Description:The ISL78225 4-phase controller is targeted for applications where high efficiency (>95%) and high power are required. The multiphase boost converter architecture uses interleaved timing to multiply channel ripple frequency and reduce input and output ripple. Lower ripple results in fewer input/output capacitors and therefore lower component cost and smaller implementation area. The ISL78225 has a dedicated pin to initiate the phase dropping scheme for higher efficiency at light load by dropping phases base
10 X 10 MM, ROHS COMPLIANT, PLASTIC, MS-026ACB, TQFP-44
Pin Count:
44
Manufacturer Package Code:
Q44.10X10A
ECCN Code:
EAR99
HTS Code:
8542.39.00.60
Factory Lead Time:
18 Weeks
Manufacturer:
Renesas Electronics Corporation
YTEOL:
0
Analog IC - Other Type:
SWITCHING CONTROLLER
Control Mode:
CURRENT-MODE
Control Technique:
PULSE WIDTH MODULATION
Input Voltage-Max:
40 V
Input Voltage-Min:
5.6 V
Input Voltage-Nom:
12 V
JESD-30 Code:
S-PQFP-G44
Length:
10 mm
Moisture Sensitivity Level:
3
Number of Functions:
1
Number of Terminals:
44
Operating Temperature-Max:
125 °C
Operating Temperature-Min:
-40 °C
Output Voltage-Nom:
5 V
Package Body Material:
PLASTIC/EPOXY
Package Code:
HTQFP
Package Shape:
SQUARE
Package Style:
FLATPACK, HEAT SINK/SLUG, THIN PROFILE
Peak Reflow Temperature (Cel):
260
Seated Height-Max:
1.2 mm
Supply Current-Max (Isup):
12 mA
Surface Mount:
YES
Switcher Configuration:
BOOST
Switching Frequency-Max:
1000 kHz
Temperature Grade:
AUTOMOTIVE
Terminal Finish:
Pure Matte Tin (Sn) - annealed
Terminal Form:
GULL WING
Terminal Pitch:
0.8 mm
Terminal Position:
QUAD
Time@Peak Reflow Temperature-Max (s):
30
Width:
10 mm
ISL78225ANEZ-T Frequently Asked Questions (FAQs)
Renesas provides a recommended PCB layout guide in their application note AN1965, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure optimal performance.
The selection of input and output capacitors depends on the specific requirements of your application, including the input voltage range, output voltage, and ripple current. Renesas provides guidelines for capacitor selection in their application note AN1965, and also recommends using X5R or X7R ceramic capacitors with low ESR and high ripple current capability.
While the datasheet specifies an operating temperature range of -40°C to +125°C, Renesas recommends derating the device's performance at high temperatures to ensure reliable operation. For example, the output current may need to be reduced at high temperatures to prevent overheating.
The ISL78225ANEZ-T has built-in overcurrent protection and short-circuit protection, but additional external components may be required to customize the protection threshold and response time. Renesas provides guidelines for implementing overcurrent protection and short-circuit protection in their application note AN1965.
Renesas recommends a staggered startup sequence to prevent simultaneous inrush currents and reduce the overall system startup current. A delay of 1-2 ms between each device's startup is recommended to ensure reliable operation.
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ISL78225ANEZ-T Overview
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