Datasheet

LTC3409
2
3409fc
PIN CONFIGURATIONABSOLUTE MAXIMUM RATINGS
ORDER INFORMATION
ELECTRICAL CHARACTERISTICS
Input Supply Voltage ................................... –0.3V to 6V
RUN, V
FB
, MODE, SYNC Voltages . –0.3V to (V
IN
+ 0.3V)
SW Voltage ................................... –0.3V to (V
IN
+ 0.3V)
Operating Temperature Range (Note 2) .. –40°C to 85°C
Junction Temperature (Note 3) ........................... 125°C
Storage Temperature Range .................. –65°C to 125°C
(Note 1)
The
● denotes specifi cations which apply over the full operating
temperature range, otherwise specifi cations are T
A
= 25°C. V
IN
= 2.2V unless otherwise specifi ed.
TOP VIEW
9
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
5
6
7
8
4
3
2
1V
FB
GND
V
IN
V
IN
SYNC
RUN
SW
MODE
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3409EDD#PBF LTC3409EDD#TRPBF LBNM 8-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C
LTC3409IDD#PBF LTC3409IDD#TRPBF LBNM 8-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *Temperature grades are identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
RUN
RUN Threshold
●
0.3 0.65 1.1 V
I
RUN
RUN Leakage Current V
RUN
= 0V or = 2.2V 0.01 1 μA
V
MODE
MODE Threshold
●
0.3 0.65 1.1 V
I
MODE
MODE Leakage Current V
MODE
= 0V or = 2.2V 0.01 1 μA
V
SYNCTH
SYNC Threshold
●
0.3 0.65 1.1 V
I
SYNC
SYNC Leakage Current V
SYNC
= 0V or = 2.2V 0.01 1 μA
V
FB
Regulated Feedback Voltage (Note 4) T
A
= 25°C
(Note 4) 0°C ≤ T
A
≤ 85°C
(Note 4) –40°C ≤ T
A
≤ 85°C
●
0.6007
0.5992
0.5977
0.6130
0.6130
0.6130
0.6252
0.6268
0.6283
V
V
V
I
VFB
Feedback Current ±30 nA
ΔV
OVL
ΔV
FBOVL
Overvoltage Lockout ΔV
OVL
= ΔV
FBOVL
– V
FB
(Note 6) 35 61 85 mV
ΔV
FB
Reference Voltage Line Regulation 1.6V < V
IN
< 5.5V (Note 4)
●
0.04 0.4 %/V
ΔV
OUT
Output Voltage Line Regulation I
OUT
= 100mA, 1.6V < V
IN
< 5.5V 0.04 0.4 %/V
I
PK
Peak Inductor Current V
FB
= 0.5V or V
OUT
= 90% 0.75 1 1.3 A
V
LOADREG
Output Voltage Load Regulation V
OUT
= 1.2V, Pulse Skip Mode, 0 < I
LOAD
< 600mA 0.5 %
V
IN
Input Voltage Range
●
1.6 5.5 V