MP3309 Datasheet | Monolithic Power Systems

DESCRIPTION The MP3309 is a WLED step-up converter for 2.7V to 5.5V input that uses peak-current mode to regulate the LED current sensed through an external, low-side resistor. The 200m V feedback voltage and synchronous rectification reduces power loss and reduces PCB space requirements. The MP3309 features a programmable switching frequency to optimize efficiency. It supports both analog and PWM dimming. In addition, the MP3309 has LED open protection, cycle-by-cycle current limit protection, Under voltage protection and thermal shutdown protection . FEATURES - 2.7V to 5.5V Input Voltage - Analog and PWM Dimming - Programmable Switching Frequency - Low 200m V Feedback Voltage with ±1% Accuracy at Room Temperature - Internal Soft Start - Under-Voltage Lockout (UVLO), Thermal Shutdown, and Over-Current Protection (OCP) - Available in a QFN-10 (1.4mmx1.8mm) Package APPLICATIONS - Feature Phones and Smart Phones - Tablets - <10in Video Displays All MPS parts are lead-free, halogen-free, and adhere to the Ro HS directive. For MPS green status, please visit the MPS website under Quality Assurance. “MPS”, the MPS logo, and “Simple, Easy Solutions” are trademarks of Monolithic Power Systems, Inc. or its subsidiaries. TYPICAL APPLICATION C1 PWMH EN/PWML R2 L1 C2 SW BST C3 VOUT PWMH PWMH EN/PWML FREQ R1 GND Typical Application Circuit MP3309 Rev....