Analog Devices Inc. ADP5140 Automotive Power Management IC (PMIC)
Analog Devices Inc. ADP5140 Automotive Power Management IC (PMIC) integrates four high-performance, synchronous, step-down buck regulators (BUCK1 to BUCK4), one boost regulator, and seven low noise, low dropout (LDO) regulators (LDO1 to LDO7). The buck regulators support input voltages from 2.7V to 5.5V and provide output currents from 2.5A to 3A. The boost regulator provides a fixed 5V output and a 400mA load current. The seven LDOs give a clean output voltage for the system. LDO5 provides an ultralow noise output that can be used to power noise-sensitive loads. ADP5140 runs in a fixed 2.2MHz switching frequency (fSW) or can synchronize to an external clock from its 1.9MHz to 2.4MHz synchronization range, outside the amplitude modulation (AM) band. The four buck regulators run at 90° out of phase to reduce the input ripple current and the input capacitor size, which lowers the system electromagnetic interference (EMI).
All regulators integrate internal compensation to simplify the design. The internal soft-start circuitry and power-up sequencing reduce the input inrush current. Each voltage rail is monitored internally, and any fault event is reported to the system through the RESET, FAULT, and STATUS pins. Two window watchdogs (WD0 and WD1) and one question-answer (QA) watchdog monitor the processor or other devices in the system to ensure that any software or hardware errors are detected. The ADP5140 integrates a serial peripheral interface (SPI) for system control and diagnostics.
Additional protection includes current limit, overvoltage, undervoltage protection, and thermal shutdown (TSD). The ADP5140 operates over a junction temperature range of -40°C to +150°C and is available in a 56-terminal, land grid array (LGA).
Features
- Buck regulators
- BUCK1 - 2.5A maximum continuous output current range with DVS
- BUCK2 - 2.5A maximum continuous output current range with adjustable output voltage
- BUCK3 - 3A maximum continuous output current range with adjustable output voltage
- BUCK4 - 3A maximum continuous output current range with low noise output
- Boost regulator with a fixed 5V output, 400mA output current range
- 7x LDO regulators with low noise output
- LDO1 - 300mA
- LDO2 - 2.3A
- LDO3 - 1.4A
- LDO4 - 1.2A
- LDO5 - 500mA
- LDO6 - 50mA
- LDO7 - 400mA
- 2.2MHz (typical) switching frequency
- Synchronization input or output
- Out of phase between buck regulators
- Integrated soft start and compensation for all regulators
- Overcurrent and thermal protection for all power rails
- 2x window voltage monitors
- 2x window watchdogs with pulse detection
- 1x QA watchdog
- Wake-up input
- SPI for control and diagnostics
- RESET, FAULT, and STATUS outputs
- -40°C to +150°C operating temperature range
- 56-terminal LGA package
- AEC-Q100 qualified for automotive applications
Applications
- Advanced Driver Assistance (ADAS)
- Automotive electronics
- Infotainment systems
- Industrial and instrumentation