Datasheet

V
OUT
V
IN
V
IN
2.7V to 5.6V*
GND
LM2750-ADJ
C
IN
2.2 PF
C
OUT
2.2 PF
8, 9 1, 2
5, 6, DAP
Capacitors: 1.0PF - TDK C1608X5R1A105K
2.2PF - TDK C2012X7R1A225K
V
OUT
= 1.23V + V
LED1
V
OUT
Range: 3.8V to 5.2V
CAP+
CAP-
C
FLY
1 PF
10
7
SD
4
FB
3
For V
OUT
< 4.9V:
max V
IN
= V
OUT
+ 0.7V
I
LED1
= 1.23V ÷ R1
I
LEDx
= (1.23V + V
LED1
- V
LEDx
) ÷ Rx
R1
LED6
R6...
...
LED1
I
OUT
up to 120mA
V
OUT
V
IN
V
IN
2.7V to 5.6V
GND
LM2750-5.0
CAP+
CAP-
SD
C
IN
2.2 PF
C
OUT
2.2 PF
C
FLY
1 PF
8, 9 1, 2
4
10
7
3, 5, 6, DAP
Capacitors:
1.0PF - TDK C1608X5R1A105K
2.2PF - TDK C2012X7R1A225K
V
OUT
= 5.0V ± 4%
I
LEDx
= (5.0V - V
LEDx
) ÷ Rx
LED1
R1
LED6
R6...
...
I
OUT
up to 120mA, (V
IN
t 2.9V)
I
OUT
up to 40mA, (V
IN
t 2.7V)
LM2750
SNVS180L –APRIL 2002–REVISED MAY 2013 www.ti.com
Figure 16. LM2750-5.0 Recommended Layout
LM2750 LED DRIVE APPLICATION
Figure 17. LM2750-5.0 LED Drive Application Circuit
Figure 18. LM2750-ADJ LED Drive Application Circuit
The LM2750 is an excellent part for driving white and blue LEDs for display backlighting and other general-
purpose lighting functions. The circuits of Figure 17 and Figure 18 show LED driver circuits for the LM2750-5.0
and the LM2750-ADJ, respectively. Simply placing a resistor (R) in series with each LED sets the current through
the LEDs:
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