LMR51440
Synchroner 4-A-Abwärtswandler, 36 V
LMR51440
- Functional Safety-Capable
- Configured for rugged industrial applications
- Wide Input voltage range: 4 V to 36 V
- 4-A or 5-A continuous output current
- ±1.0% tolerance voltage reference at room temperature
- Minimum switching-on time: 75 ns (typical)
- Low Quiescent current: 25 µA
- Adjustable Frequency: 200 kHz to 1.1 MHz
- Frequency spread spectrum (PFM variant)
- Protection features
- Precision enable input
- Open-drain PGOOD
- VIN undervoltage lockout (UVLO)
- Cycle-by-cycle current limiting
- Short-circuit protection with hiccup mode
- Thermal shutdown
- Low dropout mode operation
- Junction temperature range: –40°C to 150°C
- Small solution size and ease of use
- Integrated synchronous rectification
- Internal compensation for ease of use
- WSON-12 package
- Various options in pin-to-pin compatible package
- PFM and forced PWM (FPWM) options
- Create a custom design using the LMR5144x0 with the WEBENCH® Power Designer
The LMR514x0 is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 4-A or 5-A load current. With a wide input range of 4 V to 36 V, the device is suitable for a wide range of industrial applications for power conditioning from an unregulated source.
The LMR514x0 features adjustable switching frequency from 200 kHz to 1.1 MHz with an external resistor, which provides the flexibility to optimize either efficiency or external component size. The device has PFM version to realize high efficiency at light load and FPWM version to achieve constant frequency, and small output voltage ripple over the full load range. Soft-start and compensation circuits are implemented internally which allows the device to be used with minimum external components.
The device has built-in protection features, such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR514x0 is available in WSON-12 package.
Technische Dokumentation
Typ | Titel | Datum | ||
---|---|---|---|---|
* | Data sheet | LMR514x0, 36-V, 4-A/5-A Synchronous Step-Down DC/DC Converter With Low IQ datasheet | PDF | HTML | 05 Dez 2022 |
Functional safety information | LMR51440 and LMR51450 Functional Safety FIT Rate, FMD and Pin FMA | PDF | HTML | 21 Nov 2022 |
Design und Entwicklung
Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.
LMR51450EVM — Evaluierungsmodul für synchronen LMR51450 Abwärtswandler
Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
---|---|---|
WSON (DRR) | 12 | Ultra Librarian |
Bestellen & Qualität
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- Werksstandort
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