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LTC3560IS6#TRMPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LTC3560
4
3560fb
TYPICAL PERFORMANCE CHARACTERISTICS
R
DS(ON
) vs Input Voltage R
DS(ON)
vs Temperature Dynamic Supply Current
Oscillator Frequency
vs Temperature
Oscillator Frequency
vs Supply Voltage Output Voltage vs Load Current
(From Figure 1a Except for the Resistive Divider Resistor Values)
TEMPERATURE (°C)
–50
2.00
OSCILLATOR FREQUENCY (MHz)
2.05
2.15
2.20
2.25
2.50
2.35
0
50
75
3560 G07
2.10
2.40
2.45
2.30
–25
25
100
125
V
IN
= 3.6V
INPUT VOLTAGE (V)
2
1.8
OSCILLATOR FREQUENCY (MHz)
1.9
2.0
2.1
2.2
34
5
6
3560 G08
2.3
2.4
2.5 3.5
4.5
5.5
LOAD CURRENT (mA)
0
1.78
OUTPUT VOLTAGE (V)
1.79
1.80
1.81
1.82
1.84
200
400 600 800
3560 G09
1000 1200
1.83
V
IN
= 3.6V
Burst Mode OPERATION
PULSE SKIP MODE
INPUT VOLTAGE (V)
0
R
DS(0N)
(Ω)
0.30
0.35
0.40
35
3560 G10
0.25
0.20
12
467
0.15
0.10
MAIN SWITCH
SYNCHRONOUS
SWITCH
TEMPERATURE (°C)
–50
R
DS(ON)
()
0.35
25
3560 G11
0.20
0.10
–25 0 50
0.05
0
0.40
0.30
0.25
0.15
75 100 125
SYNCHRONOUS SWITCH
MAIN SWITCH
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
INPUT VOLTAGE (V)
2
0
DYNAMIC SUPPLY CURRENT (µA)
50
100
150
200
34
5
6
3560 G12
250
300
2.5 3.5
4.5
5.5
V
OUT
= 1.2V
I
LOAD
= 0A
PULSE SKIPPING MODE
Burst Mode OPERATION
Effi ciency vs Output Current Effi ciency vs Output Current
Reference Voltage
vs Temperature
OUTPUT CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 10 100 1000
3560 G04
0
1
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
V
OUT
= 1.3V
OUTPUT CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 10 100 1000
3560 G05
0
1
V
IN
= 4.2V
V
IN
= 3.6V
V
OUT
= 1.8V
Burst Mode OPERATION
PULSE SKIP MODE
TEMPERATURE (°C)
–50
REFERENCE VOLTAGE (V)
0.605
0.610
0.615
25 75
3560 G06
0.600
0.595
–25 0
50 100 125
0.590
0.585
V
IN
= 3.6V
LTC3560
5
3560fb
TYPICAL PERFORMANCE CHARACTERISTICS
Load Step Load Step Load Step
Burst Mode Operation Pulse-Skipping Mode Operation Start-Up from Shutdown
Dynamic Supply Current
vs Temperature Switch Leakage vs Temperature Switch Leakage vs Input Voltage
(From Figure 1a Except for the Resistive Divider Resistor Values)
TEMPERATURE (°C)
–50
DYNAMIC SUPPLY CURRENT (µA)
200
250
300
25 75
3560 G13
150
100
–25 0
50 100 125
50
0
V
IN
= 3.6V
V
OUT
= 1.2V
I
LOAD
= 0A
PULSE SKIPPING MODE
Burst Mode OPERATION
TEMPERATURE (°C)
–50
80
100
140
25 75
3560 G14
60
40
–25 0
50 100 125
20
0
120
SWITCH LEAKAGE (nA)
SYNCHRONOUS
SWITCH
MAIN SWITCH
INPUT VOLTAGE (V)
0
0
SWITCH LEAKAGE (pA)
200
400
600
1
2
34
3560 G15
5
800
1000
100
300
500
700
900
6
SYNCHRONOUS
SWITCH
MAIN SWITCH
RUN = 0V
SW
2V/DIV
V
OUT
20mV/DIV
AC COUPLED
I
L
200mA/DIV
2µs/DIV
3560 G16
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 25mA
SW
2V/DIV
V
OUT
20mV/DIV
AC COUPLED
I
L
200mA/DIV
500ns/DIV
3560 G17
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 25mA
RUN
2V/DIV
V
OUT
1V/DIV
I
L
500mA/DIV
500µs/DIV
3560 G18
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 800mA
V
OUT
200mV/DIV
AC COUPLED
I
L
1A/DIV
I
LOAD
1A/DIV
20µs/DIV
3560 G19
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 0A TO 800mA
PULSE SKIPPING MODE
V
OUT
200mV/DIV
AC COUPLED
I
L
1A/DIV
I
LOAD
1A/DIV
20µs/DIV
3560 G20
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 50mA TO 800mA
PULSE SKIPPING MODE
V
OUT
200mV/DIV
AC COUPLED
I
L
1A/DIV
I
LOAD
1A/DIV
20µs/DIV
3560 G21
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 100mA TO 800mA
PULSE SKIPPING MODE
LTC3560
6
3560fb
PIN FUNCTIONS
RUN (Pin 1): Run Control Input. Forcing this pin above 1.5V
enables the part. Forcing this pin below 0.3V shuts down
the device. In shutdown, all functions are disabled drawing
<1µA supply current. Do not leave RUN fl oating.
GND (Pin 2): Ground Pin.
SW (Pin 3): Switch Node Connection to Inductor. This pin
connects to the drains of the internal main and synchronous
power MOSFET switches.
V
IN
(Pin 4): Main Supply Pin. Must be closely decoupled
to GND, Pin 2, with a 10µF or greater ceramic capacitor.
V
FB
(Pin 5): Feedback Pin. Receives the feedback voltage
from an external resistive divider across the output.
SYNC/MODE (Pin 6): External Clock Synchronization and
Mode Select Input. To synchronize with an external clock,
apply a clock with a frequency between 1MHz and 3MHz.
To select pulse-skipping mode, tie to V
IN
. Grounding this
pin selects Burst Mode operation. Do not leave this pin
fl oating.
FUNCTIONAL DIAGRAM
+
–
+
–
+
–
EA
+
–
I
RCMP
+
–
I
COMP
5
1
RUN
OSC
SLOPE
COMP
OSC
FREQ
SHIFT
0.6V
0.6V REF
SHUTDOWN
0.4V
0.65V
SLEEP
V
IN
V
FB
6
SYNC/MODE
EN
BURST
V
IN
RS LATCH
SWITCHING
LOGIC
AND
BLANKING
CIRCUIT
ANTI-
SHOOT-
THRU
S
RQ
Q
5
4
SW
3
GND
3560 BD
2
Load Step Load Step Load Step
V
OUT
200mV/DIV
AC COUPLED
I
L
1A/DIV
I
LOAD
1A/DIV
20µs/DIV
3560 G22
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 0A TO 800mA
Burst Mode OPERATION
V
OUT
200mV/DIV
AC COUPLED
I
L
1A/DIV
I
LOAD
1A/DIV
20µs/DIV
3560 G23
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 50mA TO 800mA
Burst Mode OPERATION
V
OUT
200mV/DIV
AC COUPLED
I
L
1A/DIV
I
LOAD
1A/DIV
20µs/DIV
3560 G24
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 100mA TO 800mA
Burst Mode OPERATION
TYPICAL PERFORMANCE CHARACTERISTICS
(From Figure 1a Except for the Resistive Divider Resistor Values)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC3560IS6#TRMPBF

Mfr. #:
Buy LTC3560IS6#TRMPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 2.25MHz, 800mA Sync Buck Reg in SOT
Lifecycle:
New from this manufacturer.
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