The CAT6219-330TDGT3, a 500 mA CMOS Low-Dropout (LDO) voltage regulator manufactured by ON Semiconductor, boasts robust performance, low power consumption, and multiple protective features. It finds extensive applications in mobile phones, battery-powered devices, consumer electronics, and handheld instruments. This article delves into the primary features and specifications of the CAT6219-330TDGT3, aiming to provide readers with a comprehensive understanding of its capabilities and use cases.
- Key Features
Fast Response Time
The CAT6219-330TDGT3 exhibits a swift response time during changes in load current and line voltage. This ensures stable operation under dynamic load conditions, enhancing the overall system performance.
Fast Start-Up Capability
Featuring a fast start-up function, the regulator allows the use of an external bypass capacitor, thereby reducing overall output noise. This design not only improves noise suppression but also doesn't compromise on the turn-on time of just 150 µs.
Low Dropout Voltage and Quiescent Current
With zero shutdown current and a typical quiescent current of 55µA, the CAT6219-330TDGT3 is well-suited for battery-powered devices operating from a supply voltage of 2.3 V to 5.5 V. This characteristic extends battery life and enhances device endurance.
Internal Under-Voltage Lockout (UVLO) Circuit
The internal UVLO circuit automatically disables the output when the supply voltage falls below a typical value of 2.15 V, protecting the circuit from low-voltage conditions. This feature enhances circuit reliability and safety.
High Accuracy and Low Dropout Voltage
The regulator offers an initial accuracy of 1% and a low dropout voltage, with a typical value of 300 mV at 500 mA. This high accuracy and low dropout voltage ensure stable and precise output voltage, making it suitable for applications with stringent power quality requirements.
Small Ceramic Output Capacitor
Stable operation is achieved using a small ceramic output capacitor, reducing the required board space and component cost. This design makes the CAT6219-330TDGT3 an ideal choice for high-density electronics.
Multiple Protection Features
The CAT6219-330TDGT3 includes current limiting and thermal shutdown protection, automatically shutting down the output under over-current and over-temperature conditions to prevent circuit damage. These protective features enhance circuit reliability and durability.
Fixed and Adjustable Outputs
The regulator offers both fixed and adjustable outputs to cater to various application needs. Additionally, it adopts a thin (max height 1 mm) 5-lead TSOT23 package for easy integration and installation.
- Specifications
Output Type: Fixed
Maximum Input Voltage: 5.5 V
Output Current: 500 mA
Output Voltage (Min/Fixed): 3.3 V
Initial Accuracy: ±1.0% (VOUT ≥ 2.0 V)
Temperature Accuracy: ±2.0% (VOUT ≥ 2.0 V)
Dropout Voltage: 300 mV (typical, 500 mA)
No-Load Ground Current: 55µA (typical)
Full-Load Ground Current: 85µA (typical)
Package: 5-Lead TSOT-23
Operating Temperature Range: -40°C to +125°C
RoHS Compliance: Compliant
III. Pin Description
The pin configuration of the CAT6219-330TDGT3 includes VIN (power input pin), GND (ground pin), EN (enable control logic pin, active high), VOUT (regulated output pin), and NC/ADJ (not connected/adjustable pin). A small 1µF ceramic bypass capacitor is required between the VIN pin and the ground near the device to reduce input noise. The EN pin has a 2.5 MΩ pull-down resistor, ensuring that if the EN pin remains open, the circuit is disabled. The VOUT pin outputs a stable 3.3 V voltage, and an optional 0.01µF capacitor can be connected between the BYP pin and GND to reduce output noise and improve PSRR (Power Supply Rejection Ratio) at high frequencies.
- Application Areas
With its high performance and low power consumption, the CAT6219-330TDGT3 is widely used in various battery-powered devices, mobile phones, consumer electronics, and handheld instruments. Its small package size and multiple protective features make it an ideal choice for these applications.
In conclusion, the CAT6219-330TDGT3 is a powerful, stable, and easy-to-integrate LDO voltage regulator. Its fast response time, low dropout voltage and quiescent current, high accuracy, and multiple protective features make it an ideal choice for battery-powered devices and handheld instruments. Additionally, its small package size and cost-effective design offer broad application prospects in high-density electronics.
