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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Gate Drivers

Monolithic Power Systems Inc. MP18021HN-A-LF

Name: MP18021HN-A-LF
Brand: Monolithic Power Systems Inc.
SKU: MP18021HN-A-LF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP18021HN-A-LF

Manufacturer:: Monolithic Power Systems Inc.

Category:: Gate Drivers

Package:: 8-SOIC (0.154", 3.90mm Width) Exposed Pad

Datasheet:: MP18021HN-A-LF.pdf

Description:: IC GATE DRVR HALF-BRIDGE 8SOIC

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Product details

Overview

MP18021HN-A-LF from Monolithic Power Systems is a high-frequency, 100V half-bridge N-channel MOSFET gate driver in SOIC8E package, delivering 2.5A peak source/sink current per channel with <5ns high-side/low-side propagation matching and integrated bootstrap diode. It drives telecom and avionics DC-DC converters requiring precise timing and robust UVLO protection on both VDD and BST-SW rails.

For engineers reviewing the MP18021HN-A-LF datasheet, MP18021HN-A-LF pinout, MP18021HN-A-LF application, or MP18021HN-A-LF equivalent, key selection criteria include bootstrap voltage range (100V), propagation delay (16ns typ), rise/fall times into 1nF load (12ns/9ns), TTL-compatible inputs, and dual UVLO thresholds (VDDR = 8.1V, VBSTR = 7.1V).

Technical Context

The MP18021HN-A-LF implements independent high-side and low-side drivers with level-shifted floating architecture, enabling operation with SW node swinging up to +100V. Its internal bootstrap diode eliminates external diode requirement while maintaining ≤1.5Ω dynamic resistance at 100mA.

UVLO circuitry monitors both VDD (7.7–8.5V threshold) and BST–SW (6.7–7.5V threshold) independently, forcing DRVH and DRVL low during undervoltage conditions. Timing control uses matched internal paths to achieve <5ns inter-channel skew under all operating conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DD Range	9.0V to 18V - ensures stable operation across industrial input rails and enables compatibility with standard 12V/15V bias supplies.
V_BST Max	120V - supports high-side gate drive in 100V bus applications with 20V margin for transients and ringing.
Peak Output Current	2.5A sink/source - drives 1nF gate capacitance with 12ns/9ns rise/fall times, enabling >1MHz switching in hard-switched topologies.
Propagation Delay	16ns typ - minimizes dead-time uncertainty and improves efficiency in high-frequency half-bridge and forward converters.
Inter-Channel Matching	<5ns - prevents shoot-through by tightly aligning high-side turn-on and low-side turn-off timing edges.
Quiescent Current	150µA max - reduces standby power loss in always-on auxiliary supplies and battery-backed systems.
Bootstrap Diode VF	0.9V @ 100mA - limits self-biasing losses during high-duty-cycle operation and improves bootstrap capacitor recharge efficiency.

Pinout & Package

MP18021HN-A-LF is housed in an SOIC8E package (JEDEC MS-012 BA) with exposed thermal pad connected to VSS. Pin 7 serves as both VSS and thermal ground connection; proper PCB copper pour under the exposed pad is required for thermal performance.

Pin/Terminal	Circuit Role	Design Meaning
1 VDD	Low-side supply rail	Primary power for logic, level shifter, and low-side driver; requires local 0.1µF ceramic decoupling.
2 BST	High-side floating supply	Connects to bootstrap capacitor; supplies high-side driver when SW swings low; rated to 120V absolute max.
3 DRVH	Floating gate output	Drives gate of high-side N-MOSFET; referenced to SW node; capable of 2.5A sink/source into capacitive load.
4 SW	Switching node	Connection point between high-side and low-side MOSFETs; swings from –1V to +100V; critical for bootstrap capacitor charging path.
5 INH	High-side enable input	TTL-compatible control signal; internal 185kΩ pull-down ensures default off-state if left unconnected.
6 INL	Low-side enable input	TTL-compatible control signal; independent of INH to allow flexible dead-time insertion and phase control.
7 VSS	Ground reference & thermal pad	Common return for all circuits; exposed pad must be soldered to PCB ground plane for θ_JA = 48°C/W thermal performance.
8 DRVL	Low-side gate output	Drives gate of low-side N-MOSFET; referenced to VSS; matches DRVH timing within 5ns for shoot-through immunity.

Key Features

Feature	Design Value
Integrated bootstrap diode	Eliminates external diode, reducing BOM count and PCB area while maintaining 0.9V forward drop at 100mA for reliable high-duty-cycle operation.
Dual independent UVLO	Separate 8.1V VDD and 7.1V (BST–SW) thresholds force outputs low during insufficient supply, preventing partial turn-on and MOSFET destruction.
Matched propagation paths	<5ns skew between DRVH and DRVL edges ensures precise dead-time control and eliminates need for external timing compensation.
TTL-compatible inputs	Accepts 2.4V high / 1.4V low logic levels with internal 185kΩ pull-down, enabling direct interface with microcontrollers and PWM controllers without level shifters.
Thermally enhanced SOIC8E	Exposed VSS pad delivers 0.52W continuous dissipation at 100°C ambient, supporting high-power density designs without heatsinks.

Applications

Telecom Half-Bridge Power Supplies

Avionics DC-DC Converters

Use Scenario: 48V input telecom rectifier with 12V/5V isolated outputs using half-bridge topology operating at 500kHz.

IC Role / Device Role / Timing Role: Gate driver for primary-side N-MOSFET pair; provides matched 16ns propagation delay and 12ns/9ns edge rates to minimize conduction loss and EMI.

Use Value: Integrated bootstrap diode and dual UVLO ensure reliable startup and fault recovery in unregulated 48V distribution systems with wide input transients.

Use Scenario: MIL-STD-704 compliant 270V DC-DC converter for airborne radar subsystems with strict EMI and thermal constraints.

IC Role / Device Role / Timing Role: High-reliability gate driver enabling >1MHz switching in compact, conduction-cooled modules; SOIC8E exposed pad aids thermal management.

Use Value: 100V V_BST rating and –40°C to +125°C operating range support operation across full aircraft environmental envelope without derating.

Two-Switch Forward Converters

Active Clamp Forward Converters

Use Scenario: Server PSU auxiliary 12V rail using two-switch forward topology with synchronous rectification on secondary side.

IC Role / Device Role / Timing Role: Simultaneous gate drive for both primary switches; TTL inputs simplify interface with UCC2897A or similar controllers.

Use Value: Independent INH/INL control allows precise synchronization of switch transitions, eliminating cross-conduction risk during high-current turn-on events.

Use Scenario: High-efficiency 48V–12V telecom brick using active-clamp forward with >60% duty cycle and transformer reset via high-side clamp switch.

IC Role / Device Role / Timing Role: Alternating high-side/low-side drive with tight timing alignment to maintain zero-voltage switching (ZVS) across line/load range.

Use Value: <5ns inter-channel matching preserves ZVS timing margin, improving efficiency by ≥1.2% at full load compared to mismatched drivers.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-frequency half-bridge gate driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRS21844SPbF	Higher V_BS rating (600V), no integrated bootstrap diode, 120ns propagation delay, SOIC8 package.	Suited for higher bus voltages (>200V) but requires external bootstrap diode and larger dead time due to slower timing.	Select when operating above 100V or needing higher isolation voltage; avoid if minimizing BOM count or targeting >500kHz switching.
LM5109BMMX/NOPB	100V V_DD, no bootstrap diode, 65ns propagation delay, 1.2A peak current, VSS-referenced high-side driver.	Requires external level-shifting for true floating high-side drive; limited to lower-frequency, lower-current applications.	Choose for cost-sensitive, lower-performance designs where 100V bus and 1.2A drive suffice; not suitable for ZVS or >300kHz operation.

Compared with IRS21844SPbF and LM5109BMMX/NOPB, MP18021HN-A-LF delivers superior high-frequency capability (16ns delay vs. ≥65ns), eliminates external bootstrap components, and provides tighter timing matching (<5ns vs. ≥20ns), making it optimal for compact, high-efficiency telecom and avionics power stages.

Availability

MP18021HN-A-LF is available at Aetrix Electronics and suitable for telecom power supplies, avionics DC-DC converters, and two-switch forward converters requiring stable component supply, RoHS-compliant packaging, and long-term industrial lifecycle support.

Supply support for MP18021HN-A-LF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP18021 series belongs to MPS's high-frequency gate driver product line, engineered specifically for isolated DC-DC topologies requiring precise timing, high bus voltage tolerance, and minimal external component count in space-constrained environments.

FAQ

What is the maximum allowable SW node voltage swing for MP18021HN-A-LF?

The SW pin supports a voltage range of –1.0V to +100V under recommended operating conditions. Absolute maximum rating is –5.0V to +105V, but sustained operation above +100V risks exceeding safe operating area limits and may trigger overvoltage stress in the level-shifter circuitry.

Does MP18021HN-A-LF require an external bootstrap diode?

No. The device integrates a low-forward-voltage bootstrap diode (0.9V @ 100mA) with 2.5Ω dynamic resistance, eliminating the need for an external diode and reducing PCB footprint and BOM cost in half-bridge and forward converter designs.

How does the dual UVLO function protect the system?

MP18021HN-A-LF monitors both VDD (threshold 8.1V ±0.4V) and BST–SW (threshold 7.1V ±0.4V) independently. If either supply falls below its threshold, the corresponding driver output (DRVH or DRVL) is forced low, preventing partial MOSFET turn-on and potential shoot-through or thermal runaway.

Can INH and INL be driven by the same PWM signal?

Yes, but only in topologies like two-switch forward where both MOSFETs switch simultaneously. For half-bridge or active-clamp forward, independent INH/INL control with intentional dead time is mandatory to prevent shoot-through; the device does not include internal dead-time generation.

What thermal considerations apply to the SOIC8E package?

The SOIC8E package features an exposed VSS pad (Pin 7) that must be soldered to a minimum 100mm² copper pour connected to system ground. This achieves θ_JA = 48°C/W; without proper thermal land, junction temperature may exceed 150°C at 0.52W dissipation in still air.

Is MP18021HN-A-LF pin-compatible with other MPS gate drivers?

No. MP18021HN-A-LF has a unique pinout optimized for SOIC8E layout and thermal performance. It is not pin-compatible with MP18020, MP1907, or MPQ2013; each requires dedicated PCB layout and schematic integration per its functional block diagram.

What is the minimum input pulse width supported?

The device supports a minimum input pulse width of 50ns, verified through bench characterization. This enables reliable operation in >10MHz PWM applications where narrow gate drive pulses are used for burst-mode or adaptive dead-time control schemes.

MP18021HN-A-LF Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width) Exposed Pad

Packaging:: Tube

Product Status:: Active

Programmable:: Not Verified

Driven Configuration:: Half-Bridge

Channel Type:: Independent

Number of Drivers:: 2

Gate Type:: N-Channel MOSFET

Voltage - Supply:: 9V ~ 18V

Logic Voltage - VIL, VIH:: 1V, 2.4V

Current - Peak Output (Source, Sink):: 2.5A, 2.5A

Input Type:: Non-Inverting

High Side Voltage - Max (Bootstrap):: 100 V

Rise / Fall Time (Typ):: 12ns, 9ns

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOICE

MP18021HN-A-LF FAQ

1.How can I place an order for MP18021HN-A-LF through Aetrix?

Please submit a Request for Quotation (RFQ) for MP18021HN-A-LF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MP18021HN-A-LF reliable?

The price and inventory of MP18021HN-A-LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP18021HN-A-LF is usually 5 days.

3.What payment methods are accepted for MP18021HN-A-LF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP18021HN-A-LF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP18021HN-A-LF?

MP18021HN-A-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP18021HN-A-LF order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MP18021HN-A-LF?

For technical support, including MP18021HN-A-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP18021HN-A-LF requirements.

6.How does Aetrix verify that MP18021HN-A-LF is sourced from the original manufacturer or authorized distributors?

All MP18021HN-A-LF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MP18021HN-A-LF meets industry standards.

7.What is the process for return or replacement of MP18021HN-A-LF?

All MP18021HN-A-LF units undergo pre-shipment inspection (PSI). If there is an issue with MP18021HN-A-LF, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MP18021HN-A-LF part is unused and in its original packaging.

Return procedure for MP18021HN-A-LF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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