LM26003QMH Texas Instruments In Stock
LM26003QMH is an automotive-qualified 3 A synchronous buck converter by Texas Instruments. Key specs: 3 V to 36 V input range, 200 kHz to 2.2 MHz adjustable switching frequency, and integrated high-side and low-side MOSFETs. Available in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- —
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM26003QMH?
- 3 A continuous output current with integrated MOSFETs for a compact, high-efficiency step-down design
- Wide 3 V to 36 V input voltage range supporting 12 V and 24 V automotive and industrial rails
- Adjustable switching frequency from 200 kHz to 2.2 MHz allowing EMI-noise management and filter optimization
- AEC-Q100 Grade 1 automotive qualification for operation from -40°C to +125°C
- Spread-spectrum frequency dithering option for reducing peak EMI in conducted-emission-sensitive designs
- Hiccup-mode over-current protection and thermal shutdown for robust power-stage protection
What is LM26003QMH used for?
LM26003QMH is designed for automotive infotainment, ADAS power rails, and telematics control units where a wide-input synchronous buck converter must survive 36 V load-dump transients and operate across the full automotive temperature range. It is equally suited to industrial 24 V bus step-down regulators in PLCs, motor drives, and distributed power architectures requiring an efficient, integrated-switch solution.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
What are equivalent replacements for LM26003QMH?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Can LM26003QMH survive a 36 V automotive load-dump transient while powering a 5 V rail?
Yes. LM26003QMH is rated for input voltages up to 36 V, which covers the ISO 7637 Class C load-dump pulse typical in 12 V automotive systems. With a 5 V output target, the converter maintains regulation and then recovers cleanly as the transient subsides, making it suitable for body-control modules, infotainment, and ADAS ECUs exposed to battery-disconnect spikes.
How does selecting a higher switching frequency on LM26003QMH reduce the external inductor size?
Inductor volt-second product is inversely proportional to switching frequency. At the maximum 2.2 MHz switching frequency, a 3 A design can use an inductor as small as 2.2 µH versus 22 µH at 200 kHz, reducing the inductor footprint and height significantly. This trade-off also increases core losses, so designers typically choose 500 kHz to 1 MHz as a balance point between size and efficiency for 12 V automotive applications.
What AEC qualification grade does LM26003QMH carry, and what operating temperature range does it support?
LM26003QMH carries AEC-Q100 Grade 1 qualification, certifying reliable operation from -40°C to +125°C junction temperature. This makes it eligible for under-hood and engine-compartment applications in automotive systems where ambient temperatures routinely exceed 85°C, and where supply-chain certification to AEC-Q100 is a Tier-1 procurement requirement.
For an industrial 24 V to 3.3 V point-of-load converter, how does LM26003QMH's integrated-MOSFET design simplify the BOM?
LM26003QMH integrates both the high-side and low-side power MOSFETs, so the designer needs only an external inductor, input/output capacitors, and a feedback resistor divider to build a complete 3 A step-down converter. This eliminates the separate gate-driver IC and discrete MOSFET pair that a controller-only solution requires, reducing total BOM by 4 to 6 components and shrinking the power-stage PCB area.
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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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