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LM3674 Fiches technique(PDF) 4 Page - Texas Instruments

No de pièce LM3674
Description  2MHz, 600mA Step-Down DC-DC Converter in SOT 23-5
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

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LM3674
SNVS405E – DECEMBER 2005 – REVISED SEPTEMBER 2006
www.ti.com
Electrical Characteristics
(1) (2) (3)
Limits in standard typeface are for TJ = 25°C. Limits in boldface type apply over the full operating junction temperature range
(
−30°C ≤ TJ ≤ 125°C). Unless otherwise noted, specifications apply to the LM3674 with VIN = EN = 3.6V
Symbol
Parameter
Condition
Min
Typ
Max
Units
VFB
Feedback Voltage (4) (5)
IO = 10mA
-4
+4
%
Line Regulation
2.7V
≤ VIN ≤ 5.5V
0.083
%/V
IO = 100 mA
Load Regulation
100 mA
≤ IO ≤ 600 mA
0.0010
%/mA
VIN = 3.6V
VREF
Internal Reference Voltage
(Note 7)
0.5
V
ISHDN
Shutdown Supply Current
EN = 0V
0.01
1
µA
IQ
DC Bias Current into VIN
No load, device is not switching
300
600
µA
(FB=0V)
RDSON (P)
Pin-Pin Resistance for PFET
ISW = 200mA
380
500
m
RDSON (N)
Pin-Pin Resistance for NFET
ISW = 200mA
250
400
m
ILIM
Switch Peak Current Limit
Open Loop (Note 8)
830
1020
1200
mA
VIH
Logic High Input
1.0
V
VIL
Logic Low Input
0.4
V
IEN
Enable (EN) Input Current
0.01
1
µA
FOSC
Internal Oscillator Frequency
PWM Mode
1.6
2
2.6
MHz
(1)
All voltages are with respect to the potential at the GND pin.
(2)
Min and Max limits are guaranteed by design, test or statistical analysis. Typical numbers are not guaranteed, but do represent the most
likely norm.
(3)
The parameters in the electrical characteristic table are tested at VIN = 3.6V unless otherwise specified. For performance over the input
voltage range refer to datasheet curves.
(4)
ADJ configured to 1.5V output.
(5)
For VOUT less than 2.5V, VIN = 3.6V, for VOUT greater than or equal to 2.5V, VIN = VOUT +1.
Dissipation Rating Table
θJA
TA ≤ 25°C (Power Rating)
TA = 60°C (Power Rating)
TA = 85°C (Power Rating)
250°C/W (2 layer board)
400mW
260mW
160mW
130°C/W (4 layer board)
770mW
500mW
310mW
4
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