AMS1070
DESCRIPTION
The
AMS1070
is a monolithic synchronous buck
regulator. The device integrates 100mΩ
MOSFETS that provide 3A of continuous load
current over a wide operating input voltage of
4.75V to 23V. Current mode control provides
fast transient response and cycle-by-cycle
current limit.
FEATURES
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3A Continuous Output Current
4A Peak Output Current
Wide 4.75V to 23V Operating Input Range
Integrated 100mΩ Power MOSFET Switches
Output Adjustable from 0.925V to 20V
Up to 95% Efficiency
Programmable Soft-Start
Stable with Low ESR Ceramic Output Capacitors
Fixed 380KHz Frequency
Cycle-by-Cycle Over Current Protection
Input Under Voltage Lockout
Thermally Enhanced 8-Pin
ESOP8
Package
Distributed Power Systems
Networking Systems
Notebook Computers
An adjustable soft-start prevents inrush current
at turn-on and in shutdown mode, the supply
current drops below 1µA.
This device, available in an 8-pin
ESOP8
package, provides a very compact system
solution with minimal reliance on external
components.
APPLICATIONS
TYPICAL APPLICATION
INPUT
4.75V to 23V
R4
100K
7
EN
C5
10nF
2
IN
1
BS
SW
3
L1
10uH (4A)
R1
26.1K
C1
10uF/25V
CERAMIC X 2
8
AMS1070
SS
GND
4
FB
COMP
6
OUTPUT
3.3V
3A
5
C4
0.1uF
C3
3.9nF
R3
6.8K
R2
10K
C2
22uF/6.3V
CERAMIC X 2
1
Advanced Monolithic Systems http://www.ams-semitech.com
AMS [ Advanced Monolithic Systems Ltd ]
