MPQ4559 – 1.5A, 2MHz, 55V STEP-DOWN CONVERTER AEC-Q100 QUALIFIED
ELECTRICAL CHARACTERISTICS
VIN = 12V, VEN = 2.5V, VCOMP = 1.4V, TJ= –40C to +125C. Typical Values are at TJ=25C, unless
otherwise noted.
Parameter
Symbol Condition
Min
Typ
Max Units
0.780 0.800 0.820
TJ =25C
-40°C ≤ TJ ≤85°C
V
Feedback Voltage
VFB
4.5V < VIN < 55V
0.772
0.766
0.829
0.829
1.0
-40°C ≤ TJ ≤125°C
Feedback Leakage Current
Upper Switch On Resistance (5)
Upper Switch Leakage
Current Limit
IFB
0.1
μA
mΩ
μA
A
175
160
250
330
TJ=25C
RDS(ON) VBST – VSW = 5V
400
ISW
ILIM
VEN = 0V, VSW = 0V
1
1.9
1.8
2.3
4.5
4.7
TJ=25C
Duty Cycle ≤ 60%
COMP to Current Sense
Transconductance
GCS
5.7
A/V
Error Amp Voltage Gain
400
120
10
-10
3.0
3.0
0.35
0.5
1
V/V
µA/V
µA
Error Amp Transconductance
Error Amp Min Source current
Error Amp Min Sink current
ICOMP = ±3µA
VFB = 0.7V
VFB = 0.9V
TJ=25C
µA
2.7
2.4
3.3
3.6
V
VIN UVLO Threshold
VIN UVLO Hysteresis
Soft-Start Time (5)
V
ms
0V < VFB < 0.8V
RFREQ = 95kΩ
VEN < 0.3V
No load, VFB = 0.9V (no
switching)
0.19
0.8
1.2
1.3
20
MHz
TJ =25C
Oscillator Frequency
fSW
IS
0.7
Shutdown Supply Current
Quiescent Supply Current
12
µA
µA
IQ
140
200
Thermal Shutdown
Minimum Off Time
Minimum On Time (5)
150
100
100
1.55
Hysteresis = 20C
TJ=25C
C
ns
ns
V
TOFF
TON
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.
MPQ4559 Rev. 1.01
5/24/2016
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