TEXAS INSTRUMENTS LM2738XMY 直流-直流开关降压逐步递减稳压器, 可调, 3V-20V输入, 800mV-18V输出, 1.5A输出, MSOP-8
The is a monolithic high-frequency PWM step-down DC-to-DC Converter provides all the active functions for local DC-to-DC conversion with fast transient response and accurate regulation in the smallest possible PCB area. With a minimum of external components, the LM2738 is easy to use. The ability to drive 1.5A loads with an internal 250mR NMOS switch using state-of-the-art 0.5µm BiCMOS technology results in the best power density available. Switching frequency is internally set to 1.6MHz, allowing the use of extremely small surface-mount inductors and chip capacitors. Even though the operating frequencies are very high, efficiencies up to 90% are easy to achieve. External enable is included, featuring an ultralow standby current of 400nA. The LM2738 utilizes current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions.
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- Internal soft-start function
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- Current-mode and PWM operation
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- Thermal shutdown
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- 250mR NMOS switch
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- 400nA Shutdown current
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- 0.8V Internal voltage reference with2% accuracy
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- Green product and no Sb/Br
