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LTC3404IMS8#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
4
LTC3404
3404fb
OUTPUT CURRENT (mA)
70
EFFICIENCY (%)
80
90
65
75
85
0.1 10 100 1000
3404 G04
60
1
V
IN
= 3V
V
IN
= 6V
V
OUT
= 1.8V
L = 4.7μH
V
IN
= 4.2V
V
IN
= 3.6V
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Oscillator Frequency
vs Temperature
Efficiency vs Output Current
TEMPERATURE (°C)
–50
REFERENCE VOLTAGE (V)
0.814
0.809
0.804
0.799
0.794
0.789
0.784
25 75
3404 G05
–25 0
50 100 125
V
IN
= 3.6V
Oscillator Frequency
vs Supply Voltage
Reference Voltage
vs Temperature
Output Voltage vs Load Current
OUTPUT CURRENT (mA)
80
75
EFFICIENCY (%)
85
90
95
100
0.1 10 100 1000
3404 G4a
70
65
1
V
IN
= 6V
V
IN
= 3.6V
V
OUT
= 3.1V
L = 4.7μH
V
IN
= 4.2V
Efficiency vs Output Current
TEMPERATURE (°C)
–50
FREQUENCY (MHz)
1.55
1.50
1.45
1.40
1.35
1.30
1.25
10075
3404 G06
–25
0
5025
125
V
IN
= 3.6V
SUPPLY VOLTAGE (V)
OSCILLATOR FREQUENCY (MHz)
1.25
1.35
1.30
8
3404 G07
2
4
6
1.55
1.50
1.45
1.40
LOAD CURRENT (mA)
0
1.75
1.76
1.77
OUTPUT VOLTAGE (V)
1.78
1.80
1.81
1.82
200
400
3404 G08
1.79
600
800
1.83
PULSE SKIPPING MODE
V
IN
= 3.6V
L = 4.7μF
Efficiency vs Input Voltage Efficiency vs Output Current Efficiency vs Output Current
INPUT VOLTAGE (V)
2
EFFICIENCY (%)
75
80
5
7
3404 G01
70
60
85
65
34 6
90
95
8
Burst Mode OPERATION
V
OUT
= 2.5V
L = 4.7μH
I
OUT
= 100mA
I
OUT
= 10mA
I
OUT
= 1mA
I
OUT
= 300mA
I
OUT
= 0.1mA
OUTPUT CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 10 100 1000
3404 G02
0
1
V
IN
= 3.6V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 4.2V
PULSE SKIPPING MODE
Burst Mode OPERATION
V
OUT
= 1.8V
L = 4.7μH
OUTPUT CURRENT (mA)
55
EFFICIENCY (%)
65
70
80
90
0.1 10 100 1000
3404 G03
1
75
60
50
85
L = 4.7μH
L = 3.5μH
Burst Mode OPERATION
V
IN
= 6V
V
OUT
= 2.5V
5
LTC3404
3404fb
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Switch Leakage vs Temperature
TEMPERATURE (°C)
–50
SWITCH LEAKAGE (μA)
25
3404 G13
2.0
1.0
–25 0 50
0.5
0
2.5
1.5
75 100 125
MAIN
SWITCH
V
IN
= 7V
RUN = 0V
SYNCHRONOUS
SWITCH
Burst Mode Operation
Switch Leakage vs Input Voltage
INPUT VOLTAGE (V)
0
0
SWITCH LEAKAGE (nA)
0.2
0.4
0.6
0.8
24
6
8
3404 G20
1.0
1.2
13
5
7
SYNCHRONOUS
SWITCH
MAIN
SWITCH
RUN = 0V
Pulse Skipping Mode Operation Start-Up from Shutdown
DC Supply Current
vs Temperature
TEMPERATURE (°C)
–50
300
350
400
450
250
200
150
100
50
0
25 75
3404 G12
–25 0
50 125100
SUPPLY CURRENT (μA)
PULSE SKIPPING
MODE
Burst Mode
OPERATION
V
IN
= 3.6V
V
OUT
= 1.5V
10μs/DIV
V
IN
= 4.2V
V
OUT
= 1.5V
L = 4.7μH
C
IN
= 10μF
C
OUT
= 22μF
I
LOAD
= 30mA
SW
5V/DIV
I
L
200mA/DIV
V
OUT
50mV/DIV
AC
COUPLED
3404 G14
500ns/DIV
V
IN
= 4.2V
V
OUT
= 1.5V
L = 4.7μH
C
IN
= 10μF
C
OUT
= 22μF
I
LOAD
= 30mA
SW
5V/DIV
I
L
100mA/DIV
V
OUT
10mV/DIV
3404 G15
40μs/DIV
V
IN
= 3.6V
V
OUT
= 1.5V
L = 4.7μH
C
IN
= 10μF
C
OUT
= 22μF
I
LOAD
= 500mA
RUN
2V/DIV
I
L
500mA/DIV
V
OUT
1V/DIV
3404 G16
INPUT VOLTAGE (V)
10
R
DS(ON)
(Ω)
0.5
0.6
0.7
5678
3404 G09
0.4
0.3
0
0.1
2
3
4
0.2
0.9
0.8
SYNCHRONOUS
SWITCH
MAIN
SWITCH
R
DS(ON)
vs Input Voltage
R
DS(ON)
vs Temperature
DC Supply Current
vs Input Voltage
TEMPERATURE (°C)
–50 –25
0.3
R
DS(ON)
(Ω)
0.4
0.6
0.7
0.8
75 100
1.2
3404 G10
0.5
0 25 50 125
0.9
1.0
1.1
V
IN
= 3V
V
IN
= 5V
SYNCHRONOUS SWITCH
MAIN SWITCH
INPUT VOLTAGE (V)
0
DC SUPPLY CURRENT (μA)
200
500
2
4
5
3404 G11
100
400
300
250
150
50
450
350
3
6
78
V
OUT
= 1.8V
PULSE SKIPPING
MODE
Burst Mode
OPERATION
6
LTC3404
3404fb
RUN (Pin 1): Run Control Input. Forcing this pin below
0.4V shuts down the LTC3404. In shutdown all functions
are disabled drawing <1μA supply current. Forcing this
pin above 1.2V enables the LTC3404. Do not leave RUN
floating.
I
TH
(Pin 2): Error Amplifier Compensation Point. The
current comparator threshold increases with this control
voltage. Nominal voltage range for this pin is from 0.5V
to 1.9V.
V
FB
(Pin 3): Feedback Pin. Receives the feedback voltage
from an external resistive divider across the output.
GND (Pin 4): Ground Pin.
SW (Pin 5): Switch Node Connection to Inductor. This pin
connects to the drains of the internal main and synchro-
nous power MOSFET switches.
V
IN
(Pin 6): Main Supply Pin. Must be closely decoupled
to GND, Pin 4.
SYNC/MODE (Pin 7): External Clock Synchronization and
Mode Select Input. To synchronize with an external clock,
apply a clock with a frequency between 1MHz and 1.7MHz.
To select Burst Mode operation, tie to V
IN
. Grounding this
pin selects pulse skipping mode. Do not leave this pin
floating.
PLL LPF (Pin 8): Output of the Phase Detector and Control
Input of Oscillator. Connect a series RC lowpass network
from this pin to ground if externally synchronized. If
unused, this pin may be left open.
UU
U
PI FU CTIO S
Load Step Response
Load Step Response Load Step Response
40μs/DIV
V
IN
= 3.6V
V
OUT
= 1.5V
L = 4.7μH
C
IN
= 10μF
C
OUT
= 22μF
I
LOAD
= 200mA TO 500mA
PULSE SKIPPING MODE
V
OUT
100mV/DIV
I
L
500mA/DIV
I
TH
1V/DIV
3404 G17
40μs/DIV
V
IN
= 3.6V
V
OUT
= 1.5V
L = 4.7μH
C
IN
= 10μF
C
OUT
= 22μF
I
LOAD
= 50mA TO 500mA
PULSE SKIPPING MODE
V
OUT
100mV/DIV
I
L
500mA/DIV
I
TH
1V/DIV
3404 G18
40μs/DIV
V
IN
= 3.6V
V
OUT
= 1.5V
L = 4.7μH
C
IN
= 10μF
C
OUT
= 22μF
I
LOAD
= 50mA TO 500mA
Burst Mode OPERATION
V
OUT
100mV/DIV
I
L
500mA/DIV
I
TH
1V/DIV
3404 G19
TYPICAL PERFOR A CE CHARACTERISTICS
UW
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC3404IMS8#TRPBF

Mfr. #:
Buy LTC3404IMS8#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 1.4MHz Hi Eff Mono Sync Buck Reg
Lifecycle:
New from this manufacturer.
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