MPQ4560 – 2A, 2MHz, 55V, STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS
VIN = 12V, VEN = 2.5V, VCOMP = 1.4V, TJ= –40°C to +125°C, unless otherwise noted. Typical Values
are at TJ=25°C.
Parameter
Symbol Condition
Min
Typ
Max Units
TJ=25°C
0.780 0.797 0.820
4.5V < VIN <
55V
Feedback Voltage
VFB
−40°C ≤ TJ ≤85°C
−40°C ≤ TJ ≤125°C
0.772
0.766
0.829
0.829
1.0
V
Feedback Leakage Current
Upper Switch On Resistance (5)
Upper Switch Leakage
Current Limit
IFB
0.1
μA
mΩ
μA
A
TJ=25°C
=
175
160
250
330
VBST – VSW
5V
RDS(ON)
ISW
400
VEN = 0V, VSW = 0V
TJ=25°C
1
2.6
2.2
3.2
4.5
4.7
ILIM
Duty Cycle ≤ 60%
COMP to Current Sense
Transconductance (5)
GCS
5.7
A/V
Error Amp Voltage Gain (6)
Error Amp Transconductance
Error Amp Min Source current
Error Amp Min Sink current
400
120
10
V/V
µA/V
µA
ICOMP = ±3µA
VFB = 0.7V
VFB = 0.9V
TJ=25°C
−10
3.0
µA
2.7
2.4
3.3
3.6
V
VIN UVLO Threshold
VIN UVLO Hysteresis
Soft-Start Time (5)
0.35
0.5
1
V
0V < VFB < 0.8V
0.19
0.8
ms
TJ=25°C
1.2
1.3
20
MHz
RFREQ
=
Oscillator Frequency
fSW
95kΩ
0.7
Shutdown Supply Current
Quiescent Supply Current
Thermal Shutdown (5)
Minimum Off Time (5)
Minimum On Time (5)
IS
VEN < 0.3V
12
µA
µA
°C
ns
ns
V
IQ
No load, VFB = 0.9V (no switching)
Hysteresis = 20°C
140
150
100
100
1.55
200
tOFF
tON
TJ=25°C
1.4
1.3
1.7
1.8
EN Rising Threshold
EN Threshold Hysteresis
320
mV
Note:
5) Derived from bench characterization. Not tested in production.
6) Guaranteed by design. Not tested in production.
MPQ4560 Rev. 1.1
3/29/2013
www.MonolithicPower.com
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3
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