Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF HTML

US2076 Datasheet(PDF) 4 Page - UNISEM

Part No. US2076
Description  PWM SWITCHER CONTROLLER & 7.5A ADJUSTABLE LOW DROPOUT REGULATOR COMBO
Download  4 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  UNISEM [UNISEM]
Homepage  
Logo 

US2076 Datasheet(HTML) 4 Page - UNISEM

   
Zoom Inzoom in Zoom Outzoom out
 4 / 4 page
background image
US2076
4-4
Rev. 1.3
4/26/98
TYPICAL APPLICATION
TYPICAL APPLICATION
Figure2- Typical application of US2076 in a flexible motherboard with the 4 bit VID output voltage selection. This circuit
uses a single jumper that programs the output voltage in 16 steps with 0.1V steps from 2V to 3.5V, designed for Intel P55
™,P54™,
AMD K5 & K6
™ as well as Cyrix M1™ and M2™ applications. The Vcc2Det pin automatically shuts down the I/O when a single plane
processor is dropped in the socket.
Ref Desig
Description
Qty
Part #
Manufacturer
U1
LDO/Switcher IC
1
US2076CT (TO220)
Unisem
US2076CM (TO263) (note 1)
Q1
MOSFET
1
IRL3303 (TO220)
International
IRL3103S (TO263)
(note 1)
Rectifier
D1
Schottky Diode
1
MBR1045CT (TO220)
Motorola
MBRB1545CT (TO263) (note1)
D2
Diode, GP
1
1N4148
L2
Inductor
1
Core:T50-18,L=4 uH
Micro Metal
Turns: 10T, 18 AWG
(core)
L1
Inductor
1
L=2 uH
R1
Resistor
1
22 ohm,5%, SMT 1206 size
R2
Resistor
1
10 ohm, 5%, SMT 1206 size
R4A
Resistor
1
806 ohm,1%, SMT 0805 size
R4B
Resistor
1
90.9 kohm,1%, SMT 0805 size
R5A
Resistor
1
1.24 kohm,1%, SMT 0805 size
R5B
Resistor
1
2.49 kohm,1%, SMT 0805 size
R5C
Resistor
1
4.99 kohm,1%, SMT 0805 size
R5D
Resistor
1
10 kohm,1%, SMT 0805 size
R5E
Resistor
1
1.30 kohm,1%, SMT 0805 size
R6
Resistor
1
ohm,1%, SMT 0805 size
R7
Resistor
1
ohm,1%, SMT 0805 size
R8
Resistor
1
10 kohm,5%, SMT 0805 size
C3
Capacitor
1
1 uF,Ceramic, SMT 0805 size, Z5U
C1
Capacitor
1
EEUFA1A681L, 680uF,10V, Elect
Panasonic
C4
Capacitor
1
470pF,Ceramic, SMT 0805 size
C2
Capacitor
1
6MV1500GX, 1500uF,6.3V, Elect
Sanyo
C6
Capacitor
1
EEUFA1A681L, 680uF,10V, Elect
Panasonic
C7
Capacitor
4
6MV1500GX, 1500uF,6.3V, Elect
Sanyo
HS1
Heat Sink
1
For MOSFET , 577002
Aavid
HS2
Heat Sink
1
For Schottky Diode , 577002
Aavid
HS3
Heat Sink
1
For US2076 , 507222 (I/O Load Current<5A)
Aavid
576602 (I/O Load Current< 3.5A)
Note 1: For the applications where it is desirable to eliminate the heat sink, the US2076CM for U1 when load current is
less than 1.5A, the IRL3103S for Q2 and MBR1545CT for D1 in TO263 packages with minimum of 1" square copper pad
can be used.
U1
1
2076app2-1.2
12V
5V
C1
L1
R1
Q2
D1
C3
R2
C4
C2
R5A
R5B
R5C
R5D
R5E
C7
L2
C6
R4A
Drv
V12
Vfb1
Gnd
Vfb2
Vout
Vin
1
2
3
4
5
6
7
R7
R6
2
3
4
5
6
7
8
JP1
D2
CPU
I / O
Vcc2 Det
Core
R8
5V
R4B


Html Pages

1  2  3  4 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : 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  |   Vietnamese : Alldatasheet.vn