Product Summary

The SGM3142 is a high efficiency and cost effective charge pump white LED driver. It supports up to 6 white LEDs and regulates a constant current for uniform intensity. The part maintains the high efficiency by utilizing a 1×/1.5× fractional charge pump and low dropout current sources. The small equivalent 1× mode open loop resistance and ultra-low dropout voltage of current source extend the operating time of 1× mode and optimize the efficiency of Li-ion battery in white LED applications.

Parametrics

SGM3142 absolute maximum ratings: (1)VIN to GND: -0.3V to 6 V; (2)VOUT to GND: -0.3V to 6 V; (3)SHDN to GND: -0.3V to 6 V; (4)Storage Temperature Range: -65℃ to +150℃; (5)Junction Temperature: 160℃; (6)Operating Temperature Range: -40℃ to +85℃; (7)Power Dissipation, PD @ TA = 25℃, SOT23-6: 0.34W; (8)Package Thermal Resistance, SOT23-6, θJA: 250℃/W; (9)Lead Temperature Range (Soldering 10 sec): 260℃; (10)ESD Susceptibility, HBM: 2000V; MM: 400V.

Features

SGM3142 features: (1)Step-Up Voltage Converter; (2)Input Voltage Range: SGM3110-5.0: 2.7 to 5.0V; SGM3110-4.5: 2.7 to 4.5V; (3)MicroPower Consumption: 60μA; (4)Fixed 5V, 4.5V ± 4% Output; (5)Peak Current 250mA for 100ms; (6)High Frequency 750kHz Operation; (7)Logic-Controlled Shutdown; (8)Short-Circuit/Over-Temperature Protection; (9)Lead (Pb) Free SOT23-6 Package.

Diagrams

SGM3142 block diagram