LM27403SQE/NOPB Texas Instruments power-management (WSON-12) In Stock
LM27403SQE/NOPB is a 20A synchronous buck controller with adaptive on-time control, WSON-12. From $0.75 at 100K+pcs. In stock, ships globally.
- Manufacturer
- Texas Instruments
- Package
- WSON-12
- Pin Count
- 12
- Lifecycle
- ACTIVE
- Datasheet
- LM27403SQE/NOPB Datasheet PDF
- Category
- power-management
- Price
- From $1.3510(MOQ 137)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM27403SQE/NOPB?
- Adaptive on-time control: no external compensation needed
- Supports 4.5V to 16V input, 0.6V to 5.5V output
- Drives external MOSFETs for up to 20A+ output
- 600kHz to 2MHz adjustable switching frequency
- Voltage tracking and soft-start for sequencing
What is LM27403SQE/NOPB used for?
Designed for FPGA core power, DSP and processor VCC rails, high-current point-of-load regulation, and telecom board power. Suitable for applications requiring high current density with flexible MOSFET selection.
What are the specifications of LM27403SQE/NOPB?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | ADJUSTABLE OUTPUT MODE FROM 0.6 TO 18.6V |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 20V |
| Input Voltage-Min | 3V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | S-XQCC-N24 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 30A |
| Output Voltage-Max | 19V |
| Output Voltage-Min | 0.6V |
| Package Body Material | UNSPECIFIED |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 1200kHz |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| ## LM27403SQE/NOPB Alternates Showing results | Image |
| Package | WSON-12 |
Compliance & Regulatory
| RoHS Status | Compliant |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the LM27403SQE/NOPB datasheet?
LM27403SQE/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM27403SQE/NOPB?
Compatible alternatives and drop-in replacements for LM27403SQE/NOPB:
suggested
suggested
suggested
Frequently Asked Questions
What current can LM27403 support?
The LM27403 controller can drive external MOSFETs for output currents exceeding 20A. The actual current limit depends on the selected MOSFETs and inductor. TI recommends CSD87350 or similar NexFET power stages for optimal performance.
Why does LM27403 use adaptive on-time control?
Adaptive on-time (AOT) eliminates the need for external compensation components (RC networks), simplifying design. It provides inherently fast transient response within 1-2 clock cycles, critical for processors with rapid load transients.
What input voltage does LM27403 accept?
LM27403 operates from 4.5V to 16V input, covering 5V and 12V bus voltages. Output is adjustable from 0.6V (reference voltage) up to 5.5V via resistor divider. Common outputs include 0.9V, 1.0V, 1.2V, 1.8V, and 3.3V.
Does LM27403 support voltage tracking?
Yes, LM27403 includes a tracking input that allows the output to follow another voltage rail during power-up. This is essential for FPGA and processor power sequences where core and I/O rails must track each other to prevent latch-up.
Related Guides
How to Choose Würth Elektronik 150141-Series SMD Indicator LEDs
Choose 150141RS73100 and related Würth 150141 LEDs by color, brightness, 3528 package fit, drive margin, and procurement controls.
Jul 15, 2026
Molex 53398-0371 Selection Guide: Choosing a 3-Circuit Wire-to-Board Header
Choose Molex 53398-0371 by circuit count, mating system, derating, PCB geometry, assembly needs, and exact-suffix sourcing.
Jul 15, 2026
53398-0371 Compact Wire-to-Board Connector Design Guide
Design a reliable 53398-0371 compact wire-to-board interface with proven layout, crimp, strain-relief, and validation practices.
Jul 14, 2026
742792651 Ferrite Bead Selection Guide for EMI and Power Integrity
Choose a 742792651-class ferrite bead by balancing impedance, DC bias, resistance, thermal limits, and filter stability.
Jul 14, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 137+ | $1.4609 | $200.14 |
| 178+ | $1.4059 | $250.25 |
| 223+ | $1.3510 | $301.27 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”