LT3465 LINER [Linear Technology], LT3465 Datasheet - Page 4

• Manufacturer Part Number: LT3465
• Description: 1.2MHz/2.4MHz White LED Step-Up Converters with Built-In Schottky in ThinSOT
• Manufacturer: LINER [Linear Technology]

LT3465/LT3465A
PI FU CTIO S
V
LEDs. Minimize trace between this pin and output capaci-
tor to reduce EMI.
GND (Pin 2): Ground Pin. Connect directly to local ground
plane.
FB (Pin 3): Feedback Pin. Reference voltage is 200mV.
Connect LEDs and a resistor at this pin. LED current is
determined by the resistance and CTRL pin voltage:
4
TYPICAL PERFOR A CE CHARACTERISTICS
OUT
210
208
206
204
202
200
198
196
194
190
192
I
I
U
LED
LED
–50
(Pin 1): Output Pin. Connect to output capacitor and
Feedback Voltage
–30
200
5
U
V
R
CTRL
•
–10
R
FB
mV
TEMPERATURE ( C)
80
85
75
70
60
FB
65
–50
10
V
When V
IN
When V
U
= 3.6V, 4 LEDs
30
LT3465
LT3465A
50
TEMPERATURE ( C)
CTRL
15mA
CTRL
0
W
70
3465A G09
90
1
U
1 8
V
.
50
V
10mA
3465A G12
20mA
3.0
2.5
2.0
1.5
1.0
0.5
0
Quiescent Current (CTRL = 3V)
0
100
5
V
IN
10
(V)
CTRL (Pin 4): Dimming Control and Shutdown Pin. Ground
this pin to shut down the device. When V
than about 1.8V, full-scale LED current is generated. When
V
V
with a 1 F X5R or X7R type ceramic capacitor.
SW (Pin 6): Switch Pin. Connect inductor here.
CTRL
IN
(Pin 5): Input Supply Pin. Must be locally bypassed
15
is less than 1V, LED current is reduced.
7
6
4
3
2
0
8
5
1
–50
–50 C
25 C
100 C
3465A G10
Schottky Leakage Current
20
TEMPERATURE ( C)
0
350
300
200
150
100
400
250
50
0
0
Switching Current Limit
50
20
V
V
R
R
V
= 16
= 10
R
DUTY CYCLE (%)
= 25
3465A G13
40
100
CTRL
60
is greater
80
–50 C
25 C
100 C
3465A G11
3465af
100