NCP349 Datasheet, PDF (4/12 Pages) ON Semiconductor – Positive Overvoltage Protection Controller with Internal Low RON NMOS FET

NCP349
ELECTRICAL CHARACTERISTICS (Min/Max limits values (−40°C < T_A < +85°C) and V_in = +5.0 V. Typical values are T_A = +25°C,
unless otherwise noted.)
Characteristic
Symbol
Conditions
Min
Typ Max Unit
Input Voltage Range
Undervoltage Lockout Threshold (Note 4)
V_in
UVLO
−
V_in 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
UVLO_hyst
Overvoltage Lockout Threshold (Note 4)
OVLO
NCP349MNAE
V_in rises up UVLO + UVLO_hyst
V_in rises up OVLO threshold
30
60
90
mV
V
5.53 5.68 5.83
Overvoltage Lockout Hysteresis
OVLO_hyst V_in falls down OVLO + OVLO_hyst
NCP349MNAE
30
mV
60
90
V_in versus V_out Resistance
Supply Quiescent Current
R_DS(on)
Idd
V_in = 5.0 V, EN = GND,
Load connected to V_out
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
Idd_uvlo
Vol_flag
V_IN = 2.7 V
1.2 V < V_IN < UVLO
Sink 50 mA on/FLAG pin
−
60
−
mA
−
20
400 mV
V_IN > OVLO
Sink 1.0 mA on FLAG pin
−
−
400 mV
FLAG Leakage Current
EN Voltage High
FLAG_leak
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
EN_leak
EN = 5.0 V or GND
−
1.0
−
nA
ton
NCP349MNAE
From V_in > UVLO to V_out = 0.3 V
ms
(See Figures 3 & 7)
6.0
10
14
FLAG Going Up Delay
tstart
NCP349MNAE
From V_out = 0.3 V to FLAG =
1.2 V (See Figures 3 & 9)
ms
6.0
10
14
Output Turn Off Time
toff
From V_in > OVLO to V_out < =
−
1.5
5.0
ms
0.3 V (See Figures 4 & 8)
V_in increasing from 5.0 V to 8.0 V
at 3.0 V/ms
Rload connected on V_out
Alert Delay
tstop
From V_in > OVLO to FLAG < =
0.4 V (See Figures 4 & 10)
−
1.0
−
ms
V_in increasing from 5.0 V to 8.0 V
at 3.0 V/ms
Rload connected on V_out
Disable Time
tdis
From EN > = 1.2 V to
−
1.0
5.0
ms
V_out < 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