lm2738xsdx National Semiconductor Corporation, lm2738xsdx Datasheet - Page 2

• Manufacturer Part Number: lm2738xsdx
• Description: Lm2738 550khz/1.6mhz 1.5a Step-down Dc-dc Switching Regulator
• Manufacturer: National Semiconductor Corporation

www.national.com
Order Number
LM2738XMYX
LM2738YMYX
LM2738XSDX
LM2738YSDX
LM2738XMY
LM2738YMY
Connection Diagrams
Ordering Information
LM2738XSD
LM2738YSD
* Contact the local sales office for the lead-free package.
Pin Descriptions
DAP
5, 7
Pin
1
2
3
4
6
8
NS Package Number SDA08A
Frequency
0.55MHz
0.55MHz
1.6MHz
1.6MHz
Option
8-Pin LLP - TOP VIEW
8-Lead eMSOP
Package Type
8-Lead LLP
BOOST
Name
GND
GND
V
SW
V
EN
FB
CC
IN
30049161
NSC Package
Drawing
MUY08A
SDA08A
Boost voltage that drives the internal NMOS control switch. A
bootstrap capacitor is connected between the BOOST and SW pins.
Supply voltage for output power stage. Connect a bypass capacitor
to this pin. Must tie pins 2 and 3 together at package.
Input supply voltage of the IC. Connect a bypass capacitor to this pin.
Must tie pin 2 and 3 together at the package.
Enable control input. Logic high enables operation. Do not allow this
pin to float or be greater than V
Signal and power ground pins. Place the bottom resistor of the
feedback network as close as possible to these pins.
Feedback pin. Connect FB to the external resistor divider to set output
voltage.
Output switch. Connects to the inductor, catch diode, and bootstrap
capacitor.
Signal and power ground. Must be connected to GND on the PCB.
2
Package Marking
NS Package Number MUY08A
8-Pin eMSOP - TOP VIEW
L237B
L174B
STDB
SJBB
Function
IN
+ 0.3V.
1000 Tape and Reel
4500 Tape and Reel
1000 Tape and Reel
4500 Tape and Reel
1000 Tape and Reel
3500 Tape and Reel
1000 Tape and Reel
3500 Tape and Reel
Supplied As
30049163