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LM2758
Connection Diagram
12-Bump Thin Micro SMD
1.514mm x 1.996mm x 0.6mm
NS Package Number TLA12
30045302
Pin Descriptions
Pin
Name
C1
VIN
B2
CPOUT
Description
Supply voltage connection.
Charge pump regulated output. A 2.2 µF ceramic capacitor is required from CPOUT to
GND. Connect flash LED anode to this pin.
B1
C1+
D2
C1−
C2
C2+
D1
C2−
A2
SGND
Analog and control ground for charge pump. This pin should be connected directly to a
low impedance ground plane.
C3
LED−
Regulated current source output. Connect flash LED cathode to this pin.
A1
EN1
B3
EN2
The EN1 and EN2 pins are used to select the modes (Torch, Indictor, Flash), as well as
to put the part into Shutdown mode.
A3
ISET
LED current programming resistor pin. A resistor connected between this pin and GND
are used to set Torch, Flash and Indicator currents.
D3
PGND
Power ground for the charge pump and the current source. This pin should be connected
directly to a low impedance ground plane.
Flying capacitor pins. A 1 µF ceramic capacitor should be connected from C1+ to C1−
and from C2+ to C2−.
Ordering Information
Order Number
Supplied as Tape and Reel (Units)
LM2758TL
www.national.com
250 units, tape and reel
LM2758TLX
3000 units, tape and reel
2
