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MP2459 Datasheet(PDF) 3 Page - Monolithic Power Systems

Part # MP2459
Description  0.5A, 55V, 480kHz Step-Down Converter in a TSOT23-6
PDF  13 Pages
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP2459 Datasheet(HTML) 3 Page - Monolithic Power Systems

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MP2459 – 0.5A, 55V, 480kHz, STEP-DOWN CONVERTER IN A TSOT23-6
MP2459 Rev. 1.0
www.MonolithicPower.com
3
3/4/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = +25°C, unless otherwise noted.
Parameters
Symbol
Condition
Min
Typ
Max
Units
Feedback Voltage
VFB
4.5V ≤ VIN ≤ 55V
0.792
0.812
0.832
V
Feedback Current
IFB
VFB = 0.85V
0.1
µA
Switch-On Resistance
RDS(ON)
1
Switch Leakage
ISW_LKG
VEN = 0V, VSW = 0V
1
µA
Current Limit
ILIM
1.0
1.25
1.5
A
Oscillator Frequency
fSW
VFB = 0.6V
380
480
580
kHz
Foldback Frequency
fSW_F
VFB = 0V
150
kHz
Maximum Duty Cycle
DMAX
VFB = 0.6V
90
93.5
%
Minimum ON-Time
τ
ON
100
ns
Under-Voltage Lockout Threshold, Rising
VUVLO_R
2.9
3.3
3.7
V
Under-Voltage Lockout Threshold, Falling
VUVLO_F
2.65
3.05
3.45
V
Under-Voltage Lockout Threshold,
Hysteresis
VUVLO_HYS
250
mV
EN Threshold, Rising
VEN_R
1.35
V
EN Threshold, Falling
VEN_F
1.17
V
EN Threshold, Hysteresis
VEN_HYS
180
mV
EN Input Current
IEN
VEN = 2V
3.1
µA
VEN = 0V
0.1
Supply Current (Shutdown)
IS
VEN = 0V
0.1
1.0
µA
Supply Current (Quiescent)
IQ
VEN = 2V, VFB = 1V
0.73
0.85
mA
Thermal Shutdown
TSD
165
°C
Thermal Shutdown Hysteresis
TSD_HYS
20
°C



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