LTC3205 データシートの表示（PDF） - Linear Technology
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LTC3205 Datasheet PDF : 16 Pages
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LTC3205
ABSOLUTE AXI U RATI GS
(Note 1)
VIN, DVCC, CPO to GND............................. – 0.3V TO 6V
DIN, SCLK, LD, STEPUP,
ENRGB ...................................... – 0.3V to (DVCC + 0.3V)
ICPO (Note 4)...................................................... 250mA
IMAIN1-4, ISUB1,2 (Note 4) ..................................... 50mA
IRED,GREEN,BLUE (Note 4) ..................................... 100mA
IMS, IRGB (Note 4) .................................................. 1mA
CPO Short-Circuit Duration ............................ Indefinite
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
24 23 22 21 20 19
MAIN2 1
MAIN1 2
C2– 3
C1– 4
C1+ 5
C2+ 6
18 RED
17 SGND
16 VIN
25
15 CPO
14 IMS
13 IRGB
7 8 9 10 11 12
ORDER PART
NUMBER
LTC3205EUF
UF PART
MARKING
3205
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
TJMAX = 150°C, θJA = 37°C/W, θJC = 2°C/W
EXPOSED PAD IS PGND (PIN 25)
MUST BE SOLDERED TO PCB
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V, DVCC = 1.8V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Input Power Supply
VIN Operating Voltage
DVCC Operating Voltage
IVIN Operating Current
IDVCC Operating Current
VIN Shutdown Current
DVCC Shutdown Current
White LED Current (MAIN1-MAIN4, SUB1, SUB2)
ICPO, IMS, IIRGB = 0µA, Step-Down Mode
ICPO = 0µA, Step-Up Mode
Serial Port Idle
q 2.8
4.5
V
q 1.5
5.5
V
70
µA
4.2
mA
1
µA
1
µA
1
µA
IMS Servo Voltage
25µA < IMS < 75µA
1.193 1.223 1.253
V
q 1.175 1.223 1.271
V
Full-Scale LED Current Ratio (ILED/IMS) MAIN1-MAIN4, SUB1, SUB2 Voltage = 1V
Half-Scale LED Current Ratio (ILED/IMS) MAIN1-MAIN4, SUB1, SUB2 Voltage = 1V
Quarter-Scale LED Current Ratio (ILED/IMS) MAIN1-MAIN4, SUB1, SUB2 Voltage = 1V
LED Current Matching
Any Two MAIN or SUB Outputs
q 368
400
432 mA/mA
q 184
200
216 mA/mA
q 92
100 108 mA/mA
0.7
%
RGB LED Current (RED, GREEN, BLUE)
IRGB Servo Voltage
25µA < IRGB < 75µA
1.193 1.223 1.253
V
q 1.175 1.223 1.271
V
LED Current Ratio (ILED/IRGB)
RGB PWM Frequency
RED, GREEN, BLUE Voltage = 1V
360 400 440 mA/mA
RGB LED Switching Frequency
3.5
kHz
RGB PWM (Duty Factor) Range
0/15
15/15
%
3205f
2
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