Automotive DC-DC Converter

Automotive DC-DC Converter

Such as reduction of power consumption and miniaturization are important in designing DC-DC converter. Toshiba provides information on a wide range of semiconductor products suitable for step-up or step-down DC-DC converter units, etc., along with circuit configuration examples.

Overall block diagram

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 Low Voltage Battery (12 V) Low Voltage Battery (12 V) High Voltage Battery (up to 400 V) High Voltage Battery(up to 400 V) Battery Reverse Protection/ Load Switch Battery Reverse Protection/Load Switch CAN Line CANLine Battery (12 V) Battery(12 V) Control Circuit Control Circuit Isolated Feedback Isolated Feedback Isolated Driver Isolated Driver Isolated Driver Isolated Driver TVS TVS Converter Converter Power supply ON/OFF control and reverse connection protecting circuit DC-DC converter circuit
DC-DC converter circuit

Example of isolated full-bridge DC-DC converters

Power supply ON/OFF control and reverse connection protecting circuit

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 12 V power lines

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 48 V power lines

Click the area you want to check the details in the overall block diagram. Show links to our proposed sub-block diagram.

 Low Voltage Line Low Voltage Line High Voltage Line High Voltage Line Battery Reverse Protection/ Load Switch Battery Reverse Protection/Load Switch Battery Reverse Protection/ Load Switch Battery Reverse Protection/Load Switch Converter Converter Power supply ON/OFF control and reverse connection protecting circuit Power supply ON/OFF control and reverse connection protecting circuit DC-DC converter circuit (non-isolated buck type)
DC-DC converter circuit (non-isolated buck type)

Example of non-isolated step-down DC-DC converters

Power supply ON/OFF control and reverse connection protecting circuit

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 12 V power lines

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 48 V power lines

Click the area you want to check the details in the overall block diagram. Show links to our proposed sub-block diagram.

 High Voltage Line High Voltage Line Low Voltage Line Low Voltage Line Battery Reverse Protection/ Load Switch Battery Reverse Protection/Load Switch Battery Reverse Protection/ Load Switch Battery Reverse Protection/Load Switch Converter Converter Power supply ON/OFF control and reverse connection protecting circuit Power supply ON/OFF control and reverse connection protecting circuit DC-DC converter circuit (non-isolated boost type)
DC-DC converter circuit (non-isolated boost type)

Example of non-isolated boost DC-DC converters

Power supply ON/OFF control and reverse connection protecting circuit

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 12 V power lines

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 48 V power lines

Sub block diagram

DC-DC converter circuit
DC-DC converter circuit (isolated type)

Example of isolated full-bridge DC-DC converters

Example of isolated full-bridge DC-DC converters
U-MOS Series 100V N-ch MOSFET(1)
Part Number
Toshiba Package Name TSON Advance(WF) DPAK+ SOP Advance(WF) SOP Advance(WF)
VDSS (Max) [V] 100 100 100 100
ID (Max) [A] 30 60 70 45
RDS(ON) (Max) [Ω] @ |VGS| = 10.0 [V] 0.0133 0.00611 0.0041 0.0063
Polarity N-ch N-ch N-ch N-ch
U-MOS Series 100V N-ch MOSFET(2)
Part Number
Toshiba Package Name DSOP Advance(WF)L DSOP Advance(WF)M L-TOGL
VDSS (Max) [V] 100 100 100
ID (Max) [A] 70 45 300
RDS(ON) (Max) [Ω] @ |VGS| = 10.0 [V] 0.0041 0.0063 0.00103
Polarity N-ch N-ch N-ch
Transistor output photocoupler
Part Number
Toshiba Package Name SO4 4pin SO6 SO4 4pin SO6 4pin SO6
BVS (Min) [Vrms] @ t = 60 [s] 3750 3750 3750 3750 3750
VCEO (Max) [V] 80 80 40 40 200
Topr [°C] -40 to 125 -40 to 125 -40 to 125 -40 to 125 -40 to 125
TVS diode (for CAN communication)
Part Number
Toshiba Package Name SOT-323 (USM) SOT-323 (USM) SOT-323 (USM)
VESD (Max) [kV] +/-30 +/-25 +/-20
IR (Max) [µA] 0.1 0.1 0.1
Rdyn (Typ.) [Ω] 0.8 1.1 1.5
CT (Typ.) [pF] @ VR = 0 [V], f = 1 [MHz] 9 9 6.5
Power supply ON/OFF control and reverse connection protecting circuit
Power supply ON/OFF control and reverse connection protecting circuit (N-ch type 12 V)

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 12 V power lines

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 12 V power lines
U-MOS Series 40 V N-ch MOSFET
Part Number
Toshiba Package Name TSON Advance(WF) DPAK+ SOP Advance(WF) DSOP Advance(WF)L S-TOGL L-TOGL
VDSS (Max) [V] 40 40 40 40 40 40
ID (Max) [A] 40 120 150 150 200 400
RDS(ON) (Max) [Ω] @ |VGS| = 10.0 [V] 0.0038 0.00135 0.00079 0.00079 0.00066 0.00030
Polarity N-ch N-ch N-ch N-ch N-ch N-ch
Gate driver (for switch)
Part Number
Toshiba Package name PS-8 SSOP16 WSON10A
VBB (Max) [V]      
VCC (Max) [V]      
IO (Max) [A] +5mA/ Internally Limited   Internally Limited /-5m
General purpose small signal MOSFET
Part Number
Toshiba Package Name SOT-346 (S-Mini) SOT-346 (S-Mini) SOT-723 (VESM)
VDSS (Max) [V] 60 -60 -20
ID (Max) [A] 0.4 -0.4 -0.8
RDS(ON) (Max) [Ω] @ |VGS| = 4.5 [V] 1.75 1.9 0.39
Polarity N-ch P-ch P-ch
General purpose small signal bipolar transistor
Part Number
Toshiba Package Name SOT-416 (SSM) SOT-416 (SSM) SOT-323 (USM) SOT-323 (USM) SOT-346 (S-Mini) SOT-346 (S-Mini)
VCEO (Max) [V] -50 50 50 -50 50 -50
IC (Max) [A] -0.15 0.15 0.15 -0.15 0.15 -0.15
Polarity PNP NPN NPN PNP NPN PNP
Small signal bias resistor built-in transistor (BRT)
Part Number
Toshiba Package Name SOT-563 (ES6) SOT-563 (ES6) SOT-363 (US6) SOT-363 (US6)
VCEO (Q1) (Max) [V] 50 -50 50 -50
VCEO (Q2) (Max) [V] 50 -50 50 -50
IC (Q1) (Max) [A] 0.1 -0.1 0.1 -0.1
IC (Q2) (Max) [A] 0.1 -0.1 0.1 -0.1
Polarity (Q1) NPN PNP NPN PNP
Polarity (Q2) NPN PNP NPN PNP
TVS diode (for CAN communication)
Part Number
Toshiba Package Name SOT-323 (USM) SOT-323 (USM) SOT-323 (USM)
VESD (Max) [kV] +/-30 +/-25 +/-20
IR (Max) [µA] 0.1 0.1 0.1
Rdyn (Typ.) [Ω] 0.8 1.1 1.5
CT (Typ.) [pF] @ VR = 0 [V], f = 1 [MHz] 9 9 6.5
Power supply ON/OFF control and reverse connection protecting circuit (N-ch type 48 V)

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 48 V power lines

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 48 V power lines
U-MOS Series 100V N-ch MOSFET(1)
Part Number
Toshiba Package Name TSON Advance(WF) DPAK+ SOP Advance(WF) SOP Advance(WF)
VDSS (Max) [V] 100 100 100 100
ID (Max) [A] 30 60 70 45
RDS(ON) (Max) [Ω] @ |VGS| = 10.0 [V] 0.0133 0.00611 0.0041 0.0063
Polarity N-ch N-ch N-ch N-ch
U-MOS Series 100V N-ch MOSFET(2)
Part Number
Toshiba Package Name DSOP Advance(WF)L DSOP Advance(WF)M L-TOGL
VDSS (Max) [V] 100 100 100
ID (Max) [A] 70 45 300
RDS(ON) (Max) [Ω] @ |VGS| = 10.0 [V] 0.0041 0.0063 0.00103
Polarity N-ch N-ch N-ch
General purpose small signal MOSFET
Part Number
Toshiba Package Name SOT-346 (S-Mini) SOT-346 (S-Mini) SOT-723 (VESM)
VDSS (Max) [V] 60 -60 -20
ID (Max) [A] 0.4 -0.4 -0.8
RDS(ON) (Max) [Ω] @ |VGS| = 4.5 [V] 1.75 1.9 0.39
Polarity N-ch P-ch P-ch
General purpose small signal bipolar transistor
Part Number
Toshiba Package Name SOT-416 (SSM) SOT-416 (SSM) SOT-323 (USM) SOT-323 (USM) SOT-346 (S-Mini) SOT-346 (S-Mini)
VCEO (Max) [V] -50 50 50 -50 50 -50
IC (Max) [A] -0.15 0.15 0.15 -0.15 0.15 -0.15
Polarity PNP NPN NPN PNP NPN PNP
Small signal bias resistor built-in transistor (BRT)
Part Number
Toshiba Package Name SOT-563 (ES6) SOT-563 (ES6) SOT-363 (US6) SOT-363 (US6)
VCEO (Q1) (Max) [V] 50 -50 50 -50
VCEO (Q2) (Max) [V] 50 -50 50 -50
IC (Q1) (Max) [A] 0.1 -0.1 0.1 -0.1
IC (Q2) (Max) [A] 0.1 -0.1 0.1 -0.1
Polarity (Q1) NPN PNP NPN PNP
Polarity (Q2) NPN PNP NPN PNP
TVS diode (for CAN communication)
Part Number
Toshiba Package Name SOT-323 (USM) SOT-323 (USM) SOT-323 (USM)
VESD (Max) [kV] +/-30 +/-25 +/-20
IR (Max) [µA] 0.1 0.1 0.1
Rdyn (Typ.) [Ω] 0.8 1.1 1.5
CT (Typ.) [pF] @ VR = 0 [V], f = 1 [MHz] 9 9 6.5
DC-DC converter circuit (non-isolated buck type)
DC-DC converter circuit (non-isolated buck type)

Example of non-isolated step-down DC-DC converters

Example of non-isolated step-down DC-DC converters
U-MOS Series 100V N-ch MOSFET(1)
Part Number
Toshiba Package Name TSON Advance(WF) DPAK+ SOP Advance(WF) SOP Advance(WF)
VDSS (Max) [V] 100 100 100 100
ID (Max) [A] 30 60 70 45
RDS(ON) (Max) [Ω] @ |VGS| = 10.0 [V] 0.0133 0.00611 0.0041 0.0063
Polarity N-ch N-ch N-ch N-ch
U-MOS Series 100V N-ch MOSFET(2)
Part Number
Toshiba Package Name DSOP Advance(WF)L DSOP Advance(WF)M L-TOGL
VDSS (Max) [V] 100 100 100
ID (Max) [A] 70 45 300
RDS(ON) (Max) [Ω] @ |VGS| = 10.0 [V] 0.0041 0.0063 0.00103
Polarity N-ch N-ch N-ch
U-MOS Series 60 V N-ch MOSFET
Part Number
Toshiba Package Name TSON Advance(WF) TSON Advance(WF) SOP Advance(WF) SOP Advance(WF) DPAK+
VDSS (Max) [V] 60 60 60 60 60
ID (Max) [A] 20 40 70 110 90
RDS(ON) (Max) [Ω] @ |VGS| = 10.0 [V] 0.0120 0.0067 0.0032 0.0021 0.0033
Polarity N-ch N-ch N-ch N-ch N-ch
U-MOS Series 40 V N-ch MOSFET
Part Number
Toshiba Package Name TSON Advance(WF) DPAK+ SOP Advance(WF) DSOP Advance(WF)L S-TOGL L-TOGL
VDSS (Max) [V] 40 40 40 40 40 40
ID (Max) [A] 40 120 150 150 200 400
RDS(ON) (Max) [Ω] @ |VGS| = 10.0 [V] 0.0038 0.00135 0.00079 0.00079 0.00066 0.00030
Polarity N-ch N-ch N-ch N-ch N-ch N-ch
Power supply ON/OFF control and reverse connection protecting circuit
Power supply ON/OFF control and reverse connection protecting circuit (N-ch type 12 V)

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 12 V power lines

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 12 V power lines
U-MOS Series 40 V N-ch MOSFET
Part Number
Toshiba Package Name TSON Advance(WF) DPAK+ SOP Advance(WF) DSOP Advance(WF)L S-TOGL L-TOGL
VDSS (Max) [V] 40 40 40 40 40 40
ID (Max) [A] 40 120 150 150 200 400
RDS(ON) (Max) [Ω] @ |VGS| = 10.0 [V] 0.0038 0.00135 0.00079 0.00079 0.00066 0.00030
Polarity N-ch N-ch N-ch N-ch N-ch N-ch
Gate driver (for switch)
Part Number
Toshiba Package name PS-8 SSOP16 WSON10A
VBB (Max) [V]      
VCC (Max) [V]      
IO (Max) [A] +5mA/ Internally Limited   Internally Limited /-5m
General purpose small signal MOSFET
Part Number
Toshiba Package Name SOT-346 (S-Mini) SOT-346 (S-Mini) SOT-723 (VESM)
VDSS (Max) [V] 60 -60 -20
ID (Max) [A] 0.4 -0.4 -0.8
RDS(ON) (Max) [Ω] @ |VGS| = 4.5 [V] 1.75 1.9 0.39
Polarity N-ch P-ch P-ch
General purpose small signal bipolar transistor
Part Number
Toshiba Package Name SOT-416 (SSM) SOT-416 (SSM) SOT-323 (USM) SOT-323 (USM) SOT-346 (S-Mini) SOT-346 (S-Mini)
VCEO (Max) [V] -50 50 50 -50 50 -50
IC (Max) [A] -0.15 0.15 0.15 -0.15 0.15 -0.15
Polarity PNP NPN NPN PNP NPN PNP
Small signal bias resistor built-in transistor (BRT)
Part Number
Toshiba Package Name SOT-563 (ES6) SOT-563 (ES6) SOT-363 (US6) SOT-363 (US6)
VCEO (Q1) (Max) [V] 50 -50 50 -50
VCEO (Q2) (Max) [V] 50 -50 50 -50
IC (Q1) (Max) [A] 0.1 -0.1 0.1 -0.1
IC (Q2) (Max) [A] 0.1 -0.1 0.1 -0.1
Polarity (Q1) NPN PNP NPN PNP
Polarity (Q2) NPN PNP NPN PNP
TVS diode (for CAN communication)
Part Number
Toshiba Package Name SOT-323 (USM) SOT-323 (USM) SOT-323 (USM)
VESD (Max) [kV] +/-30 +/-25 +/-20
IR (Max) [µA] 0.1 0.1 0.1
Rdyn (Typ.) [Ω] 0.8 1.1 1.5
CT (Typ.) [pF] @ VR = 0 [V], f = 1 [MHz] 9 9 6.5
Power supply ON/OFF control and reverse connection protecting circuit (N-ch type 48 V)

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 48 V power lines

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 48 V power lines
U-MOS Series 100V N-ch MOSFET(1)
Part Number
Toshiba Package Name TSON Advance(WF) DPAK+ SOP Advance(WF) SOP Advance(WF)
VDSS (Max) [V] 100 100 100 100
ID (Max) [A] 30 60 70 45
RDS(ON) (Max) [Ω] @ |VGS| = 10.0 [V] 0.0133 0.00611 0.0041 0.0063
Polarity N-ch N-ch N-ch N-ch
U-MOS Series 100V N-ch MOSFET(2)
Part Number
Toshiba Package Name DSOP Advance(WF)L DSOP Advance(WF)M L-TOGL
VDSS (Max) [V] 100 100 100
ID (Max) [A] 70 45 300
RDS(ON) (Max) [Ω] @ |VGS| = 10.0 [V] 0.0041 0.0063 0.00103
Polarity N-ch N-ch N-ch
General purpose small signal MOSFET
Part Number
Toshiba Package Name SOT-346 (S-Mini) SOT-346 (S-Mini) SOT-723 (VESM)
VDSS (Max) [V] 60 -60 -20
ID (Max) [A] 0.4 -0.4 -0.8
RDS(ON) (Max) [Ω] @ |VGS| = 4.5 [V] 1.75 1.9 0.39
Polarity N-ch P-ch P-ch
General purpose small signal bipolar transistor
Part Number
Toshiba Package Name SOT-416 (SSM) SOT-416 (SSM) SOT-323 (USM) SOT-323 (USM) SOT-346 (S-Mini) SOT-346 (S-Mini)
VCEO (Max) [V] -50 50 50 -50 50 -50
IC (Max) [A] -0.15 0.15 0.15 -0.15 0.15 -0.15
Polarity PNP NPN NPN PNP NPN PNP
Small signal bias resistor built-in transistor (BRT)
Part Number
Toshiba Package Name SOT-563 (ES6) SOT-563 (ES6) SOT-363 (US6) SOT-363 (US6)
VCEO (Q1) (Max) [V] 50 -50 50 -50
VCEO (Q2) (Max) [V] 50 -50 50 -50
IC (Q1) (Max) [A] 0.1 -0.1 0.1 -0.1
IC (Q2) (Max) [A] 0.1 -0.1 0.1 -0.1
Polarity (Q1) NPN PNP NPN PNP
Polarity (Q2) NPN PNP NPN PNP
TVS diode (for CAN communication)
Part Number
Toshiba Package Name SOT-323 (USM) SOT-323 (USM) SOT-323 (USM)
VESD (Max) [kV] +/-30 +/-25 +/-20
IR (Max) [µA] 0.1 0.1 0.1
Rdyn (Typ.) [Ω] 0.8 1.1 1.5
CT (Typ.) [pF] @ VR = 0 [V], f = 1 [MHz] 9 9 6.5
DC-DC converter circuit (non-isolated boost type)
DC-DC converter circuit (non-isolated boost type)

Example of non-isolated boost DC-DC converters

Example of non-isolated boost DC-DC converters
U-MOS Series 100V N-ch MOSFET(1)
Part Number