The ZL8802 is a dual output or dual phase digital DC/DC
controller. Each output can operate independently or be used
together in a dual phase configuration for high current
applications supporting 2-, 4-, 6- and 8-phase operation with
up to four ZL8802s.
The ZL8802 supports a wide range of output voltages
(0.54V to 5.5V) operating from input voltages as low as 4.5V
up to 14V.
With the fully digital ChargeMode control, the ZL8802 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, thus saving cost and board space.
Intersil’s proprietary single-wire DDC (Digital-DC™) serial bus
enables the ZL8802 to communicate between other Intersil
digital power ICs. By using the DDC, the ZL8802 achieves
complex functions such as inter-IC phase current balancing,
sequencing and fault spreading. This eliminates complicated
power supply managers with numerous external discrete
components.
The ZL8802 features fast output overcurrent protection. The
input voltage, output voltages and DrMOS/MOSFET driver
supply voltages are overvoltage and undervoltage protected.
Two external and one internal temperature sensors are
available for temperature monitoring, one of which can be
configured for under- and over-temperature protection. A
snapshot parametric capture feature allows users to take a
snapshot of operating and fault data during normal or fault
conditions.
Integrated Low Dropout (LDO) regulators allow the ZL8802 to
operate from a single input supply eliminating the need for
additional linear regulators. The VDRV LDO output can be used
to power external drivers or DrMOS devices.
With full PMBus™ compliance, the ZL8802 is capable of
measuring and reporting input voltage, input current, output
voltage, output current as well as the device’s internal
temperature, 2 external temperatures and an auxiliary voltage
or temperature input.

Features
• Unique compensation-free design – always stable
• Output voltage range: 0.54V to 5.5V
• Input voltage range: 4.5V to 14V
• 1% output voltage accuracy over line, load and temperature
• ChargeMode control achieves fast transient response,
reduced output capacitance and provides output stability
without compensation.
• 2-channel output, 2-, 4-, 6- or 8-phase output with 2, 3 or 4
devices
• Switching frequency range 200kHz to 1.33MHz
• Proprietary single-wire DDC (Digital-DC) serial bus enables
voltage sequencing and fault spreading with other Intersil
digital power ICs
• Inductor peak and averaged over and undercurrent
protection
• Digital fault protection for output voltage UV/OV, input
voltage UV/OV, temperature and MOSFET driver voltage
• Accurate average output current measurement with
adjustable gain settings for sensing with SPS current
monitor outputs or high current, low DCR inductors
• Monitor ADC measures input voltage, input current, output
voltage, driver voltage, internal and external temperature
• Nonvolatile memory for storing operating parameters and
fault events
• PMBus™ compliant

Applications
• Servers/storage equipment
• Telecom/datacom equipment
• Power supplies (memory, DSP, ASIC, FPGA)