ZL2008 Datasheet, PDF (1/47 Pages) Intersil Corporation – Digital DC-DC Controller with Drivers and Pin-Strap Current Sharing

Data Sheet
February 19, 2009
ZL2008
FN6859.0
Digital DC-DC Controller with Drivers and Pin-Strap Current Sharing
Description
The ZL2008 is a digital DC-DC controller with
integrated MOSFET drivers. Current sharing allows
multiple devices to be connected in parallel to source
loads with very high current demands. Adaptive
performance optimization algorithms improve power
conversion efficiency. Zilker Labs Digital-DC™
technology enables a blend of power conversion
performance and power management features.
The ZL2008 is designed to be a flexible building block
for DC power and can be easily adapted to designs
ranging from a single-phase power supply operating
from a 3.3 V input to a multi-phase supply operating
from a 12 V input. The ZL2008 eliminates the need for
complicated power supply managers as well as
numerous external discrete components.
Key operating features can be configured by pin-straps,
including compensation, current sharing and output
voltage. The ZL2008 uses the I²C/SMBus™ with
PMBus™ protocol for communication with a host
controller and the Digital-DC bus for communication
between Zilker Labs devices.
Features
Power Conversion
ƒ Efficient synchronous buck controller
ƒ Adaptive light load efficiency optimization
ƒ 3 V to 14 V input range
ƒ 0.54 V to 5.5 V output range (with margin)
ƒ POLA and DOSA voltage trim modes
ƒ ±1% output voltage accuracy
ƒ Internal 3 A MOSFET drivers
ƒ Fast load transient response
ƒ Current sharing and phase interleaving
ƒ Snapshot™ parameter capture
ƒ RoHS compliant (6 x 6 mm) QFN package
Power Management
ƒ Digital soft start / stop
ƒ Precision delay and ramp-up
ƒ Power good / enable
ƒ Voltage tracking, sequencing and margining
ƒ Voltage, current and temperature monitoring
ƒ I²C/SMBus interface, PMBus compatible
ƒ Output voltage and current protection
ƒ Internal non-volatile memory (NVM)
Applications
ƒ Servers / storage equipment
ƒ Telecom / datacom equipment
ƒ Power supply modules
EN PG PH_EN FC ILIM CFG UVLO V25 VR VDD
V
SS
VTRK
MGN
SYNC
DDC
SCL
SDA
SALRT
POWER
MANAGEMENT
NON-
VOLATILE
MEMORY
PWM
CONTROLLER
I² C
MONITOR
ADC
LDO
DRIVER
CURRENT
SENSE
TEMP
SENSOR
BST
GH
SW
GL
VSEN+
VSEN-
ISENA
ISENB
SA
XTEMP
PGND SGND DGND
Figure 1. Block Diagram
Figure 2. Efficiency vs. Load Current
1
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