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LM3670MFX-ADJ Datasheet(PDF) 6 Page - Texas Instruments

No. de Pieza. LM3670MFX-ADJ
Descripción  LM3670 Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
Descarga  25 Pages
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Fabricante  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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LM3670MFX-ADJ Datasheet(HTML) 6 Page - Texas Instruments

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1 MHz
Oscillator
Soft
Start
Ramp
Generator
+
-
Thermal
Shutdown
Undervoltage
Lockout
VREF
+
-
0.5V
Error
Amp
Control Logic
Driver
Current Limit
Comparator
Ref1
PFM Current
Comparator
Ref2
SW
Zero Crossing
Comparator
FB
EN
VIN
PWM Comparator
pfm_low
pfm_hi
GND
Bandgap
+
-
Vcomp
1.0V
Frequency
Compensation
Adj Version
Fixed Version
LM3670
SNVS250E – NOVEMBER 2004 – REVISED FEBRUARY 2013
www.ti.com
Electrical Characteristics (continued)
Limits in standard typeface are for TJ = 25°C. Limits in boldface type apply over the full operating junction temperature range
(
−40°C ≤ TJ ≤ +125°C). Unless otherwise noted VIN = 3.6V, VOUT = 1.8V, IO = 150mA, EN = VIN
Symbol
Parameter
Condition
Min
Typ
Max
Units
IEN
Enable (EN) Input Current
0.01
1
µA
FOSC
Internal Oscillator Frequency
PWM Mode
550
1000
1300
kHz
Figure 4. Simplified Functional Diagram
6
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Copyright © 2004–2013, Texas Instruments Incorporated
Product Folder Links: LM3670


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