OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

LTC3778EF#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
4
LTC3778
3778f
Efficiency vs Load Current
Efficiency vs Input Voltage Frequency vs Input Voltage
Load Regulation
I
TH
Voltage vs Load Current
Current Sense Threshold
vs I
TH
Voltage
Transient Response
(Discontinuous Mode)
Transient Response
V
OUT
50mV/DIV
I
L
5A/DIV
20µs/DIV
3778 G01
LOAD STEP 0A TO 10A
V
IN
= 15V
V
OUT
= 2.5V
FCB = 0V
FIGURE 1 CIRCUIT
20µs/DIV
3778 G02
LOAD STEP 1A TO 10A
V
IN
= 15V
V
OUT
= 2.5V
FCB = INTV
CC
FIGURE 1 CIRCUIT
Start-Up
50ms/DIV 3778 G19
V
IN
= 15V
V
OUT
= 2.5V
R
LOAD
= 0.125Ω
TYPICAL PERFOR A CE CHARACTERISTICS
UW
V
OUT
50mV/DIV
I
L
5A/DIV
RUN/SS
2V/DIV
I
L
5A/DIV
V
OUT
1V/DIV
LOAD CURRENT (A)
0.001
EFFICIENCY (%)
70
80
10
3778 G03
60
50
0.01
0.1
1
100
90
DISCONTINUOUS
MODE
CONTINUOUS
MODE
V
IN
= 10V
V
OUT
= 2.5V
EXTV
CC
= 5V
FIGURE 1 CIRCUIT
INPUT VOLTAGE (V)
0
80
EFFICIENCY (%)
85
90
95
100
5101520
3778 G04
25 30
I
LOAD
= 1A
I
LOAD
= 10A
FCB = 5V
FIGURE 1 CIRCUIT
INPUT VOLTAGE (V)
5
FREQUENCY (kHz)
240
260
25
3778 G05
220
200
10
15
20
300
280
I
OUT
= 10A
FCB = 0V
FIGURE 1 CIRCUIT
I
OUT
= 0A
LOAD CURRENT (A)
0
∆V
OUT
(%)
–0.2
–0.1
8
3778 G06
–0.3
–0.4
2
4
6
10
0
FIGURE 1 CIRCUIT
LOAD CURRENT (A)
0
I
TH
VOLTAGE (V)
1.0
1.5
3778 G07
0.5
0
5
10
15
2.5
2.0
CONTINUOUS
MODE
DISCONTINUOUS
MODE
FIGURE 1 CIRCUIT
V
RNG
= 1V
I
TH
VOLTAGE (V)
0
–200
CURRENT SENSE THRESHOLD (mV)
–100
0
100
200
300
0.5
1.0 1.5 2.0
3778 G08
2.5 3.0
V
RNG
=
1V
0.7V
0.5V
1.4V
2V
5
LTC3778
3778f
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Maximum Current Sense
Threshold vs Temperature
Maximum Current Sense
Threshold vs V
RNG
Voltage
Feedback Reference Voltage
vs Temperature Error Amplifier g
m
vs Temperature
Current Limit Foldback
On-Time vs I
ON
Current On-Time vs V
ON
Voltage On-Time vs Temperature
Maximum Current Sense
Threshold vs RUN/SS Voltage
I
ON
CURRENT (µA)
1
10
ON-TIME (ns)
100
1k
10k
10 100
3778 G20
V
VON
= 0V
V
ON
VOLTAGE (V)
0
ON-TIME (ns)
400
600
3778 G21
200
0
1
2
3
1000
I
ION
= 30µA
800
TEMPERATURE (°C)
–50
ON-TIME (ns)
200
250
300
25 75
3778 G22
150
100
–25 0
50 100 125
50
0
I
ION
= 30µA
V
ON
= 0V
V
FB
(V)
0
0
MAXIMUM CURRENT SENSE THRESHOLD (mV)
25
50
75
100
125
150
V
RNG
= 1V
0.15 0.30 0.45 0.60
3778 G09
V
RNG
VOLTAGE (V)
0.5
0
MAXIMUM CURRENT SENSE THRESHOLD (mV)
50
100
150
200
300
0.75
1.0 1.25 1.5
3778 G10
1.75 2.0
250
RUN/SS VOLTAGE (V)
1.5
0
MAXIMUM CURRENT SENSE THRESHOLD (mV)
25
50
75
100
125
150
V
RNG
= 1V
2 2.5 3 3.5
3778 G23
TEMPERATURE (°C)
–50 –25
100
MAXIMUM CURRENT SENSE THRESHOLD (mV)
120
150
0
50
75
3778 G11
110
140
130
25
100
125
V
RNG
= 1V
TEMPERATURE (°C)
–50
0.58
FEEDBACK REFERENCE VOLTAGE (V)
0.59
0.60
0.61
0.62
–25 0 25 50
3778 G12
75 100 125
TEMPERATURE (°C)
–50 –25
1.0
g
m
(mS)
1.4
2.0
0
50
75
3778 G13
1.2
1.8
1.6
25
100
125
6
LTC3778
3778f
FCB Pin Current vs Temperature
RUN/SS Pin Current
vs Temperature
RUN/SS Latchoff Thresholds
vs Temperature
Undervoltage Lockout Threshold
vs Temperature
EXTV
CC
Switch Resistance
vs Temperature
Input and Shutdown Currents
vs Input Voltage
INTV
CC
Load Regulation
INPUT VOLTAGE (V)
0
INPUT CURRENT (µA)
SHUTDOWN CURRENT (µA)
800
1000
1200
15 25
3778 G24
600
400
510
20 30 35
200
0
30
40
60
50
20
10
0
EXTV
CC
OPEN
EXTV
CC
= 5V
SHUTDOWN
INTV
CC
LOAD CURRENT (mA)
0
∆INTV
CC
(%)
–0.2
–0.1
0
40
3778 G25
–0.3
–0.4
–0.5
10
20
30
50
TEMPERATURE (°C)
–50 –25
0
EXTV
CC
SWITCH RESISTANCE (Ω)
4
10
0
50
75
3778 G14
2
8
6
25
100
125
TEMPERATURE (°C)
–50
FCB PIN CURRENT (µA)
–0.50
–0.25
0
25 75
3778 G15
–0.75
–1.00
–25 0
50 100 125
–1.25
–1.50
TEMPERATURE (°C)
–50 –25
–2
RUN/SS PIN CURRENT (µA)
0
3
0
50
75
3778 G16
–1
2
1
25
100
125
PULL-UP CURRENT
PULL-DOWN CURRENT
TEMPERATURE (°C)
–50
3.0
RUN/SS THRESHOLD (V)
3.5
4.0
4.5
5.0
–25 0 25 50
3778 G17
75 100 125
LATCHOFF ENABLE
LATCHOFF THRESHOLD
TEMPERATURE (C)
–50
2.0
UNDERVOLTAGE LOCKOUT THRESHOLD (V)
2.5
3.0
3.5
4.0
–25 0 25 50
3778 G18
75 100 125
TYPICAL PERFOR A CE CHARACTERISTICS
UW
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24

LTC3778EF#TRPBF

Mfr. #:
Buy LTC3778EF#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators Wide Operating Rng, No RSENSE Buck Cntr
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet