LTC3538 Datasheet, PDF (2/16 Pages) Linear Technology – 800mA Synchronous Buck-Boost DC/DC Converter

LTC3538
ABSOLUTE MAXIMUM RATINGS
(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
BURST, FB, VC Voltage................................. –0.3V to 6V
Operating Temperature (Note 2)............... –40°C to 85°C
Maximum Junction Temperature (Note 3)............. 125°C
Storage Temperature Range................... –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
FB 1
8 V_IN
VC 2
7 SW1
9
GND 3
6 SW2
BURST 4
5 V_OUT
DCB PACKAGE
8-LEAD (2mm × 3mm) PLASTIC DFN
T_JMAX = 125°C
θ_JA = 75°C/W 4-LAYER BOARD, θ_JC = 13.5°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3538EDCB#PBF
LTC3538EDCB#TRPBF LCRB
8-Lead (2mm × 3mm) Plastic DFN
LEAD BASED FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3538EDCB
LTC3538EDCB#TR
LCRB
8-Lead (2mm × 3mm) Plastic DFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
–40°C to 85°C
TEMPERATURE RANGE
–40°C to 85°C
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, BURST = 0V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Input Voltage
● 2.4
5.5
V
Feedback Voltage
(Note 4)
● 0.980 1.00 1.020
V
Feedback Input Current
(Note 4)
1
50
nA
V_IN Quiescent Current – Shutdown
V_IN Quiescent Current – Active
V_IN Quiescent Current – Sleep
NMOS Switch Leakage
V_C = 0V, Not Including Switch Leakage
FB = 0.8V
FB = 1.2V, BURST = V_IN
Switches B and C
1.5
5
μA
1
1.8
mA
35
60
μA
0.1
7
μA
PMOS Switch Leakage
Switches A and D
0.1
10
μA
NMOS Switch On-Resistance
Switches B and C
0.17
Ω
PMOS Switch On-Resistance
Switches A and D
0.2
Ω
Input Current Limit
● 1.4
2
A
Reverse Current Limit
0.5
A
Burst Mode Operational Peak Current
0.9
A
Maximum Duty Cycle
Boost (%Switch C On)
Buck (% Switch A On)
Buck (% Switch D On)
● 70
88
%
● 100
%
● 100
%
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