NCP349(2009) View Datasheet(PDF) - ON Semiconductor
Part Name
Description
Manufacturer
NCP349
(Rev.:2009)
(Rev.:2009)
ON Semiconductor
NCP349 Datasheet PDF : 12 Pages
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NCP349
ELECTRICAL CHARACTERISTICS (Min/Max limits values (−40°C < TA < +85°C) and Vin = +5.0 V. Typical values are TA = +25°C,
unless otherwise noted.)
Characteristic
Symbol
Conditions
Min
Typ Max Unit
Input Voltage Range
Undervoltage Lockout Threshold (Note 4)
Vin
UVLO
−
Vin falls down UVLO threshold
from 5 V to 2.7 V
1.2
−
28
V
2.8
2.95 3.1
V
Undervoltage Lockout Hysteresis
UVLOhyst
Overvoltage Lockout Threshold (Note 4)
OVLO
NCP349MNAE
Vin rises up UVLO + UVLOhyst
Vin rises up OVLO threshold
30
60
90
mV
V
5.53 5.68 5.83
Overvoltage Lockout Hysteresis
OVLOhyst Vin falls down OVLO + OVLOhyst
NCP349MNAE
30
mV
60
90
Vin versus Vout Resistance
Supply Quiescent Current
RDS(on)
Idd
Vin = 5.0 V, EN = GND,
Load connected to Vout
No load. EN = 5.0 V
−
65
110 mW
−
70
150
mA
No load. EN = Gnd
−
140
250
mA
UVLO Supply Current
FLAG Output Low Voltage
Idduvlo
Volflag
VIN = 2.7 V
1.2 V < VIN < UVLO
Sink 50 mA on/FLAG pin
−
60
−
mA
−
20
400 mV
VIN > OVLO
Sink 1.0 mA on FLAG pin
−
−
400 mV
FLAG Leakage Current
EN Voltage High
FLAGleak
Vih
FLAG level = 5.0 V
−
−
1.0
−
nA
1.2
−
−
V
EN Voltage Low
Vol
−
−
−
0.4
V
EN Leakage Current
TIMINGS
Startup Delay
ENleak
EN = 5.0 V or GND
−
1.0
−
nA
ton
NCP349MNAE
From Vin > UVLO to Vout = 0.3 V
ms
(See Figures 3 & 7)
6.0
10
14
FLAG Going Up Delay
tstart
NCP349MNAE
From Vout = 0.3 V to FLAG =
1.2 V (See Figures 3 & 9)
ms
6.0
10
14
Output Turn Off Time
toff
From Vin > OVLO to Vout < =
−
1.5
5.0
ms
0.3 V (See Figures 4 & 8)
Vin increasing from 5.0 V to 8.0 V
at 3.0 V/ms
Rload connected on Vout
Alert Delay
tstop
From Vin > OVLO to FLAG < =
0.4 V (See Figures 4 & 10)
−
1.0
−
ms
Vin increasing from 5.0 V to 8.0 V
at 3.0 V/ms
Rload connected on Vout
Disable Time
tdis
From EN > = 1.2 V to
−
1.0
5.0
ms
Vout < 0.3 V
Rload = 5.0 W
(See Figures 5 & 12)
NOTE: Electrical parameters are guaranteed by correlation across the full range of temperature.
4. Additional UVLO and OVLO thresholds ranging from UVLO and from OVLO can be manufactured. Contact your ON Semiconductor
representative for availability.
http://onsemi.com
4
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