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ELECTRICAL CHARACTERISTICS
V
= 20 V unless otherwise noted.)
CC
Symbol
Soft−Start and Timer
I
Soft−Start or Jittering charge current @ V
ch
I
Jittering Discharge Current @ V
disch
V
Jittering Saw−Tooth Lower Threshold
jitter
V
H
Jittering Saw−Tooth Upper Threshold
jitter
V
L
Timer Peak Threshold
timer
I
Timer Charge Current @ V
timerC
I
Timer Discharge Current @ V
timerD
Feedback Section
Rup
Internal Pullup Resistor
Ifb
Source Current @ V
Iratio
Pin 8 to current Setpoint division ratio
Internal Ramp Compensation
R
Internal Resistor
ramp
V
Internal Saw−Tooth Amplitude
ramp
Skipping Mode and Standby Management
Rgts
Pin 1 output impedance in standby state
(Pin 8 grounded, V
Igts
Sink Current Source in Normal Mode
@ V
= 2 V, Pin 7 open @ V
pin8
FB−skip
Default Feedback Level for Skip−Cycle Operation and Standby
Detection
FB_stby−out
Default Feedback Level to Leave Standby
V
/V
Ratio leave standby Setpoint to skip−cycle Setpoint
stby−out
skip
R
Internal Pin 7 Impedance
pin7
Pin 7 to Skipping Setpoint ratio
Brown−Out Detection
BO
Brown−Out Detection Upper Threshold
thH
BO
Brown−Out Detection Low Threshold
thL
BO
Brown−Out Hysteresis
hyst
Protections
TSD
Thermal Shutdown:
Thermal Shutdown Threshold
Hysteresis
Vfault
Fault Detection Threshold
ORDERING INFORMATION
Device
NCP1239FDR2
NCP1239FDR2G
NCP1239VDR2
NCP1239VDR2G
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
NCP1239
(For typical values T
= 25°C, for min/max values T
J
Rating
= 2.4 V
pin6
= 2.4 V
pin6
= 3.5 V and Pin 8 open
pin6
= 3.5 V and Pin 8 open
pin6
= 0.5 V
pin8
> 4.5 V) @ V
= 12.5 V
pin6
CC
− V
=0.7 V
CC
pin1
http://onsemi.com
= 0°C to +125°C, V
J
Pin
6
6
6
6
6
6
6
8
8
−
10
10
1
1
7
7
7
5
5
5
3
Package
SOIC−16
SOIC−16
(Pb−Free)
SOIC−16
SOIC−16
(Pb−Free)
5
= 48 V,
pin16
Min
Typ
Max
60
95
110
77
107
137
1.67
1.80
1.89
2.85
3.00
3.20
4.0
4.3
4.6
3.9
5.2
6.4
−
400
−
−
20
−
−
200
−
−
3.0
−
−
32
−
−
3.2
−
4.0
8.0
18
0.6
1.0
−
380
430
480
650
740
810
1.5
1.7
1.9
−
110
−
−
3.0
−
0.45
0.50
0.55
0.20
0.24
0.28
0.20
0.26
0.30
140
30
2.2
2.4
2.6
†
Shipping
2500 / Tape & Reel
2500 / Tape & Reel
2500 / Tape & Reel
2500 / Tape & Reel
Unit
mA
mA
V
V
V
mA
mA
kW
mA
−
kW
V
kW
mA
mV
mV
−
kW
−
V
V
V
°C
V
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