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LT3990HMSE#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
LT3990/LT3990-3.3/LT3990-5
4
3990fa
TYPICAL PERFORMANCE CHARACTERISTICS
LT3990-3.3 Output Voltage LT3990-5 Output Voltage
No-Load Supply Current
No-Load Supply Current
Maximum Load Current Maximum Load Current
Efficiency, V
OUT
= 3.3V Efficiency, V
OUT
= 5V LT3990 Feedback Voltage
T
A
= 25°C, unless otherwise noted.
LOAD CURRENT (mA)
50
EFFICIENCY (%)
60
70
80
90
0.01 101 100
3990 G01
10
20
40
30
0.1
V
IN
= 12V
V
IN
= 48V
FRONT PAGE APPLICATION
V
OUT
= 3.3V
R1 = 1M
R2 = 576k
V
IN
= 24V
V
IN
= 36V
LOAD CURRENT (mA)
50
EFFICIENCY (%)
60
70
80
90
0.01 101 100
3990 G02
20
40
30
0.1
V
IN
= 12V
V
IN
= 48V
FRONT PAGE APPLICATION
V
IN
= 36V
V
IN
= 24V
TEMPERATURE (°C)
–50
FEEDBACK VOLTAGE (V)
1.210
1.215
1.220
25 75 150
3990 G03
1.205
1.200
1.195
–25 0
50
100 125
TEMPERATURE (°C)
–50
OUTPUT VOLTAGE (V)
3.30
3.31
3.32
25 75 150
3990 G04
3.29
3.28
3.27
–25 0
50
100 125
TEMPERATURE (°C)
–50
OUTPUT VOLTAGE (V)
5.00
5.02
5.04
25 75 150
3990 G05
4.98
4.96
4.94
–25 0
50
100 125
INPUT VOLTAGE (V)
5
1.5
SUPPLY LEVEL (µA)
2.0
2.5
3.0
3.5
4.0
15
25 35 45
3990 G06
55
FRONT PAGE APPLICATION
V
OUT
= 3.3V
R1 = 1M
R2 = 576k
LT3990-3.3
TEMPERATURE (°C)
–50
SUPPLY CURRENT (µA)
9
12
15
25 75 150
3990 G07
6
3
0
–25 0
50
100 125
FRONT PAGE APPLICATION
V
IN
= 12V
V
OUT
= 3.3V
R1 = 1M
R2 = 576k
INPUT VOLTAGE (V)
5
350
LOAD CURRENT (mA)
400
450
500
650
600
550
15 25 35 45
3990 G08
55
FRONT PAGE APPLICATION
V
OUT
= 3.3V
TYPICAL
MINIMUM
INPUT VOLTAGE (V)
5
350
LOAD CURRENT (mA)
400
450
500
650
600
550
15 25 35 45
3990 G09
55
FRONT PAGE APPLICATION
V
OUT
= 5V
TYPICAL
MINIMUM
LT3990/LT3990-3.3/LT3990-5
5
3990fa
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum
Switch On-Time/Switch Off-Time
Switch V
CESAT
(I
SW
= 200mA)
vs Temperature Switch V
CESAT
BOOST Pin Current
Switch Current LimitMaximum Load Current Load Regulation
Switch Current Limit Switching Frequency
T
A
= 25°C, unless otherwise noted.
TEMPERATURE (°C)
–50
0
LOAD CURRENT (A)
100
200
300
400
0 50
100
150
3990 G10
500
600
–25 25
75
125
LIMITED BY CURRENT LIMIT
H-GRADE
LIMITED BY MAXIMUM
JUNCTION TEMPERATURE
θ
JA
= 45°C/W
FRONT PAGE APPLICATION
V
IN
= 12V
V
OUT
= 5V
LOAD CURRENT (mA)
0
LOAD REGULATION (%)
0.15
150
3990 G11
0
–0.10
50 100 200
–0.15
–0.20
0.25
0.20
0.10
0.05
–0.05
250 300 350
FRONT PAGE APPLICATION
REFERENCED FROM V
OUT
AT 100mA LOAD
DUTY CYCLE (%)
0
200
SWITCH CURRENT LIMIT (mA)
300
400
500
600
700
800
20 40 60 80
3990 G12
100
SWITCH PEAK
CURRENT LIMIT
CATCH DIODE VALLEY CURRENT LIMIT
TEMPERATURE (°C)
–50
300
SWITCH CURRENT LIMIT (mA)
400
500
600
700
0 50
100
150
3990 G13
800
900
–25 25
75
125
SWITCH PEAK CURRENT LIMIT
CATCH DIODE VALLEY CURRENT LIMIT
TEMPERATURE (°C)
–50
0
FREQUENCY (MHz)
0.4
0.8
1.2
1.6
2.4
–25
0 25 50 75
3990 G14
100 125 150
2.0
0.2
0.6
1.0
1.4
2.2
1.8
TEMPERATURE (°C)
–50
0
SWITCH ON-TIME/SWITCH OFF-TIME (ns)
25
75
100
125
250
175
0
50
75
3990 G15
50
200
225
150
–25 25
100
125
150
LOAD CURRENT = 175mA
MINIMUM ON-TIME
MINIMUM OFF-TIME
TEMPERATURE (°C)
–50
150
SWITCH V
CESAT
(mV)
200
250
300
–25 0 25 50
3990 G16
75 100 125 150
SWITCH CURRENT (mA)
0
0
SWITCH CURRENT V
CESAT
(mV)
100
200
300
400
500
600
100 200 300 400
3990 G17
500
SWITCH CURRENT (mA)
0
15
18
21
400
3990 G18
12
9
100 200 300 500
6
3
0
BOOST PIN CURRENT (mA)
LT3990/LT3990-3.3/LT3990-5
6
3990fa
TYPICAL PERFORMANCE CHARACTERISTICS
Power Good Threshold
EN/UVLO Threshold
Transient Load Response; Load
Current is Stepped from 100mA
to 200mA
Boost Diode Forward Voltage
Catch Diode Forward Voltage Catch Diode Leakage
T
A
= 25°C, unless otherwise noted.
Transient Load Response; Load
Current is Stepped from 10mA
(Burst Mode Operation) to 110mA
Minimum Input Voltage,
V
OUT
= 3.3V
Minimum Input Voltage,
V
OUT
= 5V
LOAD CURRENT (mA)
0 50
2.5
INPUT VOLTAGE (V)
3.5
5.0
100
200
250
3990 G19
3.0
4.5
4.0
150
300
350
TO START
TO RUN
FRONT PAGE APPLICATION
V
OUT
= 3.3V
LOAD CURRENT (mA)
0 50
4.0
INPUT VOLTAGE (V)
5.0
6.5
100
200
250
3990 G20
4.5
6.0
5.5
150
300
350
TO START
TO RUN
FRONT PAGE APPLICATION
f = 600kHz
BOOST DIODE CURRENT (mA)
0
0
BOOST DIODE V
F
(V)
0.2
0.4
0.6
0.8
1.0
1.2
50 100 150 200
3990 G21
–50°C
25°C
125°C
150°C
CATCH DIODE CURRENT (mA)
0
CATCH DIODE, V
F
(V)
0.4
0.6
400
3990 G22
0.2
0
100
200
300
1.0
0.8
–50°C
25°C
125°C
150°C
TEMPERATURE (°C)
–50
CATCH DIODE LEAKAGE (µA)
8
12
15
25 75 150
3990 G23
6
3
0
–25 0
50
100 125
V
R
= 12V
TEMPERATURE (°C)
–50
88
THRESHOLD (%)
89
90
91
92
–25 0 25 50
3990 G24
75 100 125 150
TEMPERATURE (°C)
–50
1.140
THRESHOLD VOLTAGE (V)
1.165
1.190
1.215
1.240
–25 0 25 50
3990 G25
75 100 125 150
V
OUT
100mV/DIV
I
L
100mA/DIV
100µs/DIV
FRONT PAGE APPLICATION
V
IN
= 12V
V
OUT
= 5V
3990 G26
V
OUT
100mV/DIV
I
L
100mA/DIV
100µs/DIV
FRONT PAGE APPLICATION
V
IN
= 12V
V
OUT
= 5V
3990 G27
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LT3990HMSE#PBF

Mfr. #:
Buy LT3990HMSE#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 60V, 350mA Step-Down Regulator with 2uA Quiescent Current and Integrated Diodes in DFN
Lifecycle:
New from this manufacturer.
Delivery:
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