AMS1073 Datasheet, PDF (1/6 Pages) Advanced Monolithic Systems Ltd – 1.2A Peak Output Current

AMS1073
DESCRIPTION
The AMS1073 is a monolithic step-down switch
mode converter with a built-in power MOSFET.
It achieves 1.2A peak output current over a
wide input supply range with excellent load and
line regulation. Current mode operation
provides fast transient response and eases loop
stabilization. Fault condition protection includes
cycle-by-cycle current limiting and thermal
shutdown.
The AMS1073 requires a minimum number of
readily available standard external components.
The AMS1073 is available in SOT23-6 packages.
FEATURES
• 1.2A Peak Output Current
• 0.35Ω Internal Power MOSFET Switch
• Stable with Low ESR Output Ceramic
Capacitors
• Up to 92% Efficiency
• 0.1μA Shutdown Mode
• Fixed 1.4MHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Wide 4.5V to 24V Operating Input Range
• Output Adjustable from 0.81V to 15V
• Available in SOT23-6 Packages
APPLICATIONS
• Distributed Power Systems
• Battery Charger
• Pre-Regulator for Linear Regulators
• WLED Drivers
TYPICAL APPLICATION
V_IN
12V
C1
10uF
OFF ON
5
IN
1
BST
C2
10nF
6
SW
AMS1073
D1
B230A
4
EN
GND
2
3
FB
L1
4.7uH
R1
49.9K
R2
16.2K
V_OUT
3.3V @ 1.2A
C3
22uF
1
Advanced Monolithic Systems http://www.ams-semitech.com