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LC-22DV510
LC-24DV510
20. MP1583 (U174)
20.1.
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.
20.2.
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
20.3.
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.
7
EN
Enable/UVLO. A voltage greater than 2.71V enables operation. For
complete low current shutdown the EN pin voltage needs to be at less
than 900mV. When the voltage on EN exceeds 1.2V, the internal
regulator will be enabled and the soft-start capacitor will begin to
charge. The MP1583 will start switching after the EN pin voltage
reaches 2.71V.
8
SS
Soft-Start Control Input. SS controls the soft-start period.
20. MP1583 (U174)
20.1.
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.
20.2.
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
20.3.
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
19.
19.3
19.2
19.1
Summary of Contents for LC-22DV510K
Page 19: ...19 LC 22DV510 LC 24DV510 1 1 General Block Diagram 1 1 General Block Diagram ...
Page 27: ...27 LC 22DV510 LC 24DV510 4 4 Frequency response ...
Page 29: ...29 LC 22DV510 LC 24DV510 5 3 Absolute Ratings 5 3 1 Electrical Characteristics ...
Page 30: ...30 LC 22DV510 LC 24DV510 5 3 2 Operating Specifications ...
Page 31: ...31 LC 22DV510 LC 24DV510 5 4 Pinning ...
Page 33: ...33 LC 22DV510 LC 24DV510 6 3 2 Operating Specifications 6 4 Pinning ...
Page 35: ...35 LC 22DV510 LC 24DV510 Ì µ µ ò Ú ĞÉîê ĞÉîé µ º ò Ú ĞÍïêô ĞÍïéô ĞÍêğ µ µ ò ...
Page 48: ...48 LC 22DV510 LC 24DV510 12 4 Pinning 11 4 ...
Page 49: ...49 LC 22DV510 LC 24DV510 ...
Page 51: ...51 LC 22DV510 LC 24DV510 ...
Page 65: ...65 LC 22DV510 LC 24DV510 23 3 VGA CN132 22 3 ...
Page 68: ...68 LC 22DV510 LC 24DV510 23 3 Options Options Options 1 Options 2 ...
Page 74: ...74 LC 22DV510 LC 24DV510 4 Hardware Architecture Connector Arrangement ...
Page 75: ...75 LC 22DV510 LC 24DV510 Block Diagram ...
Page 86: ...86 LC 22DV510 LC 24DV510 NOTES ...
Page 100: ...100 LC 22DV510 LC 24DV510 29 PRINTED WIRING BOARD Main Unit PWB Top Side ...
Page 120: ...120 LC 22DV510 LC 24DV510 Notes ...
Page 123: ...123 LC 22DV510 LC 24DV510 Notes ...