DATASHEET
Dual Channel/Dual Phase PMBus™ ChargeMode™
Control DC/DC Digital Controller
ZL8800
Features
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.
• 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
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.
• ChargeMode control achieves fast transient response,
reduced output capacitance and provides output stability
without compensation.
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.
• Switching frequency range 200kHz to 1.33MHz
• Proprietary single wire DDC (Digital-DC) serial bus enables
voltage sequencing and fault spreading with other Intersil
ICs
• Tracking of an external power supply
Intersil’s proprietary single wire DDC (Digital-DC™) serial bus
enables the ZL8800 to communicate between other Intersil
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.
• 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
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.
• 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
• Nonvolatile memory for storing operating parameters and
fault events.
• PMBus™ compliant
Integrated Low Dropout (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.
Applications
• Servers/storage equipment
• Telecom/datacom equipment
• Power supplies (memory, DSP, ASIC, FPGA)
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.
Related Literature
• AN1877, “ZL8800-2CH-DEMO1Z Demonstration Board User
Guide”
• AN1900, “USB to PMBus™ Adapter User Guide”
• AN1901, “ZL8800-2PH-DEMO1Z Demonstration Board”
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
PART NUMBER
ZL8800
DUAL OUTPUT
DUAL PHASE
DDC CURRENT SHARE
SPS SUPPORT
Yes
No
Yes
Yes
Yes
No
Yes
Yes
No
No
ZL8801
ZL8802
Yes
Yes
September 14, 2015
FN7558.3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2013, 2015. All Rights Reserved
Intersil (and design), Digital-DC and ChargeMode are trademarks owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
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