NCP4326
http://onsemi.com
7
ELECTRICAL CHARACTERISTICS (For typical values T
J
= 25°C, for min/max values T
J
= 0°C to +105°C, Vcc = 12 V unless
otherwise noted.)
Characteristic
Pin Symbol Min Typ Max Unit
Drive Output (Note 1)
Output Voltage Rise Time (C
L
= 1.0 nF, T
J
= 25°C) 11, 13 t
r1,
2
− 60 100 ns
Output Voltage Fall Time (C
L
= 1.0 nF, T
J
= 25°C) 11, 13 t
f1,
2
− 40 100 ns
Output Voltage Low State @ Vcc = 15 V
(Isink = 250 mA)
(Isink = 20 mA)
11, 13 V
OL1,
2
−
−
1.5
1.0
2.2
1.5
V
Output Voltage Low State with UVLO activated @ Vcc = 4.0 V
(Isink = 1.0 mA) (Note 1)
11, 13 V
OL_UVLO1,
2
− 0.5 1.0 V
Output Voltage High State @ Vcc = 15 V
(Isource = 250 mA)
(Isource = 20 mA)
11, 13 V
OH1,
2
11
12
13.4
13.5
−
−
V
Standby Pin
Input Threshold Voltage (V
STBY
increasing) 10 V
th
− 2.5 − V
Hysteresis (V
STBY
decreasing) 10 V
H
− 600 − mV
Standby Propagation Delay when the Standby Mode is activated
with 1 nF connected to DRVx pin and with V
CPx
> 4.0 V (Figure 4)
10 T
stby_on
− 550 − ns
Standby Propagation Delay when the Standby Mode is released,
ENx pin is floating, V
CPx
> 4.0 V and with 1.0 nF connected to DRVx
pin (Figure 4)
10 T
stby_off
− 1.0 −
s
Pullup Resistor Value 10 R
pullup
− 40 −
k
Enable/Soft−Start Pin
Enable Soft−Start Mode or Disable Driver Mode Threshold
(Note 2, Figure 5)
3, 16 V
ENX_TH1
0.5 0.75 1.0 V
Maximum Voltage on ENx pin ending Soft−Start and Enable the
Regulation Mode (Figure 5)
3, 16 V
ENX_TH2
− 4.5 4.8 V
Voltage on ENx pin when ENx is floating 3, 16 V
ENX_max1
− 5.0 − V
Voltage on ENx pin with External Sink Current @ 500 A
3, 16 V
ENX_max2
− 5.1 − V
Internal Current Source when V
ENX
= 2.5 V (Note 3) 3, 16 I
ENX
120 160 220
A
Turn ON Propagation Delay in Soft−Start Mode (Note 4) when
applying an external falling edge on Flux pin from 100 mV to 0 V @
V
ENX
= 1.0 V, V
CPx
= 5.0 V and 1.0 nF connected to DRVx pin.
(Timing definition see Figure 6)
3, 14 and 11
or
16, 14 and 13
T
SS_ON
− 450 800 ns
Turn OFF Propagation Delay in Soft−Start Mode (Note 4) when
applying an external rising edge on Flux pin from 0 V to 100 mV @
V
ENX
= 1.0 V, V
CPx
= 5.0 V and 1.0 nF connected to DRVx pin.
(Timing definition see Figure 6)
3, 16 T
SS_OFF
− 450 800 ns
Discharge time when the controller is placed in Standby or when the
Vcc is removed @ C
ENX
= 330 nF from 90% of V
EN_max1
to
V
ENX_TH1
(Figure 1)
3, 16 T
stby_disch
− 1.0 − ms
1. The output drivers are kept OFF when the Vcc < UVLO level.
2. Below the V
ENX_TH1
threshold the driver is disabled and above this value the soft−start duty cycle generation is allowed.
3. See characterization curve for charging current versus Vcc and V
ENX
.
4. Soft−Start mode operation when the V
CPx
pin = 5.0 V (or when the controlled output voltage is not yet in regulation).
