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LM2671N-12 데이터시트(PDF) 5 Page - Texas Instruments

부품명 LM2671N-12
상세설명  LM2671 SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage
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LM2671
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SNVS008K – SEPTEMBER 1998 – REVISED APRIL 2013
All Output Voltage Versions
Specifications with standard type face are for TJ = 25°C, and those in bold type face apply over full Operating Temperature
Range. Unless otherwise specified, VIN = 12V for the 3.3V, 5V, and Adjustable versions and VIN = 24V for the 12V version,
and ILOAD = 100 mA.
Symbol
Parameters
Conditions
Typ
Min
Max
Units
DEVICE PARAMETERS
IQ
Quiescent Current
VFEEDBACK = 8V
2.5
3.6
mA
For 3.3V, 5.0V, and ADJ Versions
VFEEDBACK = 15V
2.5
mA
For 12V Versions
ISTBY
Standby Quiescent Current
ON/OFF Pin = 0V
50
100/150
μA
ICL
Current Limit
0.8
0.62/0.575
1.2/1.25
A
IL
Output Leakage Current
VIN = 40V, ON/OFF Pin = 0V
1
25
μA
VSWITCH = 0V
VSWITCH = −1V, ON/OFF Pin = 0V
6
15
mA
RDS(ON)
Switch On-Resistance
ISWITCH = 500 mA
0.25
0.40/0.60
Ω
fO
Oscillator Frequency
Measured at Switch Pin
260
225
275
kHz
D
Maximum Duty Cycle
95
%
Minimum Duty Cycle
0
%
IBIAS
Feedback Bias Current
VFEEDBACK = 1.3V ADJ Version Only
85
nA
VS/D
ON/OFF Pin Voltage Thesholds
1.4
0.8
2.0
V
IS/D
ON/OFF Pin Current
ON/OFF Pin = 0V
20
7
37
μA
FSYNC
Synchronization Frequency
VSYNC = 3.5V, 50% duty cycle
400
kHz
VSYNC
Synchronization Threshold
1.4
V
Voltage
VSS
Soft-Start Voltage
0.63
0.53
0.73
V
ISS
Soft-Start Current
4.5
1.5
6.9
μA
θJA
Thermal Resistance
P Package, Junction to Ambient (1)
95
°C/W
D Package, Junction to Ambient (1)
105
(1)
Junction to ambient thermal resistance with approximately 1 square inch of printed circuit board copper surrounding the leads. Additional
copper area will lower thermal resistance further. See Application Information section in the application note accompanying this
datasheet and the thermal model in LM267X Made Simple version 6.0 software. The value
θJ−A for the WSON (NHN) package is
specifically dependent on PCB trace area, trace material, and the number of layers and thermal vias. For improved thermal resistance
and power dissipation for the WSON package, refer to Application Note AN-1187 SNOA401.
Copyright © 1998–2013, Texas Instruments Incorporated
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