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Monolithic Power Systems Inc. MP1921HQE-A-LF-Z
- Part No.:
- MP1921HQE-A-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Gate Drivers
- Package:
- 9-VFDFN Exposed Pad
- Datasheet:
-
MP1921HQE-A-LF-Z.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 9QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,759
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Product details
Overview
MP1921HQE-A-LF-Z from Monolithic Power Systems is a high-frequency, 100V half-bridge gate driver IC for N-channel MOSFETs, featuring independent high-side and low-side control with <5ns propagation matching, integrated bootstrap diode, and dual UVLO protection on VDD and BST-SW. It delivers 2.5A peak sink/source current and drives 1nF loads with 12ns/9ns rise/fall times at 12V VDD in telecom DC-DC power supplies.
For engineers reviewing the MP1921HQE-A-LF-Z datasheet, MP1921HQE-A-LF-Z pinout, MP1921HQE-A-LF-Z application, or MP1921HQE-A-LF-Z equivalent, key selection criteria include bootstrap voltage range (120V), propagation delay (16ns typ), gate drive matching (<5ns), thermal resistance (θJA = 50°C/W), and QFN9 (3×3mm) package compatibility with high-density PCB layouts.
Technical Context
The MP1921HQE-A-LF-Z implements a level-shifted floating driver architecture to enable high-side N-MOSFET control in half-bridge topologies, with independent TTL-compatible INH/INL inputs and matched timing paths ensuring shoot-through prevention via precise dead-time management. Its internal bootstrap diode eliminates external diode requirements while supporting up to 100V SW node voltage swing.
UVLO thresholds are set at 8.1V (VDD) and 7.1V (BST–SW) with 0.5V/0.55V hysteresis, forcing both DRVH and DRVL low during undervoltage conditions. The device operates across –40°C to +125°C junction temperature with 9–18V recommended VDD supply range and supports switching frequencies up to 500kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VSW Max | +100V - Enables use in 48V telecom and industrial bus systems with margin for transient spikes. |
| VBST Range | –0.3V to +120V - Supports high-side gate drive up to 100V high-side rail with 20V headroom. |
| Propagation Delay | 16ns typical - Ensures tight timing control in >1MHz-class resonant and ZVS converters. |
| Gate Drive Matching | <5ns - Minimizes timing skew between high-side and low-side outputs to prevent shoot-through. |
| Rise/Fall Time | 12ns/9ns @ 1nF - Delivers fast edge rates for efficient switching of medium-power MOSFETs. |
| IQ (VDD) | 150µA max - Reduces standby power loss in always-on auxiliary supplies and hold-up circuits. |
| Thermal Resistance θJA | 50°C/W - Matches QFN9 (3×3mm) package capability for 2.5W dissipation at 25°C ambient. |
Pinout & Package
MP1921HQE-A-LF-Z is housed in a 3×3mm QFN9 package with exposed thermal pad. Pin 1 is marked by index area; pins 5 and 6 are NC (no connection). The exposed pad must be soldered to VSS for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Low-side supply input | Provides power to logic and low-side driver; requires local 0.1µF decoupling to VSS. |
| BST (Pin 2) | Bootstrap supply input | Charged via internal diode from VDD; supplies floating high-side driver stage. |
| DRVH (Pin 3) | Floating high-side gate output | Drives gate of high-side N-MOSFET referenced to SW node; rated for 2.5A sink/source. |
| SW (Pin 4) | Switching node connection | Connects to source of high-side MOSFET and drain of low-side MOSFET; handles 100V transients. |
| NC (Pin 5) | No connection | Internally unconnected; must remain floating or tied to VSS per layout best practice. |
| NC (Pin 6) | No connection | Internally unconnected; no routing or biasing required. |
| INH (Pin 7) | High-side input control | TTL-compatible signal enabling DRVH; independent of INL for flexible dead-time programming. |
| INL (Pin 8) | Low-side input control | TTL-compatible signal enabling DRVL; logic high pulls DRVL high, low pulls it low. |
| VSS (Pin 9) | Ground reference / thermal pad | Common return for all circuitry; exposed pad must be soldered to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Eliminates external diode, reducing BOM count and layout area while maintaining 100mA forward current capability. |
| Dual UVLO protection | Independent 8.1V VDD and 7.1V (BST–SW) thresholds prevent erratic operation during brown-out or bootstrap capacitor discharge. |
| Matched propagation paths | <5ns skew between DRVH and DRVL edges enables reliable dead-time implementation without external delay compensation. |
| 120V BST voltage rating | Supports high-side gate drive in 100V bus applications with 20V safety margin against overshoot and ringing. |
| 1.5A/2.5A peak drive current | Delivers fast turn-on/turn-off of 1nF gate capacitance at 12V/16V VDD, minimizing conduction losses in hard-switched bridges. |
Applications
| Telecom Half-Bridge PSU | Avionics DC-DC Converter |
|---|---|
|
Use Scenario: 48V input, 12V output half-bridge converter in telecom rectifier modules operating at 300–500kHz. IC Role / Device Role / Timing Role: Gate driver controlling synchronous N-MOSFET pair; provides matched timing and bootstrap charging for high-side switch. Use Value: 16ns propagation delay and <5ns matching reduce dead-time overhead, improving efficiency by ~0.8% at full load versus mismatched drivers. |
Use Scenario: MIL-STD-704 compliant 270V DC-DC converter for airborne power distribution units with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: High-reliability gate driver enabling ZVS operation in phase-shifted full-bridge derivatives using half-bridge control logic. Use Value: 120V BST rating and –40°C to +125°C operation ensure robustness across aircraft environmental profiles without derating. |
| Two-Switch Forward Converter | DC Motor Driver (Brushed) |
|
Use Scenario: 100V input, isolated 24V output two-switch forward converter for industrial PLC power supplies. IC Role / Device Role / Timing Role: Simultaneous gate drive for both primary-side switches with coordinated INH/INL signals from PWM controller. Use Value: Dual UVLO prevents partial switching during input dips, avoiding transformer saturation and core reset failure. |
Use Scenario: 24–48V brushed DC motor H-bridge driver in automated guided vehicle (AGV) motion control with regenerative braking. IC Role / Device Role / Timing Role: Half-bridge driver stage controlling upper/lower quadrant MOSFETs; INH/INL driven by microcontroller PWM with dead-time insertion. Use Value: 2.5A peak current and fast 12ns/9ns edges support 50kHz PWM without gate drive bottleneck, enabling smooth torque control. |
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 |
|---|---|---|---|
| MP1921HQ-A | Same die, QFN8 (3×3mm) package with 8-pin layout (no NC pins); θJA = 50°C/W, identical electrical specs. | Lacks NC pins; slightly smaller footprint but same thermal performance; no pin 5/6 isolation for noise-sensitive routing. | Select when board space is constrained and NC pin isolation is not required for EMI mitigation. |
| MP1921HR-A | Same die, QFN10 (4×4mm) package; θJA = 47°C/W; adds one NC pin (Pin 10); higher thermal capacity for >3W continuous dissipation. | Preferred for high-temperature environments (>85°C ambient) or sustained 500kHz+ operation where thermal headroom is critical. | Select when thermal margin is prioritized over footprint size, especially in sealed enclosures or high-power density designs. |
Compared with MP1921HQ-A and MP1921HR-A, MP1921HQE-A-LF-Z offers identical electrical performance in a QFN9 package that balances compactness with NC pin flexibility for noise-sensitive routing-ideal for telecom and avionics where layout isolation and thermal balance are jointly critical.
Availability
MP1921HQE-A-LF-Z is available at Aetrix Electronics and suitable for telecom half-bridge PSUs, avionics DC-DC converters, and two-switch forward converters requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle assurance.
Supply support for MP1921HQE-A-LF-Z 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, headquartered in Kirkland, WA, with global design and support operations.
The MP1921 series targets high-frequency, high-voltage half-bridge gate driving in telecom, aerospace, and industrial power conversion-designed for minimal external components, precise timing, and robust operation under wide input and temperature ranges.
FAQ
What is the maximum allowable SW node voltage for MP1921HQE-A-LF-Z?
The absolute maximum SW voltage is +105V for <100ns transients and +100V continuously. This rating enables safe operation in 48V and 100V bus systems with margin for switching spikes and line surges, provided layout minimizes parasitic inductance in the SW loop.
Does MP1921HQE-A-LF-Z require an external bootstrap diode?
No. The device integrates a bootstrap diode with 0.9V forward voltage at 100mA and 2.5Ω dynamic resistance, eliminating the need for an external diode and reducing component count, PCB area, and potential failure points in high-reliability designs.
How is shoot-through prevented in MP1921HQE-A-LF-Z applications?
Shoot-through is prevented by independent INH/INL control with <5ns propagation matching and external dead-time insertion in the PWM controller. The device itself does not generate dead time but ensures matched timing so that externally applied dead time remains effective and predictable.
What is the purpose of the NC pins (5 and 6) in the QFN9 package?
Pins 5 and 6 are internally unconnected and serve as layout isolation barriers-allowing guard traces or ground moats between sensitive analog (BST, DRVH) and digital (INH, INL) sections to suppress coupling and improve noise immunity in high-dV/dt environments.
Can MP1921HQE-A-LF-Z drive 1000pF gate capacitance at 500kHz?
Yes. With 12ns/9ns rise/fall times into 1nF and 2.5A peak current, it fully supports 1000pF loads at 500kHz. Power dissipation remains within 2.5W limit (θJA = 50°C/W) at 25°C ambient, assuming proper thermal pad soldering and airflow.
Is the exposed thermal pad electrically connected internally?
Yes-the exposed pad is internally bonded to VSS and must be soldered to a PCB copper pour connected to system ground. This provides both thermal conduction (reducing θJC to 12°C/W) and low-inductance ground return for high-frequency gate drive currents.
What is the minimum input pulse width supported by INH/INL?
The minimum input pulse width guaranteed to change the output is 50ns. This allows reliable operation with high-resolution PWM controllers and digital isolators delivering narrow gate drive pulses in resonant and adaptive control schemes.
MP1921HQE-A-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 9-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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):
- 120 V
- Rise / Fall Time (Typ):
- 12ns, 9ns
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-QFN (3x3)
MP1921HQE-A-LF-Z FAQ
1.How can I place an order for MP1921HQE-A-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1921HQE-A-LF-Z 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 MP1921HQE-A-LF-Z reliable?
The price and inventory of MP1921HQE-A-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP1921HQE-A-LF-Z is usually 5 days.
3.What payment methods are accepted for MP1921HQE-A-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1921HQE-A-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1921HQE-A-LF-Z?
MP1921HQE-A-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1921HQE-A-LF-Z 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 MP1921HQE-A-LF-Z?
For technical support, including MP1921HQE-A-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1921HQE-A-LF-Z requirements.
6.How does Aetrix verify that MP1921HQE-A-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP1921HQE-A-LF-Z 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 MP1921HQE-A-LF-Z meets industry standards.
7.What is the process for return or replacement of MP1921HQE-A-LF-Z?
All MP1921HQE-A-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP1921HQE-A-LF-Z, 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 MP1921HQE-A-LF-Z part is unused and in its original packaging.
Return procedure for MP1921HQE-A-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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