Intersil ISL9111EH50Z-T7A

Description
The ISL9111 and ISL9111A are synchronous boost converters designed for single-cell, dual-cell, or three-cell alkaline, NiCd, or NiMH battery-powered applications. With a typical start-up voltage of 0.8V, these devices can supply up to 5.25V output voltage. They are guaranteed to provide 100mA from a single-cell input and 240mA from a dual-cell input when the output is 3.3V. The high 1.2MHz switching frequency allows for the use of small inductors and ceramic capacitors, minimizing the solution size.
The ISL9111 and ISL9111A are internally compensated and fully integrated, optimizing efficiency with minimal external components. At light load, they enter skip mode, consuming only 20μA of quiescent current, resulting in higher efficiency at light loads and maximum battery life.
The ISL9111 and ISL9111A address both rechargeable and non-rechargeable battery applications. The ISL9111 has an undervoltage lockout (UVLO) feature that internally shuts off at 0.7V, protecting rechargeable batteries. The ISL9111A has this feature disabled to maximize the usable life of non-rechargeable single-cell batteries.

Features
Up to 97% efficiency at typical operating conditions
Minimum start-up voltage:
0.8V (ISL9111)
0.6V (ISL9111A)
Minimum operating voltage:
-0.7V (ISL9111)
-0.5V (ISL9111A)
Low quiescent current: 20μA (typical)
Output current:
100mA at 3.3V output from a single-cell input (VIN = 0.9V)
240mA at 3.3V output from a dual-cell input (VIN = 1.8V)
Logic control shutdown (lq < 1μA)
Output voltage up to 5.25V
Output disconnect during shutdown
Skip mode under light load condition
Undervoltage lockout (ISL9111 only)
Fault protection:
Overvoltage protection (ADJ version only)
Overtemperature protection
Short circuit protection
6 Ld SOT-23 package

Applications
Products including portable HDMI and USB-OTG
Personal medical products
Wireless mouse/keyboard
Bluetooth headsets
MP3/MP4 players/DSC
Single-cell, dual-cell, and triple-cell alkaline, NiCd, NiMH powered products