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Número de pieza ZL2008
Descripción Digital DC-DC Controller
Fabricantes Intersil Corporation 
Logotipo Intersil Corporation Logotipo



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Data Sheet
ZL2008
www.DataSheet4U.com
February 19, 2009
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
I2 C
PWM
CONTROLLER
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 1-888-INTERSIL or 1-888-468-3774|Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2009. All Rights Reserved
All other trademarks mentioned are the property of their respective owners

1 page




ZL2008 pdf
ZL2008
Table 3. Electrical Specifications
VDD = 12 V, TA = -40°C to 85°C unless otherwise noted. Typical values are at TA = 25°C.
www.DataSheet4U.com
Parameter
Conditions
Min Typ Max Unit
Input and Supply Characteristics
IDD supply current at fSW = 200 kHz
IDD supply current at fSW = 1.4 MHz
IDDS shutdown current
VR reference output voltage
V25 reference output voltage
GH, GL no load;
MISC_CONFIG[7] = 1
EN = 0 V
No I2C/SMBus activity
VDD > 6 V, IVR < 50 mA
VR > 3 V, IV25 < 50 mA
16 30 mA
25 50 mA
6.5 8 mA
4.5 5.2 5.5
2.25 2.5 2.75
V
V
Output Characteristics
Output voltage adjustment range1
Output voltage set-point resolution
Output voltage accuracy3
VSEN input bias current
Current sense differential input
voltage (ground referenced)
Current sense differential input
voltage (VOUT referenced,
VOUT < 4.0 V)
Current sense input bias current
Current sense input bias current
(VOUT referenced, VOUT < 4.0 V)
Soft start delay duration range4
VIN > VOUT
Set using resistors
Set using I2C/SMBus
Includes line, load, temp
VSEN = 5.5 V
VISENA - VISENB
VISENA - VISENB
Ground referenced
ISENA
ISENB
Set using SS pin or resistor
Set using I2C/SMBus
0.6
-1
- 100
10
±0.025
110
- 50
- 100
-1
- 100
2
0.002
5.0
1
200
100
50
100
1
100
30
500
V
mV
% FS2
%
µA
mV
mV
µA
µA
µA
ms
s
Soft start delay duration accuracy
Turn-on delay (precise mode) 4,5
Turn-on delay (normal mode) 6
Turn-off delay 6
±0.25
-0.25/+4
-0.25/+4
ms
ms
ms
Soft start ramp duration range
Set using SS pin or resistor
Set using I2C
2 20 ms
0 200 ms
Soft start ramp duration accuracy
100
µs
Notes:
1. Does not include margin limits.
2. Percentage of Full Scale (FS) with temperature compensation applied.
3. VOUT measured at the termination of the VSEN+ and VSEN- sense points.
4. The device requires a delay period following an enable signal and prior to ramping its output. Precise timing mode limits this
delay period to approx 2 ms, where in normal mode it may vary up to 4 ms.
5. Precise ramp timing mode is only valid when using EN pin to enable the device rather than PMBus enable.
6. The devices may require up to a 4 ms delay following the assertion of the enable signal (normal mode) or following the de-
assertion of the enable signal.
5 Data Sheet Revision 2/19/2009
www.intersil.com

5 Page





ZL2008 arduino
4. ZL2008 Overview
ZL2008
www.DataSheet4U.com
4.1 Digital-DC Architecture
The ZL2008 is an innovative mixed-signal power
conversion and power management IC based on Zilker
Labs patented Digital-DC technology that provides an
integrated, high performance step-down converter for a
wide variety of power supply applications.
Today’s embedded power systems are typically
designed for optimal efficiency at maximum load,
reducing the peak thermal stress by limiting the total
thermal dissipation inside the system. Unfortunately,
many of these systems are often operated at load levels
far below the peak where the power system has been
optimized, resulting in reduced efficiency. While this
may not cause thermal stress to occur, it does
contribute to higher electricity usage and results in
higher overall system operating costs.
Zilker Labs’ efficiency-adaptive ZL2008 DC-DC
controller helps mitigate this scenario by enabling the
power converter to automatically change their
operating state to increase efficiency and overall
performance with little or no user interaction needed.
Its unique PWM loop utilizes an ideal mix of analog
and digital blocks to enable precise control of the entire
power conversion process with no software required,
resulting in a very flexible device that is also very easy
to use. An extensive set of power management
functions are fully integrated and can be configured
using simple pin connections. The user configuration
can be saved in an internal non-volatile memory
(NVM). Additionally, all functions can be configured
and monitored via the SMBus hardware interface using
standard PMBus commands, allowing ultimate
flexibility.
Once enabled, the ZL2008 is immediately ready to
regulate power and perform power management tasks
with no programming required. Advanced
configuration options and real-time configuration
changes are available via the I2C/SMBus interface if
desired and continuous monitoring of multiple
operating parameters is possible with minimal
interaction from a host controller. Integrated sub-
regulation circuitry enables single supply operation
from any supply between 3 V and 14 V with no
secondary bias supplies needed.
The ZL2008 can be configured by simply connecting
its pins according to the tables provided in the
following sections. Additionally, a comprehensive set
of online tools and application notes are available to
help simplify the design process. An evaluation board
is also available to help the user become familiar with
the device. This board can be evaluated as a standalone
platform using pin configuration settings. A
Windows™-based GUI is also provided to enable full
configuration and monitoring capability via the
I2C/SMBus interface using an available computer and
the included USB cable.
Application notes and reference designs are available
to assist the user in designing to specific application
demands. Please register for My ZL on
www.zilkerlabs.com to access the most up-to-date
documentation or call your local Zilker Labs sales
office to order an evaluation kit.
11 Data Sheet Revision 2/19/2009
www.intersil.com

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