MIC4120YML-TR - 6A Low-Side MOSFET Gate Driver | Microchip
料号： MIC4120YML-TR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.45 | $1.45 |
| 10 | $1.31 | $13.10 |
| 100 | $1.17 | $117.00 |
| 500 | $1.05 | $525.00 |
| 1,000 | $0.95 | $950.00 |
MIC4120YML-TR 概述
A low-side MOSFET driver is a power-management interface IC that translates logic-level control signals into the high-current gate charge and discharge currents needed to rapidly switch power MOSFETs referenced to ground. Within the signal-chain hierarchy, it sits between a PWM controller or microcontroller GPIO and the power MOSFET gate, providing voltage regulation-independent drive strength that logic outputs alone cannot deliver.
Key features include 6 A peak output current capable of driving the largest MOSFETs with an improved safe operating margin, logic-compatible input thresholds accepting any input from 2.4 V to VS without external speed-up capacitors or resistor networks, and negative input voltage protection of up to 5 V below ground. The non-inverting output polarity simplifies firmware development compared with inverting driver alternatives.
Architecturally, the MIC4120 is an improved version of the popular MIC4420, incorporating proprietary input circuits that tolerate input undershoot and latch-up-resistant output stages. These circuits protect against damage from electrostatic discharge and electrical overstress, making the part tough and efficient in demanding switching environments. The MLF package offers low inductance for fast gate-current delivery.
Typical applications include switch-mode power supplies, DC-DC converter primary-side switching, motor drive gate interfaces, and class-D amplifier output stages where high peak gate current shortens switching transitions and reduces switching losses.
Design consideration: keep the driver gate trace short and place a low-ESR decoupling capacitor close to the supply pin, because 6 A peak gate currents can induce significant ground bounce in long loops.
This page synthesizes distributor pricing, drop-in alternatives, pinout guidance, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： MIC4120YML-TR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
MIC4129YML-TR
✅ 直接替换📋 参考替代料（不在目录中）
MIC4120YML
✅ 直接替换📋 参考替代料（不在目录中）
UCC27321P
✅ 直接替换📋 参考替代料（不在目录中）
MIC4120YML-TR 最大额定值与电气特性
| 输出配置 | Single, low-side |
| Peak Output Current | 6 A |
| Input Logic Polarity | Non-inverting |
| Input Logic Threshold | 2.4 V to VS (TTL/CMOS compatible) |
| Negative Input Swing Tolerance | -5 V |
| Number of Drivers | 1 |
| 封装 | 8-MLF (2x2 mm) / DFN-8 |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel (TR suffix) |
| RoHS 状态 | Compliant |
| REACH Status | Compliant |
| Successor To | MIC4420 (improved version) |
MIC4120YML-TR 8-mlf (2x2 mm) / dfn-8 引脚配置指南
MIC4120YML-TR（8-mlf (2x2 mm) / dfn-8 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： MIC4120YML-TR.
请参阅 数据手册 以查看完整引脚配置。
安全工作区 (Output Stage)
典型应用
MIC4120YML-TR 适用于 6 应用s: Switch-Mode Power Supplies, DC-DC Converter Primary-Side Switching, Motor Drive Gate Interfaces, Class-D Audio Amplifier Output Stages, Relay and Solenoid Low-Side Switching, Test and Measurement Instrumentation.
Switch-Mode Power Supplies
In switch-mode power supplies, the MIC4120YML-TR serves as the low-side gate driver between the PWM controller and the primary switching MOSFET. Its 6 A peak output current rapidly charges and discharges large MOSFET gate capacitances, shortening the Miller plateau and cutting switching losses that dominate efficiency at high frequency. According to the Microchip datasheet, the driver accepts any logic input from 2.4 V to VS without speed-up capacitors, allowing direct connection to common PWM controllers. The -5 V negative input tolerance protects against ground-bounce undershoot during hard switching. Place the driver within millimeters of the MOSFET gate with a local low-ESR decoupling capacitor to handle the transient gate currents cleanly.
推荐
DC-DC Converter Primary-Side Switching
For buck, boost, and flyback DC-DC converters, the MIC4120YML-TR drives the low-side power MOSFET with enough gate current to minimize transition time. The 6 A peak capability supports the largest MOSFETs with an improved safe operating margin per the Microchip datasheet, which reduces resistive and capacitive switching losses at load. The non-inverting logic lets the microcontroller or PWM IC command gate state directly without firmware polarity compensation. The compact 8-MLF (2x2 mm) package suits dense point-of-load converter layouts, and the improved-generation input protection survives the electrical noise typical of converter power stages. Estimated gate-drive power scales with Qg x fsw x VDD, so verify driver dissipation at your switching frequency.
推荐
Motor Drive Gate Interfaces
In DC and brushless motor drives, the MIC4120YML-TR interfaces PWM logic to the gate of low-side MOSFET switches in H-bridge and three-phase inverter legs. Fast 6 A peak gate drive shortens switching edges, reducing switching losses in motors driven at high PWM frequencies, while the non-inverting input keeps firmware logic straightforward. Per the Microchip datasheet, the input tolerates -5 V underswing, a common stress in motor bridges where parasitic inductance in high-current paths pulls the driver input below ground during commutation. For a compact 2x2 mm footprint, the driver fits tightly between the gate resistor and the MOSFET source return. Keep per-phase gate loops symmetrical to balance switching times across phases.
推荐
Class-D Audio Amplifier Output Stages
Class-D amplifier output stages switch power MOSFETs at hundreds of kilohertz, where gate-drive speed directly sets distortion and efficiency. The MIC4120YML-TR provides 6 A peak current that snaps the output FETs through the Miller region, minimizing crossover conduction and heat. Its logic input accepts 2.4 V to VS signals directly from the modulator IC without external conditioning per the Microchip datasheet, and the -5 V input tolerance rides out switching-induced ground noise inherent in Class-D power stages. The small 8-MLF (2x2 mm) package permits placement immediately at the gate node, keeping the high-di/dt loop minimal for lower EMI. Non-inverting polarity simplifies matching the modulator output to gate timing.
推荐
Relay and Solenoid Low-Side Switching
Driving relay coils and solenoids requires a rugged low-side switch with substantial gate drive; the MIC4120YML-TR fills this role by driving a large power MOSFET at 6 A peak gate current, ensuring a fast, low-resistance turn-on that limits inrush heating. The improved-generation MIC4120 input protection, including tolerance of -5 V undershoot, suits the noisy inductive-load environment where flyback transients and ground lift are common, per the Microchip datasheet. The non-inverting input allows direct GPIO control from a microcontroller at 2.4 V or higher logic levels. Although the inductive load, not the driver, sets the switching speed, a well-driven FET minimizes dwell in the linear region during turn-on. Add a flyback diode or TVS across the coil.
推荐
Test and Measurement Instrumentation
Bench supplies, electronic loads, and automated test equipment use the MIC4120YML-TR to switch discharge MOSFETs and protection FETs with precise timing. The 6 A peak drive ensures repeatable switching edges for calibration-stable pulse generators and load steps, while the direct 2.4 V logic interface connects cleanly to FPGA or microcontroller control without level-shift networks, as specified in the Microchip datasheet. The -5 V negative input tolerance protects the driver from the ground transients typical of high-current pulsed loads. The leadless 8-MLF (2x2 mm) package keeps parasitic inductance low so measured switching waveforms remain clean for instrumentation applications. Its improved safe-operating-margin output stage adds robustness against accidental shorted-load events.
推荐
推荐产品汇总
工程参考数据： MIC4120YML-TR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MIC4129YML-TR | MIC4120YML | UCC27321P |
|---|---|---|---|---|
| Package | 8-MLF (2x2 mm) / DFN-8 | 8-MLF (2x2 mm) / DFN-8 - same | 8-MLF (2x2 mm) / DFN-8 - same | 8-SOIC - verify land pattern before reuse |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Texas Instruments |
| Generation | Improved version of MIC4420 | Improved version of MIC4429 | Improved version of MIC4420 (standard packaging) | TI dual-driver family |
关键差异点
- Non-inverting logic polarity （对比 MIC4129YML-TR)
- Improved-generation robustness （对比 MIC4420)
- Compact 2x2 mm leadless footprint （对比 UCC27321P)
设计说明
Minimize the gate-drive loop: place the MIC4120YML-TR as close as possible to the MOSFET gate and source return. With 6 A peak gate currents, even a few nanohenries of trace inductance causes gate ringing and possible overshoot. Use a dedicated low-ESR/low-ESL ceramic decoupling capacitor (typically 0.1 uF to 1 uF plus bulk) within 2-3 mm of the VDD pin. The leadless 2x2 mm MLF package keeps internal inductance low, but PCB layout must match; add a via-stitched ground return under the part for the high-di/dt source current path.
Do not confuse MIC4120 (non-inverting) with MIC4129 (inverting) - both share the same 6 A rating and MLF footprint, and a substitution silently flips gate polarity, which can short a half-bridge at power-up. Also, do not assume the MLF pinout matches the older 8-pin SOIC MIC4420 land pattern; verify against the Microchip datasheet pin diagram. Input undershoot protection extends to -5 V, but sustained negative or above-VS inputs remain outside absolute maximum ratings.
Estimated: driver dissipation is approximately Qg x fsw x VDD plus quiescent loss. For example, driving a 60 nC MOSFET at 500 kHz from a 12 V supply dissipates roughly 0.36 W in the driver (60e-9 x 500e3 x 12). The small 2x2 mm MLF has limited thermal dissipation capability, so rely on the exposed pad and ground pour for heat spreading, and check junction temperature against the datasheet thermal resistance at your airflow condition.
The input tolerates logic from 2.4 V to VS and swings to -5 V, but slow, noisy edges can still cause multiple triggering. Keep the input trace away from the gate node to avoid coupling from the high-current output back into the input; if the PWM source is remote, add a small local RC filter while respecting rise-time requirements for the target switching frequency.
合规信息
EU RoHS and REACH compliance per Abacus Technologies listing; DRC conflict status listed as conflict free or undeterminable. AEC-Q100 qualification not stated in provided data.
