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Monolithic Power Systems Inc. MPQ18021HS-A-LF
- Part No.:
- MPQ18021HS-A-LF
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MPQ18021HS-A-LF.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,395
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Product details
Overview
MPQ18021HS-A-LF from Monolithic Power Systems is a high-frequency, 100V-rated, half-bridge N-channel MOSFET gate driver in SOIC8 package, delivering 2.5A peak sink/source current per channel with <5ns high-side/low-side propagation matching and integrated bootstrap diode. It operates from 9–18V VDD, supports 100V switching node voltage, and targets telecom power supplies and avionics DC-DC converters.
For engineers reviewing the MPQ18021HS-A-LF datasheet, MPQ18021HS-A-LF pinout, MPQ18021HS-A-LF application, or MPQ18021HS-A-LF equivalent, key selection criteria include bootstrap diode integration, 16ns propagation delay, UVLO thresholds on both supplies, TTL-compatible dual inputs (INH/INL), and SOIC8 thermal performance (θJA = 90°C/W).
Technical Context
The MPQ18021HS-A-LF implements independent high-side and low-side drivers with level-shifted floating output (DRVH/HO) referenced to SW, enabling operation with up to 100V switching node swing. Its internal bootstrap diode (VF = 0.5V @ 100µA, RD = 2.5Ω @ 100mA) eliminates external diode requirement while maintaining 115V BST voltage range.
UVLO protection activates at 7.4–8.9V on VDD and 6.5–7.7V on (BST–SW), forcing outputs low during undervoltage conditions. Timing control uses separate INH and INL inputs with guaranteed 50ns minimum pulse width and <5ns inter-channel delay mismatch-critical for shoot-through prevention in hard-switched topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 9.0–18V - Enables compatibility with standard 12V/15V bias rails in telecom and industrial DC-DC designs. |
| Max SW Voltage | 100V - Supports primary-side switching in two-switch forward and active-clamp forward converters up to 100V input. |
| Peak Output Current | 2.5A sink/source - Drives 1nF gate load with 12ns/9ns rise/fall times, suitable for fast-switching GaN or SiC FETs. |
| Propagation Delay | 16ns typical - Ensures precise timing alignment between high-side and low-side drive signals at >1MHz switching frequencies. |
| Gate Drive Matching | <5ns skew - Minimizes dead-time uncertainty and prevents shoot-through in half-bridge configurations. |
| Quiescent Current | 150µA - Reduces standby power loss in always-on auxiliary supplies and isolated bias rails. |
| Bootstrap Diode VF | 0.5V @ 100µA - Low forward drop improves bootstrap capacitor recharge efficiency and extends high-side conduction window. |
Pinout & Package
MPQ18021HS-A-LF is housed in a standard SOIC8 package (5.0mm × 6.2mm, 1.27mm pitch) with exposed pad not present; thermal resistance θJA = 90°C/W on 4-layer PCB per JESD51-7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VDD | Low-side supply input | Primary power rail for logic and low-side driver; requires local 0.1µF ceramic decoupling to VSS. |
| 2 BST/HB | Bootstrap supply node | Connects to bootstrap capacitor (typically 0.1µF) between BST and SW; powers high-side driver floating circuitry. |
| 3 DRVH/HO | High-side gate driver output | Level-shifted source/sink output referenced to SW; drives gate of high-side N-MOSFET in half-bridge. |
| 4 SW/HS | Switching node connection | Return path for bootstrap capacitor and reference point for high-side driver; withstands −1.0V to +100V transient swings. |
| 5 INH/HI | High-side enable input | TTL-compatible control signal (VIH ≥ 2.4V); independently enables DRVH output without affecting DRVL. |
| 6 INL/LI | Low-side enable input | TTL-compatible control signal (VIL ≤ 1.4V); independently enables DRVL output without affecting DRVH. |
| 7 VSS | Digital ground reference | Logic and low-side driver return; must be connected to system ground with low-inductance path. |
| 8 DRVL/LO | Low-side gate driver output | Ground-referenced source/sink output; drives gate of low-side N-MOSFET with 2.5A peak current capability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Reduces BOM count by eliminating external Schottky diode; VF = 0.5V @ 100µA ensures efficient bootstrap capacitor recharge. |
| Matched propagation delay | <5ns difference between DRVH and DRVL turn-on/turn-off edges - enables tight dead-time control and robust shoot-through immunity. |
| Independent INH/INL control | Allows asymmetric drive timing and flexible PWM sequencing - essential for active-clamp and resonant topologies requiring non-complementary gate signals. |
| Dual UVLO protection | Separate 7.4–8.9V VDD and 6.5–7.7V (BST–SW) thresholds force both outputs low during supply faults - prevents partial drive and device stress. |
| 100V switching node rating | Supports direct interface with 100V bus systems without level-shifting isolation - simplifies layout in telecom rectifier and avionics DC-DC stages. |
Applications
| Telecom Half-Bridge Power Supplies | Avionics DC-DC Converters |
|---|---|
Use Scenario: 48V input telecom rectifier with 100V-rated half-bridge primary stage operating at 500kHz. IC Role / Device Role / Timing Role: Gate driver providing matched, high-speed turn-on/turn-off control to N-MOSFETs with integrated bootstrap diode and dual UVLO. Use Value: Eliminates external bootstrap diode and reduces gate drive loop inductance, improving EMI and enabling stable 500kHz operation under full load. |
Use Scenario: MIL-STD-704 compliant 270VDC-to-28VDC converter in airborne power distribution units. IC Role / Device Role / Timing Role: High-reliability half-bridge driver with 100V SW rating and −40°C to +125°C junction operation for harsh environment switching. Use Value: Dual UVLO ensures fail-safe shutdown during aircraft power transients; SOIC8 package meets avionics vibration and thermal cycling requirements. |
| Two-Switch Forward Converters | Active Clamp Forward Converters |
Use Scenario: Server PSU using two-switch forward topology with synchronous rectification and 100V input range. IC Role / Device Role / Timing Role: Simultaneous high-side/low-side drive with matched timing for primary-side FETs; supports burst-mode light-load operation. Use Value: 150µA quiescent current minimizes no-load losses; independent INH/INL allows coordinated soft-start sequencing across both switches. |
Use Scenario: High-efficiency 48V–12V intermediate bus converter using active-clamp forward with >50% duty cycle. IC Role / Device Role / Timing Role: Alternating high-side/low-side drive with precise dead-time control to manage transformer reset via Creset. Use Value: <5ns inter-channel skew ensures accurate timing margin for clamp capacitor charging/discharging, preventing core saturation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar half-bridge gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ18021GS-A-LF | Same die, but in 8-pin QFN (3×3mm) with exposed thermal pad; θJA = 45°C/W vs. SOIC8's 90°C/W. | Better thermal performance required for >1A continuous output current or ambient >85°C environments. | Select when board space is constrained and thermal management prioritized over through-hole compatibility. |
| UCC27211DR | TI part with 4A peak current, no integrated bootstrap diode, 125°C max TJ, and different UVLO thresholds (VDD_UVLO = 5.5V). | Requires external bootstrap diode and higher gate drive strength for larger FETs; lower UVLO may reduce fault margin in noisy 12V rails. | Choose when higher peak current or tighter thermal specs are needed, accepting added component count and layout complexity. |
Compared with MPQ18021HS-A-LF, MPQ18021GS-A-LF offers superior thermal dissipation in compact form factor, while UCC27211DR provides higher drive strength at cost of external components and reduced UVLO headroom-making MPQ18021HS-A-LF optimal for cost-sensitive, medium-power 100V half-bridge designs with integrated simplicity.
Availability
MPQ18021HS-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 compliance, and automotive-grade reliability screening.
Supply support for MPQ18021HS-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 MPQ18021 series belongs to MPS's high-voltage gate driver product line, engineered specifically for isolated and non-isolated DC-DC topologies demanding robust 100V switching node tolerance, precise timing, and integrated bootstrap functionality.
FAQ
What is the maximum allowable voltage on the SW pin?
The SW pin supports −1.0V to +100V under recommended operating conditions, with absolute maximum rating of −5.0V to +105V. This enables direct use in 100V-input half-bridge and forward converters without external clamping, provided slew rate remains below 50V/ns to avoid latch-up.
Does MPQ18021HS-A-LF require an external bootstrap diode?
No. The device integrates a low-VF bootstrap diode (0.5V @ 100µA) between VDD and BST pins, eliminating the need for an external Schottky diode. This reduces component count, PCB area, and parasitic inductance in the bootstrap loop.
How is shoot-through prevented in MPQ18021HS-A-LF designs?
Shoot-through is prevented by independent INH and INL inputs, which allow designers to insert programmable dead time between high-side and low-side drive signals. The <5ns inter-channel delay matching ensures minimal timing uncertainty, reducing required dead time and improving efficiency.
What is the purpose of the UVLO on the (BST–SW) supply?
The (BST–SW) UVLO (6.5–7.7V threshold) monitors the bootstrap capacitor voltage relative to the switching node. If insufficient, it forces DRVH low to prevent weak or undefined high-side drive-protecting the external MOSFET from partial turn-on and thermal runaway during startup or overload.
Can MPQ18021HS-A-LF drive GaN HEMTs?
Yes. With 2.5A peak current, 12ns/9ns rise/fall times into 1nF, and 16ns propagation delay, it meets gate drive requirements for common 100V GaN HEMTs. However, layout must minimize gate loop inductance, and external RC snubbers may be needed depending on switching frequency and layout parasitics.
Is there a recommended bootstrap capacitor value?
MPS recommends a 0.1µF X7R ceramic capacitor placed between BST and SW pins, located as close as possible to the IC. This value balances charge replenishment at 500kHz operation with low ESR and minimal voltage droop during high-duty-cycle conditions.
What does "HS-A" signify in the part number MPQ18021HS-A-LF?
"HS" denotes the SOIC8 package variant; "A" indicates the initial revision of the silicon; "-LF" specifies lead-free, RoHS-compliant packaging. The full suffix "-A-LF" confirms compliance with JEDEC J-STD-020 moisture sensitivity level 3 and IPC/JEDEC standard reflow profiles.
MPQ18021HS-A-LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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):
- 115 V
- Rise / Fall Time (Typ):
- 12ns, 9ns
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MPQ18021HS-A-LF FAQ
1.How can I place an order for MPQ18021HS-A-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ18021HS-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 MPQ18021HS-A-LF reliable?
The price and inventory of MPQ18021HS-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 MPQ18021HS-A-LF is usually 5 days.
3.What payment methods are accepted for MPQ18021HS-A-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ18021HS-A-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ18021HS-A-LF?
MPQ18021HS-A-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ18021HS-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 MPQ18021HS-A-LF?
For technical support, including MPQ18021HS-A-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ18021HS-A-LF requirements.
6.How does Aetrix verify that MPQ18021HS-A-LF is sourced from the original manufacturer or authorized distributors?
All MPQ18021HS-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 MPQ18021HS-A-LF meets industry standards.
7.What is the process for return or replacement of MPQ18021HS-A-LF?
All MPQ18021HS-A-LF units undergo pre-shipment inspection (PSI). If there is an issue with MPQ18021HS-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 MPQ18021HS-A-LF part is unused and in its original packaging.
Return procedure for MPQ18021HS-A-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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