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MP28259 датащи(PDF) 3 Page - Monolithic Power Systems

номер детали MP28259
подробное описание детали  High Efficiency, Fast Transient, 2A, 4.2V-20V Input Synchronous Step-down Converter in QFN12
PDF  18 Pages
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производитель  MPS [Monolithic Power Systems]
домашняя страница  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP28259 датащи(HTML) 3 Page - Monolithic Power Systems

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MP28259 – 2A, 4.2V-20V INPUT, FAST TRANSIENT SYNCHRONOUS STEP-DOWN CONVERTER
MP28259 Rev. 1.34
www.MonolithicPower.com
3
4/27/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = 25°C, unless otherwise noted.
Parameters
Symbol
Condition
Min
Typ
Max
Units
Supply current (shutdown)
IIN
VEN = 0V
0
μA
Supply current (quiescent)
IIN
VEN = 2V, VFB = 0.9V
360
μA
HS switch-on resistance
HSRDS-ON
130
mΩ
LS switch On-resistance
LSRDS-ON
80
mΩ
Switch leakage
SWLKG
VEN = 0V, VSW = 0V or
12V
0
10
μA
Current limit
(5)
ILIMIT
After soft-start time-out
3
4
A
One-shot on time
TON
R7 = 300kΩ, VOUT = 1.2V
250
ns
Minimum off time
TOFF
220
ns
Fold-back off time
TFB
ILIM = 1
4.5
μs
OCP hold-off time
TOC
ILIM = 1
50
μs
TA = 25°C
807
815
823
mV
Feedback toltage
VFB
TA = -40°C to 85°C
803
827
mV
Feedback current
IFB
VFB = 800mV
10
50
nA
Soft-start time
TSS
1
ms
EN rising threshold
ENVth-Hi
1.05
1.35
1.6
V
EN threshold hysteresis
ENVth-Hys
500
mV
EN input current
IEN
VEN = 2V
2
μA
VEN = 0V
0
Power-good rising threshold
PGVth-Hi
0.9
VFB
Power-good falling threshold
PGVth-Lo
0.85
VFB
Power-good delay
PGTd
0.5
ms
Power-good sink current
capability
VPG
Sink 4mA
0.4
V
Power-good leakage current
IPG_LEAK
VPG = 3.3V
10
nA
VIN under-voltage lockout
Threshold Rising
INUVVth
3.1
V
VIN under-voltage lockout
threshold hysteresis
INUVHYS
300
mV
Thermal shutdown
TSD
150
°C
Thermal shutdown hysteresis
TSD-HYS
25
°C
Note:
5) Guaranteed by design.



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