Datasheet

LTC3535
2
3535fa
PIN CONFIGURATIONABSOLUTE MAXIMUM RATINGS
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
(Note 1)
TOP VIEW
DD PACKAGE
12-LEAD (3mm × 3mm) PLASTIC DFN
12
11
8
9
10
4
5
3
2
1
FB1
SHDN1
V
IN1
FB2
SHDN2
V
IN2
V
OUT1
SW1
GND
V
OUT2
SW2
GND
6
7
13
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 TEMPERATURE RANGE
LTC3535EDD#PBF LTC3535EDD#TRPBF LDWV 12-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C
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/
(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 I
LOAD
= 1mA 0.68 0.8 V
Input Voltage Range 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 %
ELECTRICAL CHARACTERISTICS