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LT3497
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Voltage (VIN) ...................................................10V
PACKAGE/ORDER INFORMATION
TOP VIEW
SW1, SW2 Voltages ..................................................35V
CAP1, CAP2 Voltages ................................................35V
LED1 1
CTRL1 2
10 CAP1
9 SW1
CTRL1, CTRL2 Voltages ............................................10V
LED1, LED2 Voltages ................................................35V
Operating Temperature Range ................. –40°C to 85°C
GND 3
CTRL2 4
LED2 5
11
8
7
6
V IN
SW2
CAP2
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range................... –65°C to 125°C
DDB PACKAGE
10-LEAD (3mm × 2mm) PLASTIC DFN
T JMAX = 125°C, θ JA = 76°C/W, θ JC = 13.5°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER
LT3497EDDB
DDB PART MARKING
LCGT
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 speci?ed with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C. V IN = 3V, V CTRL1 = V CTRL2 = 3V.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Operating Voltage
2.5
V
LED Current Sense Voltage (V CAP1 – V LED1 )
LED Current Sense Voltage (V CAP2 – V LED2 )
Offset Voltage (V OS ) Between
V CAP1 = 16V
V CAP2 = 16V
V OS = |(V CAP1 – V LED1 ) – (V CAP2 – V LED2 )|
●
●
190
190
0
200
200
2
210
210
8
mV
mV
mV
(V CAP1 – V LED1 ) – (V CAP2 – V LED2 ) Voltages
CAP1, LED1 Pin Bias Current
CAP2, LED2 Pin Bias Current
V CAP1 , V LED1 Common Mode Minimum Voltage
V CAP2 , V LED2 Common Mode Minimum Voltage
Supply Current
V CAP1 = 16V, V LED1 = 16V
V CAP2 = 16V, V LED2 = 16V
V CAP1 = V CAP2 = 16V, V LED1 = V LED2 = 15V,
20
20
6
40
40
2.5
2.5
8.5
μA
μA
V
V
mA
V CTRL1 = V CTRL2 = 3V
V CTRL1 = V CTRL2 = 0V
12
18
μA
Switching Frequency
Maximum Duty Cycle
1.8
88
2.3
92
2.8
MHz
%
Converter 1 Switch Current Limit SW1
Converter 2 Switch Current Limit SW2
Converter 1 V CESAT
Converter 2 V CESAT
I SW1 = 200mA
I SW2 = 200mA
●
●
300
300
400
400
200
200
mA
mA
mV
mV
Switch 1 Leakage Current
Switch 2 Leakage Current
V SW1 = 16V
V SW2 = 16V
0.1
0.1
5
5
μA
μA
3497f
2
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