MP2363DN Monolithic Power Systems, MP2363DN Datasheet - Page 3

• Manufacturer Part Number: MP2363DN
• Description: 3A, 27V, 365khz Step-down Converter
• Manufacturer: Monolithic Power Systems

PIN FUNCTIONS
TYPICAL PERFORMANCE CHARACTERISTICS
V
MP2363 Rev. 1.0
6/15/2006
IN
Pin #
1
2
3
4
5
6
7
8
= 12V, V
95
90
85
80
75
70
65
60
55
50
Efficiency Curve vs
Load Current
V
0
OUT
COMP
0.5 1.0 1.5 2.0 2.5 3.0 3.5
Name Description
GND
SW
= 3.3V
BS
EN
SS
FB
IN
V
LOAD CURRENT (A)
IN
OUT
=12V
= 2.5V, L = 15µH, C1 = 10µF, C2 = 22µF, T
High-Side Gate Drive Boost Input. BS supplies the drive for the high-side N-Channel MOSFET
switch. Connect a 10nF or greater capacitor from SW to BS to power the high-side switch.
Power Input. IN supplies the power to the IC, as well as the step-down converter switches.
Drive IN with a 4.75V to 27V power source. Bypass IN to GND with a suitably large capacitor
to eliminate noise on the input to the IC. See Input Capacitor section of Application
Information.
Power Switching Output. SW is the switching node that supplies power to the output. Connect
the output LC filter from SW to the output load. Note that a capacitor is required from SW to BS
to power the high-side switch.
Ground. Connect the exposed pad on backside to Pin 4.
Feedback Input. FB senses the output voltage to regulate said voltage. Drive FB with a
resistive voltage divider from the output voltage. The feedback threshold is 0.92V. See Setting
the Output Voltage section of Application Information.
Compensation Node. COMP is used to compensate the regulation control loop. Connect a
series RC network from COMP to GND to compensate the regulation control loop. In some
cases, an additional capacitor from COMP to GND is required. See Compensation section of
Application Information.
Enable Input. EN is a digital input that turns the regulator on or off. Drive EN higher than 2.71V
to turn on the regulator, lower than 0.9V to turn it off. For automatic startup, leave EN
unconnected.
Soft Start Control Input. SS controls the soft start period. Connect a capacitor from SS to GND
to set the soft-start period. Soft-start cap is always recommended to eliminate the start-up
inrush current and for a smooth start-up waveform.
V
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
IN
=24V
V
IN
=9V
100
95
90
85
80
75
70
65
60
55
50
© 2006 MPS. All Rights Reserved.
0
Efficiency Curve vs
Load Current
V
www.MonolithicPower.com
OUT
0.5 1.0 1.5 2.0 2.5 3.0 3.5
V
= 5V
MP2363 – 3A, 27V, 365KHz STEP-DOWN CONVERTER
IN
LOAD CURRENT (A)
=12V
V
IN
=9V
V
IN
A
=24V
= +25°C, unless otherwise noted.
7.0
6.5
6.0
5.5
5.0
4.5
4.0
0
Limit Current vs
Duty Cycle
0.1
DUTY CYCLE (%)
0.2
0.3 0.4
0.5
0.6
0.7
3