NCV8720
www.onsemi.com
4
ELECTRICAL CHARACTERISTICS
Over Operating Temperature Range (T
J
= −40°C to +125°C), V
BIAS
= (V
OUT
+ 1.4 V) or 2.5 V, whichever is greater; V
IN
≥ V
OUT
+ 0.5 V,
I
OUT
= 1 mA, V
EN
= 1.1 V, C
OUT
= 2.2 mF, unless otherwise noted. Typical values are at T
J
= +25°C.
Parameter
Test Conditions Symbol Min Typ Max Unit
Operating Input Voltage Range V
IN
V
OUT
+
V
DO
_
IN
5.5 V
Operating Bias Voltage Range V
BIAS
(V
OUT
+ 1.4)
≥ 2.4
5.5 V
Output Voltage Range (Note 4) 0.8 2.1 V
Output
Voltage
Accuracy
Nominal T
J
= +25°C V
OUT
±0.5 %
Over V
BIAS
, V
IN
, I
OUT
,
T
J
= –40°C to +125°C
V
OUT
+ 1.4 V ≤ V
BIAS
≤ 5.5 V,
V
OUT
+ 0.5 V ≤ V
IN
≤ 4.5 V,
0mA ≤ I
OUT
≤ 350 mA
V
OUT
-2 +2 %
V
IN
Line Regulation V
IN
= (V
OUT
+ 0.5 V) to 4.5 V, I
OUT
= 1mA
DV
OUT
/DV
IN
5.0
mV/V
V
BIAS
Line Regulation
V
BIAS
= (V
OUT
+ 1.4 V) or 2.5 V (which-
ever is greater) to 5.5 V, I
OUT
= 1 mA
DV
OUT
/DV
BIAS
16
mV/V
Load Regulation 0 mA ≤ I
OUT
≤ 350 mA (no load to full load)
DV
OUT
/DI
OUT
–1.0
mV/mA
V
IN
Dropout Voltage (Note 5)
V
IN
= V
OUT(NOM)
– 0.1 V,
(V
BIAS
– V
OUT(NOM)
) = 1.4 V,
I
OUT
= 350 mA
V
DO
_
IN
110 200 mV
V
BIAS
Dropout Voltage (Note 6) V
IN
= V
OUT(NOM)
+ 0.3 V, I
OUT
= 350 mA V
DO
_
BIAS
1.15 1.4 V
Output Current Limit VOUT = 0.9 x VOUT(NOM) I
CL
420 600 1000 mA
Bias Pin Current I
OUT
= 0 mA to 350 mA I
BIAS
80 110
mA
Shutdown Current (I
GND
) V
EN
≤ 0.4 V, T
J
= -40°C to +85°C ISHDN 0.5 2.0
mA
V
IN
Power-Supply Rejection Rati
V
IN
− V
OUT
≥ 0.5 V,
I
OUT
= 350 mA
f = 10 Hz
PSRR (V
IN
)
52
dB
f = 100 Hz 56
f = 1 kHz 65
f = 10 kHz 46
f = 100 kHz 37
f = 1 MHz 25
V
BIAS
Power-Supply Rejection
Ratio
V
IN
– V
OUT
≥ 0.5 V,
I
OUT
= 350 mA
f = 10 Hz
PSRR (V
BIAS
65
dB
f = 100 Hz 65
f = 1 kHz 70
f = 10 kHz 50
f = 100 kHz 35
f = 1 MHz 24
Output Noise Voltage
BW = 10 Hz to 100 kHz
V
N
40
mVRMS
Inrush Current on V
IN
I
VIN_INRUSH
100 +
I
LOAD
mA
Startup Time
V
OUT
= 95% V
OUT(NOM)
, I
OUT
= 350 mA,
C
OUT
= 2.2 mF
t
STR
140
ms
Enable Pin High (enabled) V
EN(HI)
1.1 V
Enable Pin Low (disabled) V
EN(LO)
0 0.4 V
Enable Pin Current V
EN
= 5.5 V I
EN
0.3 2.0
mA
Undervoltage Lock-out V
BIAS
rising
UVLO
1.6 V
Hysteresis V
BIAS
falling 0.2 V
Thermal Shutdown Temperature
Shutdown, temperature increasing
TSD
+160 °C
Reset, temperature decreasing +140 °C
Operating Junction Temperature T
J
–40 +125 °C
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
4. V
OUT
nominal value is factory programmable.
5. Measured for devices with V
OUT(NOM)
≥ 1.2V.
6. V
BIAS
– V
OUT
with V
OUT
= V
OUT(NOM)
– 0.1V. Measured for devices with V
OUT(NOM)
≥ 1.4 V.
