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MPQ8634B Datasheet(HTML) 5 Page - Monolithic Power Systems

Part No. MPQ8634B
Description  16V, 20A, Sync, Step-Down Converter with Adjustable Current Limit, Programmable Frequency, and Voltage Tracking
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Maker  MPS [Monolithic Power Systems]
Homepage  http://www.monolithicpower.com
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MPQ8634B Datasheet(HTML) 5 Page - Monolithic Power Systems

 
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MPQ8634B – 16V, 20A, SYNC, STEP-DOWN CONVERTER W/ ADJUSTABLE CURRENT LIMIT,
PROGRAMMBALE FREQUENCY, AND VOLTAGE TRACKING
MPQ8634B Rev. 1.02
www.MonolithicPower.com
5
11/16/2018
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2018 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VIN = 12 V, TJ = -40°C to +125°C, unless otherwise noted.
Parameters
Symbol
Condition
Min
Typ
Max
Units
Supply Current
Supply current (shutdown)
IIN
VEN = 0V
0
10
μA
Supply current (quiescent)
IIN
VEN = 2V, VFB = 1V
650
850
μA
MOSFET
Switch leakage
SWLKG_HS
VEN = 0V, VSW = 0V
0
10
μA
SWLKG_LS
VEN = 0V, VSW = 12V
0
30
HS on-state resistance
RDS_ON_HS
VEN = 2V @ 25oC
8.6
mΩ
LS on-state resistance
RDS_ON_LS
VEN = 2V @ 25oC
2.5
mΩ
Current Limit
Current limit threshold
VLIM
1.15
1.2
1.25
V
ICS to IOUT ratio
ICS/IOUT
IOUT ≥ 2A
9
10
11
μA/A
Low-side negative current limit
ILIM_NEG
-10
A
Negative current limit timeout (6)
tNCL_Timer
200
ns
Switching Frequency
Switching frequency (7)
fSW
MODE = GND, IOUT = 0A,
VOUT = 1V
480
600
720
kHZ
MODE = 30.1kΩ, IOUT = 0A,
VOUT = 1V
680
800
920
kHZ
MODE = 60.4kΩ, IOUT = 0A,
VOUT = 1V
850
1000
1150
kHZ
Minimum on time (6)
TON_MIN
50
ns
Minimum off time (6)
TOFF_MIN
VFB = 800mV
180
ns
Over-Voltage (OVP) and Under-Voltage Protection (UVP)
OVP threshold
VOVP
113%
116%
119%
VREF
UVP threshold
VUVP
77%
80%
83%
VREF
Feedback Voltage and Soft Start (SS)
Feedback voltage
VREF
TJ = -40°C to +125°C
891
900
909
mV
TJ = 0°C to +70°C
895
900
905
mV
TRK/REF sourcing current
ITRACK_Source VTRK/REF = 0V
42
μA
TRK/REF sinking current
ITRACK_Sink
VTRK/REF = 1V
12
μA
Soft-start time
tSS
CTRACK = 1nF
1
1.5
ms
Error Amplifier (EA)
Error amplifier offset
VOS
-3
0
3
mV
Feedback current
IFB
VFB = REF
50
100
nA
Enable AND UVLO
Enable input rising threshold
VIHEN
1.17
1.22
1.27
V
Enable hysteresis
VEN-HYS
200
mV
Enable input current
IEN
VEN = 2V
0
μA
Soft shutdown discharge
MOSFET
RON_DISCH
80
150


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