Datasheet

LT3465/LT3465A
5
3465afa
UU
U
PI FU CTIO S
V
OUT
(Pin 1): Output Pin. Connect to output capacitor and
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:
CTRL (Pin 4): Dimming Control and Shutdown Pin. Ground
this pin to shut down the device. When V
CTRL
is greater
than about 1.8V, full-scale LED current is generated.
When V
CTRL
is less than 1V, LED current is reduced.
Floating this pin places the device in shutdown mode.
V
IN
(Pin 5): Input Supply Pin. Must be locally bypassed
with a 1µF X5R or X7R type ceramic capacitor.
SW (Pin 6): Switch Pin. Connect inductor here.
I
R
mV mV n
mV
mV
LED
FB
=
⎛
⎝
⎜
⎞
⎠
⎟
1
200 26 1
200
26
•–•
exp
ex
pp
•
VmV
mV mV
CTRL
()
⎛
⎝
⎜
⎞
⎠
⎟
+
⎛
⎝
⎜
⎜
⎜
⎜
⎞
⎠
⎟
⎟
⎟
⎟
⎛
⎝
⎜
⎜
526
1
⎜⎜
⎜
⎞
⎠
⎟
⎟
⎟
⎟
>for V mV
CTRL
150