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| LTC3411 Datasheet, PDF (2/20 Pages) Linear Technology – 1.25A, 4MHz, Synchronous Step-Down DC/DC Converter | |||
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LTC3411
ABSOLUTE AXI U RATI GS (Note 1)
PVIN, SVIN Voltages .....................................â 0.3V to 6V
VFB, ITH, SHDN/RT Voltages .......... â 0.3V to (VIN + 0.3V)
SYNC/MODE Voltage .................... â 0.3V to (VIN + 0.3V)
SW Voltage ................................... â 0.3V to (VIN + 0.3V)
PGOOD Voltage ...........................................â 0.3V to 6V
Operating Ambient Temperature Range
(Note 2) .................................................. â 40°C to 85°C
Junction Temperature (Notes 5, 8) ....................... 125°C
Storage Temperature Range
DD Package ...................................... â 65°C to 125°C
MS Package .................................... â 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
SHDN/RT 1
SYNC/MODE 2
SGND 3
SW 4
PGND 5
10 ITH
9 VFB
8 PGOOD
7 SVIN
6 PVIN
DD PACKAGE
10-LEAD (3mm à 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/W, θJC = 3°C/W
(EXPOSED PAD MUST BE SOLDERED TO PCB)
ORDER PART
NUMBER
LTC3411EDD
DD PART MARKING
LADT
Consult LTC Marketing for parts specified with wider operating temperature ranges.
TOP VIEW
SHDN/RT 1
SYNC/MODE 2
SGND 3
SW 4
PGND 5
10 ITH
9 VFB
8 PGOOD
7 SVIN
6 PVIN
MS PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 120°C/W, θJC = 10°C/W
ORDER PART
NUMBER
LTC3411EMS
MS PART MARKING
LTQT
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.3V, RT = 324k unless otherwise specified. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
VIN
Operating Voltage Range
2.625
5.5
IFB
Feedback Pin Input Current
(Note 3)
VFB
Feedback Voltage
(Note 3)
±0.1
q 0.784 0.8 0.816
âVLINEREG
âVLOADREG
gm(EA)
Reference Voltage Line Regulation
Output Voltage Load Regulation
Error Amplifier Transconductance
VIN = 2.7V to 5V
ITH = 0.36, (Note 3)
ITH = 0.84, (Note 3)
ITH Pin Load = ±5µA (Note 3)
0.04
0.2
q
0.02
0.2
q
â 0.02 â 0.2
800
IS
VSHDN/RT
Input DC Supply Current (Note 4)
Active Mode
Sleep Mode
Shutdown
Shutdown Threshold High
Active Oscillator Resistor
VFB = 0.75V, SYNC/MODE = 3.3V
VSYNC/MODE = 3.3V, VFB = 1V
VSHDN/RT = 3.3V
240 350
62
100
0.1
1
VIN â 0.6 VIN â 0.4
324k 1M
fOSC
Oscillator Frequency
RT = 324k
(Note 7)
0.85
1
1.15
4
fSYNC
Synchronization Frequency
(Note 7)
0.4
4
ILIM
RDS(ON)
Peak Switch Current Limit
Top Switch On-Resistance (Note 6)
ITH = 1.3
VIN = 3.3V
1.6
2
0.11 0.15
ISW(LKG)
Bottom Switch On-Resistance (Note 6)
Switch Leakage Current
VIN = 3.3V
VIN = 6V, VITH/RUN = 0V, VFB = 0V
0.11 0.15
0.01
1
VUVLO
Undervoltage Lockout Threshold
VIN Ramping Down
2.375 2.5 2.625
UNITS
V
µA
V
%/V
%
%
µS
µA
µA
µA
V
â¦
MHz
MHz
MHz
A
â¦
â¦
µA
V
sn3411 3411fs
2
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