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MIC4043YM4TR

Description
1-OUTPUT THREE TERM VOLTAGE REFERENCE, 1.245V, PDSO4, LEAD FREE, SOT-143, 4 PIN
CategoryPower/power management    The power supply circuit   
File Size447KB,12 Pages
ManufacturerMicrel ( Microchip )
Websitehttps://www.microchip.com
Environmental Compliance
Download Datasheet Parametric Compare View All

MIC4043YM4TR Overview

1-OUTPUT THREE TERM VOLTAGE REFERENCE, 1.245V, PDSO4, LEAD FREE, SOT-143, 4 PIN

MIC4043YM4TR Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerMicrel ( Microchip )
package instructionTSSOP,
Reach Compliance Codecompliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesTHREE TERMINAL VOLTAGE REFERENCE
JESD-30 codeR-PDSO-G4
JESD-609 codee4
length2.86 mm
Number of functions1
Output times1
Number of terminals4
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output voltage1.2699 V
Minimum output voltage1.2201 V
Nominal output voltage1.245 V
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Maximum seat height1.12 mm
Maximum supply voltage (Vsup)10 V
Minimum supply voltage (Vsup)1.8 V
surface mountYES
Temperature levelINDUSTRIAL
Terminal surfaceNICKEL PALLADIUM GOLD
Terminal formGULL WING
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
Fine-tuning/adjustable outputNO
width1.3 mm
MIC4043
Micrel
MIC4043
Low-Voltage Secondary-Side Shunt Regulator
Final Information
General Description
The MIC4043 is a shunt regulator optimized for secondary-
side regulation in low-voltage power supplies. Featuring an
output stage guaranteed to swing within 400mV of ground,
the MIC4043 can be used in power supplies operating down
to 1.8V, even with optoisolators requiring greater than 1.2V of
headroom.
In power supply applications, the MIC4043 normally drives
the LED of an optically isolated feedback circuit. The MIC4043
monitors a resistively-divided output voltage and sinks error
current through the optoisolator’s LED (secondary side); the
optoisolator’s transistor (primary side) provides this signal to
the controller’s feedback input. The MIC4043 is also practical
for other voltage-monitoring applications requiring an open-
collector output.
The MIC4043 replaces conventional ’431-type shunt regula-
tors to allow low-voltage applications where there is inad-
equate headroom for a 2.5V regulator in series with an
optoisolator. Replacing ’431-type devices requires only a
minor change to the way that the resistive-divider values are
calculated.
Features
• Ideal for 1.8V switching converters
• Low-voltage operation
400mV maximum saturation over
operating temperature range
• Easy to use
voltage in, current out
• 2% voltage tolerance over operating temperature range
Applications
• Optically isolated low-volage power supplies
• Low-voltage discrete regulator control
Typical Application
OPTICAL
ISOLATION
MIC4043
IN SNK
GND FB
V
IN
MIC4043
Low-Side Feedback
Control
COMPENSATION
V
OUT
1
7
R1
R2
2
6
MIC38HC43BN
1
2
3
4
COMP
FB
I
SNS
R
T
/C
T
V
REF
V
DD
V
OUT
GND
8
4
7
6
5
SECONDARY SIDE
Return
3
R2
V
OUT
=
1.245V
+
1
R1
PRIMARY SIDE
200kHz DC-DC Flyback Converter
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
November 2000
1
MIC4043

MIC4043YM4TR Related Products

MIC4043YM4TR MIC4043BM4TR
Description 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 1.245V, PDSO4, LEAD FREE, SOT-143, 4 PIN Three Terminal Voltage Reference, 1 Output, 1.245V, PDSO4, SOT-143, 4 PIN
Is it Rohs certified? conform to incompatible
Maker Micrel ( Microchip ) Micrel ( Microchip )
package instruction TSSOP, TSSOP, TO-253
Reach Compliance Code compliant unknown
ECCN code EAR99 EAR99
Analog Integrated Circuits - Other Types THREE TERMINAL VOLTAGE REFERENCE THREE TERMINAL VOLTAGE REFERENCE
JESD-30 code R-PDSO-G4 R-PDSO-G4
JESD-609 code e4 e0
length 2.86 mm 2.86 mm
Number of functions 1 1
Output times 1 1
Number of terminals 4 4
Maximum operating temperature 85 °C 85 °C
Minimum operating temperature -40 °C -40 °C
Maximum output voltage 1.2699 V 1.2699 V
Minimum output voltage 1.2201 V 1.2201 V
Nominal output voltage 1.245 V 1.245 V
Package body material PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code TSSOP TSSOP
Package shape RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) NOT SPECIFIED 240
Maximum seat height 1.12 mm 1.12 mm
Maximum supply voltage (Vsup) 10 V 10 V
Minimum supply voltage (Vsup) 1.8 V 1.8 V
surface mount YES YES
Temperature level INDUSTRIAL INDUSTRIAL
Terminal surface NICKEL PALLADIUM GOLD TIN LEAD
Terminal form GULL WING GULL WING
Terminal location DUAL DUAL
Maximum time at peak reflow temperature NOT SPECIFIED 30
Fine-tuning/adjustable output NO NO
width 1.3 mm 1.3 mm
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