EEWORLDEEWORLDEEWORLD

Part Number

Search

MIC2179BSMT&R

Description
5.5A SWITCHING REGULATOR, 240kHz SWITCHING FREQ-MAX, PDSO20
CategoryPower/power management    The power supply circuit   
File Size335KB,13 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Download Datasheet Parametric View All

MIC2179BSMT&R Overview

5.5A SWITCHING REGULATOR, 240kHz SWITCHING FREQ-MAX, PDSO20

MIC2179BSMT&R Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerMicrochip
package instructionMO-150, SSOP-20
Reach Compliance Codeunknown
ECCN codeEAR99
Other featuresALSO OPERATES IN ADJUSTABLE MODE FROM 3.14V TO 3.46V
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 codee0
length7.2 mm
Humidity sensitivity level1
Number of functions1
Number of terminals20
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current5.5 A
Nominal output voltage1.245 V
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)240
Certification statusNot Qualified
Maximum seat height2 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency240 kHz
Temperature levelINDUSTRIAL
Terminal surfaceTIN LEAD
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width5.3 mm
Micrel, Inc.
MIC2179
MIC2179
1.5A Synchronous Buck Regulator
General Description
The Micrel MIC2179 is a 200kHz synchronous buck (step-
down) switching regulator designed for high-efficiency, bat-
tery-powered applications.
The MIC2179 operates from a 4.5V to 16.5V input and features
internal power MOSFETs that can supply up to 1.5A 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 MIC2179 achieves high efficiency over a wide output
current range by operating in either PWM or skip mode. The
operating mode is externally selected, typically by an intel-
ligent system, which chooses the appropriate mode according
to operating conditions, efficiency, and noise requirements.
The switching frequency is preset to 200kHz and can be
synchronized to an external clock signal of up to 300kHz.
The MIC2179 uses current-mode control with internal current
sensing. Current-mode control provides superior line regula-
tion and makes the regulator control loop easy to compensate.
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 MIC2179 and is packaged in a 20-lead SSOP package
with an operating temperature range of –40°C to +85°C.
Features
• 4.5V to 16.5V input voltage range
• Dual-mode operation for high efficiency (up to 96%)
PWM mode for > 150mA load current
Skip mode for <150mA load current
• 150mΩ internal power MOSFETs at 12V input
• 200kHz preset switching frequency
• Low quiescent current
1.0mA in PWM mode
600µA in skip mode
< 5µA in shutdown mode
• Current-mode control
Simplified loop compensation
Superior line regulation
• 100% duty cycle for low dropout operation
• 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 16.5V
C1
10µF
20V
Output Good
Output Low
Skip Mode
PWM Mode
U1
15
6
5
13
16,17
R1
20k
EN
PWRGD
PWM
SYNC
VIN
SW
3,4
1,2,
19,20
7
L1
22µH
D1
MBRM120
MIC
2179-3.3
PGND
FB
BIAS
14
9–12
C2
100µF
6.3V
V
OUT
3.3V/600mA
COMP SGND
8
C4
6.8nF
C3
0.01µF
R5
4.02k
Pins 4 and 18 are not connected.
Pins 3 and 4 can be connected
together for a low-impedance
connection.
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
June 2009
1
M9999-063009
Teach you how to pursue the girl you like [reposted, does not represent my opinion]
Haha, I believe that all the IT guys are not good at communication like me. Many times, when I meet a girl I like, I miss her because I am afraid or use the wrong method. Here are some of my own and o...
henryli2008 Talking
How to keep your job in the tide of mass innovation and entrepreneurship
[font=宋体][color=#000]In recent years, "mass innovation, mass entrepreneurship, Internet+" has continued to heat up. Innovation, entrepreneurship and Internet+ are the general trend, providing huge spa...
yunrun Talking about work
EEWORLD University ---- Huijing Electronics Arduino Video Tutorial
Huijing Electronics Arduino video tutorial : https://training.eeworld.com.cn/course/4302? The function of Arduino is to sense the environment through various sensors, and to feedback and influence the...
老白菜 DIY/Open Source Hardware
The program I wrote has a problem on the Aofei Electronics board. Please explain it to the moderator
The procedure is as follows: #include avr/io.h#include avr/interrupt.h#include util/delay.h int main(void){DDRD=0xff;PORTD=0xff; MCUCR|=(1ISC00);GICR|=(1INT0);sei(); while(1){PORTD=0xff;}}SIGNAL(SIG_I...
heningbo Microchip MCU
EK430-RF2500 Application Experience (I)
After reading the key points of the RF2500 pdf:1. Four-wire serial configuration and data interface : CC2500 is configured via a 4- wire SPI compatible interface ( SI, SO, SCLK and CSn ). This interfa...
随风316881400 Microcontroller MCU
【NXP USB Type C Review】Power Analysis
[i=s]This post was last edited by dcexpert on 2016-4-23 17:33[/i] The schematic diagram of the power supply part of the NXP Type C evaluation board is shown in the figure:USB interface power supply:Be...
dcexpert Integrated technical exchanges

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 345  2552  264  2569  2922  7  52  6  59  55 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号