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