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ManualsBrandsLINEAR TECHNOLOGY ManualsPMICsPMIC - power management - special purpose 16 µA QFN 44 (4x7)
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LTC3675/LTC3675-1
10
36751fc
For more information www.linear.com/LTC3675
Typical perForMance characTerisTics
500mA Buck Regulators,
V
OUT3
vs Temperature
500mA Buck Regulators, PMOS
Current Limit vs Temperature
500mA Buck Regulators, Switch
R
DSON
vs Temperature
Ganged Buck Regulators 1 and 2,
Efficiency vs Load
Boost Regulator,
Efficiency vs Load Boost Regulator, Load Regulation
500mA Buck Regulators Transient
Response (Pulse-Skipping Mode)
500mA Buck Regulators Transient
Response (Burst Mode Operation)
500mA Buck Regulators No Load
Start-Up Transient
(Pulse-Skipping Mode)
T
A
= 25°C, unless otherwise noted.
50µs/DIV
V
OUT3
100mV/DIV
AC-COUPLED
INDUCTOR
CURRENT
100mA/DIV
LOAD STEP = 50mA to 300mA
V
IN
= 3.6V, V
OUT3
= 1.8V
36751 G19
50µs/DIV
V
OUT3
100mV/DIV
AC-COUPLED
INDUCTOR
CURRENT
100mA/DIV
LOAD STEP = 50mA to 300mA
V
IN
= 3.6V, V
OUT3
= 1.8V
36751 G20
25µs/DIV
V
OUT3
500mV/DIV
INDUCTOR
CURRENT
500mA/DIV
EN
2V/DIV
36751 G21
V
IN
= 3.6V
TEMPERATURE (°C)
V
OUT3
(V)
1.90
1.86
1.88
1.82
1.84
1.76
1.74
1.80
1.78
1.72
1.70
–15–35
36751 G22
5 25 65 85 105 125–55 45
V
IN
= 2.7V
PULSE-SKIPPING MODE, LOAD = 250mA
V
IN
= 3.6V
V
IN
= 5.5V
TEMPERATURE (°C)
I
FWD3,4
(A)
1.50
1.30
1.35
1.40
1.45
1.20
1.25
1.05
1.00
1.15
1.10
0.95
0.90
–15–35
36751 G23
5 25 65 85 105 125–55 45
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 5.5V
TEMPERATURE (°C)
R
DSON
(Ω)
1.0
0.8
0.9
0.6
0.7
0.3
0.2
0.5
0.4
0.1
0
–15–35
36751 G24
5 25 65 85 105 125–55 45
NMOS R
DSON
, V
IN
= 2.7V
PMOS R
DSON
, V
IN
= 2.7V
PMOS R
DSON
, V
IN
= 5.5V
NMOS R
DSON
, V
IN
= 5.5V
LOAD CURRENT (mA)
EFFICIENCY (%)
100
90
95
80
85
65
50
75
70
45
60
55
40
10010
36751 G25
1000 100001
PULSE-SKIPPING MODE
Burst Mode OPERATION
V
IN
= 3.6V, V
OUT1
= 1.2V
LOAD CURRENT (mA)
90
80
50
20
70
60
10
40
30
0
10010
36751 G26
10001
V
IN
= 2.7V Burst Mode OPERATION
V
IN
= 3.6V Burst Mode OPERATION
V
IN
= 1.2V Burst Mode OPERATION
V
IN
= 2.7V PWM MODE
V
IN
= 3.6V PWM MODE
V
IN
= 4.2V PWM MODE
V
OUT5
= 5V
LOAD CURRENT (mA)
OUT5
5.05
4.90
5.15
5.10
4.85
5.00
4.95
4.80
10010
36751 G27
10001
PWM MODE
V
IN
= 4.2V
V
IN
= 2.7V
V
IN
= 3.6V