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MIC2128 数据表(PDF) 1 Page - Microchip Technology |
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MIC2128 数据表(HTML) 1 Page - Microchip Technology |
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1 / 32 page  2016 Microchip Technology Inc. DS20005620A-page 1 MIC2128 Features • Hyper Speed Control® Architecture Enables: - High Input to Output Voltage Conversion Ratio Capability - Any Capacitor™ Stable - Ultra-Fast Load Transient Response • Wide 4.5V to 75V Input Voltage Range • Adjustable Output Voltage from 0.6V to 30V • 270 kHz to 800 kHz Programmable Switching Frequency • Built-in 5V Regulator for Single-Supply Operation • Auxiliary Bootstrap LDO for Improving System Efficiency • Internal Bootstrap Diode • Adjustable Soft-Start Time • Enable Input and Power Good Output • Programmable Current Limit • Hiccup Mode Short-Circuit Protection • Internal Compensation and Thermal Shutdown • Supports Safe Start-Up into a Prebiased Output Applications • Networking/Telecom Equipment • Base Station, Servers • Distributed Power Systems • Industrial Power Supplies General Description The MIC2128 is a constant-frequency synchronous buck controller featuring a unique adaptive on-time control architecture with external soft start. The MIC2128 operates over an input voltage range from 4.5V to 75V.The output voltage is adjustable down to 0.6V with a guaranteed accuracy of ±1%. The device operates with programmable switching frequency from 270 kHz to 800 kHz. The MIC2128 features an external soft-start pin (SS) which allows the user to adjust output soft-start time to reduce inrush current from mains during start-up. The MIC2128 features an auxiliary bootstrap LDO which improves the system efficiency by supplying the MIC2128 internal circuit bias power and gate drivers from output of the converter. A logic level enable (EN) signal can be used to enable or disable the controller.The MIC2128 can start-up monotonically into a prebiased output. The MIC2128 features an open drain power good signal (PG) which signals when the output is in regulation and can be used for simple power supply sequencing purpose. The MIC2128 offers a full suite of protection features to ensure protection of the IC during Fault conditions. These include undervoltage lockout to ensure proper operation under power-sag conditions, “hiccup” mode short-circuit protection and thermal shutdown. The MIC2128 is available in a 16-pin 3 mm x 3 mm QFN package, with an operating junction temperature range from -40°C to +125°C. Package Types 2 SW BST PG SS FREQ EN EXTVDD ILIM 16 1 15 14 13 3 4 11 10 9 56 7 8 12 MIC2128 3x3 QFN* (Top View) EP * Includes Exposed Thermal Pad (EP); see Table 3-1. 75V, Synchronous Buck Controller Featuring Adaptive On-Time Control with External Soft Start |
类似零件编号 - MIC2128 |
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类似说明 - MIC2128 |
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