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LM22670QMR-ADJ Folha de dados(PDF) 4 Page - Texas Instruments

Nome de Peças LM22670QMR-ADJ
Descrição Electrónicos  LM22670/LM22670Q 42V, 3A SIMPLE SWITCHER, Step-Down Voltage Regulator with
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Fabricante Electrônico  TI [Texas Instruments]
Página de início  http://www.ti.com
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LM22670
SNVS584O – SEPTEMBER 2008 – REVISED MARCH 2013
www.ti.com
Electrical Characteristics
Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C
to +125°C. Minimum and Maximum limits are ensured through test, design, or statistical correlation. Typical values represent
the most likely parametric norm at TA = TJ = 25°C, and are provided for reference purposes only. Unless otherwise specified:
VIN = 12V.
Min
Typ
Max
Parameter
Test Conditions
Units
(1)
(2)
(1)
LM22670-5.0
VFB
Feedback Voltage
VIN = 8V to 42V
4.925/4.9
5.0
5.075/5.1
V
LM22670-ADJ
VFB
Feedback Voltage
VIN = 4.7V to 42V
1.266/1.259
1.285
1.304/1.311
V
All Output Voltage Versions
IQ
Quiescent Current
VFB = 5V
3.4
6
mA
ISTDBY
Standby Quiescent Current
EN Pin = 0V
25
40
µA
ICL
Current Limit
3.4/3.35
4.2
5.3/5.5
A
IL
Output Leakage Current
VIN = 42V, EN Pin = 0V, VSW = 0V
0.2
2
µA
VSW = -1V
0.1
3
µA
RDS(ON)
Switch On-Resistance
PFM Package
0.12
0.16/0.22
SO PowerPAD-8 Package
0.10
0.16/0.20
fO
Oscillator Frequency
400
500
600
kHz
TOFFMIN
Minimum Off-time
100
200
300
ns
TONMIN
Minimum On-time
100
ns
IBIAS
Feedback Bias Current
VFB = 1.3V (ADJ Version Only)
230
nA
VEN
Enable Threshold Voltage
Falling
1.3
1.6
1.9
V
VENHYST
Enable Voltage Hysteresis
0.6
V
IEN
Enable Input Current
EN Input = 0V
6
µA
FSYNC
Maximum Synchronization
VSYNC = 3.5V, 50% duty-cycle
1
MHz
Frequency
VSYNC
Synchronization Threshold
1.75
V
Voltage
TSD
Thermal Shutdown Threshold
150
°C
θJA
Thermal Resistance
TJ Package, Junction to ambient
22
°C/W
thermal resistance (3)
θJA
Thermal Resistance
MR Package, Junction to ambient
60
°C/W
thermal resistance (4)
(1)
Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation
using Statistical Quality Control (SQC) methods. Limits are used to calculate TI's Average Outgoing Quality Level (AOQL).
(2)
Typical values represent most likely parametric norms at the conditions specified and are not ensured.
(3)
The value of
θJA for the PFM package of 22°C/W is valid if package is mounted to 1 square inch of copper. The θJA value can range
from 20 to 30°C/W depending on the amount of PCB copper dedicated to heat transfer. See application note AN-1797 SNVA328 for
more information.
(4)
The value of
θJA for the SO Power PAD-8 exposed pad 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.
4
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