AOZ1284PI-1_2
AOZ1284PI-1_2 Datasheet
AOZ1284
| Part | Datasheet |
|---|---|
AOZ1284PI-1_2 |
AOZ1284PI-1_2 (pdf) |
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| AOZ1284 EZBuck 4A Simple Buck Regulator The AOZ1284 is a high voltage, high efficiency, simple to use, 4A buck regulator optimized for a variety of applications. The AOZ1284 works from a 3.0V to 36V input voltage range, and provides up to 4A of continuous output current. The output voltage is adjustable from 30V down to 0.8V. The AOZ1284 integrates an N-channel high-side power MOSFET. The switching frequency can set from 200kHz to 2MHz with an external resistor. The soft-start time can be set with an external capacitor. • 3.0V to 36V operating input voltage range • internal NMOS • Efficiency up to 95% • Adjustable soft-start • Output voltage adjustable from 0.8V to 30V • 4A continuous output current • Adjustable switching frequency from 200kHz to 2MHz • Cycle-by-cycle current limit • Short-circuit protection • Over-voltage protection • Over-temperature protection • EPAD SO-8 package • Point of load DC/DC conversion • Set top boxes and cable modems • Automotive applications • DVD drives and HDDs • LCD Monitors & TVs • Telecom/Networking/Datacom equipment Figure 36V/4A Buck Regulator Page 1 of 14 AOZ1284 Ordering Information Part Number AOZ1284PI-1 Temperature Range -40°C to +85°C Package EPAD SO-8 Environmental Green Product AOS Green Products use reduced levels of Halogens, and are also RoHS compliant. Please visit for additional information. Pin Configuration LX 1 BST 2 GND 3 FSW 4 Exposed PAD 8 EN 7 SS 6 FB 5 COMP EPAD SO-8 Top View Pin Description Part Number 1 2 Pin Name LX BST COMP Exposed PAD Pin Function PWM Output Pin. Connect to inductor. Bootstrap Voltage Pin. Driver supply for High Side NMOS. Connected to 100nF capacitor between BST and LX. Ground Pin. Frequency Bias Pin. Connect to resistor to determine switching frequency. Compensation Pin. Connect to Resistor and Capacitor for system stability. Feedback Pin. It is regulated to 0.8V. The FB pin is used to determine the PWM output voltage via a resistor divider between the Output and Ground. Soft Start Pin. Enable Pin. Supply Voltage Pin. Page 2 of 14 Functional Block AOZ1284 Absolute Maximum Ratings Exceeding the Absolute Maximum Ratings may damage the device. Parameter Supply Voltage VIN LX to GND EN, SS, FB and COMP to GND BST to GND Junction Temperature TJ Storage Temperature TS ESD Rating HB Model 1 Rating 40V -0.7V to VIN+0.3V -0.3V to +6V -0.3V to VLX+6V +150°C -65°C to +150°C Note: Devices are inherently ESD sensitive, handling precautions are required. Human body model rating in series with 100pF. Recommended Operating Ratings This device is not guaranteed to operate beyond the Recommended Operating Ratings. Parameter Supply Voltage VIN Output Voltage VOUT Ambient Temperature TA Package Thermal Resistance EPAD SO-8 Rating 3.0V to 36V 0.8V to VIN*0.85V -40°C to +85°C 50°C/W Page 3 of 14 AOZ1284 Electrical Characteristics |
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