PCN20070802

Features:

  30V DMOS FET Switch
  1.6 MHz Switching Frequency
  Low R  DMOS FET
DSON
  Switch Current Up to 1.8A
  Wide Input Voltage Range (2.7V-5.5V)
  Low Shutdown Current (<1mA)
  SOT-25/TSOT-25, DFN-8(3mmx3mmx0.75mm) &
  MSOP-8 Packages
  Uses Tiny Capacitors and Inductor
  Cycle-by-Cycle Current Limiting
       All AME's Lead Free Products Meet RoHS
 Standards


Application

l  White LED Current Source
l  PDA's and Palm-Top Computer
l  Digital Cameras
l  Portable Phones and Games
l  Local Boost Regulator


Description

The AME5140 switching regulator is current-mode boost
converters operating at fixed frequency of 1.6 MHz.
The use of SOT-25/TSOT-25, DFN-8(3mmx3mmx
0.75mm) & MSOP-8 packages, made possible by the
minimal power loss of the internal 1.8A switch, and use
of small inductor and capacitors result in the industry's
highest power density. The 30V internal switch makes
these solutions perfect for boosting to voltages up to 30V.
These AME5140 have a logic-level shutdown pin that can
be used to reduce quiescent current and extend battery
life.  Protection of AME5140 is provided through cycle-by-cycle cur-
rent limiting and thermal shutdown. Internal compensa-
tion simplifies and reduces component count.