LT3497 データシートの表示（PDF） - Linear Technology
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LT3497 Datasheet PDF : 20 Pages
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LT3497
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Voltage (VIN) ...................................................10V
SW1, SW2 Voltages..................................................35V
CAP1, CAP2 Voltages................................................35V
CTRL1, CTRL2 Voltages............................................10V
LED1, LED2 Voltages ................................................35V
Operating Temperature Range ................. –40°C to 85°C
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range................... –65°C to 125°C
PACKAGE/ORDER INFORMATION
TOP VIEW
LED1 1
CTRL1 2
GND 3
CTRL2 4
LED2 5
10 CAP1
9 SW1
11 8 VIN
7 SW2
6 CAP2
DDB PACKAGE
10-LEAD (3mm × 2mm) PLASTIC DFN
TJMAX = 125°C, θJA = 76°C/W, θJC = 13.5°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER DDB PART MARKING
LT3497EDDB
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 specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3V, VCTRL1 = VCTRL2 = 3V.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum Operating Voltage
2.5
V
LED Current Sense Voltage (VCAP1 – VLED1)
LED Current Sense Voltage (VCAP2 – VLED2)
Offset Voltage (VOS) Between
(VCAP1 – VLED1) – (VCAP2 – VLED2) Voltages
CAP1, LED1 Pin Bias Current
CAP2, LED2 Pin Bias Current
VCAP1, VLED1 Common Mode Minimum Voltage
VCAP2, VLED2 Common Mode Minimum Voltage
Supply Current
Switching Frequency
VCAP1 = 16V
VCAP2 = 16V
VOS = |(VCAP1 – VLED1) – (VCAP2 – VLED2)|
VCAP1 = 16V, VLED1 = 16V
VCAP2 = 16V, VLED2 = 16V
VCAP1 = VCAP2 = 16V, VLED1 = VLED2 = 15V,
VCTRL1 = VCTRL2 = 3V
VCTRL1 = VCTRL2 = 0V
● 190
200
210
mV
● 190
200
210
mV
0
2
8
mV
20
40
µA
20
40
µA
2.5
V
2.5
V
6
8.5
mA
12
18
µA
1.8
2.3
2.8
MHz
Maximum Duty Cycle
88
92
%
Converter 1 Switch Current Limit SW1
● 300
400
mA
Converter 2 Switch Current Limit SW2
● 300
400
mA
Converter 1 VCESAT
Converter 2 VCESAT
Switch 1 Leakage Current
Switch 2 Leakage Current
ISW1 = 200mA
ISW2 = 200mA
VSW1 = 16V
VSW2 = 16V
200
mV
200
mV
0.1
5
µA
0.1
5
µA
3497f
2
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