ISL8121 3V to 20V, Two-Phase Buck PWM Controller with Integrated 4A MOSFET Drivers

VIN (min) (V)	4.5
VIN (max) (V)	20
VOUT (min) (V)	0.6
VOUT (max) (V)	60% of VIN
IOUT (max) (A)	>60

The ISL8121 is a two-phase buck PWM controller featuring an input voltage range of 3V to 20V and integrated MOSFET drivers. Precision voltage regulation is provided for point-of-load and other high-current applications that require efficient and compact implementation. Multiphase buck converter architecture uses interleaved timing to multiply channel ripple frequency allowing smaller filter inductors and reducing input and output ripple currents due to the ripple cancellation effect. Lower ripple results in fewer input and output capacitors. Smaller and low cost transistors can be used resulting from the higher efficiency and reduced power dissipation.

The ISL8121 offers an internal 0.6V reference with a system regulation accuracy of ±0.8% (Industrial Temperature range), an optional external reference input, and user-adjustable switching frequency. Unity gain differential amplifier targeted at remote voltage sensing capability enhances the regulation. A power good signal (PGD) is issued when the output voltage is within the regulated window. An internal shunt regulator with optional external connection capability extends the operational input voltage range. For applications requiring voltage tracking or sequencing, the ISL8121 offers a host of possibilities, including coincidental, ratiometric, or offset tracking, as well as sequential startups, user adjustable for a wide range of applications.

Additional features include overvoltage and overcurrent protection. Overcurrent protection can be tailored to various applications with no need for additional parts. The ISL8121 uses cost and space-saving rDS(ON) sensing for channel current balance, dynamic voltage positioning, and overcurrent protection. Channel current balancing is automatic and accurate with the integrated currentbalance control system.

ISL8121 特点

Integrated Two-Phase Power Conversion
Precision Output Voltage Regulation
- ±0.8% System Accuracy Over-Temperature (Industrial)
- Differential Remote Voltage Sensing for Increased Voltage Sensing Accuracy
Shunt Regulator for Wide Input Power Conversion
- 5V and Higher Bias
- Up to 20V Power Down-Conversion
Precision Channel Current Sharing
- Loss-Less rDS(ON) Current Sampling
Integrated High Capable 4A Drivers
0.6V Internal Reference
Full Spectrum Voltage Tracking
- Coincidental, Ratiometric, or Offset
Sequential Start-up Control
Selectable Switching Frequency up to 2MHz Per Phase
Fast Transient Recovery Time
Overcurrent Protection
Overvoltage Protection
Capable of Start-up in a Pre-Biased Load
QFN Packages:
- QFN - Compliant to JEDEC PUB95 MO-220
- QFN - Quad Flat No Leads - Package Outline
- Near Chip Scale Package footprint, which improves PCB efficiency and has a thinner profile
Pb-Free Available (RoHS Compliant)

ISL8121 应用

General Purpose High Current DC/DC Converters
High Current, Low Voltage FPGA/ASIC DC/DC Converters
Telecom System

ISL8121 芯片订购指南

芯片型号	产品状态	温度范围	封装尺寸图	潮湿敏感度等级MSL	美元价格US $
ISL8121IRZ	量产	工业级	24 Ld QFN	3	3.11
ISL8121IRZ-T	量产	工业级	24 Ld QFN T+R	3	3.11
ISL8121EVAL1Z	Coming Soon		评估板	N/A	价格录入中