LTC3407A-2 Linear Technology, LTC3407A-2 Datasheet - Page 3

• Manufacturer Part Number: LTC3407A-2
• Description: Dual Synchronous 800mA2.25MHz Step-Down DC/DC Regulator
• Manufacturer: Linear Technology

temperature range, otherwise specifications are at T
SYMBOL
V
I
V
ΔV
ΔV
I
f
f
I
R
I
POR
V
I
V
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 LTC3407AE-2 is guaranteed to meet specified performance
from 0°C to 85°C. Specifications over the – 40°C and 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3407AI-2 is guaranteed over the
full –40°C to 125°C operating temperature range.
ELECTRICAL CHARACTERISTICS
FB
S
OSC
SYNC
LIM
SW(LKG)
RUN
IN
FB
DS(ON)
RUN
MODE
LINE REG
LOAD REG
PARAMETER
Operating Voltage Range
Feedback Pin Input Current
Feedback Voltage (Note 3)
Reference Voltage Line Regulation
Output Voltage Load Regulation
Input DC Supply Current
Oscillator Frequency
Synchronization Frequency
Peak Switch Current Limit
Top Switch On-Resistance
Bottom Switch On-Resistance
Switch Leakage Current
Power-On Reset Threshold
Power-On Reset On-Resistance
Power-On Reset Delay
RUN/SS Threshold Low
RUN/SS Threshold High
RUN/SS Leakage Current
MODE Threshold Low
MODE Threshold High
Active Mode
Sleep Mode
Shutdown
A
= 25°C. V
CONDITIONS
0°C ≤ T
–40°C ≤ T
V
MODE/SYNC = 0V (Note 3)
(Note 4)
V
V
RUN = 0V, V
V
V
(Note 6)
(Note 6)
V
V
V
IN
FB1
FB1
FBX
IN
IN
FBX
FBX
The
= 2.5V to 5.5V (Note 3)
= 3V, V
= 5V, V
= V
= V
= 0.6V
Ramping Up, MODE/SYNC = 0V
Ramping Down, MODE/SYNC = 0V
A
FB2
FB2
●
IN
≤ 85°C
A
denotes the specifications which apply over the full operating
FBX
RUN
= 3.6V, unless otherwise specified. (Note 2)
≤ 125°C (Note 2)
= 0.5V
= 0.63V, MODE/SYNC = 3.6V
IN
= 0.5V, Duty Cycle <35%
= 5.5V, MODE/SYNC = 0V
= 0V, V
Note 3: The LTC3407A-2 is tested in a proprietary test mode that connects
V
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5: T
according to the following formula: T
Note 6: The DFN switch on-resistance is guaranteed by correlation to
wafer level measurements.
FB
to the output of the error amplifier.
FBX
J
= 0V
is calculated from the ambient T
●
●
●
●
●
●
●
V
0.588
0.585
IN
MIN
J
2.5
1.8
0.3
1
0
= T
– 0.5
A
LTC3407A-2
A
+ (P
www.DataSheet4U.com
and power dissipation P
65,536
2.25
2.25
0.35
0.30
0.01
–8.5
0.01
D
TYP
700
100
0.6
0.6
0.3
0.5
0.1
1.2
8.5
40
1
• θ
JA
).
0.612
0.612
MAX
0.45
0.45
950
200
5.5
0.5
2.7
1.6
1.5
0.5
V
30
60
1
1
2
1
IN
UNITS
Cycles
3407a2f
D
3
MHz
MHz
%/V
nA
μA
μA
μA
μA
μA
%
%
Ω
Ω
%
Ω
V
V
V
A
V
V
V
V