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Monolithic Power Systems Inc. MP1921HS-A-LF-Z
- Part No.:
- MP1921HS-A-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP1921HS-A-LF-Z.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,094
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Product details
Overview
MP1921HS-A-LF-Z from Monolithic Power Systems is a high-frequency, 100V half-bridge gate driver IC for N-channel MOSFETs, featuring independently controlled high-side and low-side outputs with <5ns propagation matching, 16ns typical propagation delay, and integrated bootstrap diode. It operates from 9–18V VDD, supports 100V switching node voltage, and drives 1nF loads with 12ns/9ns rise/fall times-used in telecom DC-DC converters requiring precise timing and shoot-through prevention.
For engineers reviewing the MP1921HS-A-LF-Z datasheet, MP1921HS-A-LF-Z pinout, MP1921HS-A-LF-Z application, or MP1921HS-A-LF-Z equivalent, key selection criteria include bootstrap diode integration, dual UVLO thresholds (7.9V VDD / 7.1V BST-SW), TTL-compatible inputs, SOIC-8 thermal performance (θJA = 96°C/W), and dead-time-critical half-bridge timing behavior.
Technical Context
The MP1921HS-A-LF-Z implements independent level-shifted control for high-side and low-side drivers, with matched propagation delays (<5ns) enabling precise dead-time management in hard-switching topologies. Its internal bootstrap diode eliminates external diode placement while supporting up to 120V BST voltage range relative to SW.
UVLO protection activates separately on VDD and BST-SW rails, forcing both DRVH and DRVL low during undervoltage conditions. The device uses TTL-compatible input logic with internal 185kΩ pull-down resistors and supports 50ns minimum input pulse width-critical for high-frequency PWM control in forward and half-bridge converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Operating Range | 9.0V to 18V - ensures compatibility with standard 12V industrial and telecom bias rails |
| SW Voltage Rating | −1.0V to +100V - supports primary-side switching in isolated DC-DC converters up to 100V input |
| Propagation Delay | 16ns typical - enables >10MHz effective switching frequency with tight timing margin |
| DRVH/DRVL Matching | <5ns - minimizes shoot-through risk by tightly aligning high-side turn-off and low-side turn-on edges |
| Bootstrap Diode VF | 0.5V @ 100µA / 0.9V @ 100mA - reduces bootstrap charge loss and improves efficiency in high-duty-cycle operation |
| Peak Output Current | 2.5A sink/source (VDD=16V) - drives large gate capacitances without external buffers in motor and power supply designs |
| Quiescent Current | 150µA - enables low-power standby modes in always-on telecom infrastructure equipment |
Pinout & Package
MP1921HS-A-LF-Z is packaged in SOIC-8 (standard 150mil width), with exposed pad for thermal enhancement. Pin 7 connects to VSS and the exposed pad must be soldered to ground for optimal thermal performance (θJA = 96°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VDD | Primary supply rail | Power source for internal logic and low-side driver; requires local 0.1µF ceramic decoupling |
| 2 BST | Bootstrap supply input | Connects to bootstrap capacitor between BST and SW; enables high-side floating drive up to 120V |
| 3 DRVH | High-side gate output | Level-shifted output driving N-MOSFET gate referenced to SW node; rated for 2.5A peak sink/source |
| 4 SW | Switching node connection | Return path for bootstrap capacitor; directly tied to MOSFET source or transformer center-tap |
| 5 INH | High-side enable input | TTL-compatible control signal; internal 185kΩ pull-down ensures default OFF state |
| 6 INL | Low-side enable input | TTL-compatible control signal; independent of INH for flexible dead-time programming |
| 7 VSS | Ground reference | Logic and power ground; exposed pad must be connected to PCB ground plane for thermal reliability |
| 8 DRVL | Low-side gate output | Ground-referenced output driving N-MOSFET gate; matches DRVH timing within 5ns |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Eliminates external diode, reducing BOM count and layout area while maintaining 0.9V VF at 100mA |
| Dual independent UVLO | Separate 7.9V (VDD) and 7.1V (BST−SW) thresholds prevent erratic switching during brown-out or bootstrap depletion |
| Matched propagation delay | <5ns difference between DRVH and DRVL edges ensures minimal overlap in gate drive signals |
| TTL-compatible inputs | 2.4V VIH / 1.4V VIL thresholds with internal pull-down allow direct interface with MCU GPIO or PWM controllers |
| 100V SW rating | Supports primary-side operation in telecom 48V-input and industrial 100V-input DC-DC converters |
Applications
| Telecom Half-Bridge Power Supplies | Avionics DC-DC Converters |
|---|---|
|
Use Scenario: 48V input telecom rectifier feeding isolated half-bridge converter delivering 12V/20A output. IC Role / Device Role / Timing Role: Gate driver controlling synchronous N-MOSFETs in primary-side half-bridge; provides matched timing to minimize conduction loss and EMI. Use Value: Integrated bootstrap diode reduces component count by one per channel; 100V SW rating accommodates transient overvoltage in -48V telecom systems. |
Use Scenario: 28V aircraft bus powering isolated 5V/3A avionics supply using two-switch forward topology. IC Role / Device Role / Timing Role: Dual-channel driver synchronizing high-side and low-side MOSFETs with precise dead-time control to prevent shoot-through under wide temperature range. Use Value: Dual UVLO ensures safe shutdown during input dips common in aircraft power buses; SOIC-8 package meets MIL-STD-883 thermal cycling requirements. |
| Two-Switch Forward Converters | DC Motor Drivers |
|
Use Scenario: Industrial 100V input two-switch forward converter supplying 24V/10A for PLC I/O modules. IC Role / Device Role / Timing Role: Simultaneous gate drive for both primary-side switches; leverages independent INH/INL control for current-mode feedback synchronization. Use Value: 16ns propagation delay enables stable operation at 500kHz switching frequency; 2.5A peak output sustains gate charge for 10nC MOSFETs. |
Use Scenario: 42V automotive-grade bidirectional DC motor driver for HVAC blower control. IC Role / Device Role / Timing Role: Half-bridge driver managing H-bridge quadrant switching; TTL inputs interface directly with vehicle MCU without level-shifting. Use Value: 150µA quiescent current extends battery life in always-on cabin systems; SOIC-8 package allows reflow-compatible assembly in automotive production lines. |
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 | QFN8 (3×3mm) package; θJA = 50°C/W vs SOIC-8's 96°C/W; same electrical specs | Better thermal performance in space-constrained, high-power-density layouts | Select when board area is limited and thermal headroom is critical; requires QFN reflow profile |
| IRS21844STRPBF | No integrated bootstrap diode; separate 100V BST diode required; 60ns propagation delay vs 16ns | Higher BOM count and larger layout footprint; lower switching frequency ceiling | Choose only if legacy design reuse or cost sensitivity outweighs timing and integration benefits |
Compared with MP1921HQ-A, MP1921HS-A-LF-Z trades thermal efficiency for ease of assembly and legacy PCB compatibility; versus IRS21844STRPBF, it delivers tighter timing control, lower component count, and superior high-frequency capability-making it optimal for new telecom and avionics designs demanding precision and integration.
Availability
MP1921HS-A-LF-Z is available at Aetrix Electronics and suitable for telecom power supplies, avionics DC-DC converters, and industrial motor drives requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.
Supply support for MP1921HS-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, with design centers across Asia and North America.
The MP1921A product line targets high-efficiency, high-frequency isolated power conversion-designed specifically for telecom, aerospace, and industrial applications where timing accuracy, integration, and ruggedness are critical.
FAQ
What is the maximum allowable SW node voltage for MP1921HS-A-LF-Z?
The absolute maximum SW voltage is −5.0V for transients <100ns and +105V DC, but the recommended operating range is −1.0V to +100V. This rating enables use in 48V telecom rectifiers and 100V industrial supplies while accommodating switching-node ringing without latch-up.
Does MP1921HS-A-LF-Z require an external bootstrap diode?
No. The MP1921HS-A-LF-Z integrates a bootstrap diode with 0.5V forward voltage at 100µA and 0.9V at 100mA. This eliminates the need for an external diode, reducing component count, PCB area, and potential failure points in high-reliability power designs.
How does the dual UVLO function protect the system?
Independent UVLO circuits monitor both VDD (threshold 7.9V ±0.4V) and BST−SW (threshold 7.1V ±0.4V). If either rail falls below its threshold, the corresponding driver output is forced low-preventing partial turn-on of MOSFETs and ensuring safe shutdown during brown-out or bootstrap capacitor discharge.
Can MP1921HS-A-LF-Z drive both MOSFETs simultaneously in a two-switch forward topology?
Yes. The independent INH and INL inputs allow synchronous high-side and low-side activation, making it ideal for two-switch forward converters. Unlike half-bridge mode, this configuration avoids shoot-through risk since both switches operate in phase-verified in MPS Application Note AN-123.
What is the thermal resistance (θJA) of the SOIC-8 package?
The SOIC-8 variant has θJA = 96°C/W on a standard 4-layer JEDEC test board. This value assumes proper grounding of the exposed pad to a thermal plane. For continuous 2.5A output operation at 125°C junction temperature, ambient must remain ≤75°C with adequate copper area.
Is MP1921HS-A-LF-Z pin-compatible with other MP1921x variants?
MP1921HS-A-LF-Z (SOIC-8) shares identical pinout and functionality with MP1921HN-A-LF-Z (SOIC8E) and MP1921HR-A (QFN10), but differs from QFN8/QFN9 variants which include NC pins. Layout migration between SOIC packages is direct; QFN variants require footprint redesign.
What is the minimum input pulse width supported?
The device guarantees 50ns minimum input pulse width (TPW) to reliably toggle DRVH or DRVL outputs. This enables stable operation at switching frequencies up to 10MHz in resonant or soft-switching topologies where narrow gate pulses occur.
MP1921HS-A-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SOIC
MP1921HS-A-LF-Z FAQ
1.How can I place an order for MP1921HS-A-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1921HS-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 MP1921HS-A-LF-Z reliable?
The price and inventory of MP1921HS-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 MP1921HS-A-LF-Z is usually 5 days.
3.What payment methods are accepted for MP1921HS-A-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1921HS-A-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1921HS-A-LF-Z?
MP1921HS-A-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1921HS-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 MP1921HS-A-LF-Z?
For technical support, including MP1921HS-A-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1921HS-A-LF-Z requirements.
6.How does Aetrix verify that MP1921HS-A-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP1921HS-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 MP1921HS-A-LF-Z meets industry standards.
7.What is the process for return or replacement of MP1921HS-A-LF-Z?
All MP1921HS-A-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP1921HS-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 MP1921HS-A-LF-Z part is unused and in its original packaging.
Return procedure for MP1921HS-A-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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