LTC3443 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
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
SHDN/SS Threshold
When IC is Enabled
● 0.4
1
1.4
V
SHDN/SS Threshold
When EA is at Max Boost Duty Cycle
2
2.4
V
SHDN/SS Input Current
V_SHDN = 5.5V
0.01
1
µA
sn3443 3443fs
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