Monolithic Power Systems
General Description
The MP1583 is a step-down regulator with a built
in internal Power MOSFET. It achieves 3A
continuous 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.
Adjustable soft-start reduces the stress on the
input source at turn-on. In shutdown mode the
regulator draws 20µA of supply current.
The MP1583 requires a minimum number of
readily available external components to
complete a 3A step down DC to DC converter
solution.
Ordering Information
Part Number ∗ Package
Temperature
MP1583DS
SOIC8
-40 to + 85°C
MP1583DN
SOIC8 w/ Exposed
Paddle
-40 to + 85°C
MP1583DP
PDIP8
-40 to + 85°C
EV0015
MP1583DN Evaluation Board
∗ For Tape & Reel use suffix - Z (e.g. MP1583DS-Z)
Figure 1: Typical Application Circuit
INPUT
4.75 to 23V
IN
BS
SW
EN M P1583
SS
GND
FB
COMP
MP1583
3A, 23V
Step Down Converter
Features
3A Output Current
Programmable Soft-Start
100mΩ Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic
Capacitors
Up to 95% Efficiency
20µA Shutdown Mode
Fixed 385KHz frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.75 to 23V operating Input Range
Output Adjustable From 1.22 to 21V
Under Voltage Lockout
Available in 8 pin SOIC Package
3A Evaluation Board Available
Applications
Distributed Power Systems
Battery Charger
Pre-Regulator for Linear Regulators
OUTPUT
2.5V, 3A
MP1583 Rev 2.0_06/30/04
www.monolithicpower.com
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