ZL2105ALNF Intersil, ZL2105ALNF Datasheet - Page 27

• Manufacturer Part Number: ZL2105ALNF
• Description: IC DGTL DC-DC CTRLR 3A 36QFN
• Manufacturer: Intersil
• Type: Step-Down (Buck), PWM - Voltage Moder

Specifications of ZL2105ALNF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.6 V ~ 5.5 V
• Current - Output: 3A
• Frequency - Switching: 200kHz ~ 2MHz
• Voltage - Input: 4.5 V ~ 14 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: *
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4. Continue operating through the fault (this could
5. Initiate an immediate shutdown.
If the user has configured the device to restart, the
device will wait the preset delay period (if so chosen)
and will then check the device temperature. If the
temperature has dropped below a threshold that is
approx 15°C lower than the selected temperature fault
limit, the device will attempt to re-start. If the
temperature still exceeds the fault limit the device will
wait the preset delay period and retry again.
The default response from a temperature fault is an
immediate shutdown of the device. The device will
continuously check for the fault condition, and once
the fault has cleared the ZL2105 will be re-enabled.
Please refer to Application Note AN2013 for details on
how to select specific over-temperature fault response
options via I
6.7 Voltage Tracking
Numerous high performance systems place stringent
demands on the order in which the power supply
voltages are turned on. This is particularly true when
powering FPGAs, ASICs, and other advanced
processor devices that require multiple supply voltages
to power a single die. In most cases, the I/O interface
operates at a higher voltage than the core and therefore
the core supply voltage must not exceed the I/O supply
voltage according to the manufacturers' specifications.
Voltage tracking protects these sensitive ICs by
limiting the differential voltage between multiple
power supplies during the power-up and power down
sequence. The ZL2105 integrates a lossless tracking
scheme that allows its output to track a voltage that is
applied to the VTRK pin with no external components
required. The VTRK pin is an analog input that, when
tracking mode is enabled, configures the voltage
applied to the VTRK pin to act as a reference for the
device’s output regulation.
result in permanent damage to the power supply).
2
C/SMBus.
27
ZL2105
V
V
V
TRK
OUT
OUT
Figure 18. Tracking Modes
ZL2105
V
Ratiometric
Coincident
IN
SW
V
OUT
March 30, 2011
V
V
V
V
TRK
OUT
TRK
OUT
Time
Time
FN6851.2