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Digital DC/DC PMBus 17A Module
ZL9117M
The ZL9117M is a 17A, variable output, step-down
PMBus-compliant digital power supply. Included in the module
is a high-performance digital PWM controller, power MOSFETs,
an inductor, and all the passive components required for a
highly integrated DC/DC power solution. This power module
has built-in auto-compensation algorithms, which eliminates
the need for manual compensation design work. The ZL9117M
operates over a wide input voltage range and supports an
output voltage range of 0.6V to 3.6V, which can be set by
external resistors or via PMBus. This high-efficiency power
module is capable of delivering 17A. Only bulk input and
output capacitors are needed to finish the design. The output
voltage can be precisely regulated to as low as 0.6V with ±1%
output voltage regulation over line, load, and temperature
variations.
The ZL9117M features auto-compensation, internal soft-start,
auto-recovery overcurrent protection, an enable option, and
pre-biased output start-up capabilities.
The ZL9117M is packaged in a thermally enhanced, compact
(15mmx15mm) and low profile (3.5mm) over-molded QFN
package module suitable for automated assembly by standard
surface mount equipment. The ZL9117M is Pb-free and RoHS
compliant.
Figure 1 represents a typical implementation of the ZL9117M.
For PMBus operation, it is recommended to tie the Enable pin
(EN) to SGND.
Features
? Complete digital switch mode power supply
? Fast transient response
? Auto compensating PID filter
? External synchronization
? Output voltage tracking
? Current sharing
? Programmable soft-start delay and ramp
? Overcurrent/undercurrent protection
? PMBus compliant
Applications
? Server, telecom, and datacom
? Industrial and medical equipment
? General purpose point of load
Related Literature
? See AN2033 , “Zilker Labs PMBus Command Set for DDC
Products”
? See AN2034 , “Configuring Current Sharing on the ZL2004
and ZL2006”
V DRV
4.5V TO 6.5V
10μF
16V
4.7μF
16V
4.7μF
16V
10μF
16V
V IN
4.5V TO 13.2V
CIN
POWER GOOD OUTPUT
PG
VIN
ENABLE
EN
(EPAD)
V OUT
VOUT
EXT SYNC
SYNC
(EPAD)
DDC BUS
DDC
ZL9117M
SW
(EPAD)
COUT
SCL
I 2 C/SMBus
SDA
PGND
(EPAD)
RTN
SA
R SA
R SET
FIGURE 1. A COMPLETE DIGITAL SWITCH MODE POWER SUPPLY, ONLY BULK INPUT AND OUTPUT CAPACITORS ARE REQUIRED TO FINISH THE
DESIGN
July 22, 2013
FN7914.3
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2011-2013. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
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