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ZL9101M Datasheet

Digital DC/DC PMBus 12A Module

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Digital DC/DC PMBus 12A Module
ZL9101M
The ZL9101M is a 12A 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
complete DC/DC power solution. The ZL9101M operates over
a wide input voltage range and supports an output voltage
range of 0.6V to 4V, which can be set by external resistors or
via PMBus. This high efficiency power module is capable of
delivering 12A. 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 ZL9101M features internal compensation, internal
soft-start, auto-recovery overcurrent protection, an enable
option, and pre-biased output start-up capabilities.
The ZL9101M 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 ZL9101M is Pb-free and RoHS
compliant.
Features
• Complete Digital Switch Mode Power Supply
• Fast Transient Response
• 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 - 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
PG
EN
SYNC
DDC
SCL
SDA
SA
ZL9101M
VIN
(EPAD)
VOUT
(EPAD)
SW
(EPAD)
PGND
(EPAD)
VIN
4.5V TO 13.2V
2 x 22µF
16V
VOUT
3 x 47µF 3
16V
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 further than 0.5 cm from the pin.
FIGURE 1. 12A APPLICATION CIRCUIT
NOTE: Figure 1 represents a typical implementation of the ZL9101M. For PMBus operation, it is recommended to tie the enable pin (EN) to SGND.
April 8, 2011
FN7669.2
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2010, 2011. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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Intersil Electronic Components Datasheet

ZL9101M Datasheet

Digital DC/DC PMBus 12A Module

No Preview Available !

Pin Configuration
ZL9101M
ZL9101M
(21 LD QFN)
TOP VIEW
PGND
V25
VDD
9
10
11
12
VDRV
13
VIN
15
8 7 6 5 4 3 21
21
20
19
SDA
VSET
VTRK
FB+
14
SW
PGND
16
18 FB-
VOUT
17
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.
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.
PWR Input supply voltage for controller.
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 FN7669.2
April 8, 2011
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Part Number ZL9101M
Description Digital DC/DC PMBus 12A Module
Maker Intersil
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