The SMB112 is a highly integrated and flexible five-channel power manager designed for powering TFT/LCD display panels and for driving low- and high-power white-LEDs. The built-in digital programmability allows system designers to custom tailor the device to suit almost any multi-channel power management application.
This preliminary datasheet from Summit Microelectronics introduces the SMB112, a five-channel power manager intended for powering TFT/LCD display panels and for driving low- and high-power white LEDs. The device combines one synchronous step-down (buck) channel, two step-up (boost) channels, one inverting (buck-boost) channel and one fixed +3.3V LDO, and operates from a +2.7V to +6.0V input.
All major parameters are digitally programmable through an I2C interface and stored in non-volatile memory, including output voltage set-point, individual dimming, power-up/down sequencing, soft-start and output slew rate, and UV/OV monitoring of all outputs. The document lists the device features, application areas such as white LED backlighting and portable displays, and a simplified applications drawing. The SMB112 is supplied in a lead-free, Green, RoHS compliant 32-pad QFN-32 package.
| Input voltage range | +2.7V to +6.0V |
|---|---|
| Output channels | Five (one buck, two boost, one inverting, one LDO) |
| Reference and output voltage accuracy | <0.5% |
| LDO output | +3.3V @ 20mA |
| Operating frequency | 800 kHz |
| User nonvolatile memory | 96 bytes |
| Communication interface | I2C bus |
| Operating temperature range | 0C to +70C |
| Package | 32-pad QFN-32, lead-free, Green, RoHS compliant |
It is a five-channel power manager designed for powering TFT/LCD display panels and for driving low- and high-power white LEDs.
It operates from a +2.7V to +6.0V input, making it suited to battery-powered applications.
Communication is via the industry standard I2C bus, and user-programmed settings are stored in non-volatile EEPROM.
It is available in a lead-free, Green, RoHS compliant 32-pad QFN-32 package.