ISL8120
ISL8120 is Dual/n-Phase Buck PWM Controller manufactured by Renesas.
feature protects any channel from overloading/stressing due to system faults or phase failure. The undervoltage fault protection features are also designed to prevent a negative transient on the output voltage during falling down. This eliminates the Schottky diode that is used in some systems for protecting the load device from reversed output voltage damage.
Related Literature
- Technical Brief TB389 “PCB Land Pattern Design and Surface Mount Guidelines for QFN (MLFP) Packages”
- AN1528, “ISL8120EVAL3Z Evaluation Board Setup Procedure”
- AN1607, “ISL8120EVAL4Z Evaluation Board Setup Procedure”
Features
- Wide VIN range operation: 3V to 22V
- VCC operation from 3V to 5.60V
- Excellent output voltage regulation: 0.6V ±0.6%/±0.9% internal reference over mercial/industrial temperature
- Frequency synchronization
- Programmable phase shift for 1-, 2-, 3-, 4-, 6-, up to
12-phase applications
- Fault hand shake capability for high system reliability
- Digital soft-start with precharged output start-up capability
- Dual independent channel enable inputs with precision voltage monitor and voltage feed-forward capability
- Programmable input voltage POR and its hysteresis with a resistor divider at EN input
- Extensive circuit protection functions: output overvoltage, undervoltage, overcurrent protection, over temperature and pre-power-on reset overvoltage protection option
Applications
- Power supply for data/tele and POL
- Paralleling power module
- Wide and narrow input voltage range buck regulators
- DDR I and II applications
- High current density power supplies
- Multiple outputs VRM and VRD
CHANNELS 1 AND 2 GATE DRIVE
PVCC 3Ω
PWMn FAULT LOGIC
GATE CONTROL
LOGIC
SHOOTTHROUGH PROTECTION
BOOTn UGATEn 10kΩ PHASEn 10kΩ LGATEn
FIGURE 1. INTEGRATED DRIVER BLOCK DIAGRAM
FN6641 Rev.3.00 July 20, 2016
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