AME, Inc.
AME5140
1.6 MHz Boost Converter With
30V Internal FET Switch
n
Typical Application
L/6.8uH
D1
V
IN
R3
51K
EN
GND
C1
2.2uF
GND
CF
680pF
SW
OUT
n
General Description
The AME5140 switching regulator is current-mode
boost converters operating at fixed frequency of 1.6 MHz.
V
IN
5V
The use of SOT-25, DFN-8(3mmx3mmx0.85mm)&
MSOP-8 packages, made possible by the minimal power
loss of the internal 1.6A switch, and use of small inductor
and capacitors result in the industry's highest power den-
sity. The 30V internal switch makes these solutions per-
fect for boosting to voltages up to 30V.
These parts have a logic-level shutdown pin that can
be used to reduce quiescent current and extend battery
life. Protection is provided through cycle-by-cycle cur-
rent limiting and thermal shutdown. Internal compensa-
tion simplifies and reduces component count.
AME5140
FB
EN
R1
43K
R2
13.3K
C2
22uF
L/10uH
D1
V
IN
R3
51K
EN
GND
C1
2.2uF
GND
CF
220pF
SW
OUT
V
IN
12V
n
Features
l
30V DMOS FET Switch
l
1.6 MHz Switching Frequency
l
Low R
DSON
DMOS FET
l
Switch Current Up to 1.6A
l
Wide Input Voltage Range (2.7V-5.5V)
l
Low Shutdown Current (<1µA)
l
SOT-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
EN
V
IN
EN
AME5140
FB
R1
117K
R2
13.3K
C2
4.7uF
L/10uH
D1
V
IN
R3
51K
EN
GND
C1
2.2uF
GND
CF
160pF
SW
OUT
18V
AME5140
FB
R1
183K
n
Applications
l
White LED Current Source
l
PDA's and Palm-Top Computers
l
Digital Cameras
l
Portable Phones and Games
l
Local Boost Regulator
R2
13.3K
C2
4.7uF
1
AME [ ANALOG MICROELECTRONICS ]
