LMR54406 Texas Instruments Integrated Circuit (Other) In Stock
The LMR54406 is a SIMPLE SWITCHER synchronous buck converter from Texas Instruments, supporting 4.5 V to 36 V input and delivering up to 0.6 A output current with an ultra-low 80-µA quiescent current. It integrates high-side and low-side MOSFETs for high efficiency in space-constrained designs. Available in stock worldwide with competitive pricing and fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 6
- Lifecycle
- ACTIVE
- Datasheet
- LMR54406 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Ultra-low 80-µA quiescent current enables exceptional light-load and standby efficiency
- Wide 4.5 V to 36 V input range supports automotive and industrial supply rails
- Integrated synchronous MOSFETs reduce external component count and PCB footprint
Applications
The LMR54406 is well-suited for always-on bias supplies in industrial control systems, automotive body electronics, and IoT sensor nodes where minimizing standby power is critical. Its wide input range and synchronous topology make it ideal for 12 V and 24 V industrial bus step-down applications. Compact smart-meter and building-automation designs also benefit from the low quiescent current and minimal BOM.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LMR54406:
Switching Regulator, Current-mode, 0.6A, 1100kHz Switching Freq-Max, BICMOS, PDSO6
Switching Regulator, Current-mode, 0.6A, 1100kHz Switching Freq-Max, BICMOS, PDSO6
Frequently Asked Questions
How low is the quiescent current of LMR54406, and why does it matter for battery-backed systems?
The LMR54406 draws only 80 µA of quiescent current, which dramatically extends battery life in always-on applications. For a 1000 mAh coin-cell backup supply, this translates to over 500 days of standby operation, making it ideal for metering and IoT edge nodes.
Which input voltage rails can the LMR54406 regulate from in a 24 V industrial system?
The LMR54406 accepts input voltages from 4.5 V to 36 V, covering standard 12 V and 24 V industrial rails without an intermediate regulator. This wide range also tolerates load-dump transients up to 36 V, protecting downstream logic circuitry.
When would a designer choose LMR54406 over a non-synchronous buck for a 0.6 A rail?
For output currents up to 0.6 A, the LMR54406 integrated synchronous rectifier eliminates the external Schottky diode, reducing BoM cost and conduction losses at moderate to heavy loads. The efficiency advantage over non-synchronous designs can reach 5-10 percentage points at 0.3 A output with a 12 V input.
What output voltage accuracy can be expected from the LMR54406 across its full temperature range?
The LMR54406 regulates to an internal reference with ±1% accuracy across the -40°C to 125°C operating temperature range, ensuring stable 3.3 V or 5 V output rails even in thermally demanding automotive or outdoor enclosures.
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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.
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