LTC3535_15 Datasheet, PDF (2/16 Pages) Linear Technology – Dual Channel 550mA 1MHz Synchronous Step-Up DC/DC Converter

LTC3535
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V_IN1, V_IN2 Voltage.......................................... –0.3V to 6V
SW1, SW2 Voltage
DC............................................................. –0.3V to 6V
Pulsed <100ns.......................................... –0.3V to 7V
SHDN1, SHDN2, FB1, FB2 Voltage................ –0.3V to 6V
V_OUT1, V_OUT2................................................. –0.3V to 6V
Operating Temperature Range
(Notes 2, 5)............................................... –40°C to 85°C
Junction Temperature............................................ 125°C
Storage Temperature Range.................... –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
V_OUT1 1
SW1 2
GND 3
V_OUT2 4
SW2 5
GND 6
12 FB1
11 SHDN1
13
10 V_IN1
9 FB2
8 SHDN2
7 V_IN2
DD PACKAGE
12-LEAD (3mm × 3mm) PLASTIC DFN
θ_JA = 43°C/W, θ_JC(PAD) = 3°C/W,
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3535EDD#PBF
LTC3535EDD#TRPBF
LDWV
12-Lead (3mm × 3mm) Plastic DFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
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
ELECTRICAL CHARACTERISTICS (For each channel) The l denotes the specifications which apply over the specified
operating temperature range of –40°C to 85°C, otherwise specifications are at T_A = 25°C. V_IN = 1.2V, V_OUT = 3.3V unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum Start-Up Input Voltage
Input Voltage Range
I_LOAD = 1mA
0.68
0.8
V
After Start-Up. (Minimum Voltage is Load Dependent) l 0.5
5
V
Output Voltage Adjust Range
l 1.5
5.25
V
Feedback Pin Voltage
l 1.165 1.195 1.225
V
Feedback Pin Input Current
V_FB = 1.30V
1
50
nA
Quiescent Current—Shutdown
V_SHDN= 0V, Not Including Switch Leakage, V_OUT = 0V
0.01
1
µA
Quiescent Current—Active
Measured on V_OUT, Non-Switching
250
500
µA
Quiescent Current—Burst
Measured on V_OUT, FB > 1.230V
9
18
µA
N-Channel MOSFET Switch Leakage Current
V_SW = 5V
0.1
5
µA
P-Channel MOSFET Switch Leakage Current
V_SW = 5V, V_OUT = 0V
0.1
10
µA
N-Channel MOSFET Switch On Resistance
V_OUT = 3.3V
0.4
Ω
P-Channel MOSFET Switch On Resistance
V_OUT = 3.3V
0.6
Ω
N-Channel MOSFET Current Limit
l 550
750
mA
Current Limit Delay to Output
(Note 3)
60
ns
Maximum Duty Cycle
V_FB = 1.15V
l 87
90
%
3535fa
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