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LTC3419IMS-1#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LTC3419
4
3419fa
V
IN
(V)
2.5
LEAKAGE CURRENT (nA)
3.0
2.5
1.5
2.0
1.0
0.5
0
4.0 5.0
3419 G07
3.0 3.5 4.5 5.
5
MAIN SWITCH
SYNCHRONOUS
SWITCH
V
IN
(V)
2.5
R
DS(ON)
(Ω)
0.50
0.45
0.35
0.40
0.30
0.25
0.20
4.0 5.0
3419 G08
3.0 3.5 4.5 6.
0
5.5
MAIN SWITCH
SYNCHRONOUS
SWITCH
TEMPERATURE (°C)
–50
V
FB
(% ERROR)
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
25 75
3419 G04
–25 0 50 100 12
5
TEMPERATURE (°C)
–50
FREQUENCY (MHz)
2.6
2.5
2.4
2.3
2.2
2.1
2.0
1.8
1.9
25 75
3419 G05
–25 0 50 100 12
5
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 2.7V
TEMPERATURE (°C)
–50
SUPPLY CURRENT (μA)
55
50
40
45
30
35
20
25
15
25 75
3419 G06
–25 0 50 125100
RUN1 = RUN2 = V
IN
I
LOAD
= 0A
V
IN
= 5.5V
V
IN
= 2.7V
V
IN
(V)
2.5
EFFICIENCY (%)
100
90
70
80
60
40
50
30
4.0 5.0
3419 G03
3.0 3.5 4.5 5.
5
V
OUT
= 1.8V
I
OUT
= 600mA
I
OUT
= 100mA
I
OUT
= 1mA
I
OUT
= 0.1mA
I
OUT
= 10mA
TYPICAL PERFORMANCE CHARACTERISTICS
Burst Mode Operation Pulse Skip Mode Operation Effi ciency vs Input Voltage
Reference Voltage
vs Temperature
Oscillator Frequency
vs Temperature
Supply Current
vs Temperature
Switch Leakage vs Input Voltage
Switch On-Resistance
vs Input Voltage
Switch On-Resistance
vs Temperature
TEMPERATURE (°C)
–50
R
DS(ON)
(Ω)
0.6
0.5
0.4
0.3
0.2
0.1
25 75
3419 G09
–25 0 50 100 125
SYNCHRONOUS SWITCH
MAIN SWITCH
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 25mA
SW
2V/DIV
I
L
100mA/DIV
V
OUT
50mV/DIV
AC-COUPLED
2μs/DIV
3419 G01
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 5mA
SW
2V/DIV
I
L
100mA/DIV
V
OUT
50mV/DIV
AC-COUPLED
5μs/DIV
3419 G02
T
A
= 25°C, V
IN
= 3.6V, unless otherwise noted.
LTC3419
5
3419fa
V
IN
(V)
2.5
V
OUT
ERROR (%)
0.6
0.4
0
0.2
–0.2
–0.4
–0.6
4.0 5.0
3419 G16
3.0 3.5 4.5 5.5
V
OUT
= 1.8V
I
LOAD
= 100mA
OUTPUT CURRENT (mA)
EFFICIENCY (%)
100
90
80
70
60
50
40
30
20
10
0
0.1 10 100 100
0
3419 G10
1
V
OUT
= 1.2V
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
OUTPUT CURRENT (mA)
EFFICIENCY (%)
100
90
80
70
60
50
40
30
20
10
0
0.1 10 100 100
0
3419 G11
1
V
OUT
= 1.8V
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
OUTPUT CURRENT (mA)
EFFICIENCY (%)
100
90
80
70
60
50
40
30
20
10
0
0.1 10 100 100
0
3419 G12
1
V
OUT
= 2.5V
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
TYPICAL PERFORMANCE CHARACTERISTICS
Effi ciency vs Load Current
Effi ciency vs Load Current Effi ciency vs Load Current
Effi ciency vs Load Current
Load Regulation
Load Regulation
Line Regulation
Start-Up from Shutdown
Start-Up from Shutdown
OUTPUT CURRENT (mA)
EFFICIENCY (%)
100
90
80
70
60
50
40
30
20
10
0
0.1 10 100 100
0
3419 G13
1
V
OUT
= 1.8V
PULSE SKIP MODE
Burst Mode OPERATION
LOAD CURRENT (mA)
0
V
OUT
ERROR (%)
3.0
2.5
1.5
2.0
0.5
1.0
–0.5
0
–1.0
300
3419 G14
100 200 400 600500
V
OUT
= 1.2V
V
OUT
= 1.8V
V
OUT
= 2.5V
Burst Mode OPERATION
LOAD CURRENT (mA)
0
V
OUT
ERROR (%)
2.0
1.5
0.5
1.0
–0.5
0
–1.0
300
3419 G15
100 200 400 600500
Burst Mode OPERATION
PULSE SKIP MODE
V
OUT
= 1.8V
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 0A
RUN
2V/DIV
I
L
500mA/DIV
V
OUT
1V/DIV
250μs/DIV
3419 G17
V
IN
= 3.6V
V
OUT
= 1.8V
R
LOAD
= 3Ω
RUN
2V/DIV
I
LOAD
500mA/DIV
V
OUT
1V/DIV
250μs/DIV
3419 G18
T
A
= 25°C, V
IN
= 3.6V, unless otherwise noted.
LTC3419
6
3419fa
TYPICAL PERFORMANCE CHARACTERISTICS
Load Step Load Step Load Step
PIN FUNCTIONS
V
FB1
(Pin 1/Pin 1): Regulator 1 Output Feedback. Receives
the feedback voltage from the external resistive divider
across the regulator 1 output. Nominal voltage for this
pin is 0.6V.
RUN1 (Pin 2/Pin 2): Regulator 1 Enable. Forcing this pin
to V
IN
enables regulator 1, while forcing it to GND causes
regulator 1 to shut down.
MODE (Pin 3/Pin 3): Mode Select Input. To select pulse-
skipping mode, tie to V
IN
. Grounding this pin selects Burst
Mode operation. Do not leave this pin fl oating.
SW1 (Pin 4/Pin 4): Regulator 1 Switch Node Connection
to the Inductor. This pin swings from V
IN
to GND.
V
IN
(Pin 5/Pin 7): Main Power Supply. Must be closely
de-coupled to GND.
SW2 (Pin 6/Pin 8): Regulator 2 Switch Node Connection
to the Inductor. This pin swings from V
IN
to GND.
RUN2 (Pin 7/Pin 9): Regulator 2 Enable. Forcing this pin
to V
IN
enables regulator 2, while forcing it to GND causes
regulator 2 to shut down.
V
FB2
(Pin 8/Pin 10): Regulator 2 Output Feedback. Receives
the feedback voltage from the external resistive divider
across the regulator 2 output. Nominal voltage for this
pin is 0.6V.
Exposed Pad (Pin 9/NA): Ground. The Exposed Pad must
be soldered to PCB for optimal thermal performance.
GND (NA/Pins 5, 6): Ground. Connect to the (–) terminal
of C
OUT
, and the (–) terminal of C
IN
. Pin 5 of the MS
package must be soldered to the PC board for optimal
thermal performance.
(DD/MS)
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 0A TO 600mA
I
LOAD
500mA/DIV
I
L
500mA/DIV
V
OUT
100mV/DIV
AC-COUPLED
20μs/DIV
3419 G19
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 40mA TO 600mA
I
LOAD
500mA/DIV
I
L
500mA/DIV
V
OUT
100mV/DIV
AC-COUPLED
20μs/DIV
3419 G20
V
IN
= 3.6V
V
OUT
= 1.2V
I
LOAD
= 40mA TO 600mA
I
LOAD
500mA/DIV
I
L
500mA/DIV
V
OUT
100mV/DIV
AC-COUPLED
20μs/DIV
3419 G21
T
A
= 25°C, V
IN
= 3.6V, unless otherwise noted.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC3419IMS-1#TRPBF

Mfr. #:
Buy LTC3419IMS-1#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators Dual 600mA, 2.25MHz Synchronous Step-Down
Lifecycle:
New from this manufacturer.
Delivery:
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