LTC3412A Linear Technology, LTC3412A Datasheet - Page 3

• Manufacturer Part Number: LTC3412A
• Description: 3A/ 4MHz/ Monolithic Synchronous Step-Down Regulator
• Manufacturer: Linear Technology

temperature range, otherwise specifi cations are at T
SYMBOL
SV
V
I
ΔV
V
ΔV
R
I
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 LTC3412AE is guaranteed to meet performance specifi cations
from 0°C to 85°C. Specifi cations over the – 40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3412AI is guaranteed to
meet performance specifi cations over the full –40°C to 85°C operating
temperature range.
ELECTRICAL CHARACTERISTICS
FB
Q
OSC
SYNC
LIMIT
LSW
RUN
FB
LOADREG
UVLO
RUN
PGOOD
PFET
NFET
FB
PGOOD
IN
PARAMETER
Signal Input Voltage Range
Regulated Feedback Voltage
Voltage Feedback Leakage Current
Reference Voltage Line Regulation
Output Voltage Load Regulation
Power Good Range
Power Good Pull-Down Resistance
Input DC Bias Current
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)
Active Current
Sleep
Shutdown
of P-Channel FET
of N-Channel FET
CONDITIONS
(Note 3)
V
Measured in Servo Loop, V
Measured in Servo Loop, V
(Note 4)
V
V
V
R
(Note 6)
(Note 6)
I
I
V
SW
SW
IN
FB
FB
RUN
RUN
OSC
A
= 2.7V to 5.5V (Note 3)
= 0.78V, V
= 1V, V
= 1A (Note 7)
= –1A (Note 7)
= 25°C. V
= 0V, V
= 294kΩ
= 0V, V
The
ITH
MODE
IN
ITH
= 0V
●
= 5.5V
IN
denotes the specifi cations which apply over the full operating
= 1V
= 3.3V unless otherwise specifi ed.
= 0V
Note 3: The LTC3412A is tested in a feedback loop that adjusts V
achieve a specifi ed error amplifi er 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: LTC3412AFE: T
Note 6: 4MHz operation is guaranteed by design and not production tested.
Note 7: Switch on resistance is guaranteed by design and test condition in
the UF package and by fi nal test correlation in the FE package.
ITH
ITH
= 0.36V
= 0.84V
J
is calculated from the ambient temperature T
LTC3412AUF: T
●
●
●
●
0.784
2.25
0.88
1.75
MIN
0.3
0.3
4.5
0.5
J
J
= T
= T
A
A
w w w . D a t a S h e e t 4 U .
+ P
+ P
0.800
–0.02
0.04
0.02
±7.5
0.02
0.65
TYP
120
250
0.1
0.1
LTC3412A
64
77
65
D
D
1
6
2
(38°C/W)
(34°C/W)
TH
).
A
0.816
MAX
–0.2
2.25
and power
200
330
110
5.5
0.2
0.2
0.2
1.1
0.8
±9
80
90
1
4
4
1
1
FB
to
UNITS
3412afc
3
MHz
MHz
MHz
mΩ
mΩ
%V
μA
μA
μA
μA
μA
μA
%
%
%
Ω
V
V
A
V
V