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NCP81172MNTXG Datasheet(PDF) 8 Page - ON Semiconductor

Part # NCP81172MNTXG
Description  2-Phase Synchronous Buck Controller
Download  14 Pages
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP81172MNTXG Datasheet(HTML) 8 Page - ON Semiconductor

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NCP81172
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8
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 12 V, VVCC = VPVCC = 5 V, VREFIN = 1.0 V, VPSI = 3.3 V, typical values are referenced to TJ = 25C, Min and Max values are
referenced to TJ from −40C to 100C. unless other noted)
Characteristics
Unit
Max
Typ
Min
Symbol
Test Conditions
POWER SAVE INPUT
PSI High Threshold
Rising
Falling
VhighPSI
2.05
2.4
2.2
2.55
V
PSI Low Threshold
Rising
Falling
VlowPSI
0.5
0.8
0.6
0.95
V
PSI Input Bias Current
IbiasPSI
1.0
mA
SOFT START AND PGOOD
Vout Startup Delay
Measured from EN to Vout Start up from 0 V
1.15
ms
Cout Startup Slew Rate
3.0
V/ms
PGOOD Startup Delay
Measured from EN to PGOOD assertion
2.0
ms
PGOOD Shutdown Delay
Measured from EN to PGOOD de−assertion
125
ns
PGOOD Low Voltage
IPGOOD= 4 mA (sink)
VlPGOOD
0.3
V
PGOOD Leakage Current
PGOOD = 5 V
IlkgPGOOD
1.0
mA
PROTECTION
Current Limit Threshold
Measured from PGND to Phx
(RILMT(1%) is connected from LG1
to GND)
RILMT is open
VOCTH
110
122
134
mV
RILMT = 6.98 kW
72
82
92
RILMT = 21.0 kW
89
100
111
RILMT = 35.7 kW
146
163
180
RILMT = 49.9 kW
OCP is disabled
Fast Under Voltage
Protection (FUVP)
Threshold
Voltage from FB to GND
0.15
0.2
0.25
V
Faster Under Voltage
Protection (FUVP) Delay
(Note 8)
2.0
ms
Slow Under Voltage
Protection (SUVP)
Threshold
Voltage from COMP to GND
3.0
V
Slow Under Voltage
Protection (SUVP) Delay
(Note 8)
50
us
Over Voltage Protection
(OVP) Threshold
Voltage from FB to GND
1.85
2.0
2.15
V
Over Voltage Protection
(OVP) Delay
(Note 8)
2.0
ms
Over Temperature
Protection (OTP)
Threshold
(Note 8)
Tsd
140
150
C
Recovery Temperature
Threshold
(Note 8)
Trec
125
C
Over Temperature
Protection (OTP) Delay
(Note 8)
125
ns
OUTPUT DISCHARGE
Output Discharge
Resistance per Phase
Measured from PHx to PGND when EN is low (Note 8)
Rdischrg
2
kW
8. Guaranteed by design, not tested in production.


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