MP4560 – 2A, 2MHz, 55V STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS
VIN = 12V, VEN = 2.5V, VCOMP = 1.4V, TA= +25°C, unless otherwise noted.
Specifications over temperature are guaranteed by design and characterization.
Parameter
Symbol Condition
Min
Typ
Max Units
4.5V < VIN < 55V
0.780 0.800 0.820
Feedback Voltage
VFB
V
0.772
175
0.829
330
–40°C to +85°C
VBST – VSW = 5V
–40°C to +85°C
VEN = 0V, VSW = 0V
250
Upper Switch On Resistance (5)
Upper Switch Leakage
Current Limit
RDS(ON)
mꢀ
μA
A
160
400
1
2.6
2.2
3.2
4.5
4.7
–40°C to +85°C
COMP to Current Sense
Transconductance
GCS
5.7
A/V
Error Amp Voltage Gain
400
120
10
-10
3.0
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
µA
2.7
2.4
3.3
3.6
VIN UVLO Threshold
V
–40°C to +85°C
VIN UVLO Hysteresis
Soft-Start Time (5)
0.35
0.5
1
V
ms
0V < VFB < 0.8V
RFREQ = 95kꢀ
0.8
0.7
1.2
1.3
Oscillator Frequency
MHz
–40°C to +85°C
Minimum Switch On Time
Shutdown Supply Current
Quiescent Supply Current
Thermal Shutdown
100
12
ns
µA
µA
°C
ns
ns
VEN < 0.3V
No load, VFB = 0.9V
20
140
150
100
100
1.55
Hysteresis = 20°C
Minimum Off Time
Minimum On Time (5)
1.4
1.3
1.7
1.8
EN Up Threshold
V
–40°C to +85°C
EN Threshold Hysteresis
320
mV
Note:
5) Derived from bench characterization. Not tested in production.
MP4560 Rev. 1.0
11/5/2012
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