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LT3682EDD#PBF

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LT3682
4
3682f
TYPICAL PERFORMANCE CHARACTERISTICS
LOAD CURRENT (mA)
0.1
EFFICIENCY (%)
60
70
40
50
80
1000
3682 G01
30
10
20
1
10
100
90
V
IN
= 12V
V
IN
= 34V
V
IN
= 24V
L = 10µH
f = 800kHz
LOAD CURRENT (mA)
EFFICIENCY (%)
3682 G02
0.1
60
70
40
50
80
1000
30
10
20
1
10
100
90
V
IN
= 12V
V
IN
= 34V
V
IN
= 24V
L = 10µH
f = 800kHz
LOAD CURRENT (mA)
0.1
EFFICIENCY (%)
POWER LOSS(W)
70
60
80
90
1000
3682 G03
20
30
40
50
10
1
10
100
100
0.1
0.01
0.001
1
V
IN
= 12V
V
OUT
= 3.3V
L = 10µH
f = 800kHz
INPUT VOLTAGE(V)
0
SUPPLY CURRENT (µA)
80
60
100
40
3682 G04
20
40
0
5
10
15 20 30 3525
120
V
OUT
= 3.3V
TEMPERATURE(°C)
50
SUPPLY CURRENT (µA)
700
600
500
800
900
3682 G05
400
300
200
100
0
25
0
25 50 100 12575
1000
CATCH DIODE: DIODES, INC. B150
V
IN
= 12V
V
OUT
= 3.3V
INCREASED SUPPLY CURRENT
DUE TO CATCH DIODE LEAKAGE
AT HIGH TEMPERATURE
INPUT VOLTAGE (V)
05
LOAD CURRENT (A)
1.25
1
0.75
1.5
40
3682 G06
0.5
0.25
10
15
20 30 3525
1.75
TYPICAL
MINIMUM
V
OUT
= 3.3V
L = 10µH
f = 800kHz
SYNC = 0V
SYNC = 3.3V
INPUT VOLTAGE (V)
5
LOAD CURRENT (A)
1
0.75
1.25
40
3682 G07
0.5
0.25
10
15
20 30 3525
1.5
TYPICAL
MINIMUM
V
OUT
= 5V
L = 10µH
f = 800kHz
SYNC = 0V
SYNC = 5V
INPUT VOLTAGE (V)
8
LOAD CURRENT (A)
1
1.25
20
3682 G08
0.5
0.75
0.25
10
12
14 16 18
1.5
TYPICAL
MINIMUM
V
OUT
= 5V
L = 4.7µH
f = 2MHz
SYNC = 0V
SYNC = 5V
INPUT VOLTAGE (V)
0
LOAD CURRENT (A)
1.5
1.25
1.75
40
3682 G09
1
0.75
0.50
0.25
5
10
15 20 30 3525
TYPICAL
MINIMUM
V
OUT
= 1.8V
L = 10µH
f = 500kHz
SYNC = 0V
SYNC = 3.3V
No Load Supply Current No Load Supply Current Maximum Load Current
Maximum Load Current Maximum Load Current Maximum Load Current
Effi ciency (V
OUT
= 5V, SYNC = 0V) Effi ciency (V
OUT
= 3.3V, SYNC = 0V) Effi ciency (V
OUT
= 3.3V, SYNC = 0V)
T
A
= 25°C, unless otherwise noted.
LT3682
5
3682f
DUTY CYCLE (%)
0
SWITCH CURRENT LIMIT (A)
1.3
1.1
1.5
1.7
100
3682 G10
0.7
0.9
0.5
20
40
60 80
1.9
SYNC < 0.3V
SYNC > 0.8V
OR CLOCKED
TEMPERATURE (°C)
50
SWITCH CURRENT LIMIT (A)
1.3
1.1
0.9
1.7
1.5
125
3682 G11
0.7
0.5
25
0
25 75 10050
1.9
DC = 90%
DC = 10%
SWITCH CURRENT (A)
0
VOLTAGE DROP (mV)
400
500
300
600
1.25
3682 G12
100
200
0
0.25
0.5
0.75 1
700
SWITCH CURRENT (A)
0
BOOST PIN CURRENT (mA)
20
25
15
10
30
1.25
3682 G13
5
0
0.25
0.5
0.75 1
35
TEMPERATURE(°C)
50
FEEDBACK VOLTAGE (mV)
800
3682 G14
790
780
770
25
0 25 50 100 12575
810
TEMPERATURE(°C)
50
FREQUENCY (MHz)
1.05
1.10
1.15
3682 G15
1
0.95
0.90
0.85
0.80
25
0 25 50 100 12575
1.20
R
RT
= 29.4k
FB PIN VOLTAGE (mV)
0
FREQUENCY (kHz)
1000
900
3682 G16
800
600
400
200
0
100 200 300 400 600 700 800500
1200
R
RT
= 29.4k
TEMPERATURE (°C)
MINIMUM SWITCH ON TIME (ns)
100
80
120
3682 G17
40
20
60
0
50 25
0 25 50 100 12575
RUN/SS PIN VOLTAGE (V)
0
SWITCH CURRENT LIMIT (A)
1.4
0.8
1
1.2
1.6
1.8
3.5
3682 G18
0.4
0.2
0.6
0
0.5
1 1.5 2 32.5
2
Boost Pin Current Feedback Voltage Switching Frequency
Frequency Foldback Minimum Switch On-Time Soft-Start
Switch Current Limit
Switch Current Limit
(SYNC Pin Grounded) Switch Voltage Drop
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, unless otherwise noted.
LT3682
6
3682f
RUN/SS PIN VOLTAGE (V)
0
RUN/SS PIN CURRENT (µA)
10
8
35 40
3682 G19
4
2
6
0
5
10 15 20 3025
12
BOOST DIODE CURRENT (A)
0
BOOST DIODE V
f
(V)
1
0.8
1.2
1
3682 G20
0.4
0.2
0.6
0
0.25
0.5 0.75
1.4
FB PIN ERROR VOLTAGE (mV)
200
V
C
PIN CURRENT (µA)
0
10
20
30
10
40
50
200
3682 G21
40
30
50
20
60
100
0 100
60
LOAD CURRENT (mA)
1
INPUT VOLTAGE (V)
4
3.5
4.5
1000
3682 G22
2.5
3
2
10 100
5
V
OUT
= 3.3V
L = 10µH
f = 800kHz
LOAD CURRENT (mA)
1
INPUT VOLTAGE (V)
5.5
5
6
1000
3682 G23
4.5
4
10 100
6.5
V
OUT
= 5V
L = 10µH
f = 800kHz
LOAD CURRENT(A)
0
V
IN
(V)
30
35
1
3682 G24
20
25
15
10
5
0.1
0.2
0.3 0.4 0.5 0.7 0.90.80.6
40
T
A
= 85˚C
T
A
= 25˚C
V
OUT
= 3.3V
L = 10µH
f = 800kHz
SYNC = 3.3V
LOAD CURRENT(A)
V
IN
(V)
3682 G25
0
30
35
1
20
25
15
10
5
0.1
0.2
0.3 0.4 0.5 0.7 0.90.80.6
40
T
A
= 85˚C
T
A
= 25˚C
V
OUT
= 5V
L = 10µH
f = 800kHz
SYNC = 5V
LOAD CURRENT(A)
V
IN
(V)
3682 G26
0
30
35
1
20
25
15
10
5
0.1
0.2
0.3 0.4 0.5 0.7 0.90.80.6
40
T
A
= 85˚C
T
A
= 25˚C
V
OUT
= 5V
L = 4.7µH
f = 2MHz
SYNC =5V
TEMPERATURE(°C)
V
C
VOLTAGE (V)
1.5
1
2
3682 G27
0.5
0
2.5
50 25
0 25 50 100 12575
SWITCHING THRESHOLD
CURRENT LIMIT CLAMP
Minimum Input Voltage Minimum Input Voltage Maximum V
IN
for Full Frequency
Maximum V
IN
for Full Frequency Maximum V
IN
for Full Frequency V
C
Voltages
RUN/SS Pin Current Boost Diode Forward Voltage Error Amplifi er Output Current
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, unless otherwise noted.
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LT3682EDD#PBF

Mfr. #:
Buy LT3682EDD#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 1A uP Buck Sw Reg
Lifecycle:
New from this manufacturer.
Delivery:
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