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MIC2177-5.0YWMT&R

Description
6A SWITCHING REGULATOR, 240kHz SWITCHING FREQ-MAX, PDSO20
CategoryPower/power management    The power supply circuit   
File Size139KB,13 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Environmental Compliance
Download Datasheet Parametric Compare View All

MIC2177-5.0YWMT&R Overview

6A SWITCHING REGULATOR, 240kHz SWITCHING FREQ-MAX, PDSO20

MIC2177-5.0YWMT&R Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerMicrochip
package instructionSOP,
Reach Compliance Codecompliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage16.5 V
Minimum input voltage4.5 V
Nominal input voltage7 V
JESD-30 codeR-PDSO-G20
JESD-609 codee3
length12.878 mm
Humidity sensitivity level2
Number of functions1
Number of terminals20
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current6 A
Nominal output voltage5 V
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height2.616 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency240 kHz
Temperature levelINDUSTRIAL
Terminal surfaceMATTE TIN
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature40
width7.5 mm
MIC2177
MIC2177
Micrel, Inc.
Micrel
MIC2177
2.5A Synchronous Buck Regulator
General Description
The Micrel MIC2177 is a 200kHz synchronous buck (step-
down) switching regulator designed for high-efficiency, bat-
tery-powered applications.
The MIC2177 operates from a 4.5V to 16.5V input and
features internal power MOSFETs that can supply up to 2.5A
output current. It can operate with a maximum duty cycle of
100% for use in low-dropout conditions. It also features a
shutdown mode that reduces quiescent current to less than
5µA.
The MIC2177 achieves high efficiency over a wide output
current range by switching between PWM and skip mode.
Operating mode is automatically selected according to output
conditions. Switching frequency is preset to 200kHz and can
be synchronized to an external clock signal of up to 300kHz.
The MIC2177 uses current-mode control with internal current
sensing. Current-mode control provides superior line regula-
tion and makes the regulator control loop easy to compen-
sate. The output is protected with pulse-by-pulse current
limiting and thermal shutdown. Undervoltage lockout turns
the output off when the input voltage is less than 4.5V.
The MIC2177 is packaged in a 20-lead wide power SO
package with an operating temperature range of –40°C to
+85°C.
See the MIC2178 for externally selected PWM or skip-mode
operation.
Features
• 4.5V to 16.5V input voltage range
• Dual-mode operation for high efficiency (up to 96%)
PWM mode for > 200mA load current
Skip mode for < 200mA load current
• 100mΩ internal power MOSFETs at 12V input
• 200kHz preset switching frequency
• Low quiescent current
1.0mA in PWM mode
500µA in skip mode
< 5µA in shutdown mode
• 100% duty cycle for low dropout operation
• Current-mode control
Simplified loop compensation
Superior line regulation
• Current limit
• Thermal shutdown
• Undervoltage lockout
Applications
High-efficiency, battery-powered supplies
Buck (step-down) dc-to-dc converters
Cellular telephones
Laptop computers
Hand-held instruments
Battery Charger
Typical Application
V
IN
5.4V to 18V
C1
22µF
35V
ENABLE
20
SHUTDOWN
18
11
U1
1,2,9
VIN
OUT
EN
MIC
SYNC
2177-5.0
AUTO
COMP SGND
2.2
nF
R1
10k
C
C
6.8nF
13
14–17
10
3,8
4–7
12
100
5V Output
Efficiency
L1, 50µH
D1
MBRS130L
95
EFFICIENCY (%)
SW
PGND
FB
BIAS
19
V
OUT
5V/1A
C2
100µF
10V
90
85
80
75
V
IN
= 6V
C3
0.01µF
R1
10k
SKIP
PWM
100
1000 2500
OUTPUT CURRENT (mA)
70
10
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
March 2005
1
M9999-031805

MIC2177-5.0YWMT&R Related Products

MIC2177-5.0YWMT&R MIC2177-5.0YWM MIC2177-5.0YWM-TR MIC2177-3.3YWMT&R
Description 6A SWITCHING REGULATOR, 240kHz SWITCHING FREQ-MAX, PDSO20 voltage regulators - switching regulators 2.5A 200khz synchronous switcher IC REG BUCK 5V 2.5A 20SOIC 6A SWITCHING REGULATOR, 240kHz SWITCHING FREQ-MAX, PDSO20
Is it Rohs certified? conform to conform to conform to conform to
Maker Microchip Microchip Microchip Microchip
package instruction SOP, LEAD FREE, SOP-20 SOP, SOP,
Reach Compliance Code compliant compliant compliant compliant
Analog Integrated Circuits - Other Types SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR
control mode CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 16.5 V 16.5 V 16.5 V 16.5 V
Minimum input voltage 4.5 V 4.5 V 4.5 V 4.5 V
Nominal input voltage 7 V 7 V 7 V 7 V
JESD-30 code R-PDSO-G20 R-PDSO-G20 R-PDSO-G20 R-PDSO-G20
JESD-609 code e3 e3 e3 e3
length 12.878 mm 12.878 mm 12.878 mm 12.878 mm
Humidity sensitivity level 2 1 2 2
Number of functions 1 1 1 1
Number of terminals 20 20 20 20
Maximum operating temperature 85 °C 85 °C 85 °C 85 °C
Minimum operating temperature -40 °C -40 °C -40 °C -40 °C
Maximum output current 6 A 6 A 6 A 6 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SOP SOP SOP SOP
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE
Peak Reflow Temperature (Celsius) 260 250 260 260
Certification status Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height 2.616 mm 2.616 mm 2.616 mm 2.616 mm
surface mount YES YES YES YES
Switch configuration BUCK BUCK BUCK BUCK
Maximum switching frequency 240 kHz 240 kHz 240 kHz 240 kHz
Temperature level INDUSTRIAL INDUSTRIAL INDUSTRIAL INDUSTRIAL
Terminal surface MATTE TIN Matte Tin (Sn) - annealed MATTE TIN MATTE TIN
Terminal form GULL WING GULL WING GULL WING GULL WING
Terminal pitch 1.27 mm 1.27 mm 1.27 mm 1.27 mm
Terminal location DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature 40 40 40 40
width 7.5 mm 7.5 mm 7.5 mm 7.5 mm
ECCN code EAR99 EAR99 - EAR99
Nominal output voltage 5 V - 5 V 3.3 V
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