RAA211820 4.5V to 75V, 2A, DC/DC Synchronous Step-Down Regulator w/ Internal Compensation and Adjustable Frequency Datasheet
●The RAA211820 uses peak-current mode control architecture. Its PWM switching frequency is programmable to provide the best trade-off between transient response and efficiency. It also supports PFM operation and DEM to maximize light load efficiency, in addition to an external bias LDO input to further reduce power dissipation across the load range. The regulator also has an internal loop compensation circuit to reduce the external component count and BOM cost.
●The RAA211820 provides useful functions such as internal or programmable soft-start and power good indicator. For safe operation, the RAA211820 also offers protection features such as cycle-by-cycle peak and valley current limit, input voltage UVLO, output voltage undervoltage (short-circuit) protection, and thermal shutdown.
●Features
■Wide input voltage range: 4.5V to 75V
■Adjustable output voltage: 0.8V to 90% of VIN
■Up to 2A of continuous output current
■Default 400kHz switching frequency and programmable switching frequency range from 200kHz to 800kHz
■±1% Load regulation accuracy from -40°C to 125°C, ±0.5% Load regulation accuracy at 25°C
■95μA typical quiescent current
■Internal compensation
■Internal 0.5ms soft-start in QFN
■External programmable soft-start (HTSSOP)
■PFM operation and DEM at light load
■Integrated external bias LDO
■Power good indicator
■Integrated MOSFET rDS(ON) (typical): 155mΩ/80mΩ (QFN); 200mΩ/95mΩ (TSSOP)
■Cycle-by-cycle peak and valley current limit
■Input voltage UVLO and output voltage undervoltage (short-circuit) protection
■Thermal Shutdown
■Available in 20 Ld QFN 4mm × 3.5mm and 16 Ld HTSSOP packages
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DC/DC Synchronous Step-Down Regulator 、 DC/DC synchronous step-down (Buck) regulator |
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[ Industrial power systems ][ Distributed power supplies ][ general-purpose point-of-load ][ Telecommunication base station power supplies ][ High-voltage single-board systems ] |
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Datasheet |
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Please see the document for details |
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QFN;HTSSOP |
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English Chinese Chinese and English Japanese |
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Oct 12, 2022 |
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Rev.1.01 |
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R16DS0185EU0101 |
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2.8 MB |
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