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NB621 Datasheet(PDF) 3 Page - Monolithic Power Systems

Part # NB621
Description  8A, 25V, 600kHz Synchronous Step-Down Converter with Integrated LDO
PDF  14 Pages
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

NB621 Datasheet(HTML) 3 Page - Monolithic Power Systems

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NB621 – 8A, 25V, 600kHz SYNCHRONOUS STEP-DOWN CONVERTER WITH INTEGRATED LDO
NB621 Rev. 0.9
www.MonolithicPower.com
3
12/10/2013
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = +25°C, unless otherwise noted.
Parameters
Symbol
Condition
Min
Typ
Max
Units
Supply Current (Shutdown)
IIN
VENLDO = 0V
30
TBD
μA
Supply Current (Quiescent)
IIN
VEN = 2V, VFB = 1V
1.3
TBD
mA
High Side Switch On Resistance
(5)
HSWRDS-ON
50
mΩ
Switch Leakage
SWLKG
VEN = 0V, VSW = 0V
0
10
μA
Current Limit
(5)
ILIMIT
9.5
A
Oscillator Frequency
FSW
VFB = 0.75V
600
kHz
Fold-back Frequency
FFB
VFB = 100mV
0.25
fSW
Maximum Duty Cycle
DMAX
VFB = 700mV
85
90
%
Sync Frequency Range
FSYNC
0.3
2
MHz
Feedback Voltage
VFB
788
808
828
mV
Feedback Current
IFB
VFB = 800mV
10
50
nA
Soft Start Charging Current
ISS
VSS=0V
10
μA
EN/SYNC Input Low Voltage
VILEN
0.4
V
EN/SYNC Input High Voltage
VIHEN
2
V
VEN = 2V
2
EN Input Current
IEN
VEN = 0V
0
μA
EN Turn Off Delay
ENTd-Off
5
μsec
Power Good Threshold Rising
PGVth-Hi
0.9
VFB
Power Good Threshold Falling
PGVth-Lo
0.7
VFB
Power Good Delay
(5)
PGTd
0.42
Tss
(6)
Power
Good
Sink
Current
Capability
VPG
Sink 4mA
0.4
V
Power Good Leakage Current
IPG_LEAK
VPG = 3.3V
10
nA
VIN
Under
Voltage
Lockout
Threshold Rising
INUVVth
VENLDO=open
5.06
V
VIN
Under
Voltage
Lockout
Threshold Hysteresis
INUVHYS
VENLDO=open
450
mV
VCC
Under
Voltage
Lockout
Threshold Rising
VCCUVVth
VENLDO=open
3.8
4.0
4.2
V
VCC
Under
Voltage
Lockout
Threshold Hysteresis
VCCUVHYS
VENLDO=open
880
mV
VCC Regulator
VCC
4.5
5
V
VCC Load Regulation
ICC=20mA
5
%



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