LTC3205 LINER [Linear Technology], LTC3205 Datasheet - Page 3

• Manufacturer Part Number: LTC3205
• Description: Multidisplay LED Controller
• Manufacturer: LINER [Linear Technology]

temperature range, otherwise specifications are at T
SYMBOL PARAMETER
Charge Pump (CPO)
D
V
V
I
I
Serial Port Timing
t
t
t
t
t
t
t
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3205E is guaranteed to meet performance specifications
from 0 C to 70 C. Specifications over the –40 C to 85 C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
TYPICAL PERFOR A CE CHARACTERISTICS
SETTING)
ELECTRICAL CHARACTERISTICS
IH
IL
DS
DH
L
H
LW
CL
LC
3mA/DIV
IL
IH
IN
(100%
, SCLK, LD, STEPUP, ENRGB
0mA
I
LED
LED Pin Sink Current
vs LED Pin Voltage
1:1 Mode Output Impedance
2:3 Mode Output Impedance
CPO Regulation Voltage
CLK Frequency
Low Level Input Voltage
High Level Input Voltage
Input Current
Input Current
D
D
SCLK Low Time
SCLK High Time
LD Pulse Width
SCLK to LD
LD to SCLK
IN
IN
Valid to SCLK Setup
Valid to SCLK Hold
200mV/DIV
W
3205 G01
U
AC COUPLED
AC COUPLED
(20mV/DIV)
(50mV/DIV)
CONDITIONS
V
I
D
D
CPO
IN
IN
IN
V
OUT
, SCLK, LD, STEPUP, ENRGB = DV
, SCLK, LD, STEPUP, ENRGB = 0V
V
= 3V, V
A
IN
= 20mA, 2:3 Mode
= 25 C. V
Input and Output
Charge Pump Noise
I
V
C
CPO
IN
IN
= 3.6V
= C
= 150mA
CPO
The
CPO
= 4.2V (Note 3)
= 0.7 F
IN
denotes the specifications which apply over the full operating
= 3.6V, DV
500ns/DIV
Note 3: 2:3 mode output impedance is defined as (1.5V
Note 4: Based on long term current density limitations.
CC
= 1.8V unless otherwise noted.
CC
3205 G02
100
90
80
70
60
50
40
30
20
10
0
3.0
0.85 • DV
4-LED Main Panel Efficiency
vs Input Voltage
FOUR LEDs AT 15mA/LED
(TYP V
T
A
MIN
0.6
–1
–1
35
35
35
35
35
35
= 25 C
0
F
AT 15mA = 3.2V)
CC
3.3
INPUT VOLTAGE (V)
TYP
0.8
2.5
4.7
0.8
LTC3205
3.6
0.15 • DV
IN
– V
MAX
1.1
1
1
CPO
3.9
CC
)/I
CPO
3205 TA01b
UNITS
3
MHz
.
3205f
4.2
ns
ns
ns
ns
ns
ns
ns
V
V
V
A
A