ZL8800 Datasheet, PDF (1/82 Pages) Intersil Corporation – Dual Channel/Dual Phase PMBus ChargeMode Control DC/DC Digital Controller

Dual Channel/Dual Phase PMBus™ ChargeMode
Control DC/DC Digital Controller
ZL8800
The ZL8800 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.
The ZL8800 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 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 thus saving cost and board space.
Intersil’s proprietary single wire DDC (Digital-DC) 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.
The ZL8800 features cycle by cycle output overcurrent
protection. The input voltage, output voltages and
DrMOS/MOSFET driver supply voltages are overvoltage and
overvoltage protected. Two external and one internal
temperature sensor are available for temperature monitoring,
one of which is used 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 Drop-Out (LDO) regulators allow the ZL8800 to
be operated from a single input supply eliminating the need
for additional linear regulators. The LDO output can be used to
power external drivers or DrMOS devices.
With full PMBus™ compliance the ZL8800 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
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.
• Switching frequency range 200kHz to 1.33MHz
• Proprietary single wire DDC (Digital-DC) 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
• 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
Applications
• Servers/storage equipment
• Telecom/datacom equipment
• Power supplies (memory, DSP, ASIC, FPGA)
October 10, 2013
1
FN7558.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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