MP4462 – 3.5A, 4MHz, 36V STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS
VIN = 12V, VEN = 2.5V, VCOMP = 1.4V, TA= +25°C, unless otherwise noted.
Parameter
Symbol Condition
Min
Typ
0.8
150
1
Max Units
Feedback Voltage
Upper Switch On Resistance
Upper Switch Leakage
Current Limit
VFB
4.5V < VIN < 36V
0.776
0.824
V
mꢀ
μA
A
RDS(ON) VBST – VSW = 5V
VEN = 0V, VSW = 0V, VIN = 36V
4.0
4.7
COMP to Current Sense
Transconductance
GCS
9
A/V
Error Amp Voltage Gain (5)
Error Amp Transconductance
Error Amp Min Source current
Error Amp Min Sink current
VIN UVLO Threshold
200
60
V/V
µA/V
µA
µA
V
ICOMP = ±3µA
VFB = 0.7V
VFB = 0.9V
40
80
5
–5
2.7
3.0
0.35
1.5
2
3.3
VIN UVLO Hysteresis
Soft-Start Time (5)
V
0V < VFB < 0.8V
ms
MHz
MHz
µA
µA
°C
RFREQ = 45kꢀ
1.6
3.2
2.4
4.8
20
Oscillator Frequency
R
FREQ = 18kꢀ
4
Shutdown Supply Current
Quiescent Supply Current
Thermal Shutdown
VEN = 0V
12
No load, VFB = 0.9V
120
150
15
145
Thermal Shutdown Hysteresis
Minimum Off Time (5)
Minimum On Time (5)
EN Up Threshold
°C
100
100
1.5
300
ns
ns
1.35
1.65
V
EN Hysteresis
mV
Note:
5) Guaranteed by design.
MP4462 Rev. 1.02
3/4/2013
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