HGSEMI MIC29302WS/TR

MIC29302W is a high-current, low-dropout regulator utilizing a proprietary Super Beta PNP process and PNP pass transistor. This 3A LDO regulator features a dropout voltage of 300mV to 370mV (full load) and extremely low ground current. It is designed for high-current loads while also being suitable for low-current, low-dropout critical systems where dropout voltage and ground current values are paramount. The regulator offers ±2% total accuracy across temperature, line, and load regulation, with fast transient recovery from input voltage surges and output load current variations. The MIC29302W features an adjustable output, with the output voltage settable between 1.24V and 15V via two external resistors. The device is fully protected against overcurrent faults, reverse input voltage, reverse insertion, and over-temperature operation. The MIC29302W provides a TTL/CMOS logic enable pin for regulator shutdown. When not in use, the device can be set for continuous operation by connecting the EN pin to the input. The MIC29302W is available in standard TO-263-5L, TO-220-5L, and TO-252 packages, with an operating junction temperature range of -40°C to +125°C. This high-performance LDO regulator is suitable for all medium- to high-current voltage regulation applications. Its typical dropout voltage of 560 mV at full load makes it particularly valuable in battery-powered systems and as a post-regulator high-efficiency noise filter. Unlike legacy NPN pass transistor designs where minimum dropout voltage is limited by the base-emitter voltage drop and collector-emitter saturation voltage, the PNP output's dropout performance is limited only by the low VCE saturation voltage. The trade-off for achieving low dropout voltage is varying base drive requirements, but the Super Beta PNP process reduces this drive requirement to only 1% of the load current. The MIC29302W regulator is fully protected under fault conditions. Current limiting is linear; output current remains constant under overload conditions. Thermal shutdown disables the device when the die temperature exceeds the maximum safe operating temperature of +125°C. The regulator's output structure allows voltages exceeding the required output voltage to be applied without generating reverse current. The MIC29302W provides logic-level switching control. When disabled, the device consumes 32 μA at a maximum input of 16V. A capacitor must be used at the regulator output to maintain stability and minimize output noise. The required capacitance depends on the output current; lower currents allow the use of smaller capacitors. The MIC29302W remains stable with a 10 μF capacitor at full load. This capacitor need not be an expensive low-ESR type; aluminum electrolytic capacitors are sufficient. In fact, very low ESR capacitors may cause instability. Tantalum capacitors are recommended for systems with demanding load transient response requirements.

• High current capability
• Operating input voltage range: 3V to 16V
• Low dropout voltage
• Low ground current
• Precise 1% tolerance
• Fast transient response
• Adjustable output voltage: 1.24V to 15V
• Packages: TO-263-5, TO-220-5, and TO-252-4