Datasheet

LM5023
www.ti.com SNVS961D –APRIL 2013–REVISED JANUARY 2014
ELECTRICAL CHARACTERISTICS
Minimum and Maximum apply over the junction temperature range of –40°C to +125° C. Minimum and maximum limits are
specified through test, design, or statistical correlation. Typical values represent the most likely parametric norm at +25°C,
and are provided for reference purposes only. Unless otherwise specified, the following conditions apply: VCC = 10 V, F
SW
=
100 kHz 50% Duty Cycle, No Load on OUT.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
BIAS SUPPLY INPUT
VCC
ON
Controller enable threshold 12 12.8 13.5 V
VCC
OFF
Minimum operating voltage 7.0 7.5 8.0 V
V
RST
Internal logic reset (fault latch) 4.5 5.0 5.5 V
ICC
ST
ICC current while in standby mode COMP = 0.5V, CS = 0 V, no switching 340 420 µA
ICC
OP
Operating supply current COMP = 2.25 V, OUT switching 800 µA
SHUTDOWN CONTROL (VSD pin)
I
VSD OFF
Off state leakage current 0.1 µA
V
VSD ON1
ON state pull-down voltage at 10 uA After VCC
ON
(I
VSD
= 10 uA) 0.65 V
V
VSD_ON2
ON state pull-down voltage at 100 uA After VCC
ON
(I
VSD
= 100 uA) 0.84 V
SKIP CYCLE MODE COMPARATOR
V
SKIP
Skip cycle mode enable threshold CS Rising 70 120 170 mV
V
SK-HYS
Skip cycle mode hysteresis 12 mV
QR DETECT
V
OVP
Overvoltage comparator threshold 2.85 3 3.17 V
T
OVP
Sample delay for OVP 870 1050 1270 ns
V
DEM
VDEM demagnetization threshold 0.35 V
F
MAX
Maximum frequency 114 130 148 kHz
T
RST
T
RESTART
9.4 12 15.7 µs
PWM COMPARATORS
TP
PWM
COMP to OUT delay COMP set to 2 V CS stepped 0 to 0.4
V, time to OUT transition low, C
LOAD
= 20 ns
0
D
MIN
Minimum duty cycle COMP = 0 V 0 %
G
COMP
COMP to PWM comparator gain 0.33
V
COMP-O
COMP open circuit voltage I(COMP)=20µa 4.3 4.9 5.8 V
V
COMP-H
COMP at maximum VCS 2.25 V
I
COMP
COMP short circuit current COMP = 0 V 132 µA
R
COMP
R pull-up 41 45 49 kΩ
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