LM22680MRX-ADJ/NOPB National Semiconductor, LM22680MRX-ADJ/NOPB Datasheet - Page 2

• Manufacturer Part Number: LM22680MRX-ADJ/NOPB
• Description: IC REG SW BUCK 2.0A ADJ 8-PSOP
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r
• Type: Step-Down (Buck)r

Specifications of LM22680MRX-ADJ/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: Adj to 1.285V
• Current - Output: 2A
• Frequency - Switching: 200kHz ~ 1MHz
• Voltage - Input: 4.5 ~ 42 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-PSOP
• For Use With: LM22680EVAL/NOPB - BOARD EVAL FOR LM22680
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: LM22680MRX-ADJ

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Voltage
Output
Connection Diagram
Ordering Information
*Automotive Grade (Q) product incorporates enhanced manufacturing and support processes for the automotive market, including defect detection methodologies.
Reliability qualification is compliant with the requirements and temperature grades defined in the AEC-Q100 standard. Automotive grade products are identified
with the letter Q. For more information go to http://www.national.com/automotive.
Pin Descriptions
Pin
ADJ
ADJ
ADJ
ADJ
ADJ
ADJ
1
2
3
4
5
6
7
8
RT/SYNC Oscillator frequency adjust pin or
BOOT
Name
GND
VIN
SW
SS
FB
EN
LM22680QMRE-ADJ
LM22680QMRX-ADJ
LM22680QMR-ADJ
LM22680MRE-ADJ
LM22680MRX-ADJ
LM22680MR-ADJ
Order Number
Description
Bootstrap input
Soft-start pin
frequency synchronization
Feedback pin
Precision enable pin
System ground
Source input voltage
Switch pin
PSOP-8 Exposed Pad
PSOP-8 Exposed Pad
Package Type
8-Lead Plastic PSOP-8 Package
NS Package Number MRA08B
Application Information
Provides the gate voltage for the high side NFET.
An external capacitor and an internal 50 µA current source set the time
constant for the rise of the error amplifier reference. Pin can be left floating
and internal soft-start will be default.
A resistor connected from this pin to GND adjusts the oscillator frequency.
This pin can also accept an input for synchronization from an external
clock. Pin can be left floating and internal setting will be default to 500 kHz.
Inverting input to the internal voltage error amplifier.
When pulled low regulator turns off.
Provide good capacitive decoupling between VIN and this pin.
Input to the regulator. Operates from 4.5V to 42V.
Attaches to the switch node.
NSC Package
2
MRA08B
MRA08B
Drawing
30080740
2500 Units in Tape and
2500 Units in Tape and
250 Units in Tape and
250 Units in Tape and
95 Units in Rails
95 Units in Rails
Supplied As
Reel
Reel
Reel
Reel
Grade Production Flow*
qualified. Automotive
AEC-Q100 Grade 1
Features