MP2562 – 1A, 4MHz, 50V STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS
VIN = 12V, VEN = 2.5V, VCOMP = 1.4V, TA= +25C, unless otherwise noted.
Parameter
Symbol Condition
Min
Typ
0.8
460
1
Max Units
Feedback Voltage
VFB
4.5V < VIN < 50V
0.776
0.824
V
mΩ
μA
A
Upper Switch On Resistance
Upper Switch Leakage
Current Limit
RDS(ON) VBST – VSW = 5V
VEN = 0V, VSW = 0V, VIN = 50V
Duty Cycle = 50%
1.8
200
60
Error Amp Voltage Gain
Error Amp Transconductance
Error Amp Min Source current
Error Amp Min Sink current
VIN UVLO Threshold
VIN UVLO Hysteresis
Soft-Start Time
V/V
µA/V
µA
µA
V
ICOMP = ±3µA
VFB = 0.7V
VFB = 0.9V
40
80
5
–5
2.7
3.0
0.4
1.3(5)
2
3.3
V
10%< VOUT <90%
RFREQ = 45kꢀ
RFREQ = 18kꢀ
VEN = 0V
ms
MHz
MHz
µA
µA
C
1.6
3.2
2.4
4.8
20
Oscillator Frequency
4
Shutdown Supply Current
Quiescent Supply Current
Thermal Shutdown
12
No load, VFB = 0.9V
120
150
15
145
Thermal Shutdown Hysteresis
Minimum Off Time (6)
Minimum On Time (6)
EN Up Threshold
C
100
100
1.5
300
ns
ns
1.3
1.7
V
EN Threshold Hysteresis
Note:
mV
5) The Soft-Start Time is measured based on VOUT from 10% to 90% and multiplied by 1.25 to get 0% to 100% Soft-Start Time.
6) Guaranteed by design.
MP2562 Rev. 1.0
2/28/2014
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