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MP2249 Arkusz danych(PDF) 3 Page - Monolithic Power Systems

Numer części MP2249
Szczegółowy opis  1MHz, 6V, 3A, Low-Voltage Synchronous Step-Down Converter
PDF  12 Pages
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Producent  MPS [Monolithic Power Systems]
Strona internetowa  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP2249 Arkusz danych(HTML) 3 Page - Monolithic Power Systems

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MP2249 – 6V, 3A, 1MHZ, SYNCHRONOUS STEP-DOWN CONVERTER
MP2249 Rev.1.0
www.MonolithicPower.com
3
11/2/2010
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VIN = VEN = 3.6V, TA = +25°C, unless otherwise noted.
Parameter
Symbol Condition
Min
Typ
Max
Units
Supply Current
IQ
VEN = VIN, VFB = 0.51V
480
600
µA
Shutdown Current
VEN = 0V, VIN = 6V
0.01
1
µA
IN
Under
Voltage
Lockout
(UVLO) Threshold
Rising Edge
2.15
2.3
2.45
V
IN
Under
Voltage
Lockout
Hysteresis
210
mV
Soft-Start Time
1
ms
Discharge
MOSFET
On
Resistance
100
Ω
TA = +25°C
0.594
0.600
0.606
Regulated FB Voltage
VFB
-40°C ≤ TA ≤ +85°C
0.588
0.600
0.612
V
FB Input Bias Current
VFB = 0.65V
-50
0.5
+50
nA
PFET On Resistance
(5)
ISW = 100mA
92
mΩ
NFET On Resistance
(5)
ISW = -100mA
72
mΩ
SW Leakage Current
VEN = 0V,VIN = 6V,
VSW = 0V or 6V
-1
+1
µA
PFET Current Limit
(5)
ILIMIT
Duty Cycle = 100%,
Current Pulse Width
< 1ms
4.5
A
Oscillator Frequency
fSW
1
MHz
Minimum On Time
(5)
tON
100
ns
Thermal
Shutdown
Trip
Threshold
(5)
145
°C
EN Turn-on Trip Threshold
-40°C ≤ TA ≤ +85°C
1.8
V
EN Turn-off Trip Threshold
-40°C ≤ TA ≤ +85°C
0.4
V
EN-pull down resistor
360
450
540
kΩ
Latch Off Under Voltage (UV)
Threshold
67%
VFB
PG Upper Trip Threshold
90%
VFB
PG Lower Trip Threshold
85%
VFB
PG Output Low Voltage
ISINK=1mA
0.3
V
Notes:
5) 100% production test at +25°C. Typical and temperature specifications are guaranteed by design and characterization.



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