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Texas Instruments LM2936QMX-3.3/NOPB
- Part No.:
- LM2936QMX-3.3/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2936QMX-3.3/NOPB.pdf
- Description:
- IC REG LINEAR 3.3V 50MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,025
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Product details
Overview
LM2936QMX-3.3/NOPB from Texas Instruments is an AEC-Q100 Grade 1 qualified ultralow-quiescent-current LDO voltage regulator delivering a fixed 3.3 V output at up to 50 mA, with ≤15 μA quiescent current at 100 μA load, ±2% initial output tolerance, and 200 mV typical dropout at full load. It serves as the primary power supply for always-on automotive modules such as body control units and remote keyless entry receivers.
For engineers reviewing the LM2936QMX-3.3/NOPB datasheet, LM2936QMX-3.3/NOPB pinout, LM2936QMX-3.3/NOPB application, or LM2936QMX-3.3/NOPB equivalent, key selection considerations include its −40°C to +125°C operating range, reverse-battery protection, −50-V transient immunity, 40-V max input rating, and strict 0.3–8 Ω ESR requirement for 22 µF COUT stability.
Technical Context
The LM2936QMX-3.3/NOPB uses a PNP pass transistor architecture enabling low dropout and inherent reverse-polarity protection without external components. Its internal bandgap reference and error amplifier maintain regulation across 5.5 V–40 V input while sustaining <15 μA IQ in standby - critical for battery-retention applications.
Thermal shutdown activates at ~160°C junction temperature, and short-circuit current limiting caps output at 65–250 mA depending on conditions. Unlike CMOS-based LDOs, it does not require UVLO or soft-start circuitry and enters linear regulation when VIN exceeds VOUT + 1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.300 V ±2% initial tolerance; ±3% over line/load/temperature ensures stable MCU core supply under cold-crank and load-dump conditions. |
| Quiescent Current | ≤15 μA at 100 μA load - enables >10-year battery life in vehicle intrusion sensors and telematics keep-alive circuits. |
| Input Voltage Range | 5.5 V to 40 V continuous operation - supports 12 V automotive systems including boosted start-stop and load-dump transients. |
| Dropout Voltage | 200 mV typical at 50 mA - allows regulation down to 3.5 V input, preserving functionality during cranking (6–8 V). |
| Reverse Battery Protection | Withstands −50 V input transients for 1 ms - eliminates need for external series diode in reverse-polarity fault scenarios. |
| Output Capacitor ESR | 0.3 Ω to 8 Ω required for 22 µF COUT - mandates careful capacitor selection (e.g., tantalum or aluminum polymer) to avoid oscillation. |
| Thermal Shutdown | Activates at ~160°C junction temperature and auto-recovers after ~10°C cooldown - protects against sustained overload without latch-up. |
Pinout & Package
LM2936QMX-3.3/NOPB is packaged in a 3-pin TO-252 (NDP) surface-mount package with exposed thermal pad (6.10 mm × 6.58 mm), optimized for high-power dissipation in compact automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Unregulated input | Accepts 5.5–40 V DC; must be decoupled with ≥100 nF ceramic if >3 inches from bulk filter - critical for noise rejection in CAN/LIN node supplies. |
| GND | Ground reference | Common return for input/output paths and thermal pad connection; requires low-impedance plane tie to minimize PSRR degradation. |
| OUT | Regulated output | Delivers 3.3 V to load; requires ≥22 µF output capacitor with 0.3–8 Ω ESR placed adjacent to pin - failure causes instability or oscillation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation - meets automotive electronics reliability requirements without derating. |
| Ultralow quiescent current | ≤15 μA at 100 μA load enables >10-year shelf life in battery-backed modules like tire pressure monitors. |
| Integrated reverse-battery protection | No external diode needed - reduces BOM count and forward-drop losses in 12 V systems with polarity-reversal risk. |
| −50 V transient immunity | Sustains 1 ms pulses per ISO 7637-2 Pulse 1/2b - eliminates need for TVS clamping in basic load-dump protection schemes. |
| Thermal and short-circuit protection | Auto-recovering shutdown prevents permanent damage during wiring faults or solder shorts in production environments. |
Applications
| Body Control Module (BCM) | Remote Keyless Entry (RKE) Receiver |
|---|---|
Use Scenario: Powering microcontroller, CAN transceiver, and wake-up logic in always-on vehicle body domain controller. IC Role / Device Role / Timing Role: Primary 3.3 V LDO supplying MCU I/O and communication peripherals during sleep and active modes. Use Value: ≤15 μA quiescent current extends battery backup duration beyond 10 years; 40 V input rating survives alternator load-dump events. |
Use Scenario: Supplying RF front-end and ASK/OOK demodulator IC in passive entry fob receiver module. IC Role / Device Role / Timing Role: Stable 3.3 V rail for low-noise analog signal chain and digital baseband processing. Use Value: ±3% output tolerance over temperature ensures consistent RSSI measurement accuracy; reverse-battery protection avoids field failures from improper jump-starting. |
| Tire Pressure Monitoring System (TPMS) | Automotive Camera Power Sequencing |
Use Scenario: Powering pressure sensor, RF transmitter, and ultra-low-power MCU in wheel-mounted TPMS sensor. IC Role / Device Role / Timing Role: Standby-mode regulator maintaining real-time clock and wake-up circuitry between transmissions. Use Value: 15 μA IQ enables multi-year operation on coin-cell battery; −40°C to +125°C rating covers full vehicle environmental envelope. |
Use Scenario: Providing clean 3.3 V bias to image sensor and ISP in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Post-regulation supply after main 5 V buck converter, filtering switching noise before analog imaging path. Use Value: 500 μV RMS output noise and −60 dB ripple rejection suppress switching artifacts in pixel data; 22 µF/0.3–8 Ω COUT ensures stable startup during cold boot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73333PDBVR | CMOS-based, 350 mA output, 40 μA IQ, no reverse-battery protection, 5.5 V max input. | Higher current capability but unsuitable for reverse-polarity or >12 V automotive inputs. | Select only for non-automotive, low-voltage, higher-current applications where reverse protection is externally managed. |
| TPS7B6733QPWPRQ1 | AEC-Q100 Grade 1, 250 mA, 28 μA IQ, integrated enable/shutdown, 40 V max input, no reverse-battery protection. | Includes enable pin and higher output current, but lacks built-in reverse-polarity protection requiring external diode. | Prefer when system-level shutdown control is required and reverse-battery protection can be added externally. |
Compared with TLV73333PDBVR and TPS7B6733QPWPRQ1, the LM2936QMX-3.3/NOPB uniquely integrates reverse-battery protection and achieves lower quiescent current (≤15 μA), making it the only drop-in solution for legacy automotive modules requiring zero-additional-protection 12 V battery interfaces.
Availability
LM2936QMX-3.3/NOPB is available at Aetrix Electronics and suitable for automotive body electronics, telematics power management, and battery-backed sensor modules requiring stable component supply across extended product lifecycles.
Supply support for LM2936QMX-3.3/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 company headquartered in Dallas, Texas, designing and manufacturing analog and embedded processing chips for industrial, automotive, and consumer markets.
The LM2936Q series was developed specifically for automotive power management in battery-sensitive, high-reliability applications - emphasizing ultralow IQ, wide-input operation, and integrated fault protection without external components.
FAQ
What is the maximum input voltage rating for LM2936QMX-3.3/NOPB?
The LM2936QMX-3.3/NOPB has a maximum continuous operating input voltage of 40 V and survives −50 V reverse transients for 1 ms. It is not rated for 60 V operation - that specification applies only to the LM2936QHBM variant. Exceeding 40 V risks catastrophic failure due to safe-operating-area limitations in the internal PNP pass device.
Does LM2936QMX-3.3/NOPB include a shutdown pin?
No, the LM2936QMX-3.3/NOPB does not include a shutdown (SD) pin. That feature is exclusive to the LM2936QHBMA variant (5 V version with shutdown). The LM2936QMX-3.3/NOPB operates continuously when powered within its input range and has no enable/disable control function.
What output capacitor is required for stable operation of LM2936QMX-3.3/NOPB?
LM2936QMX-3.3/NOPB requires a minimum 22 µF output capacitor with an ESR between 0.3 Ω and 8 Ω, rated for the full −40°C to +125°C operating temperature range. Ceramic capacitors may be used only with a series resistor (typically 500 mΩ–1 Ω) to emulate required ESR - direct use without ESR simulation causes instability.
Is LM2936QMX-3.3/NOPB qualified for automotive applications?
Yes, LM2936QMX-3.3/NOPB is AEC-Q100 qualified for Grade 1 (−40°C to +125°C ambient), with full test documentation covering thermal cycling, humidity testing, and vibration. It is explicitly designed for automotive body electronics, infotainment, and ADAS subsystems where long-term reliability under harsh environmental stress is mandatory.
What is the dropout voltage of LM2936QMX-3.3/NOPB at 50 mA load?
The dropout voltage of LM2936QMX-3.3/NOPB is typically 200 mV at 50 mA load and 25°C, with a maximum of 400 mV across temperature and process variation. This allows the device to maintain regulation down to VIN = 3.5 V - sufficient for operation during engine cranking when battery voltage dips to 6–8 V.
LM2936QMX-3.3/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
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.4V @ 50mA
- Current - Output:
- 50mA
- Current - Quiescent (Iq):
- 15 µA
- Current - Supply (Max):
- 2.5 mA
- PSRR:
- 60dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM2936QMX-3.3/NOPB FAQ
1.How can I place an order for LM2936QMX-3.3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2936QMX-3.3/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 LM2936QMX-3.3/NOPB reliable?
The price and inventory of LM2936QMX-3.3/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2936QMX-3.3/NOPB is usually 5 days.
3.What payment methods are accepted for LM2936QMX-3.3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2936QMX-3.3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2936QMX-3.3/NOPB?
LM2936QMX-3.3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2936QMX-3.3/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 LM2936QMX-3.3/NOPB?
For technical support, including LM2936QMX-3.3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2936QMX-3.3/NOPB requirements.
6.How does Aetrix verify that LM2936QMX-3.3/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2936QMX-3.3/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 LM2936QMX-3.3/NOPB meets industry standards.
7.What is the process for return or replacement of LM2936QMX-3.3/NOPB?
All LM2936QMX-3.3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2936QMX-3.3/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 LM2936QMX-3.3/NOPB part is unused and in its original packaging.
Return procedure for LM2936QMX-3.3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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