XRP7659 Datasheet, PDF (3/10 Pages) Exar Corporation – 1.5A 18V1.4MHz Non Synchronous Step-Down Regulator

XRP7 65 9
1 .5 A 1 8 V 1 .4 MHz Non Sy n ch r on ou s St ep - Dow n Reg u lat or
BLOCK DIAGRAM
PIN ASSIGNMENT
Fig. 2: XRP7659 Block Diagram
Fig. 3: XRP7659 Pin Assignment
PIN DESCRIPTION
Name
Pin Number
BS
1
GND
2
FB
3
EN
4
IN
5
SW
6
Description
Boots trap pin.
Connect a 10nF b ootstrap capacitor between BS and SW pin s. The voltage across
the bootstrap capacitor drives the internal high
- side MOSFET.
Ground pin.
Feedback pin.
Connect to a resistor divider to program the
output voltage. If V FB exceeds 0.972V
the OVP is triggered. If V FB drops below 0.25V the short circuit protection is
activated .
Enable Input Pin .
Forcing this pin above 1.5V enables the IC. Forcing the pin below 0.4V shuts down
the IC. For automatic HQDEOHFRQQHFWDNŸUHVLVWRUEHWZHHQ
Power Input Pin.
Must be closely decoupled to GND pin with a
10µF/25V or greater ceramic capacitor .
Power switch output pin.
Connect to inductor and bootstrap capacitor.
ORDERING INFORMATION
Part Number
XRP7659IS TR- F
XRP7659EVB
Temperature
Range
Marking
- ƒ&A””7ƒ&
XRP7659 Evaluation Board
LCWW
X
Package
SOT23 - 6
Packing
Quantity
3K/Tape & Reel
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© 2012 Exar Corporation
3/ 10
Note 1
Halogen Free
Note 2
Rev. 1. 2.0