Description:The ISL6227 dual PWM controller delivers high efficiency precision voltage regulation from two synchronous buck DC/DC converters. It was designed especially to provide power regulation for DDR memory, chipsets, graphics and other system electronics in Notebook PCs. The ISL6227's wide input voltage range capability allows for voltage conversion directly from AC/DC adaptor or Li-Ion battery pack. Automatic mode transition of constant-frequency synchronous rectification at heavy load, and hysteretic (HYS) diod
ALSO OPERATES IN ADJUSTABLE MODE FROM 0.9V TO 5.5V
Analog IC - Other Type:
DUAL SWITCHING CONTROLLER
Control Mode:
CURRENT-MODE
Control Technique:
PULSE WIDTH MODULATION
Input Voltage-Max:
28 V
Input Voltage-Min:
5 V
Input Voltage-Nom:
16 V
JESD-30 Code:
S-PQCC-N28
JESD-609 Code:
e3
Length:
9.905 mm
Moisture Sensitivity Level:
3
Number of Functions:
1
Number of Terminals:
28
Operating Temperature-Max:
100 °C
Operating Temperature-Min:
-40 °C
Output Voltage-Max:
5.5 V
Output Voltage-Min:
0.9 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
Peak Reflow Temperature (Cel):
260
Seated Height-Max:
1.75 mm
Supply Current-Max (Isup):
3 mA
Surface Mount:
YES
Switcher Configuration:
PHASE-SHIFT
Switching Frequency-Max:
345 kHz
Temperature Grade:
INDUSTRIAL
Terminal Finish:
Matte Tin (Sn) - annealed
Terminal Form:
NO LEAD
Terminal Pitch:
0.64 mm
Terminal Position:
QUAD
Time@Peak Reflow Temperature-Max (s):
30
Width:
3.895 mm
ISL6227IRZ Frequently Asked Questions (FAQs)
The recommended layout for the ISL6227IRZ involves placing the input capacitors close to the VIN and EN pins, and the output capacitors close to the VOUT and GND pins. Additionally, the high-current paths should be kept short and wide to minimize resistance and inductance. A solid ground plane is also recommended to reduce noise and improve thermal performance.
The selection of input and output capacitors for the ISL6227IRZ depends on the specific application requirements. In general, low-ESR capacitors with high ripple current ratings are recommended. The input capacitor should be able to handle the input voltage and current, while the output capacitor should be able to handle the output voltage and current. The datasheet provides guidelines for capacitor selection, but additional analysis and simulation may be necessary to ensure optimal performance.
The maximum ambient temperature range for the ISL6227IRZ is -40°C to +85°C. However, the device can operate at higher temperatures with derating. The datasheet provides a thermal derating curve to help designers determine the maximum operating temperature for their specific application.
The ISL6227IRZ has a built-in overcurrent protection feature that can be enabled by connecting the OC pin to the VIN pin through a resistor. The value of the resistor determines the overcurrent threshold. The datasheet provides more information on how to implement overcurrent protection, including a calculation for the resistor value based on the desired overcurrent threshold.
Yes, the ISL6227IRZ can be used in a synchronous buck converter configuration. In this configuration, the device operates as a synchronous rectifier, reducing power losses and improving efficiency. The datasheet provides more information on how to implement a synchronous buck converter configuration using the ISL6227IRZ.
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ISL6227IRZ Overview
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