NCP3520/NCP3521
http://onsemi.com
4
ELECTRICAL CHARACTERISTICS (T
J
= 25°C, V
CC
= 5 V, V
D
= 2.0 V, EN = 3 V, External FET = NTMS4107N (Note 3), unless
otherwise specified)
Characteristic UnitMaxTypMinConditions
OUTPUT DRIVER
Source Current V
FB
= V
OUT
- 0.1 V, V
GATE
= 2.5 V -4 -3 -2 mA
Sink Current V
FB
= V
OUT
+ 0.1 V, V
GATE
= 2.5 V 2 3 4 mA
GENERAL
V
FB
Input Impedance
NCP3520 (1.2 V)
NCP3521 (1.5 V)
-
-
21
26
-
-
kW
V
S
Input Bias Current - 1.2 2.4 mA
V
S
Standby Current V
S
= 1 V, EN = 0 V 150 220 - mA
V
CC
Undervoltage Lockout V
CC
Rising 4.20 4.35 4.50 V
V
CC
Undervoltage Lockout Hysteresis 100 160 250 mV
V
D
Undervoltage Lockout (NCP3520) 0.72 0.84 0.96 V
V
D
Undervoltage Lockout (NCP3521) 0.90 1.05 1.20 V
V
D
Input Impedance
NCP3520 (1.2 V)
NCP3521 (1.5 V)
-
-
228
284
-
-
kW
Thermal Shutdown (Note 1) 150 180 210 °C
Thermal Hysteresis (Note 1) - 15 - °C
NON RUSH CURRENT ON STARTUP (NRCS) SHORT CIRCUIT PROTECTION (SCP)
NRCS Charge Current NRCS = 0.5 V 14 20 26
mA
SCP Charge Current NRCS = 0.5 V 14 20 26
mA
SCP Discharge Current NRCS = 0.5 V 300 400 -
mA
SCP Threshold Voltage 1.15 1.3 1.4 V
Short Detect Voltage V
FB
Decreasing V
FB
* 0.30 V
FB
* 0.35 V
FB
* 0.40 V
Power On Reset V
CC
- 50 -
mS
EN to G Turn on Delay - 50 -
mS
Short Circuit Powerup Decision Timer - 50 -
mS
NRCS Standby Voltage - 25 50 mV
ENABLE
Input Threshold
Low
High
-
2.0
1.34
1.40
0.8
-
V
V
Input Hysteresis - 60 - mV
Input Current EN = 3 V - 7 10
mA
1. Guaranteed by Design
2. Load regulation may vary with the selection of an external FET other than the NTMS4107N.
3. See “External Components” section on Page 8.
