SYNC Voltage .............................................................6V
Operating Junction Temperature Range (Note 2)
LT8613E ............................................. –40°C to 125°C
LT8613I .............................................. –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
UDE PACKAGE
28-LEAD (3mm
×
6mm) PLASTIC QFN
θ
JA
= 40°C/W,
θ
JC(PAD)
= 5°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT8613EUDE#PBF
LT8613IUDE#PBF
TAPE AND REEL
LT8613EUDE#TRPBF
LT8613IUDE#TRPBF
PART MARKING*
LGHX
LGHX
PACKAGE DESCRIPTION
28-Lead (3mm × 6mm) Plastic QFN
28-Lead (3mm × 6mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Tape and reel specifications.
Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Input Voltage
V
IN
Quiescent Current
CONDITIONS
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
MIN
l
V
EN/UV
= 0V, V
SYNC
= 0V
l
V
EN/UV
= 2V, Not Switching, V
SYNC
= 0V
l
V
IN
Current in Regulation
Feedback Reference Voltage
Feedback Voltage Line Regulation
Feedback Pin Input Current
BIAS Pin Current Consumption
V
EN/UV
= 2V, Not Switching, V
SYNC
= 2V
V
OUT
= 0.97V, V
IN
= 6V, Output Load = 100µA
V
OUT
= 0.97V, V
IN
= 6V, Output Load = 1mA
V
IN
= 12V, I
LOAD
= 500mA
V
IN
= 12V, I
LOAD
= 500mA
V
IN
= 4.0V to 25V, I
LOAD
= 0.5A
V
FB
= 1V
V
BIAS
= 3.3V, I
LOAD
= 2A, 2MHz
l
l
l
l
0.964
0.958
–20
TYP
2.9
1.0
1.0
1.7
1.7
0.3
24
230
0.970
0.970
0.004
0.5
14
MAX
3.4
5
20
6
20
2.0
60
370
0.976
0.982
0.025
20
UNITS
V
µA
µA
µA
µA
mA
µA
µA
V
V
%/V
nA
mA
Rev. A
2
For more information
www.analog.com
LT8613
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum On-Time
Minimum Off-Time
Oscillator Frequency
Top Power NMOS On-Resistance
Top Power NMOS Current Limit
Bottom Power NMOS On-Resistance
Valley Current Limit
SW Leakage Current
EN/UV Pin Threshold
EN/UV Pin Hysteresis
EN/UV Pin Current
PG Upper Threshold Offset from V
FB
PG Lower Threshold Offset from V
FB
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
)
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
CONDITIONS
I
LOAD
= 2A, SYNC = 0V
I
LOAD
= 2A, SYNC = 3.3V
R
T
= 221k, I
LOAD
= 1.5A
R
T
= 60.4k, I
LOAD
= 1.5A
R
T
= 18.2k, I
LOAD
= 1.5A
I
SW
= 1A
V
INTVCC
= 3.4V, I
SW
= 1A
V
INTVCC
= 3.4V
V
IN
= 42V, V
SW
= 0V, 42V
EN/UV Rising
V
EN/UV
= 2V
V
FB
Falling
V
FB
Rising
V
PG
= 3.3V
V
PG
= 0.1V
SYNC Falling
SYNC Rising
V
SYNC
= 2V
Fault Condition, TR/SS = 0.1V
V
ICTRL
= 1.5V, V
ISN
= 3.3V
V
ICTRL
= 1.5V, V
ISN
= 0V
V
ICTRL
= 800mV, V
ISN
= 3.3V
V
ICTRL
= 800mV, V
ISN
= 0V
V
ICTRL
= 200mV, V
ISN
= 3.3V
V
ICTRL
= 200mV, V
ISN
= 0V
V
ISP-ISN
= 50mV, V
ISN
= 3.3V
V
ISP-ISN
= 50mV, V
ISN
= 0V
V
ISP-ISN
= 10mV, V
ISN
= 3.3V
V
ISP-ISN
= 10mV, V
ISN
= 0V
l
l
l
l
l
MIN
20
20
50
180
665
1.85
7.5
6
–10
0.94
–20
6.5
–6.5
–40
l
l
l
l
l
TYP
40
35
85
210
700
2.00
65
9.7
29
10
0.1
1.0
40
1
9.0
–9.0
1.3
680
1.0
1.3
2.1
230
50
50.5
41
42
10
10.5
1.00
0.99
220
205
MAX
60
55
120
240
735
2.15
12.0
12
10
1.06
20
11.5
–11.5
40
2000
1.4
1.55
100
2.7
52
56
46
47
15
17
1.040
1.09
320
300
20
l
l
0.7
1.0
–100
1.4
48
46
38
37
5
4
0.960
0.890
130
110
–20
l
l
l
l
l
l
l
l
l
l
l
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 LT8613E 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
LT8613I is guaranteed over the full –40°C to 125°C operating junction
UNITS
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
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
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