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參數(shù)資料
| 型號： | LM22680QMRE-ADJ |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3.4 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | PLASTIC, SOP-8 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大?。?/td> | 595K |
| 代理商： | LM22680QMRE-ADJ |
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
VIN to GND
43V
EN Pin Voltage
-0.5V to 6V
SS, RT/SYNC Pin Voltage
-0.5V to 7V
SW to GND (Note 2)
-5V to V
IN
BOOT Pin Voltage
V
SW + 7V
FB Pin Voltage
-0.5V to 7V
Power Dissipation
Internally Limited
Junction Temperature
150°C
Soldering Information
Infrared (5 sec.)
260°C
ESD Rating (Note 3)
Human Body Model
±2 kV
Storage Temperature Range
-65°C to +150°C
Operating Ratings (Note 1)
Supply Voltage (V
IN)
4.5V to 42V
Junction Temperature Range
-40°C to +125°C
Electrical Characteristics Limits in standard type are for T
J = 25°C only; limits in boldface type apply over the
junction temperature (T
J) range of -40°C to +125°C. Minimum and Maximum limits are guaranteed through test, design, or statistical
correlation. Typical values represent the most likely parametric norm at T
A = TJ = 25°C, and are provided for reference purposes
only. Unless otherwise specified: V
IN = 12V.
Symbol
Parameter
Conditions
Min
(Note 5)
Typ
Max
Units
V
FB
Feedback Voltage
V
IN = 4.7V to 42V
1.266/1.259
1.285
1.304/1.311
V
I
Q
Quiescent Current
V
FB = 5V
3.4
6
mA
I
STDBY
Standby Quiescent Current
EN Pin = 0V
25
40
A
I
CL
Current Limit
2.32
2.8
3.4
A
I
L
Output Leakage Current
V
IN = 42V, EN Pin = 0V, VSW = 0V
0.2
2
A
V
SW = -1V
0.1
3
A
R
DS(ON)
Switch On-Resistance
0.2
0.24/0.32
f
O
Oscillator Frequency
400
500
600
kHz
T
OFFMIN
Minimum Off-time
100
200
300
ns
T
ONMIN
Minimum On-time
100
ns
I
BIAS
Feedback Bias Current
V
FB = 1.3V
230
nA
V
EN
Enable Threshold Voltage
Falling
1.3
1.6
1.9
V
ENHYST
Enable Voltage Threshold
Hysteresis
0.6
V
I
EN
Enable Input Current
EN Input = 0V
6
A
F
SYNC
Synchronization Frequency
V
SYNC = 3.5V, 50% duty-cycle
1
MHz
V
SYNC
Synchronization Threshold
Voltage
1.75
V
I
SS
Soft-Start Current
30
50
70
A
T
SD
Thermal Shutdown
Threshold
150
°C
θ
JA
Thermal Resistance
MR Package, Junction to ambient
temperature resistance (Note 6)
60
°C/W
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 k
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
JA 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 θJA value can
range from 42 to 115°C/W depending on the amount of PCB copper dedicated to heat transfer.
3
www.national.com
LM22680/LM22680Q
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