LM25141
Synchroner Abwärts-Controller (Buck), niedriger Ruhestrom, großer Eingangsbereich
Eine neuere Version dieses Produkts ist verfügbar
LM25141
- –40°C to +125°C Ambient Operating Temperature Range
- An AEC-Q100 Qualified Device is Available
- VIN 3.8 V to 45 V (47 V Absolute Maximum)
- Output: Fixed 3.3 V, 5 V, or Adjustable From
1.5 V - 15 V with ±0.8% Accuracy - Fixed 2.2 MHz or 440 kHz Switching Frequency with ±5% Accuracy
- High-Side and Low-Side Gate Drive With Slew Rate Control
- Optional Frequency Shift by Varying an Analog Voltage or RT Resistor
- Optional Synchronization to an External Clock
- Optional Spread Spectrum
- Shutdown Mode IQ: 10 µA Typical
- Low Standby Mode IQ: 35 µA Typical
- 75 mV Current Limit Threshold with ±0.9% Accuracy
- External Resistor or DCR Current Sensing
- Output Enable Logic Input
- Hiccup Mode for Sustained Overload
- Power Good Indication Output
- Selectable Diode Emulation or Forced Pulse Width Modulation
- QFN-24 Package with Wettable Flanks
- Create a Custom Design Using the LM25141 With the WEBENCH® Power Designer
The LM25141 is a synchronous buck controller, intended for high voltage wide VIN step-down converter applications. The control method is peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation. The LM25141 features slew rate control to simplify the compliance with EMI requirements.
The LM25141 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate Drivers with slew rate control that can be adjusted to reduce EMI.
In light or no-load conditions, the LM25141 operates in skip cycle mode for improved low power efficiency. The LM25141 has a high voltage bias regulator with automatic switch-over to an external bias to reduce the IQ current from VIN. Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup mode fault protection for sustained overload, and power good output.
Technische Dokumentation
Typ | Titel | Datum | ||
---|---|---|---|---|
* | Data sheet | LM25141 Wide Input Range Synchronous Buck Controller datasheet | PDF | HTML | 02 Feb 2017 |
Functional safety information | LM25141 Functional Safety FIT Rate, Failure Mode Distribution, and Pin FMA | PDF | HTML | 05 Apr 2022 | |
E-book | An Engineer’s Guide to Low EMI in DC/DC Regulators | 21 Apr 2021 | ||
White paper | Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) | 10 Apr 2019 | ||
White paper | An overview of radiated EMI specifications for power supplies | 05 Jun 2018 | ||
White paper | An overview of conducted EMI specifications for power supplies | 01 Feb 2018 | ||
EVM User's guide | LM5141-Q1 EVM User’s Guide (Rev. A) | 10 Jan 2018 | ||
Application brief | Improve DC/DC Regulator EMI for Free with Optimized Power Stage Layout | 13 Nov 2017 | ||
Analog Design Journal | Designing the front-end DC/DC conversion stage to withstand automotive transient | 18 Jan 2017 | ||
Analog Design Journal | Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics | 21 Jul 2016 |
Design und Entwicklung
Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.
LM5141QRGEVM — LM5141QRG Synchron-Abwärtswandler – Evaluierungsmodul
LM5141-Q1 and LM25141-Q1 PSpice Transient Model (Rev. A)
Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
---|---|---|
VQFN (RGE) | 24 | Ultra Librarian |
Bestellen & Qualität
- RoHS
- REACH
- Bausteinkennzeichnung
- Blei-Finish/Ball-Material
- MSL-Rating / Spitzenrückfluss
- MTBF-/FIT-Schätzungen
- Materialinhalt
- Qualifikationszusammenfassung
- Kontinuierliches Zuverlässigkeitsmonitoring
- Werksstandort
- Montagestandort
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