Datasheet

LT3692A
4
3692afc
For more information www.linear.com/3692A
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
VIN1/2
= 15V unless otherwise specified. (Note 3)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Soft-Start Source Current Ch 1/2 V
FB1/2
= 2V, V
SS1/2
= 0.07V
l
9.5 12 14.5 µA
Soft-Start V
OH
Ch 1/2 V
FB1/2
= 2V 1.9 2.15 2.4 V
Soft-Start Sink Current Ch 1/2 V
FB1/2
= 0.7V, V
SS1/2
= 2V 0.7 1.4 2 mA
Soft-Start V
OL
Ch 1/2 V
FB1/2
= 0V 120 160 200 mV
Soft-Start to Feedback Offset Ch 1/2 V
VC1/2
= 1V, V
SS1/2
= 0.4V
l
–12 0 12 mV
Soft-Start Sink Current Ch 1/2 POR V
FB1/2
= 2V, V
SS1/2
= 0.14V (Note 7) 150 400 600 µA
Soft-Start POR Threshold 70 100 140 mV
Soft-Start SW Disable Ch 1/2 V
FB1/2
= 0V (Note 7) 95 115 150 mV
CMPI Bias Current Ch 1/2 V
CMPI1/2
= 0.8V –100 0 100 nA
CMPO Leakage Ch 1/2 V
CMPI1/2
= 0.8V, V
CMPO1/2
= 40V, 70 500 nA
CMPI Threshold Ch 1/2 V
CMPI1/2
Rising
l
700 720 760 mV
CMPI Threshold Ch 1/2 of V
FB1/2
V
CMPI1/2
Rising (Note 8) 86 90 94 %
CMPI Hysteresis Ch 1/2 V
CMPI1/2
35 60 85 mV
CMPO Sink Current Ch 1/2 V
CMPI1/2
= 0.6V, V
CMPO1/2
= 0.2V, 200 300 µA
RT/SYNC Reference Current V
RT/SYNC
= 0.36V (E- and I-Grade)
V
RT/SYNC
= 0.36V (H-Grade)
l
l
11.3
11.2
12
12
12.7
13
µA
µA
Minimum Switching Frequency R
RT/SYNC
=0Ω 50 110 150 kHz
Switching Frequency R
RT/SYNC
= 28k 925 1 1075 kHz
Maximum Switching Frequency R
RT/SYNC
=100k 2.25 2.5 3.0 MHz
Switching Phase Angle Ch 1 ≥ Ch 2 185 Deg
DIV Reference Current V
DIV
= 1V
l
10.7 12 13.3 µA
CH1 DIV 2 Threshold R
RT/SYNC
= 0V 0.44 0.5 0.56 V
CH1 DIV 4 Threshold R
RT/SYNC
= 0V 0.89 1.0 1.06 V
CH1 DIV 8 Threshold R
RT/SYNC
= 0V 1.39 1.5 1.56 V
CLKOUT V
OL
0.25 V
CLKOUT V
OH
2 V
CLKOUT to SW1ON Delay ( t
DCLKOSW1
) CLKOUT Rising 60 ns
CLKOUT to SW2ON Delay ( t
DCLKOSW2
) CLKOUT Falling 30 ns
RT/SYNC to CLKOUT Delay ( t
DRTSYNCH
) V
RT/SYNC
= 0V to 2V Rising Edge 300 ns
RT/SYNC to CLKOUT Delay ( t
DRTSYNCL
) V
RT/SYNC
= 2V to 0V Falling Edge 150 ns
SYNC Frequency Range 250 2000 kHz
SYNC Phase Angle Ch 1 to Ch 2 SYNC Frequency = 250kHz 180 Deg
Minimum Switch On-Time Ch 1/2 140 ns
Minimum Switch Off-Time Ch 1/2 200 ns