PCN20070607

Features:

l  30V DMOS FET Switch
l  1.6 MHz Switching Frequency
l  Low R  DMOS FET
DSON
l  Switch Current Up to 1.8A
l  Wide Input Voltage Range (2.7V-5.5V)
l  Low Shutdown Current (<1mA)
l  SOT-25/TSOT-25, DFN-8(3mmx3mmx0.85mm)
      MSOP-8 Packages
l  Uses Tiny Capacitors and Inductor
l  Cycle-by-Cycle Current Limiting
        l  All AME's Lead Free Products Meet RoHS
     Standards


Application

l  White LED Current Source
l  PDA's and Palm-Top Computers
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 (3mm x 3mm x
0.85mm) & 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 AME5140 makes
hese 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
ife. Protection is provided through cycle-by-cycle cur-
rent limiting and thermal shutdown. Internal compensa-
ion simplifies and reduces component count.