L99LD02Q505TR STMicroelectronics

L99LD02 Automotive dual-phase boost DC/DC controller Datasheet - production data Programmable error amplifier gain Fully configurable in Limp Home Protection and diagnostic Boost functionality guaranteed in Cold Cranking Input overcurrent protection - programmable by SPI Thermal warning Features Thermal shutdown Overvoltage protection (OVP) AEC-Q100 qualified General Applications 32-bit ST SPI communication v 4.1 Stand-alone operation supported LED module applications. QFN32L 5x5 with exposed pad Timeout watchdog and Limp Home function Description Boost section The L99LD02 is a two-phase, constant frequency, Wide input range: 3V to 28V operation current mode boost controller able to drive N- Device supply option from boost output channel power MOSFETs. Adjustable boost output voltage - up to 80V Multi-phase operation is supported by SYNC I/O 10V Gate Driver supply for Standard-Level pin, providing the phase shifted clock signal. The MOSFETs boost controllers of more devices can be stacked, Internal 10V LDO regulator in order to operate in multi-phase for high power applications. Multi-phase operation reduces Fixed frequency architecture - system filtering capacitance and inductance programmable by SPI requirements. Dither oscillator parameters as frequency modulation and deviation percentage - The operating frequency is configurable via SPI programmable by SPI between 100kHz and 470kHz. Other features Peak current mode control with include an internal 10V LDO for the gate drivers, programmable Input Current Limitation soft-start, device supply option from boost output and pre-configurable operation in Limp Home. Constant voltage regulation Adjustable Slope Compensation Soft start Multi-phase operation - up to 4-phase supported SYNC I/O pin for multi-phase operation support Adjustable clock distribution and phase shift January 2020 DS12448 Rev 3 1/66 This is information on a product in full production. www.st.comContents L99LD02 Contents 1 Introduction 7 1.1 Typical application . 8 2 Supply concept 12 3 Boost controller 13 3.1 General description . 13 3.2 Switching frequency . 13 3.3 Output voltage . 13 3.4 Overvoltage protection 14 3.5 Output failure protection . 14 3.6 Soft start . 15 3.7 Stability Error Amplifier characteristics . 15 3.8 Operation in multiphase interleaved mode 16 4 Functional description 21 4.1 Operating modes . 21 4.1.1 Standby mode 23 4.1.2 Pre-standby mode . 24 4.1.3 Reset mode 24 4.1.4 Limp Home / Stand-alone mode 25 4.1.5 Active mode 25 4.2 Protections and diagnostic 26 4.2.1 Temperature warning . 26 4.2.2 Overcurrent 26 4.2.3 Over-temperature shutdown . 26 4.2.4 VS under voltage lockout 27 5 Serial peripheral interface (ST SPI standard) 28 5.1 Physical layer - Functional description . 28 5.2 Physical layer protocol . 29 5.2.1 SDI frame . 29 5.2.2 SDO Frame 30 2/66 DS12448 Rev 3