Datasheet

2
LTC3401
3401fb
(Note 1)
V
IN
, V
OUT
Voltages ...................................... –0.5V to 6V
SW Voltage ................................................. –0.5V to 6V
V
C
, R
t
Voltages ......................... –0.5V to (V
OUT
+ 0.3V)
PGOOD, SHDN, FB, MODE Voltages ........... –0.5V to 6V
Operating Temperature Range (Note 2) .. –40°C to 85°C
Storage Temperature Range ................. – 65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
T
JMAX
= 125°C
θ
JA
= 130°C/ W 1 LAYER BOARD
θ
JA
= 100°C/ W 4 LAYER BOARD
MS PART MARKING
ORDER PART
NUMBER
LTC3401EMS
LTPG
The ● denotes specifications that apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
IN
= 1.2V, V
OUT
= 3.3V unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Start-Up Voltage I
LOAD
< 1mA 0.85 1.0 V
Minimum Operating Voltage (Note 4) ● 0.5 V
Output Voltage Adjust Range ● 2.6 5.5 V
Feedback Voltage ● 1.22 1.25 1.28 V
Feedback Input Current V
FB
= 1.25V 1 50 nA
Quiescent Current—Burst Mode Operation V
C
= 0V, MODE/SYNC = 3.3V (Note 3) 38 65 μA
Quiescent Current—SHDN SHDN = 0V, Not Including Switch Leakage 0.1 1 μA
Quiescent Current—Active V
C
= 0V, MODE/SYNC = 0V, R
t
= 300k (Note 3) 440 800 μA
NMOS Switch Leakage 0.1 5 μA
PMOS Switch Leakage 0.1 10 μA
NMOS Switch On Resistance 0.16 Ω
PMOS Switch On Resistance 0.18 Ω
NMOS Current Limit ● 1 1.6 A
NMOS Burst Current Limit 0.66 A
Maximum Duty Cycle R
t
= 15k ● 80 85 %
Minimum Duty Cycle ● 0%
Frequency Accuracy R
t
= 15k ● 1.6 2 2.4 MHz
MODE/SYNC Input High 1.4 V
MODE/SYNC Input Low 0.4 V
MODE/SYNC Input Current V
MODE/SYNC
= 5.5V 0.01 1 μA
Error Amp Transconductance ΔI = – 5μA to 5μA, V
C
= V
FB
85 μmhos
PGOOD Threshold Referenced to Feedback Voltage – 6 – 9 – 12 %
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
ELECTRICAL CHARACTERISTICS
1
2
3
4
5
R
t
MODE
V
IN
SW
GND
10
9
8
7
6
SHDN
V
C
FB
V
OUT
PGOOD
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/