LTC3577EUFF#PBF Linear Technology, LTC3577EUFF#PBF Datasheet - Page 13

• Manufacturer Part Number: LTC3577EUFF#PBF
• Description: IC PWR MANAGEMENT HANDHELD 44QFN
• Manufacturer: Linear Technology

Specifications of LTC3577EUFF#PBF

• Applications: Handheld/Mobile Devices
• Voltage - Supply: 4.35 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 44-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -

TYPICAL PERFORMANCE CHARACTERISTICS
I
OUT3
100mV/DIV
50mV/DIV
50mV/DIV
0.85
0.84
0.83
0.82
0.81
0.80
0.79
0.78
0.77
0.76
0.75
100
500mA
90
80
70
60
50
40
30
20
10
V
V
V
0
0.01
OUT1
OUT2
OUT3
(AC)
(AC)
(AC)
5mA
0.1
Step-Down Switching Regulator 3
1.2V Output Effi ciency vs I
800mA Step-Down Switching
Regulator Feedback Voltage
vs Output Current
Step-Down Switching Regulator
Output Transient (Burst Mode
Operation)
V
I
V
I
V
V
OPERATION
OUT1
OUT2
Burst Mode
OUT1
OUT2
OUT3
OUT
0.1
PULSE-SKIPPING MODE
= V
= 10mA
= 20mA
= 3.3V
= 1.8V
= 1.2V
1
OUTPUT CURRENT (mA)
BAT
OPERATION
Burst Mode
= 3.8V
1
I
OUT
PULSE-SKIPPING MODE
10
50μs/DIV
(mA)
10
V
100
OUT3
V
V
100
OUT3
IN3
IN3
= 3.8V
= 5V
= 1.2V
3577 G22
3.8V
5V
3577 G28
1000
1000
3577 G25
I
OUT3
100mV/DIV
50mV/DIV
50mV/DIV
0.85
0.84
0.83
0.82
0.81
0.80
0.79
0.78
0.77
0.76
0.75
100
500mA
90
80
70
60
40
30
20
10
50
V
V
V
0
0.01
OUT1
OUT2
OUT3
5mA
(AC)
(AC)
(AC)
0.1
Step-Down Switching Regulator 3
2.5V Output Effi ciency vs I
500mA Step-Down Switching
Regulator Feedback Voltage
vs Output Current
OPERATION
Burst Mode
Step-Down Switching Regulator
Output Transient (Pulse-Skipping
Mode)
V
I
V
I
V
V
OUT1
OUT2
OUT1
OUT2
OUT3
OUT
PULSE-SKIPPING MODE
0.1
= V
= 30mA
= 20mA
= 3.3V
= 1.8V
= 1.2V
1
OUTPUT CURRENT (mA)
BAT
OPERATION
Burst Mode
= 3.8V
1
I
OUT
PULSE-SKIPPING MODE
10
50μs/DIV
(mA)
10
V
100
OUT3
V
V
100
OUT3
IN3
IN3
T
= 2.5V
= 3.8V
= 5V
A
3577 G23
3.8V
5V
3577 G29
= 25°C unless otherwise specifi ed
1000
1000
3577 G26
LTC3577/LTC3577-1
I
OUT1
50mV/DIV
20mV/DIV
100mA
LDO1
LDO2
1500
1400
1300
1200
1100
1000
5mA
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
(AC)
(AC)
0.1
900
800
700
600
500
0
–50
–50
Step-Down Switching Regulator
Short-Circuit Current vs Temperature
Step-Down Switching Regulator
Switch Impedance vs Temperature
LDO Load Step
LDO1 = 1.2V
LDO2 = 2.5V
I
V
V
LDO2
OUT
INX
500mA
NMOS
–25
–25
= 3.2V
= V
= 40mA
BAT
0
TEMPERATURE (°C)
0
= 3.8V
TEMPERATURE (°C)
500mA
800mA BUCK
500mA BUCK
PMOS
25
25
20μs/DIV
800mA NMOS
50
50
800mA PMOS
75
75
V
V
INx
INx
13
100
100
= 3.8V
= 5V
3577 G27
3577 G24
3577 G30
3577fa
125
125