LTC3440 Datasheet, PDF (2/20 Pages) Linear Technology – Micropower Synchronous Buck-Boost DC/DC Converter

LTC3440
ABSOLUTE AXI U RATI GS
(Note 1)
V_IN, V_OUT Voltage........................................ – 0.3V to 6V
SW1, SW2 Voltage ..................................... – 0.3V to 6V
V_C, R_T, FB, SHDN/SS,
MODE/SYNC Voltage .................................. – 0.3V 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
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
R_T 1
MODE/SYNC 2
10 V_C
9 FB
SW1 3
11
8 SHDN/SS
SW2 4
GND 5
7 V_IN
6 V_OUT
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
EXPOSED PAD (PIN 11) IS GND
MUST BE SOLDERED TO PCB
T_JMAX = 125°C, θ_JA = 43°C/ W, θ_JC = 3°C/ W
ORDER PART
NUMBER
LTC3440EDD
DD
PART MARKING
LBKT
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/
TOP VIEW
R_T 1
MODE/SYNC 2
SW1 3
SW2 4
GND 5
10 V_C
9 FB
8 SHDN/SS
7 V_IN
6 V_OUT
MS PACKAGE
10-LEAD PLASTIC MSOP
T_JMAX = 125°C,
θ_JA = 130°C/ W 1 LAYER BOARD
θ_JA = 100°C/ W 4 LAYER BOARD
θ_JC = 45°C/ W
ORDER PART
NUMBER
LTC3440EMS
MS
PART MARKING
LTNP
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes specifications that apply over the full operating temperature
range, otherwise specifications are at T_A = 25°C. V_IN = V_OUT = 3.6V, R_T = 60k, unless otherwise noted.
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
2
CONDITIONS
V_FB = 1.22V
V_C = 0V, MODE/SYNC = 3V (Note 3)
SHDN = 0V, Not Including Switch Leakage
V_C = 0V, MODE/SYNC = 0V (Note 3)
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_MODE/SYNC = 5.5V
MIN TYP MAX UNITS
●
2.4
2.5
V
● 2.5
5.5
V
● 2.5
5.5
V
● 1.196 1.22 1.244
V
1
50
nA
25
40
μA
0.1
1
μA
600 1000
μA
0.1
5
μA
0.1
10
μA
0.19
Ω
0.22
Ω
●1
A
● 55
75
%
● 100
%
●
0
%
● 0.8
1
1.2
MHz
0.4
2
V
0.01
1
μA
3440fb