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ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
PARAMETER
INTV
Undervoltage Lockout
CC
BIAS Pin Current Consumption
Minimum On-Time
Minimum Off-Time
Oscillator Frequency
Top Power NMOS On-Resistance
Top Power NMOS Current Limit
Bottom Power NMOS On-Resistance
Bottom Power NMOS Current Limit
SW Leakage Current
EN/UV Pin Threshold
EN/UV Pin Hysteresis
EN/UV Pin Current
PG Upper Threshold Offset from V
PG Lower Threshold Offset from V
PG Hysteresis
PG Leakage
PG Pull-Down Resistance
SYNC Threshold
SYNC Pin Current
TR/SS Source Current
TR/SS Pull-Down Resistance
Current Sense Voltage (V
)
ISP-ISN
IMON Monitor Pin Voltage
ISP , ISN Pin Bias Current
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT8611E is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization, and correlation with statistical process controls. The
LT8611I is guaranteed over the full –40°C to 125°C operating junction
= 25°C.
A
CONDITIONS
V
= 3.3V, I
= 1A, 2MHz
BIAS
LOAD
I
= 1A, SYNC = 0V
LOAD
I
= 1A, SYNC = 3.3V
LOAD
R
= 221k, I
= 1A
T
LOAD
R
= 60.4k, I
= 1A
T
LOAD
R
= 18.2k, I
= 1A
T
LOAD
V
= 3.4V, I
= 1A
INTVCC
SW
V
= 3.4V
INTVCC
V
= 3.4V, I
= 1A
INTVCC
SW
V
= 3.4V
INTVCC
V
= 42V, V
= 0V, 42V
IN
SW
EN/UV Rising
V
= 2V
EN/UV
V
Falling
FB
FB
V
Rising
FB
FB
V
= 3.3V
PG
V
= 0.1V
PG
SYNC Falling
SYNC Rising
V
= 2V
SYNC
Fault Condition, TR/SS = 0.1V
V
= 1.5V, V
= 3.3V
ICTRL
ISN
V
= 1.5V, V
= 0V
ICTRL
ISN
V
= 800mV, V
= 3.3V
ICTRL
ISN
V
= 800mV, V
= 0V
ICTRL
ISN
V
= 200mV, V
= 3.3V
ICTRL
ISN
V
= 200mV, V
= 0V
ICTRL
ISN
V
= 50mV, V
= 3.3V
ISP-ISN
ISN
V
= 50mV, V
= 0V
ISP-ISN
ISN
V
= 10mV, V
= 3.3V
ISP-ISN
ISN
V
= 10mV, V
= 0V
ISP-ISN
ISN
For more information
The
denotes the specifications which apply over the full operating
l
temperature range. High junction temperatures degrade operating
lifetimes. Operating lifetime is derated at junction temperatures greater
than 125°C.
Note 3: This IC includes overtemperature protection that is intended to
protect the device during overload conditions. Junction temperature will
exceed 150°C when overtemperature protection is active. Continuous
operation above the specified maximum operating junction temperature
will reduce lifetime.
www.linear.com/LT8611
LT8611
MIN
TYP
MAX
2.5
2.6
2.7
8.5
30
50
70
l
30
45
65
l
50
80
110
180
210
240
l
665
700
735
l
1.85
2.00
2.15
l
120
3.5
4.8
5.8
l
65
2.5
3.3
4.8
–1.5
1.5
0.94
1.0
1.06
l
40
–20
20
6
9.0
12
l
–6
–9.0
–12
l
1.3
–40
40
680
2000
l
0.8
1.1
1.4
1.6
2.0
2.4
–40
40
1.2
2
3.2
l
230
48
50
52
l
46
50.5
56
l
38
41
46
l
37
42
47
l
5
10
15
l
4
10.5
17
l
0.960
1.00
1.040
l
0.890
0.99
1.090
l
130
220
320
l
110
205
300
l
–20
20
l
UNITS
V
mA
ns
ns
ns
kHz
kHz
MHz
mΩ
A
mΩ
A
µA
V
mV
nA
%
%
%
nA
Ω
V
V
nA
µA
Ω
mV
mV
mV
mV
mV
mV
V
V
mV
mV
µA
8611fa
3
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