MPQ4322 – 42V LOAD DUMP, 2A, LOW-IQ, SYNC STEP-DOWN CONVERTER, AEC-Q100
ELECTRICAL CHARACTERISTICS
VIN = 12V, VEN = 2V, TJ = -40°C to +150°C, typical values are at TJ = 25°C, unless otherwise noted.
Parameter
Symbol
Condition
Min
Typ
Max
Units
Input Supply
VIN under-voltage lockout
(UVLO) rising threshold
VIN_UVLO_RISING
3.4
2.6
3.65
2.9
3.9
3.1
V
V
VIN UVLO falling
threshold
VIN_UVLO_FALLING
VIN_UVLO_HYS
VIN UVLO hysteresis
750
20
mV
µA
VFB = 0.85V, no load, TJ = 25°C
28
34
VFB = 0.85V, no load,
µA
µA
VIN quiescent current
IQ
TJ = -40°C to +125°C (11)
VFB = 0.85V, no load,
TJ = -40°C to +150°C
80
VIN quiescent switching
current (11)
Switching, RFB1 = 1MΩ,
RFB2 = 191kΩ, no load
IQ_SWITCHING
ISD
25
1
µA
µA
VIN shutdown current
VEN = 0V
10
40
39
VIN over-voltage
protection (OVP) rising
threshold
VIN_OVP_RISING
35.5
34.5
37.5
V
VIN OVP falling threshold VIN_OVP_FALLING
36.5
1
V
V
VIN OVP hysteresis
VIN_OVP_HYS
Switches and Frequency
RFREQ = 86.6kΩ
RFREQ = 34.8kΩ
RFREQ = 15kΩ
332
900
415
1000
2200
±10
498
1100
2420
kHz
kHz
kHz
%
Switching frequency
without frequency spread
spectrum (FSS)
fSW
1980
FSS span
FSS modulation
frequency
15
kHz
Minimum on time (11)
Minimum off time (11)
Maximum duty cycle
tON_MIN
tOFF_MIN
DMAX
65
50
80
70
ns
ns
%
98
99.5
VEN = 0V, VSW = VBOOT = 0V or
VIN (TJ = 25°C)
0.01
0.01
70
1
5
µA
µA
Switch leakage current
ISW_LKG
VEN = 0V, VSW = VBOOT = 0V or
VIN (TJ = -40°C to +150°C)
High-side MOSFET
(HS-FET) on resistance
RDS(ON)_HS
RDS(ON)_LS
VBOOT - VSW = 5V
VCC = 5V
130
90
mΩ
mΩ
Low-side MOSFET
(LS-FET) on resistance
50
Output and Regulation
TJ = 25°C
0.794
0.790
0.8
0.8
0.806
0.810
V
V
FB voltage (adjustable-
output version)
VFB
TJ = -40°C to +150°C
MPQ4322 Rev. 1.0
4/6/2023
MonolithicPower.com
7
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