LTC3414 Datasheet, PDF (2/16 Pages) Linear Technology – 4A, 4MHz, Monolithic Synchronous Step-Down Regulator

LTC3414
ABSOLUTE AXI U RATI GS
(Note 1)
Input Supply Voltage ................................... –0.3V to 6V
I_TH, RUN/SS, V_FB,
SYNC/MODE Voltages .................................. –0.3 to V_IN
SW Voltages ................................. –0.3V to (V_IN + 0.3V)
Peak SW Sink and Source Current ......................... 9.5A
Operating Ambient Temperature Range
(Note 2) .............................................. – 40°C to 85°C
Junction Temperature (Notes 5, 6) ....................... 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
PGND 1
RT 2
SYNC/MODE 3
RUN/SS 4
SGND 5
NC 6
PV_IN 7
SW 8
SW 9
PGND 10
TOP VIEW
21
20 PGND
19 V_FB
18 I_TH
17 PGOOD
16 SV_IN
15 NC
14 PV_IN
13 SW
12 SW
11 PGND
ORDER PART
NUMBER
LTC3414EFE
FE PACKAGE
20-LEAD PLASTIC TSSOP
EXPOSED PAD (PIN 21)
MUST BE SOLDERED TO PCB
T_JMAX = 125°C, θ_JA = 38°C/W, θ_JC = 10°C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.3V unless otherwise specified.
SYMBOL
V_IN
I_FB
V_FB
∆V_FB
V_LOADREG
∆V_PGOOD
R_PGOOD
I_Q
f_OSC
f_SYNC
R_PFET
R_NFET
I_LIMIT
V_UVLO
I_LSW
V_RUN
PARAMETER
Input Voltage Range
Feedback Pin Input Current
Regulated Feedback Voltage
Reference Voltage Line Regulation
Output Voltage Load Regulation
Power Good Range
Power Good Resistance
Input DC Bias Current
Active Current
Sleep
Shutdown
Switching Frequency
Switching Frequency Range
SYNC Capture Range
R_DS(ON) of P-Channel FET
R_DS(ON) of N-Channel FET
Peak Current Limit
Undervoltage Lockout Threshold
SW Leakage Current
RUN Threshold
CONDITIONS
(Note 3)
(Note 3)
V_IN = 2.7V to 5.5V (Note 3)
Measured in Servo Loop, V_ITH = 0.36V
Mesured in Servo Loop, V_ITH = 0.84V
(Note 4)
V_FB = 0.75V, V_ITH = 1.2V
V_FB = 1V, V_ITH = 0V, V_SYNC/MODE = 0V
V_RUN = 0V
R_OSC = 294k
I_SW = 300mA
I_SW = –300mA
V_RUN = 0V, V_IN = 5.5V
MIN
q 2.25
q 0.784
q
q
q
TYP
0.800
0.04
0.02
– 0.02
±7.5
120
MAX
5.5
0.2
0.816
0.2
0.2
– 0.2
±9
200
UNITS
V
µA
V
%V
%
%
%
Ω
250 330
µA
64
100
µA
0.02
1
µA
0.88 1.00 1.12
MHz
0.3
4
MHz
0.3
4
MHz
67
100
mΩ
50
100
mΩ
6
8
A
1.75 2.00 2.25
V
0.1
1.0
µA
0.5
0.65
0.8
V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3414E is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 85°C operating
ambient temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: The LTC3414 is tested in a feedback loop that adjusts V_FB to
achieve a specified error amplifier output voltage (I_TH).
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5: T_J is calculated from the ambient temperature T_A and power
dissipation P_D as follows: T_J =T_A + (P_D)(38°C/W)
Note 6: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliabiability.
3414f
2