CAT3604V LED Driver, 4-Channel Description The CAT3604V is a high efficiency fractional charge pump that can drive up to four LEDs with input supply voltages as low as 2.5 V. An external RSET resistor is used to control the LED channel brightness while channel diagnostics include automatic detection for CAT3604V 1 F 1 F C1+ C1 C2+ C2 V V IN OUT 2.4 V VIN VOUT C C to IN OUT 5.5 V 1 F CAT3604V 1 F LED1 ON OFF EN LED2 20 mA LED3 RSET LED4 GND 4.02 k Figure 1. Typical Application Circuit Table 1. ABSOLUTE MAXIMUM RATINGS Parameter Rating Unit VIN, LEDx, C1, C2 voltage 6 V VOUT voltage 7 V EN voltage 6 V Storage Temperature Range 65 to +160 C Junction Temperature Range 40 to +150 C Lead Temperature 300 C Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. Table 2. RECOMMENDED OPERATING CONDITIONS Parameter Rating Unit VIN 2.5 to 5.5 V Ambient Temperature Range 40 to +85 C I per LED pin 0 to 25 mA LED Total Output Current 0 to 100 mA LED Forward Voltage Range 1.3 to 4.3 V Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. NOTE: Typical application circuit with external components is shown above.