lm2735xsdx National Semiconductor Corporation, lm2735xsdx Datasheet - Page 3

• Manufacturer Part Number: lm2735xsdx
• Description: 520khz/1.6mhz - Space-efficient Boost And Sepic Dc-dc Regulator
• Manufacturer: National Semiconductor Corporation

Pin Description - 5-Pin SOT23
Pin Description - 6 Pin LLP
Pin Description - 8 Pin eMSOP
DAP
DAP
Pin
Pin
Pin
1
2
3
4
5
1
2
3
4
5
6
1
2
3
4
5
6
7
8
PGND
AGND
PGND
AGND
Name
Name
Name
GND
GND
GND
VIN
SW
VIN
VIN
SW
SW
EN
FB
EN
EN
FB
FB
Function
No Connect
Power ground pin. Place PGND and output capacitor GND close together.
Supply voltage for power stage, and input supply voltage.
Shutdown control input. Logic high enables operation. Do not allow this pin to float or be greater than VIN +
0.3V.
Feedback pin. Connect FB to external resistor divider to set output voltage.
Signal ground pin. Place the bottom resistor of the feedback network as close as possible to this pin & pin 5
Output switch. Connect to the inductor, output diode.
No Connect
Signal & Power ground. Connect to pin 2 & pin 6 on top layer. Place 4-6 vias from DAP to bottom layer GND
plane.
Function
Output switch. Connect to the inductor, output diode.
Signal and power ground pin. Place the bottom resistor of the feedback network as close as possible to this
pin.
Feedback pin. Connect FB to external resistor divider to set output voltage.
Shutdown control input. Logic high enables operation. Do not allow this pin to float or be greater than VIN +
0.3V.
Supply voltage for power stage, and input supply voltage.
Function
Power ground pin. Place PGND and output capacitor GND close together.
Supply voltage for power stage, and input supply voltage.
Shutdown control input. Logic high enables operation. Do not allow this pin to float or be greater than VIN +
0.3V.
Feedback pin. Connect FB to external resistor divider to set output voltage.
Signal ground pin. Place the bottom resistor of the feedback network as close as possible to this pin & pin
4.
Output switch. Connect to the inductor, output diode.
Signal & Power ground. Connect to pin 1 & pin 5 on top layer. Place 4-6 vias from DAP to bottom layer GND
plane.
3
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