Datasheet

Electrical characteristics LNBH25L
20/28 Doc ID 022634 Rev 2
8 Electrical characteristics
Refer to Section 5 , T
J
from 0 to 85 °C, all data 1..4 register bits set to 0 unless VSEL1 = 1,
RSEL = 16.2 kΩ, DSQIN = LOW, V
IN
= 12 V, I
OUT
= 50 mA, unless otherwise stated. Typical
values are referred to T
J
= 25 °C. V
OUT
= V
OUT
pin voltage. See software description section
for I²C access to the system register (
Section 6 and Section 7 ).
.
Table 12. Electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
IN
Supply voltage
(1)
81216V
I
IN
Supply current
I
OUT
=0 mA 6 mA
22 kHz tone enabled (TEN=1,
DSQIN=High), I
OUT
=0 mA
10
VSEL1=VSEL2=VSEL3=VSEL4=0 1
V
OUT
Output voltage total accuracy Valid at any V
OUT
selected level -3.5 +3.5 %
V
OUT
Line regulation V
IN
=8 to 16 V 40 mV
V
OUT
Load regulation I
OUT
from 50 to 500 mA 75 100
I
MAX
Output current limiting
thresholds
RSEL = 16.2 kΩ
RSEL = 22 kΩ
500 750
mA
350 550
I
SC
Output short-circuit current RSEL= 16.2 kΩ 350 mA
SS Soft-start time V
OUT
from 0 to 13 V 4 ms
SS Soft-start time V
OUT
from 0 to 18 V 6 ms
T13-18 Soft transition rise time V
OUT
from 13V to 18 V 1.5 ms
T18-13 Soft transition fall time V
OUT
from 18V to 13 V 1.5 ms
T
OFF
Dynamic overload protection
OFF time
PCL=0, output shorted 900
ms
T
ON
Dynamic overload protection
ON time
PCL=0, output shorted T
OFF
/10
A
TONE
Tone amplitude
DSQIN=High, EXTM=0, TEN=1
I
OUT
from 0 to 500 mA
C
BUS
from 0 to 750 nF
0.55 0.675 0.8 V
PP
F
TONE
Tone frequency
DSQIN=High, EXTM=0, TEN=1
20 22 24 kHz
D
TONE
Tone duty cycle 43 50 57 %
t
r
, t
f
Tone rise or fall time
(2)
5815µs
Eff
DC/DC
DC-DC converter efficiency I
OUT
=500mA 93 %
F
SW
DC-DC converter switching
frequency
440 kHz
UVLO
Undervoltage lockout
thresholds
UVLO threshold rising 4.8
V
UVLO threshold falling 4.7
V
LP
Low power diagnostic (LPD)
thresholds
V
LP
threshold rising 7.2
V
V
LP
threshold falling 6.7