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LM3500TL-16 Datasheet(Fiches technique) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Numéro de pièce LM3500TL-16
Description  Synchronous Step-up DC/DC Converter for White LED
Télécharger  18 Pages
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Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3500TL-16 Datasheet(HTML) 2 Page - National Semiconductor (TI)

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Connection Diagram
Top View
20065702
8-bump micro SMD
Ordering Information
Maximum
Output
Voltage
Order Number
Package Type
NSC Package
Drawing
Top Mark
Supplied As
16V
LM3500TL-16
micro SMD
TL08SSA
S18
250 Units, Tape and Reel
16V
LM3500TLX-16
micro SMD
TL08SSA
S18
3000 Units, Tape and Reel
21V
LM3500TL-21
micro SMD
TL08SSA
S23
250 Units, Tape and Reel
21V
LM3500TLX-21
micro SMD
TL08SSA
S23
3000 Units, Tape and Reel
Pin Description/Functions
Pin
Name
Function
A1
AGND
Analog ground.
B1
V
IN
Analog and Power supply input.
C1
V
OUT
PMOS source connection for synchronous rectification.
C2
V
SW
Switch pin. Drain connections of both NMOS and PMOS power devices.
C3
GND
Power Ground.
B3
FB
Output voltage feedback connection.
A3
NC
No internal connection made to this pin.
A2
SHDN
Shutdown control pin.
AGND(pin A1): Analog ground pin. The analog ground pin
should tie directly to the GND pin.
V
IN(pin B1): Analog and Power supply pin. Bypass this pin
with a capacitor, as close to the device as possible, con-
nected between the V
IN and GND pins.
V
OUT(pin C1): Source connection of internal PMOS power
device. Connect the output capacitor between the V
OUT and
GND pins as close as possible to the device.
V
SW(pin C2): Drain connection of internal NMOS and PMOS
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.
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.
NC(pin A3): No internal connection is made to this pin. The
maximum allowable voltage that can be applied to this pin is
7.5V.
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.
www.national.com
2


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