LTC3412 LINER [Linear Technology], LTC3412 Datasheet - Page 3

• Manufacturer Part Number: LTC3412
• Description: 2.5A, 4MHz, Monolithic Synchronous Step-Down Regulator
• Manufacturer: LINER [Linear Technology]

temperature range, otherwise specifications are at T
SYMBOL
f
f
R
R
I
V
I
V
I
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3412E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the – 40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3412I is guaranteed to meet
specified performance over the – 40°C to 85°C temperature range.
ELECTRICAL CHARACTERISTICS
TYPICAL PERFOR A CE CHARACTERISTICS
OSC
SYNC
LIMIT
LSW
RUN
UVLO
RUN
PFET
NFET
100
80
60
40
20
0
0.001
Efficiency vs Load Current
0.01
LOAD CURRENT (A)
FORCED CONTINUOUS
PARAMETER
Switching Frequency
Switching Frequency Range
SYNC Capture Range
R
R
Peak Current Limit
Undervoltage Lockout Threshold
SW Leakage Current
RUN Threshold
RUN/SS Leakage Current
DS(ON)
DS(ON)
Burst Mode OPERATION
0.1
of P-Channel FET
of N-Channel FET
V
V
1
IN
OUT
W
= 3.3V
= 2.5V
3412 G01
U
10
100
90
80
70
60
50
40
30
20
10
0
0.001
A
Efficiency vs Load Current
V
1MHz
Burst Mode OPERATION
= 25°C. V
OUT
CONDITIONS
R
(Note 6)
(Note 6)
I
I
V
SW
SW
RUN
OSC
= 2.5V
The
= 1A (Note 7)
= –1A (Note 7)
0.01
= 309kΩ
= 0V, V
V
LOAD CURRENT (A)
IN
●
IN
= 3.3V
denotes the specifications which apply over the full operating
= 3.3V unless otherwise specified.
IN
0.1
= 5.5V
Note 3: The LTC3412 is tested in a feedback loop that adjusts V
achieve a specified error amplifier output voltage (I
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5: T
dissipation as follows: LTC3412: T
Note 6: 4MHz operation is guaranteed by design and not production tested.
Note 7: Switch on resistance is guaranteed by design and test correlation
in the UF package and by production test in the FE package.
V
IN
= 5V
1
J
is calculated from the ambient temperature T
3412 G02
10
100
90
80
70
60
50
40
30
20
10
0
0.001
Efficiency vs Load Current
J
= T
2.375
0.88
MIN
0.3
0.3
0.5
V
4
A
IN
+ P
= 3.3V
0.01
D
LOAD CURRENT (A)
(37.6°C/W).
2.500
0.95
0.65
TYP
5.4
0.1
85
65
TH
LTC3412
0.1
).
V
1MHz
FORCED CONTINUOUS
OUT
V
A
IN
2.625
and power
MAX
= 2.5V
110
= 5V
1.1
0.8
90
4
4
1
1
1
FB
to
UNITS
3412 G03
3412fb
3
MHz
MHz
MHz
mΩ
mΩ
10
μA
μA
A
V
V