AME5143 Datasheet, PDF (1/15 Pages) Analog Microelectronics – 1.4MHz Boost Converter With 30V Internal FET Switch

AME
AME5143
1.4MHz Boost Converter With
30V Internal FET Switch
„ General Description
The AME5143 switching regulator is current-mode boost
converters operating at fixed frequency of 1.4MHz.
The use of MSOP-8/PP package, 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 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.
„ Features
z 30V DMOS FET Switch
z 1.4MHz Switching Frequency
z Low R_DSON DMOS FET
z Switch Current Up to 1.8A (CS Connects
to GND)
z Wide Input Voltage Range (2.7V-5.5V)
z Low Shutdown Current (<1µA)
z MSOP-8/PP Package
z Uses Tiny Capacitors and Inductor
z Meet RoHS Standards
„ Applications
z White LED Current Source
z PDA's and Palm-Top Computers
z Digital Cameras
z Portable Phones and Games
z Local Boost Regulator
„ Typical Application
V IN
L1
C3
5V
10µH
10µF D1
VOUT
6V
C1
4.7µF
IN
SW
EN ^AME5143 SW
GND
CS
FB
CS
L2
10µH
Rcs Cs C2
22µF
R1 CF
59K 820pF
R2
15K
Figure 1. 5V to 6V Boost Converter
L1
4.7µH
V_IN
3.3V
C1
4.7µF
IN
SW
AME5143
EN
FB
GND
CS
R2
10K
D1
R1
30K
CF
820pF
VOUT
5V
750mA
C2
22µF
V_IN
5V
C1
4.7µF
Figure 2. 3.3V to 5V Boost Converter
L1
10µH
IN
SW
V_OUT
D1
12V
500mA
AME5143
EN
FB
R1
117K
GND
CS
R2
13.3K
CF
220pF
C2
10µF
Figure 3. 5V to 12V Boost Converter
Rev.A.01
1