NXP Semiconductors VR249 Industrial Safety PMICs
NXP Semiconductors VR249 Industrial Safety PMICs are high-voltage power management devices for low-power microcontrollers in safety-critical industrial applications. The VR249 supports entry- and mid-range safety microcontrollers, including the MCX-E series, with multiple power supplies, system control, diagnostics, and low-power operation. The PMICs support energy storage, power delivery, gateways, factory automation, and other industrial safety applications requiring high grades of Industrial Safety Integrity Level (SIL) coverage up to SIL 2.
The NXP VR249 PMICs integrate a VPRE synchronous buck converter, a VCORE synchronous buck converter, a VBST asynchronous boost controller, two LDO regulators, a VREF high-precision reference voltage, and up to two tracking regulators. The devices also incorporate wake-up inputs, programmable GPIOs, a long-duration timer, voltage monitoring via an analog multiplexer, and device control through a 32-bit SPI interface with CRC. Functional safety support includes independent monitoring circuitry, watchdog functions, ABIST, LBIST, and safety outputs with latent fault detection mechanisms.
Features
- High-voltage industrial safety PMIC family for entry- and mid-range safety microcontrollers
- Single-chip solution with integrated pre-regulator and multiple MCU/peripheral rails
- Low-power LPOFF and Standby modes for power-conscious industrial designs
- SIL 2 industrial safety support with enhanced safety features and multiple fail-safe outputs
- Independent monitoring circuitry, watchdog functions, ABIST, and LBIST for safety-oriented designs
- Selectable wake-up sources from WAKE/GPIO pins, long-duration timer, or SPI activity
- Electromagnetic compatibility optimization with spread spectrum, slew-rate control, and manual frequency tuning
- OTP memory, OTP emulation mode, and debug mode for configuration, development, and evaluation
Applications
- Energy storage
- Power delivery
- Gateways
- Factory automation
- Battery management systems
- Robotic appliances
- EV supply equipment
- Motor drives
- Other factory networking equipment
- Programmable logic controller and remote I/O systems
Specifications
- Operating range
- 40V DC maximum input voltage
- Operating voltage support down to 3.2V with VBST in the front-end
- Operating voltage support down to 6V without VBST in the front-end
- LPOFF mode quiescent current of 30µA
- Standby mode quiescent current of 29µA with VPRE active
- Power supplies
- VPRE synchronous buck converter with integrated FETs and output current up to 1.5A
- VCORE synchronous buck converter with integrated FETs and output current up to 0.8A or 1.65A, depending on part
- VCORE output voltage setting range of 0.8V to 3.35V
- VBST asynchronous boost controller with external low-side switch, diode, and current sense resistor
- LDO1 selectable output voltage of 3.3V or 5.0V with current capability up to 400mA
- LDO2 selectable output voltage of 3.3V or 5.0V with current capability up to 400mA
- VREF high-precision reference voltage with 0.75% accuracy
- TRK1 and TRK2 voltage tracking regulators with current capability up to 150mA each
- System support
- Two high-voltage wake-up inputs
- Two programmable GPIOs with wake-up capability or high-side/low-side driver operation
- Programmable long-duration timer for system shutdown and wake-up control
- Analog multiplexer for system voltage monitoring
- 32-bit SPI interface with cyclic redundancy checks
- Functional safety
- Industrial safety level supports up to SIL 2
- Simple or challenger watchdog function
- ABIST1 and LBIST at startup
- On-demand ABIST2
- Safety outputs with a latent fault detection mechanism for RSTB, FS0B, and FS1B
- Package and configuration
- LQFP48 package with exposed pad
- Permanent device customization through OTP fuse memory
- OTP emulation mode for hardware development and evaluation
- Debug mode for software development, MCU programming, and debugging
- Temperature range of -40°C to +125°C
Associated Products
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