Philips VES1.1E - MP1583 (U174); 19.1 General description; 19.2 Features; 19.3 Pinning

19 MP1583 (U174)
19.1 General description
The MP1583 is a step-down regulator with a built-in internal Power MOSFET. It
achieves
3A of 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. An adjustable soft-start reduces the stress on the input source at start-
up. The MP1583 requires a minimum number of external components, providing a
compact solution.
19.2 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 4.75V to 23V Operating Input Range
• Output Adjustable from 1.22V to 21V
• Under-Voltage Lockout
19.3 Pinning
Pin
No.
Pin
Name
Description
1 BOOT
High-Side Gate Drive Bootstrap Input. BS supplies the drive for the
high-side N-Channel MOSFET switch.
2
IN
Power Input. Drive IN with a 4.75V to 23V power source.
3
SW
Power Switching Out is the switching node that supplies power to the
output
4
GND
Ground.
5
FB
Feedback Input. FB senses the output voltage and regulates it. Drive
FB with a resistive voltage divider from the output voltage. FB
threshold is 1.222V.
6
COMP
Compensation Node is used to compensate the regulation control
loop.