Protection ▲▼	Light Load Mode ▲▼	Peak Eff. (%) ▲▼	Package ▲▼	Package Size (W,L,H) (mm) ▲▼
SIC431	24A,3V to 24V in,up to 1MHz,Synch. Buck Regulator	3	24	0.6	20	24	300	1000	Y	Y	Internal	Y	Y	Y	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable Powersave/Ultrasonic	97	PowerPak MLP 44-24L	4.0 x 4.0 x 0.75
SiC437A	12 A, 4.5 V to 28 V input, 300 kHz, 500 kHz, 750 kHz, 1 MHz, synchronous buck regulator with ultrasonic mode and internal 5 V bias	4.5	28	0.6	0.9 x VIN	12	300	1000	Yes	Yes	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable ultrasonic	97	PowerPAK MLP44-24L	4 x 4 x 0.75
SiC437B	12 A, 4.5 V to 28 V input, 300 kHz, 500 kHz, 750 kHz, 1 MHz, synchronous buck regulator with power save mode and internal 5 V bias	4.5	28	0.6	0.9 x VIN	12	300	1000	Yes	Yes	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave	97	PowerPAK MLP44-24L	4 x 4 x 0.75
SiC437C	12 A, 3 V to 28 V input, 300 kHz, 500 kHz, 750 kHz, 1 MHz, synchronous buck regulator with ultrasonic mode, requires external 5 V bias	3	28	0.6	0.9 x VIN	12	300	1000	Yes	No	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable ultrasonic	97	PowerPAK MLP44-24L	4 x 4 x 0.75
SiC437D	12 A, 3 V to 28 V input, 300 kHz, 500 kHz, 750 kHz, 1 MHz, synchronous buck regulator with power save mode, requires external 5 V bias	3	28	0.6	0.9 x VIN	12	300	1000	Yes	No	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave	97	PowerPAK MLP44-24L	4 x 4 x 0.75
SiC438A	8 A, 4.5 V to 28 V input, 300 kHz, 500 kHz, 750 kHz, 1 MHz, synchronous buck regulator with ultrasonic mode and internal 5 V bias	4.5	28	0.6	0.9 x VIN	8	300	1000	Yes	Yes	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable ultrasonic	97	PowerPAK MLP44-24L	4 x 4 x 0.75
SiC438B	8 A, 4.5 V to 28 V input, 300 kHz, 500 kHz, 750 kHz, 1 MHz, synchronous buck regulator with power save mode and internal 5 V bias	4.5	28	0.6	0.9 x VIN	8	300	1000	Yes	Yes	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave	97	PowerPAK MLP44-24L	4 x 4 x 0.75
SiC438C	8 A, 3 V to 28 V input, 300 kHz, 500 kHz, 750 kHz, 1 MHz, synchronous buck regulator with ultrasonic mode, requires external 5 V bias	3	28	0.6	0.9 x VIN	8	300	1000	Yes	No	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable ultrasonic	97	PowerPAK MLP44-24L	4 x 4 x 0.75
SiC438D	8 A, 3 V to 28 V input, 300 kHz, 500 kHz, 750 kHz, 1 MHz, synchronous buck regulator with power save mode, requires external 5 V bias	3	28	0.6	0.9 x VIN	8	300	1000	Yes	No	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave	97	PowerPAK MLP44-24L	4 x 4 x 0.75
SiC448	6 A, 4.5 V to 45 V input, 100 kHz to 2 MHz, synchronous buck regulator	4.5	45	0.8	0.92 x VIN	6	100	2000	Yes	Yes	External	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave / ultrasonic	98	PowerPAK MLP55-27L	5 x 5 x 0.75
SiC450	4.5 V to 20 V input 40 A microBUCK DC/DC converter with PMBus	4.5	20	0.3	12	40	300	1500	yes	yes	internal	yes	yes	yes	OVP, OCP, UVP/SCP, OTP, UVLO	yes	96	PowerPAK MLP34-57	5.0 x 7.0 x 0.75
SiC451	4.5 V to 20 V input 25 A microBUCK DC/DC converter with PMBus	4.5	20	0.3	12	25	300	1500	yes	yes	internal	yes	yes	yes	OVP, OCP, UVP/SCP, OTP, UVLO	yes	96	PowerPAK MLP34-57	5.0 x 7.0 x 0.75
SiC453	4.5 V to 20 V input 15 A microBUCK DC/DC converter with PMBus	4.5	20	0.3	12	15	300	1500	yes	yes	internal	yes	yes	yes	OVP, OCP, UVP/SCP, OTP, UVLO	yes	96	PowerPAK MLP34-57	5.0 x 7.0 x 0.75
SiC454	4.5 V to 20 V input 12 A microBUCK DC/DC converter with PMBus	4.5	20	0.3	12	12	300	1500	Yes	Yes	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Yes	98	PowerPAK MLP29-55	5.0 x 5.0 x 0.75
SiC461	10 A, 4.5 V to 60 V input, 100 kHz to 2 MHz, synchronous buck regulator	4.5	60	0.8	0.92 x VIN	10	100	2000	Yes	Yes	External	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave / ultrasonic	98	PowerPAK MLP55-27L	5 x 5 x 0.75
SiC462	6 A, 4.5 V to 60 V input, 100 kHz to 2 MHz, synchronous buck regulator	4.5	60	0.8	0.92 x VIN	6	100	2000	Yes	Yes	External	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave / ultrasonic	98	PowerPAK MLP55-27L	5 x 5 x 0.75
SiC463	4 A, 4.5 V to 60 V input, 100 kHz to 2 MHz, synchronous buck regulator	4.5	60	0.8	0.92 x VIN	4	100	2000	Yes	Yes	External	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave / ultrasonic	98	PowerPAK MLP55-27L	5 x 5 x 0.75
SiC464	2 A, 4.5 V to 60 V input, 100 kHz to 2 MHz, synchronous buck regulator	4.5	60	0.8	0.92 x VIN	2	100	2000	Yes	Yes	External	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave / ultrasonic	98	PowerPAK MLP55-27L	5 x 5 x 0.75
SiC466	10 A, 4.5 V to 60 V input,100 kHz to 2 MHz,synchronous microBUCKregulator	4.5	60	0.8	15	10	100	2000	Yes	Yes	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave	97	PowerPAK MLP55-27L	5 x 5 x 0.75
SiC467	6 A, 4.5 V to 60 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator	4.5	60	0.8	15	6	100	2000	Yes	Yes	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave	98	PowerPAK MLP55-27L	5 x 5 x 0.75
SiC468	4 A, 4.5 V to 60 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator	4.5	60	0.8	15	4	100	2000	Yes	Yes	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave	98	PowerPAK MLP55-27L	5 x 5 x 0.75
SiC469	2 A, 4.5 V to 60 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator	4.5	60	0.8	15	2	100	2000	Yes	Yes	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave	98	PowerPAK MLP55-27L	5 x 5 x 0.75
SiC471	12 A, 4.5 V to 55 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator	4.5	55	0.8	0.92 x VIN	12	100	2000	Yes	Yes	External	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave / ultrasonic	98	PowerPAK MLP55-27L	5 x 5 x 0.75
SiC472	8 A, 4.5 V to 55 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator	4.5	55	0.8	0.92 x VIN	8	100	2000	Yes	Yes	External	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave / ultrasonic	98	PowerPAK MLP55-27L	5 x 5 x 0.75
SiC473	5 A, 4.5 V to 55 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator	4.5	55	0.8	0.92 x VIN	5	100	2000	Yes	Yes	External	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave / ultrasonic	98	PowerPAK MLP55-27L	5 x 5 x 0.75
SiC474	3 A, 4.5 V to 55 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator	4.5	55	0.8	0.92 x VIN	3	100	2000	Yes	Yes	External	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Selectable powersave / ultrasonic	98	PowerPAK MLP55-27L	5 x 5 x 0.75
SiC476	12 A, 4.5 V to 55 V input,100 kHz to 2 MHz,synchronous microBUCKregulator	4.5	55	0.8	15	12	100	2000	Yes	Yes	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Power save	97	PowerPAK MLP55-27L	5 x 5 x 0.75
SiC477	8 A, 4.5 V to 55 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator	4.5	55	0.8	15	8	100	2000	Yes	Yes	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Power save	98	PowerPAK MLP55-27L	5 x 5 x 0.75
SiC478	5 A, 4.5 V to 55 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator	4.5	55	0.8	15	5	100	2000	Yes	Yes	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Power save	98	PowerPAK MLP55-27L	5 x 5 x 0.75
SiC479	3 A, 4.5 V to 55 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator	4.5	55	0.8	15	3	100	2000	Yes	Yes	Internal	Yes	Yes	Yes	OVP, OCP, UVP/SCP, OTP, UVLO	Power save	98	PowerPAK MLP55-27L	5 x 5 x 0.75
SiP12109	4 A, 4.5 V to 15 V input, 1.5 MHz synchronous buck regulator	4.5	15	0.6	5.5	4	200	1500	Yes	Yes	External	Yes	Yes	Fixed	OVP, OCP, OTP, SCP, UVLO	Powersave	95	QFN16-33G	3.0 x 3.0 x 0.8

Show entries

(all)
SIC431
SiC437A
SiC437B
SiC437C
SiC437D
SiC438A
SiC438B
SiC438C
SiC438D
SiC448
SiC450
SiC451
SiC453
SiC454
SiC461
SiC462
SiC463
SiC464
SiC466
SiC467
SiC468
SiC469
SiC471
SiC472
SiC473
SiC474
SiC476
SiC477
SiC478
SiC479
SiP12109

(all)
2 A, 4.5 V to 60 V input, 100 kHz to 2 MHz, synchronous buck regulator
2 A, 4.5 V to 60 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator
3 A, 4.5 V to 55 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator
4 A, 4.5 V to 15 V input, 1.5 MHz synchronous buck regulator
4 A, 4.5 V to 60 V input, 100 kHz to 2 MHz, synchronous buck regulator
4 A, 4.5 V to 60 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator
4.5 V to 20 V input 12 A microBUCK DC/DC converter with PMBus
4.5 V to 20 V input 15 A microBUCK DC/DC converter with PMBus
4.5 V to 20 V input 25 A microBUCK DC/DC converter with PMBus
4.5 V to 20 V input 40 A microBUCK DC/DC converter with PMBus
5 A, 4.5 V to 55 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator
6 A, 4.5 V to 45 V input, 100 kHz to 2 MHz, synchronous buck regulator
6 A, 4.5 V to 60 V input, 100 kHz to 2 MHz, synchronous buck regulator
6 A, 4.5 V to 60 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator
8 A, 3 V to 28 V input, 300 kHz, 500 kHz, 750 kHz, 1 MHz, synchronous buck regulator with power save mode, requires external 5 V bias
8 A, 3 V to 28 V input, 300 kHz, 500 kHz, 750 kHz, 1 MHz, synchronous buck regulator with ultrasonic mode, requires external 5 V bias
8 A, 4.5 V to 28 V input, 300 kHz, 500 kHz, 750 kHz, 1 MHz, synchronous buck regulator with power save mode and internal 5 V bias
8 A, 4.5 V to 28 V input, 300 kHz, 500 kHz, 750 kHz, 1 MHz, synchronous buck regulator with ultrasonic mode and internal 5 V bias
8 A, 4.5 V to 55 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator
10 A, 4.5 V to 60 V input, 100 kHz to 2 MHz, synchronous buck regulator
10 A, 4.5 V to 60 V input,100 kHz to 2 MHz,synchronous microBUCKregulator
12 A, 3 V to 28 V input, 300 kHz, 500 kHz, 750 kHz, 1 MHz, synchronous buck regulator with power save mode, requires external 5 V bias
12 A, 3 V to 28 V input, 300 kHz, 500 kHz, 750 kHz, 1 MHz, synchronous buck regulator with ultrasonic mode, requires external 5 V bias
12 A, 4.5 V to 28 V input, 300 kHz, 500 kHz, 750 kHz, 1 MHz, synchronous buck regulator with power save mode and internal 5 V bias
12 A, 4.5 V to 28 V input, 300 kHz, 500 kHz, 750 kHz, 1 MHz, synchronous buck regulator with ultrasonic mode and internal 5 V bias
12 A, 4.5 V to 55 V input, 100 kHz to 2 MHz, synchronous microBUCK regulator
12 A, 4.5 V to 55 V input,100 kHz to 2 MHz,synchronous microBUCKregulator
24A,3V to 24V in,up to 1MHz,Synch. Buck Regulator

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