R1273L-Y Series 34V, 1ch_14A Synchronous Step-down DC/DC Converter for Industrial Applications
■The R1273L is a step-down DC/DC converter which can generate an output voltage of 0.7 V to 5.3 V by driving high- / low-side NMOSs. By the adoption of a unique current mode PWM architecture without an external current sense resistor, the R1273L can make up a stable DC/DC converter with high-efficiency even if adding a low DCR inductor externally. And, by the frequency characteristics optimization with using external phase compensation capacitor, the R1273L can achieve a high-speed response to variations of input voltage and load current. The user-settable oscillation frequency is adjustable over a range of 250 kHz to 1 MHz by external resistors, and also can be synchronized to an external clock in a range of 250 kHz to 1 MHz. The R1273L supports three operating modes: Forced PWM mode, PLL_PWM mode, and PWM/VFM Auto-switching mode.
■These modes are selectable according to conditions of the MODE pin. Especially, the PWM/VFM Auto-switching mode can improve efficiency under light load conditions.
■The R1273L can minimize the output voltage drop caused by an input voltage drop at cranking, with reducing the operating frequency (the lowest possible limit is a quarter of the frequency) so that the off-duty is reduced. Protection functions include a current limit function, a hiccup-mode short-circuit protection (non-latch type), a thermal shutdown function, an UVLO (Under Voltage Lock Out) function, an OVD (Over Voltage Detection) function, a soft-start function, a low-inductor current shutdown function, and so on. Also, a power good function provides the status of output with using a power good (PGOOD) pin.
■For EMI reduction, SSCG (Spread-Spectrum Clock Generator) for diffused oscillation frequency at the PWM operation is optionally available. The R1273L is available in QFN0505-32B package.
■This is a high-reliability semiconductor device for industrial application (-Y) that has passed both the screening at high temperature and the reliability test with extended hours.
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R1273L-Y Series 、 R1273L-Y 、 R1273LxxyA-E2-Y 、 R1273LxxxA 、 R1273Lxx1x 、 R1273Lxx2x 、 R1273Lxx3x 、 R1273L00x 、 R1273L01x 、 R1273L03x 、 R1273L0xx 、 R1273L1xx 、 R1273L03xA 、 R1273L0313xA 、 R1273L001A 、 R1273L002A 、 R1273L003A 、 R1273L011A 、 R1273L012A 、 R1273L013A 、 R1273L031A 、 R1273L032A 、 R1273L033A 、 R1273L101A 、 R1273L102A 、 R1273L103A 、 R1273L111A 、 R1273L112A 、 R1273L113A 、 R1273L131A 、 R1273L132A 、 R1273L133A |
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Synchronous Step-down DC/DC Converter 、 step-down DC/DC converter 、 converter |
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[ Industrial Applications ][ Industrial equipment ][ FAs ][ smart meters ][ surveillance camera ][ vending machine ][ Equipment accompanied by self-heating ][ motor ][ lighting ] |
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Datasheet |
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Please see the document for details |
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QFN0505-32B |
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English Chinese Chinese and English Japanese |
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2022/2/18 |
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EY-352-220204 |
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2.3 MB |
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