TPS61305A Datasheet | Texas Instruments

Features - 1 Four Operational Modes - DC Light and Flashlight - Voltage Regulated Converter: 3.8 V to 5.7 V - Standby: 2 μA (Typical) - Storage Capacitor Friendly Solution - Automatic VF and ESR Calibration - Power-Save Mode for Improved Efficiency at Low Output Power, Up to 95% Efficiency - Output Voltage Remains Regulated When Input Voltage Exceeds Nominal Output Voltage - I2C patible Interface up to 3.4 Mbits/s - Zero Latency Tx-Masking Input - Hardware Voltage Mode Selection Input (TPS61300, TPS61301) - DC Light Mode Selection Input (TPS61300, TPS61306) - Hardware Reset Input (TPS61301, TPS61305) - LED Temperature Monitoring (TPS61305) - Privacy Indicator LED Output - Integrated LED Safety Timer - Total Solution Size of Less Than 25 mm2 (< 1 mm height) - Available in a 20-Pin Nano Free™ (DSBGA) 2 Applications - Single, Dual, or Triple White LED Flashlight Supply for Cell Phones and Smart-Phones - LED Based Xenon Killer Flashlight - Audio Amplifier Power Supply 3 Description The TPS6130xx device is based on a high-frequency synchronous boost topology with constant current sinks to drive up to three white LEDs in parallel (400‑m A, 800-m A, and 400-m A maximum flash current). The extended high-current mode (HC_SEL) allows up to 1025-m A, 2050-m A, and 1025-m A flash current out of the storage capacitor. The high-capacity storage capacitor on the output of the boost regulator provides the high-peak flash LED current, thereby reducing the peak current demand from the battery to a minimum. The 2-MHz switching frequency allows the use of small and low profile 2.2-μH inductors. To optimize overall efficiency, the device operates with a 400-m V LED feedback voltage. The TPS6130xx device not only operates as a regulated current source, but also as a standard voltage boost regulator. The device keeps the output voltage regulated even when the input voltage exceeds the nominal output voltage. The device enters power-save mode operation at light load currents to maintain high...