LM3501TL-16 National Semiconductor Corporation, LM3501TL-16 Datasheet - Page 2

• Manufacturer Part Number: LM3501TL-16
• Description: Synchronous Step-up DC/DC Converter For White Led Applications
• Manufacturer: National Semiconductor Corporation

www.national.com
Connection Diagram
Ordering Information
Pin Description/Functions
AGND(pin A1): Analog ground pin. The analog ground pin
should tie directly to the GND pin.
V
with a capacitor, as close to the device as possible, con-
nected between the V
V
device. Connect the output capacitor between the V
GND pins as close as possible to the device.
V
switch devices. Keep the inductor connection close to this
pin to minimize EMI radiation.
GND(pin C3): Power ground pin. Tie directly to ground
plane.
IN
OUT
SW
LM3501TLX-16
Order Number
LM3501TL-16
(pin B1): Analog and Power supply pin. Bypass this pin
Pin
(pin C2): Drain connection of internal NMOS and PMOS
A1
B1
C1
C2
C3
B3
A3
A2
(pin C1): Source connection of internal PMOS power
CNTRL
AGND
IN
SHDN
Name
V
GND
V
V
FB
OUT
and GND pins.
SW
IN
Package Type
micro SMD
micro SMD
Analog ground.
Analog and Power supply input.
PMOS source connection for synchronous rectification.
Switch pin. Drain connections of both NMOS and PMOS power devices.
Power Ground.
Output voltage feedback connection.
Analog LED current control.
Shutdown control pin.
T
J(MAX)
NSC Package Drawing
= 125˚C, θ
OUT
8-bump micro SMD
and
TL08SSA
TL08SSA
Top View
JA
2
= 220˚C/W (Note 3)
FB(pin B3): Output voltage feedback connection. Set the
primary White LED network current with a resistor from the
FB pin to GND. Keep the current setting resistor close to the
device and connected between the FB and GND pins.
CNTRL(pin A3): Analog control of LED current. A voltage
above 125mV will begin to regulate the LED current. De-
creasing the voltage below 75mV will turn off the LEDs.
SHDN(pin A2): Shutdown control pin. Disable the device
with a voltage less than 0.3V and enable the device with a
voltage greater than 1.1V. The white LED current can be
controlled using a PWM signal at this pin. There is an
internal pull down on the SHDN pin, the device is in a
normally off state.
20065302
Function
Top Mark
C19
C19
250 Units, Tape and Reel
3000 Units, Tape and Reel
Supplied As