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LTC3555IUFD#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P34
LTC3555/LTC3555-X
7
3555fe
For more information www.linear.com/LTC3555
PowerPath Switching Regulator
Efficiency vs Output Current
V
BUS
Current vs V
BUS
Voltage
(Suspend)
TYPICAL PERFORMANCE CHARACTERISTICS
Ideal Diode V-I Characteristics
Ideal Diode Resistance
vs Battery Voltage
Output Voltage vs Output Current
(Battery Charger Disabled)
USB Limited Battery Charge
Current vs Battery Voltage
USB Limited Battery Charge
Current vs Battery Voltage
Battery Drain Current
vs Battery Voltage
Battery Charging Efficiency vs
Battery Voltage with No External
Load (P
BAT
/P
BUS
)
FORWARD VOLTAGE (V)
0
CURRENT (A)
0.6
0.8
1.0
0.16
3555 G01
0.4
0.2
0
0.04
0.08
0.12
0.20
INTERNAL IDEAL DIODE
WITH SUPPLEMENTAL
EXTERNAL VISHAY
Si2333 PMOS
INTERNAL IDEAL
DIODE ONLY
V
BUS
= 0V
V
BUS
= 5V
BATTERY VOLTAGE (V)
2.7
RESISTANCE (Ω)
0.15
0.20
0.25
3.9
3555 G02
0.10
0.05
0
3.0
3.3
3.6
4.2
INTERNAL IDEAL DIODE
WITH SUPPLEMENTAL
EXTERNAL VISHAY
Si2333 PMOS
INTERNAL IDEAL
DIODE
OUTPUT CURRENT (mA)
0
OUTPUT VOLTAGE (V)
4.00
4.25
4.50
800
3555 G03
3.75
3.50
3.25
200
400
600
1000
BAT = 4V
BAT = 3.4V
V
BUS
= 5V
5x MODE
BATTERY VOLTAGE (V)
2.7
500
600
700
3.9
3555 G04
400
300
3.0 3.3 3.6 4.2
200
100
0
V
BUS
= 5V
R
PROG
= 1k
R
CLPROG
= 3k
LTC3555
5x USB SETTING,
BATTERY CHARGER SET FOR 1A
LTC3555-1/
LTC3555-3
LTC3555-3
BATTERY VOLTAGE (V)
2.7
0
CHARGE CURRENT (mA)
25
50
75
100
125
150
3.0 3.3 3.6 3.9
3555 G05
4.2
LTC3555
1x USB SETTING,
BATTERY CHARGER SET FOR 1A
LTC3555-3
V
BUS
= 5V
R
PROG
= 1k
R
CLPROG
= 3k
LTC3555-1/
LTC3555-3
BATTERY VOLTAGE (V)
2.7
BATTERY CURRENT (µA)
15
20
25
3.9
3555 G06
10
5
0
3.0
3.3
3.6
4.2
V
BUS
= 0V
V
BUS
= 5V
(SUSPEND MODE)
I
VOUT
= 0µA
OUTPUT CURRENT (A)
0.01
40
EFFICIENCY (%)
50
60
70
80
100
0.1 1
3555 G07
90
5x, 10x MODE
1x MODE
BAT = 3.8V
BATTERY VOLTAGE (V)
2.7
EFFICIENCY (%)
80
90
100
3.9
3555 G08
70
60
3.0
3.3
3.6
4.2
1x CHARGING EFFICIENCY
5x CHARGING EFFICIENCY
R
CLPROG
= 3k
R
PROG
= 1k
I
VOUT
= 0mA
LTC3555-3
LTC3555-1/
LTC3555-3
BUS VOLTAGE (V)
0
QUIESCENT CURRENT (µA)
30
40
50
4
3555 G09
20
10
0
1
2
3
5
BAT = 3.8V
I
VOUT
= 0mA
LTC3555/LTC3555-X
8
3555fe
For more information www.linear.com/LTC3555
TYPICAL PERFORMANCE CHARACTERISTICS
Output Voltage vs Load Current in
Suspend
V
BUS
Current vs Load Current in
Suspend
3.3V LDO Output Voltage vs Load
Current, V
BUS
= 0V
Battery Charge Current vs
Temperature
Normalized Battery Charger Float
Voltage vs Temperature
Low-Battery (Instant-On) Output
Voltage vs Temperature
Oscillator Frequency vs
Temperature
V
BUS
Quiescent Current vs
Temperature
V
BUS
Quiescent Current in
Suspend vs Temperature
LOAD CURRENT (mA)
0
OUTPUT VOLTAGE (V)
4.0
4.5
5.0
0.4
3555 G10
3.5
3.0
2.5
0.1
0.2
0.3
0.5
V
BUS
= 5V
BAT = 3.3V
R
CLPROG
= 3k
LOAD CURRENT (mA)
0
V
BUS
CURRENT (mA)
0.3
0.4
0.4
3555 G11
0.2
0.1
0
0.1
0.2
0.3
0.5
V
BUS
= 5V
BAT = 3.3V
R
CLPROG
= 3k
LOAD CURRENT (mA)
0
OUTPUT VOLTAGE (V)
3.0
3.2
20
3555 G12
2.8
2.6
5
10
15
25
3.4
BAT = 3V
BAT = 3.1V
BAT = 3.2V
BAT = 3.3V
BAT = 3.6V
BAT = 3.5V
BAT = 3.4V
BAT = 3.9V, 4.2V
TEMPERATURE (°C)
–40
0
CHARGE CURRENT (mA)
100
200
300
400
0 40
80
120
3555 G13
500
600
–20 20
60
100
THERMAL REGULATION
R
PROG
= 2k
10x MODE
TEMPERATURE (°C)
–40
NORMALIZED FLOAT VOLTAGE
0.998
0.999
1.000
60
3555 G14
0.997
0.996
–15
10
35
85
1.001
TEMPERATURE (°C)
–40
OUTPUT VOLTAGE (V)
3.64
3.66
60
3555 G15
3.62
3.60
–15
10
35
85
3.68
BAT = 2.7V
I
VOUT
= 100mA
5x MODE
TEMPERATURE (°C)
–40
FREQUENCY (MHz)
2.2
2.4
60
3555 G16
2.0
1.8
–15
10
35
85
2.6
V
BUS
= 5V
BAT = 3.6V
V
BUS
= 0V
BAT = 3V
V
BUS
= 0V
BAT = 2.7V
V
BUS
= 0V
TEMPERATURE (°C)
–40
QUIESCENT CURRENT (mA)
9
12
60
3555 G17
6
3
–15
10
35
85
15
V
BUS
= 5V
I
VOUT
= 0µA
5x MODE
1x MODE
TEMPERATURE (°C)
–40
QUIESCENT CURRENT (µA)
50
60
60
3555 G18
40
30
–15
10
35
85
70
I
VOUT
= 0µA
LTC3555/LTC3555-X
9
3555fe
For more information www.linear.com/LTC3555
TYPICAL PERFORMANCE CHARACTERISTICS
RST3, CHRG Pin Current vs
Voltage (Pull-Down State)
3.3V LDO Step Response
(5mA to 15mA)
R
DS(ON)
for Switching Regulator
Power Switches vs Temperature
Switching Regulator Current Limit
vs Temperature
Switching Regulator Low Power
Mode Quiescent Currents
Switching Regulator Soft-Start
Waveform
Battery Drain Current vs
Temperature
Switching Regulators 1, 2 Pulse
Skip Mode Quiescent Currents
Switching Regulator 3 Pulse Skip
Mode Quiescent Currents
RST3, CHRG PIN VOLTAGE (V)
0
RST3, CHRG PIN CURRENT (mA)
60
80
100
4
3555 G19
40
20
0
1
2
3
5
V
BUS
= 5V
BAT = 3.8V
I
LDO3V3
5mA/DIV
0mA
20µs/DIVBAT = 3.8V
3555 G20
V
LDO3V3
20mV/DIV
AC COUPLED
TEMPERATURE (°C)
–40
BATTERY CURRENT (µA)
30
40
50
60
3555 G21
20
10
0
–15
10
35
85
BAT = 3.8V
V
BUS
= 0V
BUCK REGULATORS OFF
TEMPERATURE (°C)
–40
ON-RESISTANCE (Ω)
0.6
0.8
1.0
60
3555 G22
0.4
0.2
0
–15
10
35
85
NMOS SWITCH
NMOS SWITCH
PMOS SWITCH
REGULATORS 1, 2
REGULATOR 3
PMOS SWITCH
TEMPERATURE (°C)
–40
CURRENT LIMIT (A)
1.0
1.5
60
3555 G23
0.5
0
–15
10
35
85
2.0
REGULATOR 3
REGULATORS 1, 2
V
IN1,2,3
= 3.8V
TEMPERATURE (°C)
–40
INPUT CURRENT (µA)
30
40
50
60
3555 G24
20
10
0
–15
10
35
85
V
IN1,2,3
= 3.8V
V
OUT1,2,3
= 2.5V
Burst Mode
OPERATION
LDO MODE
FORCED
Burst Mode
OPERATION
TEMPERATURE (°C)
–40
INPUT CURRENT (µA)
INPUT CURRENT (mA)
275
300
325
60
3555 G25
250
225
200
1.85
1.90
1.95
1.80
1.75
1.70
–15
10
35
85
V
OUT1,2
= 2.5V
(CONSTANT FREQUENCY)
V
OUT1,2
= 1.25V
(PULSE SKIPPING)
V
IN1,2
= 3.8V
TEMPERATURE (°C)
–40
INPUT CURRENT (µA)
INPUT CURRENT (mA)
300
350
60
3555 G26
250
200
–15
10
35
85
400
9
10
8
7
11
V
IN3
= 3.8V
(PULSE
SKIPPING)
V
IN3
= 3.5V
(CONSTANT FREQUENCY)
V
OUT3
= 2.5V
V
OUT
500mV/DIV
50µs/DIV
3555 G27
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P34

LTC3555IUFD#TRPBF

Mfr. #:
Buy LTC3555IUFD#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management Hi Eff USB Pwr Manager + 3x Buck DC/DC
Lifecycle:
New from this manufacturer.
Delivery:
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