The ISL8117A is a synchronous buck controller to generate
POL voltage rails and bias voltage rails for a wide variety of
applications in industrial and general purpose segments. Its
wide input and output voltage ranges make it suitable for
telecommunication and after-market automotive applications.
ISL8117A is a derivative from the ISL8117 by replacing its
CLKOUT pin with COMP pin to provide flexibility to customers to
configure the voltage loop compensation externally.
The ISL8117A uses the valley current modulation technique to
bring a hassle-free power supply design with minimal number
of components and complete protection from unwanted
events.
The ISL8117A offers programmable soft-start and enable
functions along with a power-good indicator for ease of supply
rail sequencing and other housekeeping requirements. In ideal
situations, a complete power supply circuit can be designed
with 10 external components and provide OV/OC/OT
protections in a space conscious 16 Ld 4mmx4mm QFN
package. The package uses an EPAD to improve thermal
dissipation and noise immunity. Low pin count, less number of
external components and default internal values, makes the
ISL8117A an ideal solution for quick to market simple power
supply designs. The ISL8117A utilizes single resistor settings
for other functions such as operating frequency and
overcurrent protection. Its current mode control with VIN
feed-forward enables it to cover various applications. The
unique DEM/Skipping mode at light load dramatically lowers
standby power consumption with consistent output ripple over
different load levels.

Features
• Wide input voltage range: 4.5V to 60V
• Wide output voltage range: 0.6V to 54V
• Light-load efficiency enhancement
- Low ripple diode emulation mode with pulse skipping
• Programmable soft-start
• Supports prebiased output with SR soft-start
• Programmable frequency: 100kHz to 2MHz
• External sync
• PGOOD indicator
• Forced PWM
• Adaptive shoot-through protection
• No external current sense resistor
- Use lower MOSFET rDS(ON)
• Functional pins with default design values
- EN, RT, SS/TRK, MOD/SYNC, LGATE/OCS
• Complete protection
- Overcurrent, overvoltage, over-temperature, undervoltage
• Pb-free (RoHS compliant)

Applications
• PLC and factory automation
• Industrial equipments
• Security surveillance
• Server and data centers
• Switcher and routers
• Telecom and datacom
• LED panels