TM
MP2359 – 1.2A, 24V, 1.4MHz STEP-DOWN CONVERTER IN A TSOT23-6
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage V
IN
....................................... 26V
V
SW
....................................... –0.3V to V
IN
+ 0.3V
V
BS
....................................................... 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
TOP VIEW
BST
GND
FB
1
2
3
6
5
4
SW
IN
EN
Recommended Operating Conditions
(2)
Supply Voltage V
IN
........................... 4.5V to 24V
Output Voltage V
OUT
...................... 0.81V to 15V
Ambient Temperature ................–40°C to +85°C
Thermal Resistance
Part Number*
MP2359DJ
MP2359DT
*
Package
TSOT23-6
SOT23-6
Temperature
–40°C to +85°C
–40°C to +85°C
(3)
TSOT23-6.............................. 220 .... 110..
°C/W
SOT23-6 ................................ 220 .... 110..
°C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The device function is not guaranteed outside of the
recommended operating conditions.
3) Measured on approximately 1” square of 1 oz copper.
θ
JA
θ
JC
For Tape & Reel, add suffix –Z (eg. MP2359DJ–Z)
For RoHS compliant packaging, add suffix –LF (eg.
MP2359DJ–LF–Z)
ELECTRICAL CHARACTERISTICS
V
IN
= 12V, T
A
= +25°C, unless otherwise noted.
Parameters
Feedback Voltage
Feedback Current
Switch-On Resistance
(4)
Switch Leakage
Current Limit
(4)
Oscillator Frequency
Fold-back Frequency
Maximum Duty Cycle
Minimum On-Time
(4)
Under Voltage Lockout Threshold Rising
Under Voltage Lockout Threshold Hysteresis
EN Input Low Voltage
EN Input High Voltage
EN Input Current
Supply Current (Shutdown)
Supply Current (Quiescent)
Thermal Shutdown
(4)
Note:
4) Guaranteed by design.
Symbol Condition
V
FB
I
FB
R
DS(ON)
V
EN
= 0V, V
SW
= 0V
f
SW
V
FB
= 0.6V
V
FB
= 0V
V
FB
= 0.6V
4.5V
≤
V
IN
≤
24V
V
FB
= 0.8V
Min
0.790
Typ
0.810
0.1
0.35
Max
0.830
Units
V
µA
Ω
µA
A
MHz
KHz
%
ns
V
mV
V
V
µA
10
1.2
1.8
1.4
460
87
100
2.8
150
1.7
t
ON
2.5
3.1
0.4
1.2
V
EN
= 2V
V
EN
= 0V
V
EN
=
0V
V
EN
=
2V, V
FB
= 1V
2.1
0.1
0.1
0.8
150
I
S
I
Q
1.0
1.0
µA
mA
°C
MP2359 Rev. 1.1
6/23/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
2
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