LTC3205
ABSOLUTE
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
V IN , DV CC , CPO to GND............................. – 0.3V TO 6V
D IN , SCLK, LD, STEPUP,
ENRGB ...................................... – 0.3V to (DV CC + 0.3V)
I CPO (Note 4)...................................................... 250mA
I MAIN1-4, I SUB1,2 (Note 4) ..................................... 50mA
I RED,GREEN,BLUE (Note 4) ..................................... 100mA
MAIN2 1
MAIN1 2
C2 – 3
C1 – 4
TOP VIEW
24 23 22 21 20 19
25
18 RED
17 SGND
16 V IN
15 CPO
ORDER PART
NUMBER
LTC3205EUF
I MS , I RGB (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
C1 + 5
C2 + 6
7
8
9 10 11 12
14 I MS
13 I RGB
UF PART
MARKING
3205
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
T JMAX = 150 ° C, θ JA = 37 ° C/W, θ JC = 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 T A = 25 ° C. V IN = 3.6V, DV CC = 1.8V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Power Supply
V IN Operating Voltage
DV CC Operating Voltage
I VIN Operating Current
I DVCC Operating Current
V IN Shutdown Current
DV CC Shutdown Current
I CPO , I MS , I IRGB = 0 μ A, Step-Down Mode
I CPO = 0 μ A, Step-Up Mode
Serial Port Idle
q
q
2.8
1.5
70
4.2
4.5
5.5
1
1
1
V
V
μ A
mA
μ A
μ A
μ A
White LED Current (MAIN1-MAIN4, SUB1, SUB2)
I MS Servo Voltage
25 μ A < I MS < 75 μ A
q
1.193
1.175
1.223
1.223
1.253
1.271
V
V
Full-Scale LED Current Ratio (I LED /I MS )
Half-Scale LED Current Ratio (I LED /I MS )
MAIN1-MAIN4, SUB1, SUB2 Voltage = 1V
MAIN1-MAIN4, SUB1, SUB2 Voltage = 1V
q
q
368
184
400
200
432
216
mA/mA
mA/mA
Quarter-Scale LED Current Ratio (I LED /I MS ) MAIN1-MAIN4, SUB1, SUB2 Voltage = 1V
LED Current Matching
Any Two MAIN or SUB Outputs
q
92
100
0.7
108
mA/mA
%
RGB LED Current (RED, GREEN, BLUE)
I RGB Servo Voltage
LED Current Ratio (I LED /I RGB )
25 μ A < I RGB < 75 μ A
RED, GREEN, BLUE Voltage = 1V
q
1.193
1.175
360
1.223
1.223
400
1.253
1.271
440
V
V
mA/mA
RGB PWM Frequency
RGB LED Switching Frequency
3.5
kHz
RGB PWM (Duty Factor) Range
0/15
15/15
%
3205f
2
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