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Texas Instruments LM2734ZQSDE/NOPB
- Part No.:
- LM2734ZQSDE/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LM2734ZQSDE/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:228
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Product details
Overview
LM2734ZQSDE/NOPB from Texas Instruments (formerly National Semiconductor) is a monolithic 3 MHz PWM step-down DC-DC regulator in a 6-pin LLP (3 mm × 3 mm) package, featuring an internal 300 mΩ NMOS switch, 1 A output current capability, 0.8 V internal reference (±2%), and AEC-Q100 Grade 1 qualification for automotive point-of-load applications.
For engineers reviewing the LM2734ZQSDE/NOPB datasheet, LM2734ZQSDE/NOPB pinout, LM2734ZQSDE/NOPB application, or LM2734ZQSDE/NOPB equivalent, key selection criteria include its 3.0–20 V input range, 0.8–18 V adjustable output, 30 nA shutdown current, thermal shutdown, and current-mode control with internal compensation - all critical for compact, high-efficiency automotive and battery-powered designs.
Technical Context
The LM2734ZQSDE/NOPB implements fixed-frequency current-mode PWM control with an internally set 3 MHz switching frequency, enabling use of sub-3 mm surface-mount inductors and ceramic capacitors. Its on-time minimum of 13 ns supports stable regulation down to 0.8 V output across the full 3–20 V input range.
It integrates soft-start (200 µs ramp), pulse-by-pulse current limit (1.7 A typ), output overvoltage protection (10% above VFB), undervoltage lockout (2.74 V rising threshold, 440 mV hysteresis), and thermal shutdown (165 °C trip, 150 °C recovery), all operating within −40 °C to +125 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 3 MHz (fixed); enables ultra-compact filter design with ≤2.2 µH inductors and low-ESR ceramic capacitors |
| Input Voltage Range | 3.0 V to 20 V; supports wide-input automotive and industrial rails without external pre-regulation |
| Output Voltage Range | 0.8 V to 18 V (adjustable via resistor divider); 0.8 V ±2% internal reference ensures tight regulation at low-VOUT |
| Max Output Current | 1 A continuous; delivered via integrated 300 mΩ NMOS switch (TSOT) / 340 mΩ (LLP), minimizing external component count |
| Shutdown Current | 30 nA typical; enables long battery life in always-on automotive modules and USB-powered devices |
| Junction Temp Range | −40 °C to +125 °C; qualified per AEC-Q100 Grade 1, supporting under-hood and infotainment applications |
| Protection Features | Thermal shutdown, output overvoltage (10% OV), pulse-by-pulse current limit, UVLO with hysteresis - no external fault management required |
Pinout & Package
LM2734ZQSDE/NOPB uses the 6-lead LLP package (3 mm × 3 mm, NS Package Number SDE06A), with exposed die attach pad (DAP) internally connected to GND for enhanced thermal performance. The package is RoHS-compliant and lead-free (NOPB suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - BOOST | Bootstrap supply node | Drives NMOS gate; requires 0.01 µF ceramic capacitor between BOOST and SW to sustain ≥2.5 V gate drive during high-duty-cycle operation |
| 2 - GND | Signal and power ground | Reference for feedback network and thermal path; DAP connects internally to this pin for PCB heat sinking |
| 3 - FB | Feedback input | High-impedance (250 nA max bias) node sensing resistor-divider output; trace must be short and noise-isolated for stable regulation |
| 4 - EN | Enable control | Logic-high active enable; 0.4 V falling threshold and 1.8 V rising threshold; 10 nA leakage allows direct MCU GPIO control without pull-up |
| 5 - VIN | Main input supply | Accepts 3–20 V; requires local 10 µF low-ESL ceramic bypass capacitor placed adjacent to pin |
| 6 - SW | Power switch node | Connects to inductor, catch diode cathode, and BOOST capacitor; high dv/dt node requiring minimized loop area for EMI control |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive applications including infotainment, ADAS sensors, and body control modules with −40 °C to +125 °C operation |
| Internal compensation | Eliminates external compensation network; reduces BOM count and layout sensitivity while maintaining stability across 0.8–18 V VOUT |
| 30 nA shutdown current | Enables <1 µA system standby power when paired with low-IQ microcontrollers in key-off automotive states |
| 13 ns minimum on-time | Supports high step-down ratios (e.g., 12 V → 0.8 V at 3 MHz) without pulse-skipping or audible noise |
| Integrated soft-start | 200 µs controlled VOUT ramp prevents inrush current into downstream capacitance, eliminating need for external timing components |
Applications
| Automotive Infotainment Power | USB-C PD Sink Regulation |
|---|---|
Use Scenario: Local 3.3 V or 5 V rail generation for display controllers, audio codecs, and CAN transceivers in head units and digital clusters. IC Role / Device Role / Timing Role: Primary buck regulator delivering 1 A at 3.3 V from 12 V battery rail with AEC-Q100 compliance and thermal robustness. Use Value: Eliminates need for external current-sense resistors or compensation components; 3 MHz switching avoids AM-band interference while enabling <10 mm² total solution size. | Use Scenario: Step-down conversion from variable USB-C PD input (5–20 V) to fixed 3.3 V or 5 V for embedded microcontrollers and sensors. IC Role / Device Role / Timing Role: Input-flexible, high-efficiency buck converter handling dynamic PD voltage negotiation and load transients up to 1 A. Use Value: 30 nA shutdown and 3 MHz operation allow fast response to USB-C contract changes while maintaining low quiescent power during idle negotiation phases. |
| DSL Modem Point-of-Load | Industrial Sensor Node Supply |
Use Scenario: Generating clean 1.8 V or 2.5 V supplies for ADSL/VDSL line drivers and PHY ICs in broadband access equipment. IC Role / Device Role / Timing Role: High-frequency buck regulator providing low-noise, tightly regulated local power with minimal board area impact. Use Value: Internal soft-start and current-mode control suppress startup overshoot and maintain regulation during burst-mode line driver activity. | Use Scenario: Compact 3.3 V supply for battery-operated wireless sensor nodes (e.g., LoRaWAN, NB-IoT) requiring multi-year operation on coin cells. IC Role / Device Role / Timing Role: Ultra-low-IQ buck converter enabling >10-year battery life at 10 µA average load, with fast wake-up from shutdown. Use Value: 30 nA shutdown current and 1.5 mA operating IQ directly extend usable battery capacity beyond what linear regulators can achieve. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130ARGTR | 3 MHz sync buck, 3–17 V input, 1.2 A, 12 µA IQ, no AEC-Q100 grade | Higher light-load efficiency but lacks automotive qualification and 30 nA shutdown | Preferred for industrial IoT where AEC-Q100 is not required and longer battery life at µA loads is critical |
| MP2315GJ-Z | 2.2–15 V input, 1.5 A, 500 kHz–1.5 MHz adjustable freq, 25 µA IQ, no AEC-Q100 | Lower switching frequency increases inductor size; no automotive qualification or 30 nA shutdown | Suitable for cost-sensitive consumer applications where footprint and qualification are secondary to BOM cost |
Compared with TPS62130ARGTR and MP2315GJ-Z, LM2734ZQSDE/NOPB uniquely combines AEC-Q100 Grade 1 qualification, 30 nA shutdown, and 3 MHz fixed-frequency operation in a 3 mm × 3 mm LLP package - making it the only option among the three qualified for automotive under-hood and infotainment systems requiring guaranteed reliability and minimal standby power.
Availability
LM2734ZQSDE/NOPB is available at Aetrix Electronics and suitable for automotive infotainment systems, USB-powered portable instrumentation, and industrial sensor nodes requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LM2734ZQSDE/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 acquired National Semiconductor in 2011 and maintains its legacy analog power portfolio with full technical documentation, WEBENCH® design tools, and automotive-grade manufacturing rigor.
The LM2734Z series was designed specifically for space-constrained, high-frequency point-of-load regulation in automotive, DSL, and portable electronics - prioritizing integration, thermal performance, and qualification compliance over programmability.
FAQ
What is the package type and thermal pad configuration of LM2734ZQSDE/NOPB?
The LM2734ZQSDE/NOPB uses a 6-lead LLP package measuring 3 mm × 3 mm with an exposed die attach pad (DAP) internally connected to GND. This DAP must be soldered to a thermal pad on the PCB with ≥4 thermal vias to a solid ground plane to achieve the specified θJA of 118 °C/W and ensure reliable operation at 1 A continuous load.
Does LM2734ZQSDE/NOPB require external compensation components?
No, LM2734ZQSDE/NOPB features fully internal compensation, eliminating the need for external RC networks. This simplifies design, reduces bill-of-materials count, and improves layout robustness - especially critical in high-density automotive PCBs where routing space is constrained and noise immunity is essential.
What is the minimum output voltage supported by LM2734ZQSDE/NOPB and how is it set?
LM2734ZQSDE/NOPB supports a minimum output voltage of 0.8 V, set by its internal 0.8 V ±2% reference connected to the FB pin. Output voltage is adjusted using a resistor divider (R1 from VOUT to FB, R2 from FB to GND), with R2 = 10 kΩ recommended for optimal accuracy and noise immunity.
How does the BOOST pin function in LM2734ZQSDE/NOPB and what capacitor value is required?
The BOOST pin supplies gate drive voltage to the internal NMOS switch via a bootstrap capacitor connected between BOOST and SW. A 0.01 µF X7R/X5R ceramic capacitor rated ≥6.3 V is required; it must be placed adjacent to the IC with minimal trace length to sustain ≥2.5 V gate drive margin and prevent switch dropout at high duty cycles.
Is LM2734ZQSDE/NOPB compatible with WEBENCH® design tools?
Yes, LM2734ZQSDE/NOPB is fully supported in Texas Instruments' WEBENCH® Power Designer. Engineers can generate complete schematic and BOM, simulate efficiency and thermal performance, select optimized inductors/capacitors, and export layout-ready designs - all validated against the official LM2734Z electrical characteristics and application notes.
LM2734ZQSDE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 18V
- Current - Output:
- 1A
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (3x3)
LM2734ZQSDE/NOPB FAQ
1.How can I place an order for LM2734ZQSDE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2734ZQSDE/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 LM2734ZQSDE/NOPB reliable?
The price and inventory of LM2734ZQSDE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2734ZQSDE/NOPB is usually 5 days.
3.What payment methods are accepted for LM2734ZQSDE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2734ZQSDE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2734ZQSDE/NOPB?
LM2734ZQSDE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2734ZQSDE/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 LM2734ZQSDE/NOPB?
For technical support, including LM2734ZQSDE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2734ZQSDE/NOPB requirements.
6.How does Aetrix verify that LM2734ZQSDE/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2734ZQSDE/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 LM2734ZQSDE/NOPB meets industry standards.
7.What is the process for return or replacement of LM2734ZQSDE/NOPB?
All LM2734ZQSDE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2734ZQSDE/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 LM2734ZQSDE/NOPB part is unused and in its original packaging.
Return procedure for LM2734ZQSDE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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