Description:ISL88550A integrates a synchronous buck PWM controller to generate VDDQ, a sourcing and sinking LDO linear regulator to generate VTT, and a 10mA reference output buffer to generate VTTR. The buck controller drives two external N-Channel MOSFETs to generate output voltages down to 0. 7V from a 2V to 25V input with output currents up to 15A. The LDO can source up to 2. 5A and sink up to -2. 0A continuously. Both the LDO output and the 10mA reference buffer output can be made to track the REFIN voltage via a b
ALSO WORKS IN PFM MODE; OUTPUT VOLTAGE FROM 0.7 TO 3.5 V
Analog IC - Other Type:
SWITCHING CONTROLLER
Control Mode:
CURRENT MODE
Control Technique:
PULSE WIDTH MODULATION
Input Voltage-Max:
25 V
Input Voltage-Min:
2 V
Input Voltage-Nom:
15 V
JESD-30 Code:
S-PQCC-N28
JESD-609 Code:
e3
Length:
5 mm
Moisture Sensitivity Level:
3
Number of Functions:
1
Number of Terminals:
28
Operating Temperature-Max:
85 °C
Operating Temperature-Min:
-40 °C
Output Voltage-Nom:
2.5 V
Package Body Material:
PLASTIC/EPOXY
Package Code:
HVQCCN
Package Equivalence Code:
LCC28,.2SQ,20
Package Shape:
SQUARE
Package Style:
CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Packing Method:
TR, 7 INCH
Peak Reflow Temperature (Cel):
260
Seated Height-Max:
0.85 mm
Supply Current-Max (Isup):
1 mA
Surface Mount:
YES
Switcher Configuration:
BUCK-BOOST
Switching Frequency-Max:
600 kHz
Temperature Grade:
INDUSTRIAL
Terminal Finish:
Matte Tin (Sn) - annealed
Terminal Form:
NO LEAD
Terminal Pitch:
0.5 mm
Terminal Position:
QUAD
Time@Peak Reflow Temperature-Max (s):
30
Width:
5 mm
ISL88550AIRZ-T7 Frequently Asked Questions (FAQs)
Renesas provides a recommended PCB layout in the ISL88550 evaluation board user manual, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure reliable operation.
The compensation network can be optimized using the ISL88550's built-in compensation pin and following the guidelines in the datasheet. Additionally, Renesas provides a compensation calculator tool to help designers optimize the compensation network for their specific application.
Although the datasheet specifies a maximum input voltage of 24V, the ISL88550 can handle input voltages up to 28V for short durations (e.g., during startup or fault conditions). However, continuous operation above 24V is not recommended.
To ensure reliable startup and shutdown, it's essential to follow the recommended startup and shutdown sequences outlined in the datasheet. Additionally, designers should ensure that the input voltage rises and falls monotonically, and that the enable pin is properly driven during startup and shutdown.
Renesas provides guidelines for EMI filter design in the ISL88550 datasheet and application notes. A common approach is to use a pi-filter (L-C-L) configuration with a common-mode choke and X-capacitors to minimize electromagnetic interference.
Trust Checks
This model has been built in collaboration with the manufacturer.
Manufacturer Collaborated
This model has been verified by system checks.
System Verified
This model has been reviewed by community users.
Community Approved
Sponsored
ISL88550AIRZ-T7 Overview
Use the download button to access the ISL88550AIRZ-T7 schematic symbol, PCB footprint, and 3D model.
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