ltc3440 Linear Technology Corporation, ltc3440 Datasheet - Page 2

• Manufacturer Part Number: ltc3440
• Description: Micropower Synchronous Buck-boost Dc/dc Converter
• Manufacturer: Linear Technology Corporation

ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
PARAMETER
Input Start-Up Voltage
Input Operating Range
Output Voltage Adjust Range
Feedback Voltage
Feedback Input Current
Quiescent Current, Burst Mode Operation
Quiescent Current, Shutdown
Quiescent Current, Active
NMOS Switch Leakage
PMOS Switch Leakage
NMOS Switch On Resistance
PMOS Switch On Resistance
Input Current Limit
Maximum Duty Cycle
Minimum Duty Cycle
Frequency Accuracy
MODE/SYNC Threshold
MODE/SYNC Input Current
LTC3440
(Note 1)
V
SW1, SW2 Voltage ..................................... – 0.3V to 6V
V
MODE/SYNC Voltage .................................. – 0.3V to 6V
range, otherwise specifications are at T
2
ELECTRICAL CHARACTERISTICS
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/
IN
C
, R
, V
MODE/SYNC
T
T
OUT
, FB, SHDN/SS,
JMAX
SW1
SW2
10-LEAD (3mm × 3mm) PLASTIC DFN
GND
= 125°C, θ
Voltage........................................ – 0.3V to 6V
R
EXPOSED PAD (PIN 11) IS GND
T
MUST BE SOLDERED TO PCB
1
2
3
4
5
DD PACKAGE
JA
TOP VIEW
= 43°C/ W, θ
W
11
10
JC
9
8
7
6
= 3°C/ W
W W
V
FB
SHDN/SS
V
V
C
IN
OUT
U
A
= 25°C. V
PART MARKING
W
ORDER PART
LTC3440EDD
NUMBER
CONDITIONS
V
V
SHDN = 0V, Not Including Switch Leakage
V
Switches B and C
Switches A and D
Switches B and C
Switches A and D
Boost (% Switch C On)
Buck (% Switch A On)
V
U
IN
FB
C
C
MODE/SYNC
LBKT
= 0V, MODE/SYNC = 3V (Note 3)
= 0V, MODE/SYNC = 0V (Note 3)
DD
= V
= 1.22V
OUT
The
U
= 3.6V, R
= 5.5V
●
denotes specifications that apply over the full operating temperature
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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
= 60k, unless otherwise noted.
MODE/SYNC
SW1
SW2
GND
θ
θ
R
JA
JA
T
= 130°C/ W 1 LAYER BOARD
= 100°C/ W 4 LAYER BOARD
10-LEAD PLASTIC MSOP
1
2
3
4
5
T
θ
MS PACKAGE
JMAX
JC
TOP VIEW
= 45°C/ W
= 125°C,
10
9
8
7
6
●
●
●
●
●
●
●
●
●
V
FB
SHDN/SS
V
V
C
IN
OUT
1.196
MIN
100
2.5
2.5
0.8
0.4
55
1
1.22
0.19
0.22
0.01
TYP
600
2.4
0.1
0.1
0.1
25
75
1
1
PART MARKING
ORDER PART
LTC3440EMS
NUMBER
LTNP
1.244
1000
MAX
2.5
5.5
5.5
1.2
MS
50
40
10
1
5
0
2
1
UNITS
3440fb
MHz
nA
μA
μA
μA
μA
μA
μA
%
%
%
Ω
Ω
V
V
V
V
A
V