ZL2004 Datasheet, PDF (1/42 Pages) Intersil Corporation – Adaptive Digital DC-DC Controller with Current Sharing

Data Sheet
February 18, 2009
ZL2004
FN6846.0
Adaptive Digital DC-DC Controller with Current Sharing
Description
The ZL2004 is a digital DC-DC controller designed to
work with the ZL1505 MOSFET driver IC. 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 across
the entire load range. Zilker Labs Digital-DC™
technology enables a blend of power conversion
performance and power management features.
The ZL2004 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 4.5 V input to a multi-phase supply operating
from a 12V input. The ZL2004 eliminates the need for
complicated power supply managers as well as
numerous external discrete components.
All operating features can be configured by simple pin-
strap/resistor selection or through the SMBus™ serial
interface. The ZL2004 uses the PMBus™ protocol for
communication with a host controller and the Digital-
DC bus for communication between other Zilker Labs
devices.
Features
Power Conversion
• Efficient synchronous buck controller
• Adaptive performance optimization algorithms
• 4.5 V to 14 V input range
• 0.54 V to 4 V output range (with margin)
• ± 1% V_OUT set-point accuracy
• Fast load transient response
• Current sharing and phase interleaving
• Digitally adjustable current sense range
• Snapshot™ parameter capture
• RoHS compliant (5 x 5 mm) QFN package
Power Management
• Digital soft start/stop
• Precision delay and ramp-up
• Power good/enable
• Voltage tracking, sequencing and margining
• Voltage/current/temperature monitoring
• SMBus communication (PMBus compliant)
• Output voltage and current protection
• Internal non-volatile memory (NVM)
Applications
• Servers / storage equipment
• Telecom / datacom equipment
• Power supplies (memory, DSP, ASIC, FPGA)
EN PG SS FC ILIM CFG
V25 VR VDD
V (0,1)
VMON
MGN
SYNC
DDC
SCL
SDA
SALRT
POWER
MANAGEMENT
NON-
VOLATILE
MEMORY
I² C
PWM
CONTROLLER
MONITOR
ADC
LDO
LEVEL
SHIFTER
CURRENT
SENSE
TEMP
SENSOR
PWMH
PWML
ISENA
ISENB
SA (0,1)
VTRK VSEN+/-
XTEMP
SGND DGND
Figure 1. Block Diagram
1
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