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| -SYSTEM PROGRAMMA | POWER SUPPLY | NCING/MONITORING | C I | ||||||||||||||||||||||||
| ispPAC Power Manager II Digital Power Management for Analog DC-DC Converters Designing with Power Manager II Lattice's ispPAC® Power Manager II family integrates intelligent power sequencing and precision fault monitoring with power supply voltage margining and trimming using digital closed loop technology - all in a single low-cost chip! The Power Manager II devices contain precision threshold comparators to monitor power supplies for faults, a 10-bit Analog-to-Digital (ADC) converter for measuring power supply voltages, Digital-to-Analog Converters (DAC) to control power supply output voltages, a CPLD to intelligently control power supply sequencing and generation of | |||||||||||||||||||||||||||
| Key Features and Benefits m The First Programmable Analog + Digital Solution! • No external analog or digital components required • Programmability and integration simplifies system development in multi-voltage board designs ■ Ruggedized CPLD with Up to 48-Macrocells for Sequencing and Supervisory Signal Logic • Large operating power supply range (3.3V + 20% to 3.3V- 15%) • High glitch immunity • Efficient logic implementation • Up to 20 outputs, 12 analog inputs, and 6 digital inputs ■ Optional Voltage Measurement with 10-bit ADC • 2mV resolution up to 2V, 6mV resolution up to 5.8V • Used for digital closed loop trimming ■ Up to 8 On-chip DACs for Margining and Trimming • Convenient supply trimming/margining control • Trimming includes Point of Load (POL) supplies Up to 12 Differential Voltage Sensors for Monitoring • Immune to noise on ground plane • Improved monitoring and measurement accuracy • Power supply voltage trimming to within 1% ■ Dual, Precision Programmable Comparator per Input • Reliable board operation and fast fault detection • Over-voltage, under-voltage and window flags ■ Up to 4 Programmable Delay Timers (32us to 2 Seconds) Provide Flexible Timing Control ■ Up to 4 High Voltage MOSFET Driver Outputs Provide Power Supply Ramp Rate Control ■ Optional I2C Bus Interface • Control power supply sequence • Measure voltage through ADC • Closed loop power supply control via DAC ■ Supports Power-Down Feature (10uA) ■ 32-Pin QFN, 48-Pin TQFP, 100-Pin TQFP Industrial Temperature ■ JTAG In-System Programmable with Non-Volatile E2CMOS® Configuration Storage | |||||||||||||||||||||||||||
| supervisory signals, programmable timers for controlling the speed of power supply turn on/off processes, charge pumped outputs for driving n-Channel MOSFETs, digital inputs for controlling and monitoring system-level signals, and an I2C interface. Power Manager II - A Superior Solution Digital Power Management for Any DC-DC Converter Through I2C ■ Precision DC-DC voltage control through digital closed loop trim or I2C ■ Margining through four programmable voltage profiles or I2C ■ Measure DC-DC voltage through I2C bus ■ Sequence control through I2C bus Hot Swap/Soft Start Controller ■ MOSFET operates in safe-operating region I | |||||||||||||||||||||||||||
| ■ Over-current / over-voltage shutdown with retry ■ Under-voltage lockout | |||||||||||||||||||||||||||
| Sequencing and Tracking of Supplies | |||||||||||||||||||||||||||
| Flexible control of each supply implemented in on-chip PLD Individual supply ramping with programmable charge pump Reliable operation under noisy supply conditions | |||||||||||||||||||||||||||
| ZW) 1*) | |||||||||||||||||||||||||||
| Simultaneous Precision Monitoring of Supplies for Faults | |||||||||||||||||||||||||||
| Over-voltage, under-voltage, window: two trip-point, high-precision comparators per input pin | NO)OVER VOLTAGE YES)SUPPLYOK BLUNDER VOLTAGE | ||||||||||||||||||||||||||
| Reliable monitoring through differential voltage sensing | |||||||||||||||||||||||||||