LM2621_05 NSC [National Semiconductor], LM2621_05 Datasheet - Page 4

• Manufacturer Part Number: LM2621_05
• Description: Low Input Voltage, Step-Up DC-DC Converter
• Manufacturer: NSC [National Semiconductor]

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Pin Description
Typical Performance Characteristics
Pin
1
2
3
4
5
6
7
8
PGND
EN
FREQ
FB
SGND
V
BOOT
SW
DD
Name
Efficiency vs Load Current
V
FB
V
vs Temperature
Power Ground
Active-Low Shutdown Input
Frequency Adjust. An external resistor connected between this pin and Pin 6 (V
frequency of the LM2621.
Output Voltage Feedback
Signal Ground
Power Supply for Internal Circuitry
Bootstrap Supply for the Gate Drive of Internal MOSFET Power Switch
Drain of the Internal MOSFET Power Switch
OUT
= 5.0V
10093401
10093403
4
Function
Efficiency vs Load Current
I
OP
vs Temperature
V
OUT
= 3.3V
DD
) sets the switching
10093402
10093404