MIC4420BN - 6A Peak Low-Side MOSFET Driver | Microchip
N.º de pieza: MIC4420BN ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.45 | $3,45 |
| 10 | $3.05 | $30,50 |
| 100 | $2.58 | $258,00 |
| 500 | $2.21 | $1.105,00 |
| 1.000 | $1.92 | $1.920,00 |
MIC4420BN Descripción general
A low-side gate driver (also called a non-inverting MOSFET driver) is a power-management building block that sits between a low-power control signal (typically from a microcontroller or PWM controller) and the gate of a power MOSFET. Its job is to translate a logic-level PWM input into a high-current drive that can rapidly charge and discharge the MOSFET's gate capacitance, slashing switching losses and eliminating the need for the controller to source/sink gate current directly. Gate drivers belong to the broader power-management IC family and sit alongside voltage regulators, supervisors, and motor drivers.
Key features of the MIC4420BN include a 4.5 V to 18 V supply range, can-to-margin switching speeds with typical rise/fall times in the nanosecond range, and matched propagation delays between the input and output edges. The driver is rated for 6 A peak output current both sourcing and sinking, allowing it to handle high gate-charge MOSFETs at high PWM frequencies. The bipolar/CMOS/DMOS process combines low quiescent current with high peak-current capability and rugged latch-up immunity.
Typical applications include switch-mode power supplies, motor-drive half-bridge low-side drivers, solenoid drivers, and Class D audio amplifier output stages. Because the part is non-inverting, it can drop into circuits designed around the ubiquitous TC4420 footprint without changing the logic polarity, making it a popular first-pass driver in power designs.
Alternativas directas para MIC4420BN — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MIC4420CN
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MIC4420ZN
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MIC4429BN
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MIC4429ZN
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TC4420CPA
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MCP1407-E/P
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MIC4420BN Valores máximos y características eléctricas
| Configuration | Low-Side |
| Channel Type | Single |
| Número de salidas | 1 |
| Peak Output Current | 6 A |
| Supply Voltage Range | 4.5 V to 18 V |
| Input Logic | Non-Inverting |
| Delay Time | 18 ns (typical) |
| Output Stage | Bipolar/CMOS/DMOS |
| Encapsulado | 8-PDIP (0.300 in / 7.62 mm) |
| Tipo de montaje | Through-Hole |
| Temperatura de funcionamiento | -40C to +85C (industrial) |
Configuración de pines de MIC4420BN
| Pin 1 | NC — Not connected (per datasheet) |
| Pin 2 | INPUT — TTL/CMOS logic input (non-inverting) |
| Pin 3 | NC — Not connected (per datasheet) |
| Pin 4 | GND — Ground reference |
| Pin 5 | OUTPUT — Gate drive output to MOSFET gate |
| Pin 6 | VDD — Supply voltage (4.5 V to 18 V) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | NC — Not connected (per datasheet) |
Aplicaciones típicas
MIC4420BN es adecuado para 6 aplicacións: Switch-Mode Power Supply (SMPS) Low-Side Drive, Brushed DC Motor and Solenoid Driver, Class D Audio Amplifier Output Stage, Half-Bridge and Synchronous Rectifier Drive, Line-Operated Relay and Lamp Dimmer, Industrial Control and Test Equipment.
Switch-Mode Power Supply (SMPS) Low-Side Drive
The MIC4420BN is well suited to low-side drive of the main switching MOSFET in non-isolated SMPS topologies such as buck, boost, and flyback converters. Its 6 A peak output current charges and discharges the gate capacitance in tens of nanoseconds, keeping switching losses low even at multi-hundred-kHz PWM frequencies; the 4.5 V to 18 V supply range covers 5 V, 12 V, and 15 V rails that designers prefer as constant current. Placed between the PWM controller and the low-side MOSFET gate, the driver eliminates the controller's need to source/sink gate current directly. Unlike a logic-level MOSFET driven directly, this part delivers matched rise/fall times for predictable dead-time behavior.
Recomendado
Brushed DC Motor and Solenoid Driver
Inductive loads such as brushed DC motors and solenoids need a driver that can both source high inrush current during turn-on and sink the inductive kick during turn-off. The MIC4420BN's 6 A peak current and 4.5 V to 18 V supply make it a strong fit for low-side PWM control of these loads. According to the manufacturer datasheet, the part tolerates inductive transients and is rated for the rugged switching environment typical of motor windings; the input can swing to -5 V without damage, simplifying ground-referenced microcontroller drive. Designers often pair it with a flyback diode across the load.
Recomendado
Class D Audio Amplifier Output Stage
Class D audio amplifiers require a low-side gate driver that can switch the output MOSFETs at hundreds of kHz with very low dead-time to minimize crossover distortion. The MIC4420BN's matched propagation delays and 6 A peak drive let it source and sink the gate charge of large output FETs with minimal distortion contribution. Per the FindIC cross-reference to TC4420CPA, this driver family is widely used as the low-side half of Class D output stages; it accepts logic-level inputs from common modulator ASICs and runs from a 12 V or 18 V analog rail.
Recomendado
Half-Bridge and Synchronous Rectifier Drive
Synchronous rectifier MOSFETs in buck converters and half-bridge stages need a driver that delivers matched rise/fall edges so that dead-time is symmetric and shoot-through is minimized. The MIC4420BN's bipolar/CMOS/DMOS process and matched delay times give it the symmetry that synchronous stages need, and its 6 A peak drive handles high-side bootstrap refresh when paired with a charge pump. Designers often pair the MIC4420BN as the low-side driver with a MIC4429BN inverting driver for the high-side bootstrap path, both in 8-PDIP.
Recomendado
Line-Operated Relay and Lamp Dimmer
In line-operated solid-state relay (SSR) and lamp dimmer designs, the MIC4420BN can drive the gate of a TRIAC or large IGBT from a low-voltage logic signal, providing galvanic isolation-friendly control. The 4.5 V to 18 V supply range and 6 A peak drive handle the gate-charge of high-current switching devices, while the TTL-compatible input accepts logic-level signals directly from microcontrollers. Per the manufacturer datasheet, the part is rated for the inrush conditions of phase-angle control and zero-cross switching.
Recomendado
Industrial Control and Test Equipment
Industrial control and test equipment frequently need a high-current, low-side MOSFET or IGBT driver to switch actuator loads, signal relays, or power-rail test points. The MIC4420BN's industrial -40C to +85C operating range, through-hole package, and 6 A peak output make it a fit for bench-top instruments and factory-floor controllers. According to the manufacturer datasheet, the bipolar/CMOS/DMOS output stage is latch-up immune and tolerates the noisy ground environments typical of industrial control cabinets.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MIC4420BN — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MIC4420CN | MIC4420ZN | MIC4429BN | MIC4429ZN | TC4420CPA | MCP1407-E/P |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-PDIP (0.300 in) | 8-SOIC (surface-mount) | 8-SOIC (surface-mount) | 8-PDIP (0.300 in) - same | 8-SOIC (surface-mount) | 8-PDIP (0.300 in) - same | 8-PDIP (0.300 in) - same |
| Peak Output Current | 6 A | 6 A | 6 A | 6 A | 6 A | 6 A | 6 A |
| Supply Voltage Range | 4.5 V to 18 V | 4.5 V to 18 V | 4.5 V to 18 V | 4.5 V to 18 V | 4.5 V to 18 V | 4.5 V to 18 V | 4.5 V to 18 V |
| Input Logic | Non-Inverting | Non-Inverting | Non-Inverting | Inverting | Inverting | Non-Inverting | Non-Inverting |
| Number of Channels | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Configuration | Low-Side | Low-Side | Low-Side | Low-Side | Low-Side | Low-Side | Low-Side |
Diferenciadores clave
- Non-inverting logic matches TC4420 footprint (frente a MIC4429BN)
- 8-PDIP through-hole package for hand-proven designs (frente a MIC4420CN)
- 6 A peak output from the original Micrel/Microchip family (frente a MCP1407-E/P)
Notas de diseño
Place a low-ESR decoupling capacitor (>=1 uF) as close to the VDD pin as possible to provide the high-peak gate-charge current without causing supply transients. The MIC4420BN can draw 6 A peaks from VDD during gate switching; long VDD traces add parasitic inductance that causes VDD droop and reduces noise margin on the input stage.
Keep the gate-drive trace short and wide; gate drive traces longer than ~25 mm introduce parasitic inductance that resonates with the MOSFET Ciss and causes ringing above VDD that can damage the driver output. According to the Microchip datasheet, the part uses double bonding on supply, ground, and output pins to minimize parasitic lead inductance - extend that benefit by laying out short, matched gate loops.
Do not exceed the 18 V absolute maximum VDD rating; the MIC4420BN is not a 20 V or 24 V part and will suffer output-stage breakdown if VDD is overdriven. Also, avoid driving the input below -5 V or above VDD + 0.3 V to prevent input-stage damage. Confirm lead-free vs leaded finish ordering code when RoHS is required.
Información de cumplimiento
RoHS, REACH, and halogen-free status for MIC4420BN are not explicitly stated in the provided verified web data. Most Microchip MIC4420 PDIP variants are available in both leaded and lead-free finishes; confirm the finish code at order entry. AEC-Q100 is not applicable - this part is not qualified to automotive standards.
