MP1484 – 3A, 18V, 340KHz SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER
PACKAGE REFERENCE
TOP VIEW
BS
IN
SW
GND
1
2
3
4
8
7
6
5
SS
EN
COMP
FB
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage V
IN
....................... –0.3V to +24V
Switch Voltage V
SW
................. –1V 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)
EXPOSED PAD
ON BACKSIDE
CONNECT
TO GND PIN
Input Voltage V
IN
............................ 4.75V to 18V
Output Voltage V
OUT
.................... 0.925V to 15V
Ambient Operating Temp .............. –20°C to +85°C
Thermal Resistance
Part Number*
MP1484EN
*
Package
Temperature
SOIC8N
–20°C to +85°C
(Exposed Pad)
(3)
SOIC8N(Exposed Pad) .......... 50 ...... 10...
°C/W
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.
θ
JA
θ
JC
For Tape & Reel, add suffix –Z (e.g. MP1484EN -Z)
For Lead Free, add suffix –LF (e.g. MP1484EN - LF-Z)
ELECTRICAL CHARACTERISTICS
V
IN
= 12V, T
A
= +25°C, unless otherwise noted.
Parameter
Shutdown Supply Current
Supply Current
Feedback Voltage
Feedback Overvoltage Threshold
Error Amplifier Voltage Gain
(4)
Error Amplifier Transconductance
High-Side/Low-Side Switch On-
Resistance
(4)
High-Side Switch Leakage Current
Upper Switch Current Limit
Lower Switch Current Limit
COMP to Current Sense
Transconductance
Oscillation Frequency
Short Circuit Oscillation Frequency
Maximum Duty Cycle
Minimum On Time
(4)
EN Shutdown Threshold Voltage
EN Shutdown Threshold Voltage
Hysterisis
V
FB
A
EA
G
EA
∆I
C
=
±10µA
Symbol Condition
V
EN
= 0V
V
EN
= 2.0V, V
FB
= 1.0V
4.75V
≤
V
IN
≤
18V
0.900
Min
Typ
0.3
1.3
0.925
1.1
400
820
85
V
EN
= 0V, V
SW
= 0V
Minimum Duty Cycle
From Drain to Source
G
CS
F
osc1
F
osc2
D
MAX
T
ON
300
V
FB
= 0V
V
FB
= 1.0V
V
EN
Rising
1.1
3.8
0
5.3
0.9
5.2
340
110
90
220
1.5
220
380
10
Max
3.0
1.5
0.950
Units
µA
mA
V
V
V/V
µA/V
mΩ
µA
A
A
A/V
KHz
KHz
%
ns
V
mV
2.0
MP1484 Rev. 0.9
10/20/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
2
2008120908500031
MIPS [ MIPS TECHNOLOGIES, INC. ]
