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LM3674MFX-1.8 датащи(PDF) 5 Page - Texas Instruments

номер детали LM3674MFX-1.8
подробное описание детали  LM3674 2MHz, 600mA Step-Down DC-DC Converter in SOT-23
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LM3674MFX-1.8 датащи(HTML) 5 Page - Texas Instruments

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LM3674
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SNVS405F – DECEMBER 2005 – REVISED MAY 2013
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
Parameter
Test 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
See (6)
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 (7)
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 specified by design, test or statistical analysis. Typical numbers 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.
(6)
For the ADJ version the resistor dividers should be selected such that at the desired output voltage, the voltage at the FB pin is 0.5V.
(7)
Refer to datasheet curves for closed loop data and its variation with regards to supply voltage and temperature. Electrical Characteristic
table reflects open loop data (FB=0V and current drawn from SW pin ramped up until cycle by cycle current limit is activated). Closed
loop current limit is the peak inductor current measured in the application circuit by increasing output current until output voltage drops
by 10%.
Dissipation Rating
over operating free-air temperature range (unless otherwise noted)
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
Copyright © 2005–2013, Texas Instruments Incorporated
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