LT3003 LINER [Linear Technology], LT3003 Datasheet - Page 5

• Manufacturer Part Number: LT3003
• Description: 3-Channel LED Ballaster with PWM
• Manufacturer: LINER [Linear Technology]

PIN FUNCTIONS
BLOCK DIAGRAM
V
EE
• Boost: Connect to System Ground
• Buck Mode: Connect to Inductor
• Buck-Boost Mode: Connect to Input Supply
(Pin 10): Lower Rail.
6
PWM
0.5V
1
LED1
B1
+
–
4
V
MAX
+
–
B1 B2 B3
V
IN
LOGIC
PWM
Figure 1. Block Diagram
V
EE
B2
11
2
LED2
EXPOSED PAD
Exposed Pad (Pin 11): GND. The ground for the IC should
be soldered to a continuous copper ground plane under
the LT3003 die. Soldering the Exposed Pad to the copper
ground plane under the device will reduce thermal resis-
tance and increase the power capability of the LT3003.
BIAS
BG
BG
SHUTDOWN
THERMAL
150°C
125°C
–
+
+
–
+
–
3V
0.7V
B3
3
LED3
LT3003
SHDN
OT1
OT2
V
V
EE
IN
3003 F01
10
5
9
7
8
3003fa
5