Electronic Components Datasheet Search
Selected language     English  ▼


MIC2172_05 Datasheet(PDF) 2 Page - Micrel Semiconductor

Part No. MIC2172_05
Description  100kHz 1.25A Switching Regulators
Download  17 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
Logo 

 
 2 page
background image
MIC2172/3172
Micrel, Inc.
M9999-042205
2
April 2005
Ordering Information
Part Number
Temperature
Standard
Pb-Free
Range
Package
MIC2172BN
MIC2172YN
–40°C to +85°C
8-pin plastic DIP
MIC2172BM
MIC2172YM
–40°C to +85°C
8-lead SOIC
MIC3172BN
MIC3172YN
–40°C to +85°C
8-pin plastic DIP
MIC3172BM
MIC3172YM
–40°C to +85°C
8-lead SOIC
8-lead SOIC (M)
1
2
3
4
S GND
COMP
P GND 1
FB
*SYNC/EN
VSW
VIN
P GND 2
8
7
6
5
MIC2172*/3172
Pin Configuration
1
2
3
4
S GND
COMP
P GND 1
FB
*SYNC/EN
VSW
VIN
P GND 2
8
7
6
5
MIC2172*/3172
Pin Description
Pin Number
Pin Name
Pin Function
1S GND
Signal Ground: Internal analog circuit ground. Connect directly to the input
filter capacitor for proper operation (see applications info). Keep separate
from power grounds.
2
COMP
Frequency Compensation: Output of transconductance type error amplifier.
Primary function is for loop stabilization. Can also be used for output voltage
soft-start and current limit tailoring.
3FB
Feedback: Inverting input of error amplifier. Connect to external resistive
divider to set power supply output voltage.
4 (MIC2172)
SYNC
Synchronization/Frequency Adjust: Capacitively coupled input signal greater
than device’s free running frequency (up to 135kHz) will lock device’s
oscillator on falling edge. Oscillator frequency can be trimmed up to 135kHz
by adding a resistor to ground. If unused, pin must float (no connection).
4 (MIC3172)
EN
Enable: Apply TTL high or connect to V
IN to enable the regulator. Apply
TTL low or connect to ground to disable the regulator. Device draws only
leakage current (<1µA) when disabled.
5V
IN
Supply Voltage: 3.0V to 40V
6P GND 2
Power Ground #2: One of two NPN power switch emitters with 0.3Ω current
sense resistor in series. Required. Connect to external inductor or input
voltage ground depending on circuit topology.
7V
SW
Power Switch Collector: Collector of NPN switch. Connect to external
inductor or input voltage depending on circuit topology.
8P GND 1
Power Ground #1: One of two NPN power switch emitters with 0.3Ω current
sense resistor in series. Optional. For maximum power capability connect
to P GND 2. Floating pin reduces current limit by a factor of two.
8-pin DIP (N)




Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17 


Datasheet Download



Related Electronics Part Number

Part NumberComponents DescriptionHtml ViewManufacturer
MC79L00100 mA Negative Voltage Regulators 1 2 3 4 5 MoreON Semiconductor
L7900_07Negative voltage regulators 1 2 3 4 5 MoreSTMicroelectronics
LT1054_06SWITCHED-CAPACITOR VOLTAGE CONVERTERS WITH REGULATORS 1 2 3 4 5 MoreTexas Instruments
CS20011.2 A Switching Regulator and 5.0 V 100 mA Linear Regulator with RESET 1 2 3 4 5 MoreON Semiconductor
HA16341NTRedundant Secondary Switching Power Supply Controller 1 2 3 4 5 MoreHitachi Semiconductor
MA57Si Epitaxial Planar Band Switching Diode 1 2 3 4 5 MorePanasonic Semiconductor
PS2503-1LOW INPUT CURRENT HIGH SPEED SWITCHING MULTI PHOTOCOUPLER SERIES 1 2 3 4 5 MoreNEC
SC2453High Performance Quad Output Switching Regulator 1 2 3 4 5 MoreSemtech Corporation
BCM5632E12 GIGABIT + 1 10-GIGABIT SWITCHING PROCESSOR 1 2 Broadcom Corporation.
HVU145Silicon Epitaxial Planar Pin Diode for Antenna Switching 1 2 3 4 5 MoreRenesas Technology Corp

Link URL

Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Bookmark   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com 2003 - 2017    


Mirror Sites
English : Alldatasheet.com  , Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp  |   Russian : Alldatasheetru.com
Korean : Alldatasheet.co.kr   |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com  |   Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl