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Texas Instruments LM9061MX/NOPB
- Part No.:
- LM9061MX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM9061MX/NOPB.pdf
- Description:
- IC GATE DRVR HIGH-SIDE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,100
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Product details
Overview
LM9061MX/NOPB from Texas Instruments is a high-side protection controller IC that drives external N-channel MOSFETs in automotive power distribution systems. It provides lossless overcurrent protection by monitoring VDS, supports 7–26 V supply, withstands 60-V transients, and features programmable latch-off delay and gradual turnoff for inductive loads - used in transmission control units and solenoid drivers.
For engineers reviewing the LM9061MX/NOPB datasheet, LM9061MX/NOPB pinout, LM9061MX/NOPB application, or LM9061MX/NOPB equivalent, key selection criteria include its 8-pin SOIC package, gate drive clamping at 15 V, 110-µA normal OFF sink current, 10-µA latch-OFF sink current, and AEC-Q100 qualification for automotive environments.
Technical Context
The LM9061MX/NOPB integrates a charge-pump gate driver generating VOUT = VCC + 7 to VCC + 15 V for high-side N-MOSFET biasing, with internal 15-V Zener clamp limiting VGS. Its protection circuitry continuously compares VDS against an externally set threshold using a precision 1.25-V reference and 80-µA IREF current sink.
Protection activation triggers a two-stage shutdown: first a 110-µA gate discharge for normal OFF, then a reduced 10-µA sink during latch-OFF after programmable delay (8–18 ms with 22 nF capacitor), enabling controlled turnoff of inductive loads while avoiding destructive flyback voltage spikes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 7 V to 26 V - supports 12-V and 24-V automotive battery systems with transient tolerance up to 60 V. |
| Gate Drive Output | VCC + 7 V to VCC + 15 V - enables full enhancement of high-RDS(on) N-MOSFETs without external boost supply. |
| Overvoltage Shutdown | VCC > 30 V - disables operation to protect internal circuitry during load-dump events. |
| Protection Threshold Reference | 1.25 V ±0.1 V - stable bandgap reference sets precise VDS trip point independent of temperature. |
| Normal Turnoff Sink Current | 75–145 µA - ensures linear, controlled MOSFET gate discharge for <10-ms turnoff with typical gate capacitance. |
| Latch-OFF Sink Current | 5–15 µA - extends turnoff time to 45–140 ms, minimizing dV/dt stress on inductive loads during fault conditions. |
| Delay Timer Interval | 8–18 ms (with 22 nF capacitor) - allows adjustable response window before latching off during overcurrent. |
Pinout & Package
LM9061MX/NOPB is housed in an 8-pin SOIC (D) package measuring 4.9 mm × 3.91 mm, optimized for automotive PCB layouts with thermal pad compatibility and JEDEC-standard footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Sense (Pin 1) | Inverting input of protection comparator | Connected to MOSFET source; monitors VS to detect VDS rise during overload. |
| Threshold (Pin 2) | Noninverting input of protection comparator | Biased via RTHRESHOLD to set VDS(MAX); determines trip point for lossless overcurrent detection. |
| Ground (Pin 3) | Power and signal reference | Common return for internal logic, charge pump, and protection circuitry; must be low-impedance. |
| Output (Pin 4) | High-side gate driver output | Drives MOSFET gate with charge-pump boosted voltage; clamped at 15 V max VGS. |
| VCC (Pin 5) | Main supply input | Accepts 7–26 V; powers internal logic and charge pump; requires ≥0.1 µF bypass capacitor. |
| IREF (Pin 6) | Reference current sink | Sets threshold current (≈80 µA) via external resistor; also stabilizes charge pump frequency. |
| On/Off (Pin 7) | CMOS-compatible enable control | Logic-high (>3.5 V) enables gate drive; logic-low (<1.5 V) initiates 110-µA gate discharge. |
| Delay (Pin 8) | Programmable fault timer node | Capacitor-to-ground sets delay interval (8–18 ms) before latch-OFF activation upon overcurrent detection. |
Key Features
| Feature | Design Value |
|---|---|
| Lossless overcurrent protection | Eliminates need for series current-sense resistor - preserves full supply voltage at load and avoids power loss in sensing element. |
| Gradual turnoff with dual-sink architecture | 110-µA normal OFF + 10-µA latch-OFF sink currents reduce dI/dt-induced voltage spikes across inductive loads like solenoids and motors. |
| 60-V supply transient tolerance | Withstands ISO 7637-2 Pulse 5a load-dump surges without external TVS, simplifying front-end protection design. |
| AEC-Q100 qualified (Grade 1) | Rated for −40°C to +125°C ambient operation with HBM ±2 kV / CDM ±1 kV ESD robustness - validated for engine bay deployment. |
| Programmable protection delay | External capacitor on Delay pin sets 8–18 ms window before latching off, allowing brief inrush currents (e.g., lamp cold filament) to pass unblocked. |
Applications
| Transmission Control Units (TCU) | Engine Control Units (ECU) |
|---|---|
Use Scenario: Controlling hydraulic solenoids and shift actuators in automatic transmissions under harsh under-hood conditions. IC Role / Device Role / Timing Role: High-side switch controller providing fault-protected 12-V power delivery to solenoid coils with programmable overcurrent response. Use Value: Prevents MOSFET failure during coil short-circuits while maintaining AEC-Q100 compliance and eliminating sense-resistor power loss. | Use Scenario: Driving fuel injectors, idle air control valves, and turbocharger actuators in gasoline and diesel ECUs. IC Role / Device Role / Timing Role: Gate driver and protection supervisor for high-current N-MOSFETs switching inductive loads with fast transient immunity. Use Value: Withstands 60-V load-dump transients and uses gradual turnoff to suppress flyback voltage, reducing need for snubbers and improving system reliability. |
| Valve & Relay Drivers | Lamp Drivers |
Use Scenario: Powering industrial pneumatic valves and automotive relays requiring robust short-circuit protection and thermal resilience. IC Role / Device Role / Timing Role: High-side protection controller interfacing microcontroller GPIOs to external power MOSFETs driving resistive/inductive loads. Use Value: Enables CMOS-level ON/OFF control while delivering lossless overcurrent detection and latch-OFF behavior compliant with ISO 16750-2. | Use Scenario: Switching halogen and LED headlamps where inrush current exceeds steady-state rating and thermal management is critical. IC Role / Device Role / Timing Role: Programmable-delay high-side driver ensuring lamps energize fully before protection engages, avoiding false trips during cold filament surge. Use Value: Adjustable delay (via Delay pin capacitor) accommodates 5–10× cold-filament inrush without latching off, extending lamp life and system uptime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side protection controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS4H160-Q1 | Integrated 40-mΩ high-side switch with built-in current sense amplifier; no external MOSFET required; higher quiescent current (25 µA vs. 5 mA). | Targeted at lower-current (<2.5 A) applications with space-constrained layouts; lacks programmable delay and lossless VDS sensing. | Select when board area is limited and integrated RDS(on) suffices; avoid if external MOSFET flexibility or precise VDS-based trip is needed. |
| LM5069MMX-2/NOPB | Hot-swap controller with current-limit foldback and adjustable UVLO; operates down to 2.5 V; no charge-pump gate drive or VDS monitoring. | Designed for 3.3/5/12-V backplane and module insertion; not rated for automotive transients or inductive load turnoff control. | Choose for non-automotive hot-swap applications requiring precise current limiting; not suitable as direct functional replacement for LM9061MX/NOPB. |
Compared with TPS4H160-Q1 and LM5069MMX-2/NOPB, the LM9061MX/NOPB uniquely combines external MOSFET scalability, lossless VDS-based overcurrent detection, programmable delay, and AEC-Q100-compliant 60-V transient tolerance - making it optimal for high-power, high-reliability automotive high-side switching where design flexibility and ruggedness are mandatory.
Availability
LM9061MX/NOPB is available at Aetrix Electronics and suitable for transmission control units, engine control units, and solenoid driver modules requiring stable component supply across extended automotive production lifecycles.
Supply support for LM9061MX/NOPB 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive-grade ICs, with decades of experience in high-reliability power management solutions.
The LM9061MX/NOPB belongs to TI's automotive high-side protection controller product line, engineered specifically for fault-tolerant power distribution in engine, transmission, and chassis control systems operating under ISO 16750 and AEC-Q100 requirements.
FAQ
What is the maximum supply voltage the LM9061MX/NOPB can withstand during automotive load-dump events?
The LM9061MX/NOPB is rated to withstand 60-V supply transients, meeting ISO 7637-2 Pulse 5a requirements for 12-V automotive systems. This eliminates the need for external TVS diodes in many front-end protection designs. The device shuts down if VCC exceeds 30 V during normal operation, but survives brief 60-V surges without damage. LM9061MX/NOPB's robust input stage and internal clamping ensure reliable operation in real-world under-hood environments.
How does the LM9061MX/NOPB achieve lossless overcurrent protection without a sense resistor?
The LM9061MX/NOPB monitors the drain-to-source voltage (VDS) of the external N-MOSFET to infer overcurrent, rather than measuring current directly through a series resistor. By comparing VDS against a user-programmed threshold set via RTHRESHOLD and IREF, it detects excessive conduction losses without dissipating power in a sense element. This preserves full supply voltage at the load and avoids thermal derating issues associated with shunt resistors. LM9061MX/NOPB implements this using a precision comparator with 1.25-V reference and low-input-bias architecture.
Can the LM9061MX/NOPB drive multiple parallel MOSFETs, and what limits its gate drive capability?
Yes, the LM9061MX/NOPB is explicitly designed to drive single or multiple parallel N-channel MOSFETs for very high-current applications. Its charge-pump gate driver delivers VCC + 7 V to VCC + 15 V with typical 30-mA peak sourcing capability during turn-on. Gate drive strength is limited by VCC bypassing (≥0.1 µF recommended) and external MOSFET total gate charge (Qg). LM9061MX/NOPB's 110-µA normal OFF sink and 10-µA latch-OFF sink ensure controlled discharge regardless of parallel count, provided layout minimizes gate loop inductance.
What is the purpose of the Delay pin (Pin 8) on the LM9061MX/NOPB, and how is it configured?
The Delay pin (Pin 8) on the LM9061MX/NOPB sets the time interval between overcurrent detection and latch-OFF activation using an external capacitor to ground. With a 22-nF capacitor, the delay ranges from 8 to 18 ms depending on temperature and process variation. This prevents nuisance tripping during benign inrush events (e.g., cold lamp filaments or motor startup). The internal 2–10 mA discharge current charges the capacitor to a 5–6.2 V threshold, triggering the protection latch. LM9061MX/NOPB's datasheet provides exact timing equations and layout guidance for stable delay calibration.
Is the LM9061MX/NOPB pin-compatible with the LM9061-Q1 variant, and what are the key differences?
Yes, the LM9061MX/NOPB and LM9061-Q1 share identical pinout, electrical specifications, and SOIC-8 packaging. The primary difference is qualification: LM9061-Q1 is AEC-Q100 Grade 1 qualified (−40°C to +125°C junction) with additional screening for automotive use, while LM9061MX/NOPB is the commercial-grade version (−40°C to +125°C ambient) intended for industrial and non-safety-critical automotive applications. Both devices have identical functionality, timing, and protection features. LM9061MX/NOPB offers cost-effective performance where full AEC-Q100 certification is not mandated.
LM9061MX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- High-Side
- Channel Type:
- Single
- Number of Drivers:
- 1
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 7V ~ 26V
- Logic Voltage - VIL, VIH:
- 1.5V, 3.5V
- Current - Peak Output (Source, Sink):
- -
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM9061MX/NOPB FAQ
1.How can I place an order for LM9061MX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM9061MX/NOPB 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 LM9061MX/NOPB reliable?
The price and inventory of LM9061MX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM9061MX/NOPB is usually 5 days.
3.What payment methods are accepted for LM9061MX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM9061MX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM9061MX/NOPB?
LM9061MX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM9061MX/NOPB 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 LM9061MX/NOPB?
For technical support, including LM9061MX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM9061MX/NOPB requirements.
6.How does Aetrix verify that LM9061MX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM9061MX/NOPB 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 LM9061MX/NOPB meets industry standards.
7.What is the process for return or replacement of LM9061MX/NOPB?
All LM9061MX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM9061MX/NOPB, 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 LM9061MX/NOPB part is unused and in its original packaging.
Return procedure for LM9061MX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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