TM
MP2359 – 1.2A, 24V, 1.4MHz STEP-DOWN CONVERTER IN A TSOT23-6
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS (1)
Supply Voltage VIN....................................... 26V
VSW....................................... –0.3V to VIN + 0.3V
VBS ....................................................... VSW + 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)
Supply Voltage VIN........................... 4.5V to 24V
Output Voltage VOUT ...................... 0.81V to 15V
Ambient Temperature................–40°C to +85°C
TOP VIEW
BST
GND
FB
1
2
3
6
5
4
SW
IN
EN
Thermal Resistance (3)
θJA
θJC
TSOT23-6..............................220.... 110.. °C/W
SOT23-6................................220.... 110.. °C/W
Part Number*
Package
Temperature
–40°C to +85°C
–40°C to +85°C
MP2359DJ
MP2359DT
TSOT23-6
SOT23-6
Notes:
1) Exceeding these ratings may damage the device.
2) The device function is not guaranteed outside of the
recommended operating conditions.
For Tape & Reel, add suffix –Z (eg. MP2359DJ–Z)
For RoHS compliant packaging, add suffix –LF (eg.
MP2359DJ–LF–Z)
*
3) Measured on approximately 1” square of 1 oz copper.
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = +25°C, unless otherwise noted.
Parameters
Symbol Condition
Min
Typ
Max
Units
V
Feedback Voltage
VFB
IFB
0.790 0.810 0.830
4.5V ≤ VIN ≤ 24V
Feedback Current
Switch-On Resistance (4)
VFB = 0.8V
0.1
0.35
10
µA
Ω
RDS(ON)
Switch Leakage
Current Limit (4)
VEN = 0V, VSW = 0V
µA
A
1.8
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
fSW
VFB = 0.6V
VFB = 0V
1.2
1.4
460
87
1.7
MHz
KHz
%
VFB = 0.6V
tON
100
2.8
150
ns
2.5
1.2
3.1
0.4
V
mV
V
V
VEN = 2V
2.1
0.1
0.1
0.8
150
EN Input Current
µA
VEN = 0V
Supply Current (Shutdown)
Supply Current (Quiescent)
Thermal Shutdown (4)
IS
VEN = 0V
1.0
1.0
µA
mA
°C
IQ
VEN = 2V, VFB = 1V
Note:
4) Guaranteed by design.
MP2359 Rev. 1.1
6/23/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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