An ideal semiconductor should behave as a switch. In other words, an ideal diode should show infinite conductance when active, behaving as a closed circuit. Also, it should show infinite resistance when inactive, behaving as an open circuit. Since it shows infinite conductance in operating mode, there is apparently no potential drop across it.
A practical general-purpose semiconductor diode, however, is quite different in terms of its current-voltage characteristics. Unlike an ideal diode, a practical semiconductor diode does not show infinite conductance on forward biasing but it follows some relations with the forward voltage. In fact, the conduction does not start significantly unless the forward current rises above a certain threshold called knee voltage.
Practical diodes also don’t show infinite resistance on reversed biasing as there is always a small reverse saturation current or leakage current.
Since there is a voltage drop equal to the knee voltage across the diode when it is forward biased. This potential drop produces heat as per the Joule’s heat law. This heat does not only result in unnecessary power loss, but also imposes limitations on the power ratings of the diode.
Due to these limitations of a standard semiconductor diode, ideal diode modules are preferred over general diode in a number of applications.
The basic circuit of an ideal diode module consists of a normal diode connecting the input and output sides of the circuit with its positive end towards the input. There is a power MOSFET connected across the diode with its drain and source connected to the positive and negative sides of the diode, respectively. There is also a control unit which measures the voltage across the diode and controls the gate of the MOSFET accordingly. When the control unit finds a positive potential drop across the diode, it switches ON the FET and the diode is short-circuited, removing the potential drop across it. Thus, heating issues are almost completely eliminated.
In power backup systems and battery charging systems, it is very important to prevent the current from the main power supply from flowing into the backup systems and damaging them. An ideal diode module is highly suitable for this purpose as it does not only prevent the reverse current but also eliminates any power dissipation in the form of heat. The ideal diode module can also be used in electrical systems where non-rechargeable batteries are used as a backup to the main power supply to prevent reverse current from flowing into the batteries and damaging them.
PMIC - OR Controllers, Ideal Diodes
Image |
Part Number |
Manufacturer |
Description |
Package |
Stock |
Quantity |
FET Type | Ratio - Input:Output | Internal Switch(s) | Delay Time - ON | Delay Time - OFF | Current - Output (Max) | Current - Supply | Voltage - Supply | Applications | Operating Temperature | Mounting Type | Package / Case | Supplier Device Package |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Intersil |
IC OR CTRLR SRC SELECT 8SOIC
|
Package: 8-SOIC (0.154", 3.90mm Width) |
Stock5,888 |
|
N and P-Channel | 2:1 | Yes | - | - | 38mA | 1.5µA | 2.5 V ~ 15 V | Battery Backup, Industrial/Automotive, High Current Switch | 0°C ~ 70°C | Surface Mount | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC |
||
ON Semiconductor |
IC OR CTRLR N+1 32PLLP
|
Package: 32-QFN Exposed Pad |
Stock4,160 |
|
N-Channel | N:1 | Yes | 45ns | 35ns | 30A | 1.3mA | 4.8 V ~ 5.2 V | Flyback, Forward Converters | -40°C ~ 125°C | Surface Mount | 32-QFN Exposed Pad | 32-PLLP (9x9) |
||
Maxim Integrated |
IC OR CTRLR SRC SELECT 16DIP
|
Package: 16-DIP (0.300", 7.62mm) |
Stock2,960 |
|
- | 5:5 | Yes | 100ns | - | 300mA | 250µA | 3 V ~ 5.5 V | Battery Backup, Industrial/Automotive, High Current Switch | 0°C ~ 70°C | Through Hole | 16-DIP (0.300", 7.62mm) | 16-PDIP |
||
Linear Technology |
IC OR CTRLR SRC SELECT 24QFN
|
Package: 24-WFQFN Exposed Pad |
Stock2,224 |
|
P-Channel | 3:1 | No | 1.4µs | 700ns | - | 28µA | 2.5 V ~ 36 V | Battery Backup, Handheld/Mobile Devices | -40°C ~ 125°C | Surface Mount | 24-WFQFN Exposed Pad | 24-QFN (4x4) |
||
Linear Technology |
IC OR CTRLR SRC SELECT 24QFN
|
Package: 24-WFQFN Exposed Pad |
Stock5,760 |
|
P-Channel | 3:1 | No | 1.4µs | 700ns | - | 28µA | 2.5 V ~ 36 V | Battery Backup, Handheld/Mobile Devices | 0°C ~ 70°C | Surface Mount | 24-WFQFN Exposed Pad | 24-QFN (4x4) |
||
Maxim Integrated |
IC OR CTRLR N+1 8UMAX
|
Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
Stock6,352 |
|
N-Channel | N:1 | No | - | 200ns | - | 2mA | 3 V ~ 5.5 V | Redundant Power Supplies, Telecom Infrastructure | -40°C ~ 85°C | Surface Mount | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-uMAX |
||
Texas Instruments |
IC OR CTRLR SRC SELECT 8TSSOP
|
Package: 8-TSSOP (0.173", 4.40mm Width) |
Stock7,504 |
|
N-Channel | 2:1 | Yes | 1ms | 5ms | 1.25A | 55µA | 2.8 V ~ 5.5 V | Handheld/Mobile Devices | -40°C ~ 85°C | Surface Mount | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP |
||
Maxim Integrated |
IC OR CTRLR N+1 10UMAX
|
Package: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) |
Stock11,604 |
|
N-Channel | N:1 | No | - | 100ns | - | 2mA | 8 V ~ 13.25 V | Redundant Power Supplies, Telecom Infrastructure | -40°C ~ 85°C | Surface Mount | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | 10-uMAX |
||
Intersil |
IC OR CTRLR N+1 8MSOP
|
Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
Stock5,520 |
|
N-Channel | N:1 | No | - | 65ns | - | 25µA | 3 V ~ 20 V | N+1 Power Supplies, Telecom/Datacom Systems | -40°C ~ 125°C | Surface Mount | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP |
||
Texas Instruments |
IC OR CTRLR SRC SELECT SOT23-5
|
Package: SC-74A, SOT-753 |
Stock5,600 |
|
N and P-Channel | 2:1 | Yes | - | - | 500mA, 100mA | 14µA | 2.7 V ~ 4 V | Handheld/Mobile Devices | -40°C ~ 70°C | Surface Mount | SC-74A, SOT-753 | SOT-23-5 |
||
Texas Instruments |
IC TRPL LOAD SWITCH 8UQFN
|
Package: 8-UFQFN |
Stock6,736 |
|
P-Channel | 3:2 | Yes | 65µs | 32µs | 75mA | 2mA | 2.5 V ~ 12 V | Handheld/Mobile Devices | -40°C ~ 85°C | Surface Mount | 8-UFQFN | 8-UQFN (1.5x1.5) |
||
Texas Instruments |
IC OR CTRLR SRC SELECT 8TSSOP
|
Package: 8-TSSOP (0.173", 4.40mm Width) |
Stock6,096 |
|
N-Channel | 2:1 | Yes | 500µs | 3ms | 750mA | 55µA | 2.8 V ~ 5.5 V | Handheld/Mobile Devices | -40°C ~ 85°C | Surface Mount | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP |
||
Texas Instruments |
IC OR CTRLR N+1 8SOIC
|
Package: 8-SOIC (0.154", 3.90mm Width) |
Stock30,660 |
|
N-Channel | N:1 | No | - | 130ns | - | 4.25mA | 3 V ~ 16.5 V | N+1 Power Supplies, High Availability | -40°C ~ 85°C | Surface Mount | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC |
||
Linear Technology |
IC OR CTRLR N+1 12DFN
|
Package: 12-WFDFN Exposed Pad |
Stock8,184 |
|
N-Channel | N:1 | No | 250ns | 200ns | - | 1.4mA | 2.9 V ~ 18 V | Redundant Power Supplies, Telecom Infrastructure | 0°C ~ 70°C | Surface Mount | 12-WFDFN Exposed Pad | 12-DFN (3x3) |
||
Maxim Integrated |
IC OR CTRLR N+1 16QSOP
|
Package: 16-SSOP (0.154", 3.90mm Width) |
Stock7,904 |
|
N-Channel | N:1 | No | - | 100ns | - | 1.3mA | 7.5 V ~ 37 V | FireWire? | -40°C ~ 85°C | Surface Mount | 16-SSOP (0.154", 3.90mm Width) | 16-QSOP |
||
Intersil |
IC OR CTRLR SRC SELECT 8DIP
|
Package: 8-DIP (0.300", 7.62mm) |
Stock12,342 |
|
N and P-Channel | 2:1 | Yes | - | - | 38mA | 1.5µA | 2.5 V ~ 15 V | Battery Backup, Industrial/Automotive, High Current Switch | 0°C ~ 70°C | Through Hole | 8-DIP (0.300", 7.62mm) | 8-PDIP |
||
Linear Technology |
IC ORING DIODE CTLR TSOT23-6
|
Package: SOT-23-6 Thin, TSOT-23-6 |
Stock14,112 |
|
P-Channel | 2:1 | No | 110µs | 13µs | - | 15µA | 2.5 V ~ 28 V | Handheld, USB Powered Supplies | -40°C ~ 125°C | Surface Mount | SOT-23-6 Thin, TSOT-23-6 | TSOT-23-6 |
||
Linear Technology |
IC OR CTRLR LOAD SHARE 16DFN
|
Package: 16-WFDFN Exposed Pad |
Stock25,200 |
|
N-Channel | 2:1 | No | 400ns | 400ns | - | 2.1mA | 2.9 V ~ 18 V | Redundant Power Supplies, Telecom Infrastructure | -40°C ~ 85°C | Surface Mount | 16-WFDFN Exposed Pad | 16-DFN (4x3) |
||
Linear Technology |
IC OR CTRLR N+1 8MSOP
|
Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
Stock28,182 |
|
N-Channel | N:1 | No | 200µs | 300ns | - | 150µA | 4 V ~ 80 V | Automotive, Redundant Power Supplies, Telecom Infrastructure | -40°C ~ 85°C | Surface Mount | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP |
||
Linear Technology |
IC OR CTRLR SRC SELECT 14DFN
|
Package: 14-WFDFN Exposed Pad |
Stock18,516 |
|
N-Channel | 2:1 | No | - | 300ns | - | 2mA | 48V, -48V | -48V Dist Power Systems, AdvancedTCA? Systems | 0°C ~ 70°C | Surface Mount | 14-WFDFN Exposed Pad | 14-DFN (4x3) |
||
Linear Technology |
IC OR CTRLR SRC SELECT 8MSOP
|
Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
Stock14,748 |
|
P-Channel | 2:1 | No | 600µs | 20µs | - | 31µA | 3 V ~ 36 V | Battery Backup, Industrial/Automotive, High Current Switch | -40°C ~ 125°C | Surface Mount | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP |
||
Texas Instruments |
IC OR CTRLR N+1 14TSSOP
|
Package: 14-TSSOP (0.173", 4.40mm Width) |
Stock157,860 |
|
N-Channel | N:1 | No | - | 130ns | - | 4.25mA | 3 V ~ 16.5 V | N+1 Power Supplies, High Availability | -40°C ~ 85°C | Surface Mount | 14-TSSOP (0.173", 4.40mm Width) | 14-TSSOP |
||
Texas Instruments |
IC OR CTRLR SRC SELECT 8TSSOP
|
Package: 8-TSSOP (0.173", 4.40mm Width) |
Stock3,936 |
|
N-Channel | 2:1 | Yes | 500µs | 3ms | 750mA | 55µA | 2.8 V ~ 5.5 V | Handheld/Mobile Devices | -40°C ~ 85°C | Surface Mount | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP |
||
Texas Instruments |
IC OR CTRLR SRC SELECT 8TSSOP
|
Package: 8-TSSOP (0.173", 4.40mm Width) |
Stock50,544 |
|
N-Channel | 2:1 | Yes | 1ms | 5ms | 1.25A | 55µA | 2.8 V ~ 5.5 V | Handheld/Mobile Devices | -40°C ~ 85°C | Surface Mount | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP |
||
Linear Technology |
IC POWER MANAGEMENT
|
Package: 16-WFDFN Exposed Pad |
Stock3,040 |
|
N-Channel | 2:2 | No | 400ns | 300ns | - | 1.5mA | 2.9 V ~ 18 V | Redundant Power Supplies, Telecom Infrastructure | -40°C ~ 85°C | Surface Mount | 16-WFDFN Exposed Pad | 16-DFN (4x3) |
||
Microchip Technology |
IC SMART SW ORING 3A 2CH 12TQFN
|
Package: - |
Stock7,744 |
|
- | 2:1 | Yes | - | - | 3A | 11µA | 2.8 V ~ 5.5 V | - | -40°C ~ 125°C | - | - | - |
||
Renesas Electronics America |
IC OR CTRLR N+1 8DFN
|
Package: 8-VDFN Exposed Pad |
Stock6,928 |
|
N-Channel | N:1 | No | - | 65ns | - | 25µA | 3 V ~ 20 V | N+1 Power Supplies, Telecom/Datacom Systems | -40°C ~ 125°C | Surface Mount | 8-VDFN Exposed Pad | 8-DFN (3x3) |
||
Renesas Electronics America |
IC OR CTRLR N+1 8MSOP
|
Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
Stock4,416 |
|
N-Channel | N:1 | No | - | 65ns | - | 25µA | 1 V ~ 20 V | N+1 Power Supplies, Telecom/Datacom Systems | -40°C ~ 125°C | Surface Mount | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP |
||
Renesas Electronics America |
IC OR CTRLR N+1 20QFN
|
Package: 20-VQFN Exposed Pad |
Stock11,688 |
|
N-Channel | N:1 | No | 1ms | 250ns | - | 5mA | 9 V ~ 75 V | N+1 Power Supplies, Telecom/Datacom Systems | -40°C ~ 105°C | Surface Mount | 20-VQFN Exposed Pad | 20-QFN-EP (5x5) |
||
Renesas Electronics America |
IC OR CTRLR N+1 8MSOP
|
Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
Stock4,720 |
|
N-Channel | N:1 | No | - | 65ns | - | 25µA | 1 V ~ 20 V | N+1 Power Supplies, Telecom/Datacom Systems | -40°C ~ 125°C | Surface Mount | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP |