(BST1-LSP), (BST1-LSN) .............................................6V Storage Temperature Range ................... –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
BG1
BST1
SW1
TG1
LSP
LSN
V
IN
INTV
CC
EN/UVLO
1
2
3
4
5
6
7
8
9
29
GND
28 BG2
SW1
27 BST2
26 SW2
25 TG2
24 V
OUT
23 LOADTG
22 SYNC/SPRD
21 RT
20 V
C
19 FB
18 SS
17
PGOOD
16 ISMON
15 ISN
TG1 1
LSP 2
LSN 3
V
IN
4
INTV
CC
5
EN/UVLO 6
TEST 7
LOADEN 8
9 10 11 12 13 14
V
REF
CTRL
ISP
ISN
ISMON
PGOOD
29
GND
TOP VIEW
BST1
BST2
SW2
22 TG2
21 V
OUT
20 LOADTG
19 SYNC/SPRD
18 RT
17 V
C
16 FB
15 SS
BG1
BG2
28 27 26 25 24 23
TEST 10
LOADEN 11
V
REF
12
CTRL 13
ISP 14
FE PACKAGE
28-LEAD PLASTIC TSSOP
θ
JA
= 30°C/W,
θ
JC
= 5°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
UFD PACKAGE
28-LEAD (4mm
×
5mm) PLASTIC QFN
θ
JA
= 43°C/W,
θ
JC
= 3.4°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT8390EFE#PBF
LT8390IFE#PBF
LT8390HFE#PBF
LT8390EUFD#PBF
LT8390IUFD#PBF
LT8390HUFD#PBF
TAPE AND REEL
LT8390EFE#TRPBF
LT8390IFE#TRPBF
LT8390HFE#TRPBF
LT8390EUFD#TRPBF
LT8390IUFD#TRPBF
LT8390HUFD#TRPBF
http://www.linear.com/product/LT8390#orderinfo
PART MARKING*
LT8390FE
LT8390FE
LT8390FE
8390
8390
8390
PACKAGE DESCRIPTION
28-Lead Plastic TSSOP
28-Lead Plastic TSSOP
28-Lead Plastic TSSOP
28-Lead (4mm × 5mm) Plastic QFN
28-Lead (4mm × 5mm) Plastic QFN
28-Lead (4mm × 5mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
8390fa
2
For more information
www.linear.com/LT8390
LT8390
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 12V, V
EN/UVLO
= 1.5V unless otherwise noted.
PARAMETER
Supply
V
IN
Operating Voltage Range
V
IN
Quiescent Current
V
OUT
Voltage Range
V
OUT
Quiescent Current
Linear Regulators
INTV
CC
Regulation Voltage
INTV
CC
Load Regulation
INTV
CC
Line Regulation
INTV
CC
Current Limit
INTV
CC
Dropout Voltage (V
IN
– INTV
CC
)
INTV
CC
Undervoltage Lockout Threshold
INTV
CC
Undervoltage Lockout Hysteresis
V
REF
Regulation Voltage
V
REF
Load Regulation
V
REF
Line Regulation
V
REF
Current Limit
V
REF
Undervoltage Lockout Threshold
V
REF
Undervoltage Lockout Hysteresis
Control Inputs/Outputs
EN/UVLO Shutdown Threshold
EN/UVLO Enable Threshold
EN/UVLO Enable Hysteresis
EN/UVLO Hysteresis Current
CTRL Input Bias Current
CTRL Latch-Off Threshold
CTRL Latch-Off Hysteresis
Load Switch Driver
LOADEN Threshold
LOADEN Hysteresis
Minimum V
OUT
for LOADTG to be On
LOADTG On Voltage V
(VOUT-LOADTG)
LOADTG Off Voltage V
(VOUT-LOADTG)
LOADEN to LOADTG Turn On Propagation Delay
LOADEN to LOADTG Turn Off Propagation Delay
LOADTG Turn On Fall Time
LOADTG Turn Off Rise Time
CONDITIONS
l
ELECTRICAL CHARACTERISTICS
MIN
4
TYP
MAX
60
2
2.8
60
0.5
0.5
60
5.15
4
4
160
3.64
2.03
1
0.2
3.2
1.90
UNITS
V
µA
µA
mA
V
µA
µA
µA
V
%
%
mA
mV
V
V
V
%
%
mA
V
mV
V
V
mV
µA
µA
µA
nA
mV
mV
V
mV
V
V
V
ns
ns
ns
ns
V
EN/UVLO
= 0.3V
V
EN/UVLO
= 1.1V
Not Switching
l
1
270
2.1
0
20
4.85
0.1
0.1
40
5.0
1
1
110
160
3.54
0.24
2.00
0.4
0.1
2.5
1.84
50
0.6
1.220
13
0
2.5
0
20
300
25
1.4
220
2.4
5
0
90
40
300
10
V
EN/UVLO
= 0.3V, V
OUT
= 12V
V
EN/UVLO
= 1.1V, V
OUT
= 12V
Not Switching, V
OUT
= 12V
I
INTVCC
= 20mA
I
INTVCC
= 0mA to 80mA
I
INTVCC
= 20mA, V
IN
= 6V to 60V
V
INTVCC
= 4.5V
I
INTVCC
= 20mA, V
IN
= 4V
Falling
I
VREF
= 100µA
I
VREF
= 0mA to 1mA
I
VREF
= 100µA, V
IN
= 4V to 60V
V
REF
= 1.8V
Falling
l
80
3.44
1.97
2
1.78
l
Falling
V
EN/UVLO
= 0.3V
V
EN/UVLO
= 1.1V
V
EN/UVLO
= 1.3V
V
CTRL
= 0.75V, Current Out of Pin
Falling
l
0.3
1.196
–0.1
2.2
–0.1
0
285
1.0
1.244
0.1
2.8
0.1
50
315
l
Rising
V
LOADEN
= 5V
V
OUT
= 12V
V
OUT
= 12V
C
LOADTG
= 3.3nF to V
OUT
, 50% to 50%
C
LOADTG
= 3.3nF to V
OUT
, 50% to 50%
C
LOADTG
= 3.3nF to V
OUT
, 10% to 90%
C
LOADTG
= 3.3nF to V
OUT
, 90% to 10%
l
1.3
1.5
3
5.4
0.1
4.6
–0.1
8390fa
For more information
www.linear.com/LT8390
3
LT8390
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 12V, V
EN/UVLO
= 1.5V unless otherwise noted.
PARAMETER
Error Amplifier
Full Scale Current Regulation V
(ISP-ISN)
1/10th Current Regulation V
(ISP-ISN)
ISMON Monitor Output V
ISMON
ISP/ISN Input Common Mode Range
ISP/ISN Low Side to High Side Switchover Voltage
ISP/ISN High Side to Low Side Switchover Voltage
ISP Input Bias Current
ISN Input Bias Current
ISP/ISN Current Regulation Amplifier g
m
FB Regulation Voltage
FB Line Regulation
FB Load Regulation
FB Voltage Regulation Amplifier g
m
FB Input Bias Current
V
C
Output Impedance
V
C
Standby Leakage Current
Current Comparator
Maximum Current Sense Threshold V
(LSP-LSN)
Reverse Current Sense Threshold V
(LSP-LSN)
LSP Pin Bias Current
LSN Pin Bias Current
Fault
FB Overvoltage Threshold (V
FB
)
FB Overvoltage Hysteresis
FB Short Threshold (V
FB
)
FB Short Hysteresis
ISP/ISN Over Current Threshold V
(ISP-ISN)
PGOOD
Upper Threshold Offset from V
FB
PGOOD
Lower Threshold Offset from V
FB
PGOOD
Pull-Down Resistance
SS Hard Pull-Down Resistance
SS Pull-Up Current
SS Pull-Down Current
CONDITIONS
V
CTRL
= 2V, V
ISP
= 12V
V
CTRL
= 2V, V
ISP
= 0V
V
CTRL
= 0.35V, V
ISP
= 12V
V
CTRL
= 0.35V, V
ISP
= 0V
V
(ISP-ISN)
= 100mV, V
ISP
= 12V/0V
V
(ISP-ISN)
= 10mV, V
ISP
= 12V/0V
V
(ISP-ISN)
= 0mV, V
ISP
= 12V/0V
V
ISP
= V
ISN
V
ISP
= V
ISN
V
LOADEN
= 5V, V
ISP
= V
ISN
= 12V
V
LOADEN
= 5V, V
ISP
= V
ISN
= 0V
V
EN/UVLO
= 0V, V
ISP
= V
ISN
= 12V or 0V
V
LOADEN
= 5V, V
ISP
= V
ISN
= 12V
V
LOADEN
= 5V, V
ISP
= V
ISN
= 0V
V
EN/UVLO
= 0V, V
ISP
= V
ISN
= 12V or 0V
V
C
= 1.2V
V
IN
= 4V to 60V
l
l
l
l
l
l
l
l
l
ELECTRICAL CHARACTERISTICS
MIN
97
97
8
8
1.20
0.30
0.20
0
TYP
100
100
10
10
1.25
0.35
0.25
1.8
1.7
23
–10
0
23
–10
0
2000
1.00
0.2
0.2
660
10
10
0
50
50
1
1
60
60
1.1
50
0.25
50
750
10
–10
100
100
12.5
1.25
MAX
103
103
12
12
1.30
0.40
0.30
60
UNITS
mV
mV
mV
mV
V
V
V
V
V
V
µA
µA
µA
µA
µA
µA
µs
V
%
%
µS
nA
MΩ
nA
mV
mV
mV
mV
µA
µA
V
mV
V
mV
mV
%
%
Ω
Ω
µA
µA
0.985
1.015
0.5
0.8
40
10
65
60
FB in Regulation, Current Out of Pin
V
C
= 1.2V, V
LOADEN
= 0V
Buck, V
FB
= 0.8V
Boost, V
FB
= 0.8V
Buck, V
FB
= 0.8V
Boost, V
FB
= 0.8V
V
LSP
= V
LSN
= 12V
V
LSP
= V
LSN
= 12V
Rising
Falling
Hysteresis
V
ISP
= 12V
Rising
Falling
V
EN/UVLO
= 1.1V
V
FB
= 0.4V, V
SS
= 0V
V
FB
= 0.1V, V
SS
= 2V
l
l
–10
35
40
l
l
l
l
1.08
35
0.24
35
8
–12
1.12
65
0.26
65
12
–8
200
200
14.5
1.45
l
l
10.5
1.05
8390fa
4
For more information
www.linear.com/LT8390
LT8390
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 12V, V
EN/UVLO
= 1.5V unless otherwise noted.
PARAMETER
SS Fault Latch-Off Threshold
SS Fault Reset Threshold
Oscillator
RT Pin Voltage
Switching Frequency
SYNC Frequency
SYNC/SPRD Input Bias Current
SYNC/SPRD Threshold Voltage
Highest Spread Spectrum Above Oscillator Frequency
Lowest Spread Spectrum Below Oscillator Frequency
Region Transition
Buck-Boost to Boost (V
IN
/V
OUT
)
Boost to Buck-Boost (V
IN
/V
OUT
)
Buck to Buck-Boost (V
IN
/V
OUT
)
Buck-Boost to Buck (V
IN
/V
OUT
)
Peak-Buck to Peak-Boost (V
IN
/V
OUT
)
Peak-Boost to Peak-Buck (V
IN
/V
OUT
)
NMOS Drivers
TG1, TG2 Gate Driver On-Resistance
Gate Pull-Up
Gate Pull-Down
BG1, BG2 Gate Driver On-Resistance
Gate Pull-Up
Gate Pull-Down
TG1, TG2 Rise Time
TG1, TG2 Fall Time
BG1, BG2 Rise Time
BG1, BG2 Fall Time
TG Off to BG On Delay
BG Off to TG On Delay
TG1 Minimum Duty Cycle in Buck Region
TG1 Maximum Duty Cycle in Buck Region
TG1 Fixed Duty Cycle in Buck-Boost Region
BG2 Fixed Duty Cycle in Buck-Boost Region
BG2 Minimum Duty Cycle in Boost Region
BG2 Maximum Duty Cycle in Boost Region
CONDITIONS
MIN
TYP
1.7
0.2
1.00
200
400
600
0
14.5
–15.7
0.75
0.85
1.18
1.33
0.98
1.02
MAX
UNITS
V
V
V
kHz
kHz
kHz
kHz
µA
V
%
%
ELECTRICAL CHARACTERISTICS
R
T
= 100kΩ
V
SYNC/SPRD
= 0V, R
T
= 226kΩ
V
SYNC/SPRD
= 0V, R
T
= 100kΩ
V
SYNC/SPRD
= 0V, R
T
= 59.0kΩ
V
SYNC/SPRD
= 5V
V
SYNC/SPRD
= 5V
V
SYNC/SPRD
= 5V
l
l
l
190
380
570
150
–0.1
0.4
12.5
–17.7
0.73
0.83
1.16
1.31
0.96
1.00
210
420
630
650
0.1
1.5
16.5
–13.7
0.77
0.87
1.20
1.35
1.00
1.04
V
(BST-SW)
= 5V
V
INTVCC
= 5V
C
L
= 3.3nF, 10% to 90%
C
L
= 3.3nF, 90% to 10%
C
L
= 3.3nF, 10% to 90%
C
L
= 3.3nF, 90% to 10%
C
L
= 3.3nF
C
L
= 3.3nF
Peak-Buck Current Mode
Peak-Buck Current Mode
Peak-Boost Current Mode
Peak-Buck Current Mode
Peak-Boost Current Mode
Peak-Boost Current Mode
2.6
1.4
3.2
1.2
25
20
25
20
60
60
10
95
85
15
10
95
Ω
Ω
Ω
Ω
ns
ns
ns
ns
ns
ns
%
%
%
%
%
%
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 LT8390E is guaranteed to meet performance specifications
from 0°C to 125°C operating 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 LT8390I is guaranteed over the –40°C to 125°C operating junction
temperature range. The LT8390H is guaranteed over the –40°C to 150°C
operating junction temperature range. High junction temperatures degrade
operating lifetimes. Operating lifetime is derated at junction temperatures
greater than 125°C.
Note 3:
The LT8390 includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 150°C when overtemperature protection is active.
Continuous operation above the specified absolute maximum operating
junction temperature may impair device reliability.
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