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Intersil Electronic Components Datasheet

ZL9117M Datasheet

Digital DC/DC PMBus

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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”
VDRV
4.5V TO 6.5V
10µF
16V
4.7µF
16V
10µF
4.7µF 16V
16V
POWER GOOD OUTPUT
ENABLE
EXT SYNC
DDC BUS 2
I2C/SMBus 1
RSA
PG
EN
SYNC
DDC
SCL
SDA
SA
RSET
ZL9117M
VIN
(EPAD)
VOUT
(EPAD)
SW
(EPAD)
PGND
(EPAD)
VIN
4.5V TO 13.2V
2 x 22µF
16V
VOUT
3 x 100µF 3
6.3V
RTN
Notes:
1. The I2C/SMBus requires pull-up resistors. Please refer to the I2C/SMBus specifications for more details.
2. The DDC bus requires a pull-up resistor. The resistance will vary based on the capacitive loading of the bus (and on the number of
devices connected). The 10k default value, assuming a maximum of 100pF per device, provides the necessary 1µs pull-up rise time.
Please refer to the Digital-DC Bus section for more details.
3. Additional capacitance may be required to meet specific transient response targets.
4. The VR, V25, VDRV, and VDD capacitors should be placed no farther than 0.5 cm from the pin.
FIGURE 1. 17A APPLICATION CIRCUIT
October 21, 2011
FN7914.1
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 Inc. 2011. 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.
Free Datasheet http://www.datasheet4u.com/


Intersil Electronic Components Datasheet

ZL9117M Datasheet

Digital DC/DC PMBus

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Pin Configuration
ZL9117M
ZL9117M
(21 LD QFN)
TOP VIEW
PGND
V25
VDD
9
10
11
12
8 7 6 5 4 3 21
21
20
19
SDA
VSET
VTRK
FB+
VDRV
13
18 FB-
SW
14
VIN
15
PGND
16
VOUT
17
Pin Descriptions
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14 (epad)
15 (epad)
16 (epad)
17 (epad)
18
19
20
21
LABEL
SDA
SCL
SA
SYNC
PG
EN
DDC
VR
SGND
PGND
V25
VDD
VDRV
SW
VIN
PGND
VOUT
FB-
FB+
VTRK
VSET
TYPE
DESCRIPTION
I/O Serial data.
I/O Serial clock.
I Serial address select pin. Used to assign unique SMBus address to each module.
I/O Clock synchronization. Used for synchronization to external frequency reference.
O Power-good output.
I Enable input (factory setting active high). Pull up to enable PWM switching and pull down to disable PWM switching.
I/O Digital-DC bus (open drain). Interoperability between Zilker Labs modules.
PWR Internal 5V reference used to power internal drivers. Connect 4.7μF bypass capacitor to this pin.
PWR Signal ground. Connect to low impedance ground plane.
PWR Power ground. Connect to low impedance ground plane.
PWR Internal 2.5V reference used to power internal circuitry. Connect 4.7μF bypass capacitor to this pin.
PWR Input supply voltage for controller. Connect 4.7μF bypass capacitor to this pin.
PWR Power supply for internal FET drivers. Connect 10μF bypass capacitor to this pin.
PWR Drive train switch node
PWR Power supply input FET voltage.
PWR Power ground. Connect to low impedance ground plane.
PWR Power supply output voltage. Output voltage from PWM.
I Output voltage feedback. Connect to load return of ground regulation point.
I Output voltage feedback. Connect to output regulation point.
I Tracking sense input. Used to track an external voltage source.
I Output voltage selection pin. Used to set VOUT set point and VOUT max.
2 FN7914.1
October 21, 2011
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Part Number ZL9117M
Description Digital DC/DC PMBus
Maker Intersil
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