lm22680mrx-adj National Semiconductor Corporation, lm22680mrx-adj Datasheet - Page 4

• Manufacturer Part Number: lm22680mrx-adj
• Description: 2a Simple Switcher ?step-down Voltage Regulator With Features
• Manufacturer: National Semiconductor Corporation

www.national.com
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability
and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in
the recommended Operating Ratings is not implied. The recommended Operating Ratings indicate conditions at which the device is functional and should not be
operated beyond such conditions.
Note 2: The absolute maximum specification of the ‘SW to GND’ applies to DC voltage. An extended negative voltage limit of -10V applies to a pulse of up to 50
ns.
Note 3: ESD was applied using the human body model, a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin.
Note 4: Typical values represent most likely parametric norms at the conditions specified and are not guaranteed.
Note 5: Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are guaranteed through correlation using Statistical
Quality Control (SQC) methods. Limits are used to calculate National’s Average Outgoing Quality Level (AOQL).
Note 6: The value of θ
range from 42 to 115°C/W depending on the amount of PCB copper dedicated to heat transfer.
Typical Performance Characteristics
12V, T
J
= 25°C.
Current Limit vs Temperature
JA
Efficiency vs I
V
for the PSOP-8 exposed pad (MR) package of 60°C/W is valid if package is mounted to 1 square inch of copper. The θ
OUT
= 3.3V, f
O
OUT
= 500 kHz
and V
IN
30080727
30080703
4
Unless otherwise specified the following conditions apply: Vin =
Normalized Switching Frequency vs Temperature
Normalized R
DS(ON)
vs Temperature
30080704
30080708
JA
value can