LM3503SQ-16/NOPB National Semiconductor, LM3503SQ-16/NOPB Datasheet - Page 18
![IC LED DRIVER WHTE BCKLGT 16-LLP](/photos/6/68/66869/pkg_sqa16a_sml.jpg)
LM3503SQ-16/NOPB
Manufacturer Part Number
LM3503SQ-16/NOPB
Description
IC LED DRIVER WHTE BCKLGT 16-LLP
Manufacturer
National Semiconductor
Series
PowerWise®r
Type
Backlight, White LEDr
Datasheet
1.LM3503SQ-16NOPB.pdf
(20 pages)
Specifications of LM3503SQ-16/NOPB
Constant Current
Yes
Topology
PWM, Step-Up (Boost)
Number Of Outputs
2
Internal Driver
Yes
Type - Primary
Backlight
Type - Secondary
White LED
Frequency
800kHz ~ 1.2MHz
Voltage - Supply
2.5 V ~ 5.5 V
Voltage - Output
15 V ~ 15.5 V
Mounting Type
Surface Mount
Package / Case
16-LLP
Operating Temperature
-40°C ~ 85°C
Current - Output / Channel
400mA
Internal Switch(s)
Yes
Efficiency
80%
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM3503SQ-16
LM3503SQ-16NOPB
LM3503SQ-16NOPBTR
LM3503SQ-16NOPBTR
LM3503SQ-16TR
LM3503SQ-16NOPB
LM3503SQ-16NOPBTR
LM3503SQ-16NOPBTR
LM3503SQ-16TR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM3503SQ-16/NOPB
Manufacturer:
NS
Quantity:
742
www.national.com
Application Information
capacitor can be placed in parallel with C
frequency noise to ground. The output capacitor, C
be placed close to the IC and be connected between the
V
C
directly effects output voltage ripple and efficiency. The cur-
rent setting resistor, R1, should be kept close to the Fb pin to
OUT1
OUT
capacitor can increase the series resistance, which
and Pgnd pins. Any copper trace connections for the
IN
(Continued)
to shunt any high
OUT
, must
18
minimize copper trace connections that can inject noise into
the system. The ground connection for the current setting
resistor network should connect directly to the Pgnd pin. The
Agnd pin should be tied directly to the Pgnd pin. Trace
connections made to the inductor should be minimized to
reduce power dissipation and increase overall efficiency
while reducing EMI radiation. For more details regarding
layout guidelines for switching regulators, refer to Applica-
tions Note AN-1149.