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MP2365 – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER
MP2365 Rev. 0.91
7/10/2006
www.MonolithicPower.com
2
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
PACKAGE REFERENCE
BS
IN
SW
GND
SS
EN
COMP
FB
1
2
3
4
8
7
6
5
TOP VIEW
EXPOSED PAD
CONNECT TO PIN 4
Part Number*
MP2365DN
Package
SOIC8N
Temperature
–40
°
C to +85
°
C
*
For Tape & Reel, add suffix –Z (eg. MP2365DN–Z)
For RoHS compliant packaging, add suffix –LF
(eg. MP2365DN–LF–Z)
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage V
IN
.......................–0.3V to +30V
Switch Voltage V
SW
.............. –0.5V to V
IN
+ 0.3V
Boost Voltage V
BS
..........V
SW
– 0.3V to V
SW
+ 6V
All Other Pins.................................–0.3V to +6V
Junction Temperature...............................150
°
C
Lead Temperature....................................260
°
C
Storage Temperature .............–65
°
C to +150
°
C
Recommended Operating Conditions
(2)
Input Voltage V
IN
............................4.75V to 28V
Ambient Operating Temp ..........–40
°
C to +85
°
C
Thermal Resistance
(3)
SOIC8N ..................................50...... 10...
°
C/W
θ
JA
θ
JC
Notes:
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its
operating conditions.
3) Measured on approximately 1” square of 1 oz copper.
ELECTRICAL CHARACTERISTICS
V
IN
= 12V, T
A
= +25
°
C, unless otherwise noted.
Parameters
Shutdown Supply Current
Supply Current
Symbol Condition
V
EN
=
0V
V
EN
= 3V, V
FB
=1.4V
4.75V
≤
V
IN
≤
28V,
V
COMP
< 2V
A
VEA
G
EA
I
COMP
=
±
10μA
R
DS(ON)1
R
DS(ON)2
V
EN
= 0V, V
SW
= 0V
G
CS
f
S
V
FB
= 0V
D
MAX
V
FB
= 0.8V
T
ON
V
EN
= 0V
C
SS
= 0.1
μ
F
Min
Typ
20
1.3
Max Units
30
1.5
μ
A
mA
Feedback Voltage
V
FB
0.90
0.92
0.94
V
Error Amplifier Voltage Gain
Error Amplifier Transconductance
High-Side Switch-On Resistance
Low-Side Switch-On Resistance
High-Side Switch Leakage Current
Short Circuit Current Limit
Current Sense to COMP Transconductance
Oscillation Frequency
Short Circuit Oscillation Frequency
Maximum Duty Cycle
Minimum On Time
EN Threshold Voltage
Enable Pull Up Current
Under Voltage Lockout Threshold Rising
Under Voltage Lockout Threshold Hysteresis
Soft-Start Period
Thermal Shutdown
400
530
100
10
0.1
6.5
6.2
1.4
220
65
130
1.2
1.6
2.6
210
10
160
V/V
μ
A/V
m
μ
A
A
A/V
MHz
KHz
%
ns
V
μ
A
V
mV
ms
°
C
330
0.9
0.9
2.3
730
10
1.5
2.3
2.9
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