ADP2441ACPZ-R2

36 V ， 1 A，同步，降压的DC- DC稳压器 36 V,1 A, Synchronous, Step-Down DC-to-DC Regulator

Product Details

The ADP2441/ADP2442 is a constant frequency, current mode control, synchronous, step-down dc-to-dc regulator that is capable of driving loads up to 1 A with excellent line and load regulation characteristics. The ADP2441 operates with a wide input voltage range of 4.5 V to 36 V, which makes it ideal for regulating power from a wide variety of sources. In addition, the ADP2441 has very low minimum on time 50 ns and is, therefore, suitable for applications requiring a very high step-down ratio.

The output voltage can be adjusted from 0.6 V to 0.9 V × VIN. High efficiency is obtained with integrated low resistance N-channel MOSFETs for both high-side and low-side devices.

The switching frequency is adjustable from 300 kHz to 1 MHz with an external resistor. The ADP2441 also has an accurate power-good PGOOD open-drain output signal.

At light load conditions, the regulator operates in pulse skip mode by skipping pulses and reducing switching losses to improve energy efficiency. In addition, at medium to heavy load conditions, the regulator operates in fixed frequency pulse-width modulation PWM mode to reduce electromagnetic interference EMI.

The ADP2441 uses hiccup mode to protect the IC from short circuits or from overcurrent conditions on the output. The external programmable soft start limits inrush current during startup for a wide variety of load capacitances. Other key features include tracking, input undervoltage lockout UVLO, thermal shutdown TSD, and precision enable EN, which can also be used as a logic level shutdown input.

The ADP2441 is available in a 3 mm × 3 mm, 12-lead LFCSP package and is rated for a junction temperature range of −40°C to +125°C.

Applications

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Point of load applications

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Distributed power systems

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Industrial control supplies

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Standard rail conversion to 24 V/12 V/5 V/3.3 V

### Features and Benefits

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Wide input voltage range of 4.5 V to 36 V

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Low minimum on time of

50 ns

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Maximum load current of 1 A

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High efficiency of up to 94%

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Adjustable output down to 0.6 V

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±1% output voltage accuracy

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Adjustable switching frequency of 300 kHz to

1 MHz

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Pulse skip mode at light load for power saving

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Precision enable input pin

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Open-drain power good

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External soft start with tracking

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Overcurrent-limit protection

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Reference similar product ADP2442 with synchronization capability.

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See data sheet for additional features.