LTC3443_15 Datasheet, PDF (2/16 Pages) Linear Technology – High Current Micropower 600kHz Synchronous Buck-Boost DC/DC Converter

LTC3443
ABSOLUTE AXI U RATI GS
(Note 1)
V_IN, V_OUT Voltage........................................ – 0.3V to 6V
SW1, SW2 Voltage
DC ...........................................................– 0.3V to 6V
Pulsed < 100ns ...................................... – 0.3V to 7V
SHDN/SS, MODE/SYNC Voltage ................. – 0.3V to 6V
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Maximum Junction Temperature (Note 4) ........... 125°C
Storage Temperature Range ................ – 65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
SHDN/SS 1
GND 2
PGND 3
SW1 4
SW2 5
PGND 6
12 FB
11 V_C
10 V_IN
13
9 PV_IN
8 V_OUT
7 MODE/SYNC
DE12 PACKAGE
12-LEAD (4mm × 3mm) PLASTIC DFN
T_JMAX = 125°C
θ_JA = 53°C/W 1-LAYER BOARD
θ_JA = 43°C/W 4-LAYER BOARD
θ_JC = 4.3°C/W
EXPOSED PAD IS PGND (PIN 13)
MUST BE SOLDERED TO PCB
ORDER PART
NUMBER
LTC3443EDE
DE PART MARKING
3443
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/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS _{The ● denotes the specifications which apply over the full operating}
temperature range, otherwise specifications are at T_A = 25°C. V_IN = V_OUT = 3.6V,unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
Input Start-Up Voltage
●
2.3
2.4
V
Output Voltage Adjust Range
● 2.4
5.25
V
Feedback Voltage
● 1.19 1.22 1.25
V
Feedback Input Current
Quiescent Current—Burst Mode Operation
Quiescent Current—SHDN
Quiescent Current—Active
V_FB = 1.22V
V_C = 0V, MODE/SYNC = 3V (Note 3)
V_OUT = SHDN = 0V, Not Including Switch Leakage
MODE/SYNC = 0V (Note 3)
1
50
nA
28
45
μA
0.1
1
μA
520
900
μA
NMOS Switch Leakage
Switches B and C
0.1
7
μA
PMOS Switch Leakage
Switches A and D
0.1
10
μA
NMOS Switch On Resistance
Switches B and C
0.10
Ω
PMOS Switch On Resistance
Switches A and D
0.11
Ω
Input Current Limit
●2
3.2
A
Max Duty Cycle
Boost (% Switch C On)
Buck (% Switch A In)
● 70
88
%
● 100
%
Min Duty Cycle
●
0
%
Frequency Accuracy
● 510
600
690
kHz
MODE/SYNC Threshold
● 0.4
1.4
V
MODE/SYNC Input Current
Error Amp AV_OL
Error Amp Source Current
V_MODE/SYNC = 5.5V
0.01
1
μA
90
dB
14
μA
Error Amp Sink Current
300
μA
3443fa
2