LM27403SQE/NOPBIn StockTexas Instruments
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
Key Features
- 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
Applications
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.
Specifications
| 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 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
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.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 137+ | $1.4609 | $200.14 |
| 178+ | $1.4059 | $250.25 |
| 223+ | $1.3510 | $301.27 |
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