LM22680MRX-ADJ/NOPB National Semiconductor, LM22680MRX-ADJ/NOPB Datasheet - Page 3

• 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

VIN to GND
EN Pin Voltage
SS, RT/SYNC Pin Voltage
SW to GND
BOOT Pin Voltage
FB Pin Voltage
Power Dissipation
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
junction temperature (T
correlation. Typical values represent the most likely parametric norm at T
only. Unless otherwise specified: V
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.
Symbol
V
R
T
T
I
F
V
OFFMIN
ENHYST
STDBY
I
DS(ON)
ONMIN
V
V
T
BIAS
SYNC
SYNC
θ
I
I
I
I
f
CL
I
EN
SS
SD
FB
Q
O
EN
JA
L
(Note
Parameter
Feedback Voltage
Quiescent Current
Standby Quiescent Current
Current Limit
Output Leakage Current
Switch On-Resistance
Oscillator Frequency
Minimum Off-time
Minimum On-time
Feedback Bias Current
Enable Threshold Voltage
Enable Voltage Threshold
Hysteresis
Enable Input Current
Synchronization Frequency
Synchronization Threshold
Voltage
Soft-Start Current
Thermal Shutdown
Threshold
Thermal Resistance
JA
2)
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
J
) range of -40°C to +125°C. Minimum and Maximum limits are guaranteed through test, design, or statistical
IN
= 12V.
Conditions
V
V
EN Pin = 0V
V
V
V
Falling
EN Input = 0V
V
MR Package, Junction to ambient
temperature resistance
Internally Limited
IN
FB
IN
SW
FB
SYNC
Limits in standard type are for T
= 4.7V to 42V
= 42V, EN Pin = 0V, V
= 5V
= 1.3V
= -1V
(Note
-0.5V to 6V
-0.5V to 7V
-0.5V to 7V
= 3.5V, 50% duty-cycle
-5V to V
V
SW
1)
+ 7V
43V
IN
3
(Note
Junction Temperature
Soldering Information
ESD Rating
Storage Temperature Range
Supply Voltage (V
Junction Temperature Range
Operating Ratings
SW
Infrared (5 sec.)
Human Body Model
= 0V
6)
A
= T
J
J
= 25°C only; limits in boldface type apply over the
= 25°C, and are provided for reference purposes
(Note
1.266/1.259
(Note
2.32
Min
400
100
1.3
30
IN
3)
)
5)
(Note
1.285
1.75
Typ
500
200
100
230
150
3.4
2.8
0.2
0.1
0.2
1.6
0.6
25
50
60
6
1
(Note
4)
1)
1.304/1.311
0.24/0.32
(Note
Max
-65°C to +150°C
-40°C to +125°C
600
300
3.4
1.9
40
70
6
2
3
5)
JA
www.national.com
4.5V to 42V
value can
150°C
260°C
±2 kV
Units
°C/W
MHz
kHz
mA
µA
µA
µA
nA
µA
µA
°C
ns
ns
Ω
V
A
V
V
V