Intersil's ZL8800 is a dual-output or dual-phase digital DC/DC controller. Each output can operate independently, or can be used together in a dual-phase configuration for high-current applications. The ZL8800 supports a wide range of output voltages (0.54 V to 5.5 V) operating from input voltages as low as 4.5 V up to 14 V. With the fully-digital ChargeMode control, the ZL8800 will respond to a transient load step within a single-switching cycle. This unique compensation-free modulation technique allows designs to meet transient specifications with minimum-output capacitance, saving cost and board space. Intersil's proprietary single-wire digital-DC (DDC) serial-bus enables the ZL8800 to communicate between other Zilker ICs. By using the DDC, the ZL8800 achieves complex functions such as inter-IC phase current balancing, sequencing, and fault spreading, eliminating complicated power-supply managers with numerous external discrete components.
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- Unique compensation-free design; always stable
- Output voltage range: 0.54 V to 5.5 V
- Input voltage range: 4.5 V to 14 V
- 1% output voltage accuracy over line, load, and temperature
- ChargeMode control achieves fast transient response, reduced output capacitance, and provides output stability without compensation
- Switching frequency range 200 kHz to 1.33 MHz
- Proprietary single-wire DDC serial bus enables voltage sequencing and fault spreading with other Zilker ICs
- Tracking of an external power supply
- Cycle-by-cycle inductor peak current protection
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- Digital fault protection for output voltage UV/OV, input voltage UV/OV, temperature, and MOSFET driver voltage
- 10-bit average output current measurement with adjustable gain settings for sensing with high-current, low-DCR inductors
- 10-bit monitor ADC measures input voltage, input current, output voltage, internal, external temperature, driver voltage
- Configurable to use stand-alone MOSFET drivers or integrated driver-MOSFET (DrMOS) devices
- Non-volatile memory for storing operating parameters and fault events
- PMBus compliant
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| Applications |
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- Servers/storage equipment
- Telecom/datacom equipment
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- Power supplies (memory, DSP, ASIC, FPGA)
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