LT1578IS8 Linear Technology, LT1578IS8 Datasheet - Page 16

IC BUCK SYNC ADJ 1.5A 8SOIC

LT1578IS8

Manufacturer Part Number
LT1578IS8
Description
IC BUCK SYNC ADJ 1.5A 8SOIC
Manufacturer
Linear Technology
Type
Step-Down (Buck)r
Datasheet

Specifications of LT1578IS8

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
Adj to 1.21V
Current - Output
1.5A
Frequency - Switching
200kHz
Voltage - Input
4 ~ 15 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Power - Output
-

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Price
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LT1578/LT1578-2.5
APPLICATIONS
16
AND TERMINATE
TO REGULATOR
(NORMALLY EXISTS AS INTERNAL PLANE)
GROUND RING NEED NOT BE AS SHOWN
DIODE CLOSE
THEM TO THE
SAME POINT
KEEP INPUT
CAPACITOR
AND CATCH
AND BOOST NODE
OF CONNECTIONS
TO SWITCH NODE
MINIMIZE AREA
CAPACITOR DIRECTLY
TO HEAVY GROUND
CONNECT OUTPUT
U
INFORMATION
D1
C3
U
GND
L1
V
IN
SW
C1
W
V
IN
C2
BOOST
Figure 5. Suggested Layout for LT1578
D2
Figure 6. High Speed Switching Path
TAKE OUTPUT DIRECTLY FROM END
OF OUTPUT CAPACITOR TO AVOID
PARASITIC RESISTANCE AND
INDUCTANCE (KELVIN CONNECTION)
V
U
OUT
CIRCULATING
FREQUENCY
SWITCH NODE
PATH
HIGH
SYNC
SHDN
R1
FB
V
L1
GND
C
OF FEEDBACK PIN
TO AVOID PICKUP
MINIMIZE SIZE
CONNECTIONS
R2
C
C
LOAD
1578 F06
5V
R
C
1578 F05
TERMINATE
FEEDBACK
RESISTORS AND
COMPENSATION
COMPONENTS
DIRECTLY TO
SWITCHER
GROUND PIN

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