MAXIM Integrated Products has released the MAX1583 step up dc-dc converter that drives up to five white LEDs in series with a high constant current to provide camera flash/strobe power in cell phones, PDAs, and other handheld devices. It is available from Arrow Electronics .
The MAX1583 integrates a 1MHz, 24V, step up dc-dc converter and a high-voltage, low-dropout (LDO) current regulator. It operates from input voltages of 2.6V to 5.5V. Two logic inputs control four modes of operation, shutdown mode (0.5μA max), movie mode (programmable up to 100mA), precharge mode, and strobe mode. The MAX1583 also features overvoltage and thermal shutdown protection.
The MAX1583 is available in a 3mm x 3mm, 10-pin TDFN package screened for the extended temperature range from -40°C to 85°C. It is available with three preset input-current limits, MAX1583X (1A), MAX1583Y (500mA), and MAX1583Z (250mA).