The LM3533 is a complete power source for backlight, keypad, and indicator LEDs in smartphone handsets. It features a high-voltage inductive boost converter to power two series LED strings (up to 40V) and an integrated charge pump to bias five low-voltage indicator LED current sinks. The device includes an ambient light sensor (ALS) interface with an internal 8-bit ADC and a PWM control input for content adjustable backlight control (CABC). It supports 14-bit equivalent exponential dimming and is fully programmable via an I2C-compatible interface.
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| Number of Channels | 7Channels |
| Input Voltage (Min) | 2.7V |
| Input Voltage (Max) | 5.5V |
| Output Voltage (Max) | 40V |
| LED Current per Channel | 30mA |
| Switching Frequency (Max) | 1000kHz |
| Peak Efficiency | 88% |
| Topology | Boost |
| Operating Temperature Range | -40 to 125°C |
| RoHS | Compliant |
| REACH | Affected |
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