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LT8614IUDC#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
LT8614
4
8614fc
For more information www.linear.com/LT8614
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency at 3.3V
OUT
Efficiency vs Frequency
Burst Mode Efficiency
vs Inductor Value
Reference Voltage
EN Pin Thresholds Load Regulation
Efficiency at 5V
OUT
Efficiency at 3.3V
OUT
Efficiency at 5V
OUT
LOAD CURRENT (A)
0
50
EFFICIENCY (%)
55
65
70
75
100
85
1
2
2.5
8614 G01
60
90
95
80
0.5 1.5
3
3.5
4
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
f
SW
= 1MHz
L = 4.7µH
LOAD CURRENT (A)
0
50
EFFICIENCY (%)
55
65
70
75
100
85
1
2
8614 G02
60
90
95
80
3
0.5 1.5
2.5
3.5
4
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
f
SW
= 1MHz
L = 2.2µH
LOAD CURRENT (mA)
0.01 0.1
40
EFFICIENCY (%)
50
60
70
80
1 10 100 1000
8614 G03
30
20
10
0
90
100
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
f
SW
= 1MHz
L = 4.7µH
LOAD CURRENT (mA)
0.01 0.1
40
EFFICIENCY (%)
50
60
70
80
1 10 100 1000
8614 G04
30
20
10
0
90
100
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
f
SW
= 1MHz
L = 4.7µH
SWITCHING FREQUENCY (MHz)
0.25
98
96
94
92
90
88
86
84
1.75 2.75
8614 G05
0.75 1.25
2.25
EFFICIENCY (%)
V
OUT
= 5V
I
LOAD
= 1A
L = 8.6µH
V
IN
= 12V
V
IN
= 24V
INDUCTOR VALUE (µH)
0
65
EFFICIENCY (%)
70
75
80
85
90
95
2 4 6 8
8614 G06
10
V
OUT
= 5V
I
LOAD
= 10mA
V
IN
= 12V
V
IN
= 24V
TEMPERATURE (°C)
–50
REFERENCE VOLAGE (V)
0.971
0.973
0.975
150
8614 G07
0.969
0.967
0.965
0.961
0
50
100
–25
25
75
125
0.963
0.979
0.977
TEMPERATURE (°C)
–50
EN THRESHOLD (V)
0.99
1.01
150
8614 G08
0.97
0.95
0
50
100
–25
25
75
125
1.03
0.98
1.00
0.96
1.02
EN RISING
EN FALLING
LOAD CURRENT (A)
0
–0.15
CHANGE IN V
OUT
(%)
–0.10
–0.05
0
0.05
1 2
3
4
8614 G09
0.10
0.15
0.5 1.5
2.5
3.5
V
OUT
= 5V
V
IN
= 12V
LT8614
5
8614fc
For more information www.linear.com/LT8614
TYPICAL PERFORMANCE CHARACTERISTICS
Top FET Current Limit vs Duty Cycle
Top FET Current Limit Bottom FET Current Limit
Switch Drop
Minimum On-TimeSwitch Drop
Line Regulation
No-Load Supply Current No-Load Supply Current
INPUT VOLTAGE (V)
5
–0.10
CHANGE IN V
OUT
(%)
–0.08
–0.04
–0.02
0
0.10
0.04
15
25
30
8614 G10
–0.06
0.06
0.08
0.02
10 20
35
40
45
V
OUT
= 5V
I
LOAD
= 1A
INPUT VOLTAGE (V)
0
0
INPUT CURRENT (µA)
0.5
1.5
2.0
2.5
5.0
3.5
10
20
25 45
8614 G11
1.0
4.0
4.5
3.0
5 15
30
35
40
V
OUT
= 3.3V
IN REGULATION
TEMPERATURE (°C)
–55 –25
0
INPUT CURRENT (µA)
10
25
5
65
95
8614 G12
5
20
15
35
125
155
V
OUT
= 3.3V
V
IN
= 12V
IN REGULATION
TEMPERATURE (°C)
–50
CURRENT LIMIT (A)
6.0
6.5
7.0
100 12525 50 75
5.5
5.0
–25 0 150
4.5
4.0
7.5
DUTY CYCLE
0
6.0
CURRENT LIMIT (A)
6.5
7.0
7.5
8.0
8.5
9.0
0.2 0.4 0.6 0.8
8614 G13
1.0
TEMPERATURE (°C)
–50
6.0
CURRENT LIMIT (A)
6.5
7.5
8.0
8.5
9.5
–25
75
125
8614 G14
7.0
9.0
50
150
0
25
100
5% DC
TEMPERATURE (°C)
–50
SWITCH DROP (mV)
100
150
150
8614 G16
50
0
0
50
100
–25
25
75
125
200
75
125
25
175
SWITCH CURRENT = 1A
TOP SWITCH
BOTTOM SWITCH
SWITCH CURRENT (A)
0
0
SWITCH DROP (mV)
50
150
200
250
500
350
1
2
8614 G17
100
400
450
300
3
4
TOP SWITCH
BOTTOM SWITCH
TEMPERATURE (°C)
–50
20
MINIMUM ON-TIME (ms)
22
26
28
30
40
34
0
50
75 100
8614 G18
24
36
38
32
–25
25
125
I
LOAD
= 1A, V
SYNC
= 0V
I
LOAD
= 1A, V
SYNC
= 3V
I
LOAD
= 2A
I
LOAD
= 4A
LT8614
6
8614fc
For more information www.linear.com/LT8614
TYPICAL PERFORMANCE CHARACTERISTICS
Dropout Voltage Switching Frequency Burst Frequency
Frequency Foldback
Minimum Load to Full Frequency
(SYNC DC High) Soft-Start Tracking
Soft-Start Current
PG High Thresholds
PG Low Thresholds
LOAD CURRENT (A)
0
DROPOUT VOLTAGE (mV)
400
600
4
8614 G19
200
0
1
2
3
0.5
1.5
2.5
3.5
800
300
500
100
700
TEMPERATURE (°C)
–50
SWITCHING FREQUENCY (kHz)
730
25
8614 G20
700
680
–25 0 50
670
660
740
R
T
= 60.4k
720
710
690
75 100 150125
LOAD CURRENT (mA)
0
0
SWITCHING FREQUENCY (kHz)
200
400
600
800
1000
1200
50 100 150 200
8614 G21
FRONT PAGE APPLICATION
V
IN
= 12V
V
OUT
= 5V
INPUT VOLTAGE (V)
5
LOAD CURRENT (mA)
60
80
100
20 30 45
8614 G22
40
20
0
10 15
25
35 40
FRONT PAGE APPLICATION
V
OUT
= 5V
f
SW
= 1MHz
FB VOLTAGE (V)
0
SWITCHING FREQUENCY (kHz)
300
400
500
0.6
1
8614 G23
200
100
0
0.2 0.4 0.8
600
700
800
V
OUT
= 3.3V
V
IN
= 12V
V
SYNC
= 0V
R
T
= 60.4k
TR/SS VOLTAGE (V)
0
FB VOLTAGE (V)
0.8
1.0
1.2
0.6 1.0
8614 G24
0.6
0.4
0.2 0.4
0.8 1.2 1.4
0.2
0
TEMPERATURE (°C)
–50
SS PIN CURRENT (µA)
2.2
2.4
150
8614 G25
2.0
1.8
0
50
100
–25
25
75
125
2.6
2.1
2.3
1.9
2.5
V
SS
= 0.5V
TEMPERATURE (°C)
–50
7.0
PG THRESHOLD OFFSET FROM V
REF
(%)
7.5
8.5
9.0
9.5
12.0
10.5
0
50
75 100
8614 G26
8.0
11.0
11.5
10.0
–25
25
150125
FB RISING
FB FALLING
TEMPERATURE (°C)
–50
–12.0
PG THRESHOLD OFFSET FROM V
REF
(%)
–11.5
–10.5
–10.0
–9.5
–7.0
–8.5
0
50
75 100 125
8614 G27
–11.0
–8.0
–7.5
–9.0
–25
25
150
FB RISING
FB FALLING
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LT8614IUDC#PBF

Mfr. #:
Buy LT8614IUDC#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 42V, 4A Synchronous Step-Down SILENT SWITCHER with 2.5 A Quiescent Current
Lifecycle:
New from this manufacturer.
Delivery:
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