| Regulated outputs (#) | 5 |
| Vin (Min) (V) | 4 |
| Vin (Max) (V) | 40 |
| Iout (Max) (A) | 3 |
| Rating | Automotive |
| LDO | 1 |
| Iq (Typ) (mA) | 0.044 |
| Features | Comm Control, Power Sequencing |
| Processor name | Generic |
| Processor supplier | Generic |
| Shutdown current (ISD) (Typ) (uA) | 44 |
| Switching frequency (Typ) (kHz) | 2450 |
| Configurability | Factory programmable |
- Qualified for Automotive Applications
- AEC-Q100 Test Guidance With the Following Results:
- Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
- Device HBM ESD Classification Level H1B
- Device CDM ESD Classification Level C4B
- Input Voltage Range: 4 V to 40 V, Transients up to 60 V; 80 V When Using External PMOS-FET
- Single-Output Synchronous-Buck Controller
- Peak Gate-Drive Current 0.6 A
- 490-kHz Fixed Switching Frequency
- Pseudo Random Frequency-Hopping Spread Spectrum or Triangular Mode
- Dual-Synchronous Buck Converter
- Designed for Output Currents up to 2 A
- Out of Phase Switching
- Switching Frequency: 2.45 MHz
- Adjustable 350-mA Linear Regulator
- Adjustable Asynchronous-Boost Converter
- 1-A Integrated Switch
- Switching Frequency: 2.45 MHz
- Soft-Start Feature for All Regulator Outputs
- Independent Voltage Monitoring
- Undervoltage (UV) Detection and Overvoltage (OV) Protection
- Short Circuit, Overcurrent, and Thermal Protection on all supply output rails
- Serial-Peripheral Interface (SPI) for Control and Diagnostic
- Integrated Window Watchdog (WD)
- Reference Voltage Output
- High-Side (HS) Driver for Use with External PMOS-FET for driving an LED
- Input for External Temperature Sensor for Shutdown at TA < –40°C
- Thermally Enhanced Packages With Exposed Thermal Pad
- 56-Pin VQFN (RVJ) or 56-Pin VQFNP (RWE)
The TPS65311-Q1 device is a power-management IC (PMIC), meeting the requirements of digital-signal-processor (DSP) controlled-automotive systems (for example, advanced driver-assistance systems). With the integration of commonly used supply rails and features, the TPS65311-Q1 device significantly reduces board space and system costs.
The device is capable of providing stable output voltages to the application, including a typical 5-V CAN-supply, from a varying input power supply (such as an automotive car battery) from 4 V to 40 V. The device includes one synchronous buck controller as a pre-regulator that offers flexible output power to the application. For post-regulation, the device includes two synchronous buck and one asynchronous boost converter, working at a switching frequency of 2.45 MHz to allow for a smaller inductor which requires less board space. The two buck converters also offer internal loop compensation which eliminates the need for external compensation components. Furthermore, the device includes a low-noise linear regulator.
To help support system safety, the device includes voltage monitoring on all supply rails and a window-watchdog to monitor the MCU and DSP. Other features include a high-side driver which drives a warning-lamp LED, a reference voltage which is used as ADC reference in the MCU, DSP, and a shutdown comparator which, in combination with external NTC-resistor, switches off the device at too-low ambient temperature.
