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LT8611EUDD#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26
LT8611
4
8611fa
For more information www.linear.com/LT8611
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency at 3.3V
OUT
Efficiency vs Frequency Reference Voltage
EN Pin Thresholds Load Regulation Line Regulation
Efficiency at 5V
OUT
Efficiency at 3.3V
OUT
Efficiency at 5V
OUT
SWITCHING FREQUENCY (MHz)
0.25
90
92
96
1.75
8611 G05
88
86
0.75 1.25 2.25
84
82
94
EFFICIENCY (%)
V
IN
= 12V
V
IN
= 24V
V
OUT
= 3.3V
TEMPERATURE (°C)
–55
0.955
REFERENCE VOLTAGE (V)
0.958
0.964
0.967
0.970
0.985
0.976
5
65
95 125
8611 G06
0.961
0.979
0.982
0.973
–25
35
155
TEMPERATURE (°C)
–55
0.95
EN THRESHOLD (V)
0.96
0.98
0.99
1.00
65
1.04
8611 G07
0.97
5
–25
95 125
35 155
1.01
1.02
1.03
EN RISING
EN FALLING
LOAD CURRENT (A)
0
–0.25
CHANGE IN V
OUT
(%)
–0.15
–0.05
0.05
0.5
1
1.5 2
8611 G08
2.5
0.15
0.25
–0.20
–0.10
0
0.10
0.20
3
V
OUT
= 3.3V
V
IN
= 12V
LOAD CURRENT (A)
0
EFFICIENCY (%)
80
90
100
2
8611 G01
70
60
75
85
95
65
55
50
0.5
1
1.5
2.5
V
IN
= 12V
V
IN
= 24V
f
SW
= 700kHz
LOAD CURRENT (A)
0
EFFICIENCY (%)
80
90
100
2
8611 G02
70
60
75
85
95
65
55
50
0.5
1
1.5
2.5
V
IN
= 12V
V
IN
= 24V
f
SW
= 700kHz
LOAD CURRENT (mA)
0.001
40
EFFICIENCY (%)
50
60
70
80
0.01 0.1 101 100 1000 10000
8611 G03
30
20
10
0
90
100
V
IN
= 12V
V
IN
= 24V
f
SW
= 700MHz
LOAD CURRENT (mA)
0.0010.0001
40
EFFICIENCY (%)
50
60
70
80
0.01 0.1 1 10 100 1000
8611 G04
30
20
10
0
90
100
V
IN
= 12V
V
IN
= 24V
f
SW
= 700MHz
INPUT VOLTAGE (V)
0
CHANGE IN V
OUT
(%)
0.02
0.06
0.10
40
8611 G09
–0.02
–0.06
0
0.04
0.08
–0.04
–0.08
–0.10
105
2015
30 35
45
25
V
OUT
= 3.3V
I
LOAD
= 0.5A
LT8611
5
8611fa
For more information www.linear.com/LT8611
TYPICAL PERFORMANCE CHARACTERISTICS
Top FET Current Limit vs Duty Cycle
Top FET Current Limit
Bottom FET Current Limit
Switch Drop
Minimum On-TimeSwitch Drop
No Load Supply Current No Load Supply Current
Minimum Off-Time
INPUT VOLTAGE (V)
0
0
INPUT CURRENT (µA)
0.5
1.5
2.0
2.5
5.0
3.5
10
20
25 45
8611 G10
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
5
20
15
35
125
155
V
OUT
= 3.3V
V
IN
= 12V
IN REGULATION
TEMPERATURE (°C)
–55
30
MINIMUM ON-TIME (ns)
35
45
50
55
80
65
5
65
95 125
8611 G17
40
70
75
60
–25
35
155
I
LOAD
= 1A, V
SYNC
= 0V
I
LOAD
= 1A, V
SYNC
= 3V
I
LOAD
= 2.5A, V
SYNC
= 0V
I
LOAD
= 2.5A, V
SYNC
= 3V
TEMPERATURE (°C)
–50
MINIMUM OFF-TIME (ns)
95
35
8611 G18
80
70
–25 5 65
65
60
100
90
85
75
95 125 155
V
IN
= 3.3V
I
LOAD
= 0.5A
DUTY CYCLE
0
CURRENT LIMIT (A)
3.5
4.0
4.5
0.6
1.0
8611 G12
3.0
2.5
2.0
0.2 0.4 0.8
5.0
5.5
6.0
TEMPERATURE (°C)
–55
2.5
CURRENT LIMIT (A)
3.0
3.5
4.0
4.5
5.0
–25
5 35 65
8611 G13
95
125
30% DC
70% DC
TEMPERATURE (°C)
–55
2.4
CURRENT LIMIT (A)
2.6
2.8
3.0
3.2
3.6
–25
5 35 65
8611 G14
95
125
3.4
TEMPERATURE (°C)
–55 –25
0
SWITCH DROP (mV)
100
250
5
65
95
8611 G15
50
200
150
35
125
155
TOP SW
BOT SW
SWITCH CURRENT = 1A
SWITCH CURRENT (A)
0
0
SWITCH DROP (mV)
50
150
200
250
2
450
8611 G16
100
1
0.5
2.5
1.5 3
300
350
400
TOP SW
BOT SW
LT8611
6
8611fa
For more information www.linear.com/LT8611
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
8611 G19
200
0
1 2
0.5
1.5 2.5
600
800
300
100
500
700
3
TEMPERATURE (°C)
–55
SWITCHING FREQUENCY (kHz)
730
35
8611 G20
700
680
–25 5 65
670
660
740
R
T
= 60.4k
720
710
690
95 125 155
LOAD CURRENT (mA)
0
SWITCHING FREQUENCY (kHz)
400
500
600
200
8611 G21
300
200
0
50
100
150
100
800
V
IN
= 12V
V
OUT
= 3.3V
700
INPUT VOLTAGE (V)
LOAD CURRENT (mA)
60
80
100
15 25 40
45
8611 G22
40
20
0
5 10
20
30 35
V
OUT
= 5V
f
SW
= 700kHz
FB VOLTAGE (V)
0
SWITCHING FREQUENCY (kHz)
300
400
500
0.6
1
8611 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
8611 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)
2.3
35
8611 G25
2.0
1.8
–25 5 65
1.7
1.6
2.4
2.2
2.1
1.9
95 125
155
V
SS
= 0.5V
TEMPERATURE (°C)
–55
7.0
PG THRESHOLD OFFSET FROM V
REF
(%)
7.5
8.5
9.0
9.5
12.0
10.5
5
65
95 125
8611 G26
8.0
11.0
11.5
10.0
–25
35
155
FB RISING
FB FALLING
TEMPERATURE (°C)
–55
–12.0
PG THRESHOLD OFFSET FROM V
REF
(%)
–11.5
–10.5
–10.0
–9.5
–7.0
–8.5
5
65
95 125
8611 G27
–11.0
–8.0
–7.5
–9.0
–25
35
155
FB RISING
FB FALLING
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LT8611EUDD#PBF

Mfr. #:
Buy LT8611EUDD#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 45V, 2.5A Synchronous Step-Down Regulator with Current Sense and 1.6uA Quiescent Current
Lifecycle:
New from this manufacturer.
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