RT8287A Просмотр технического описания (PDF) - Richtek Technology
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RT8287A Datasheet PDF : 14 Pages
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RT8287A
Pin No.
Pin Name
Pin Function
11
VCC
Bias Supply. Decouple with 0.1μF to 0.22μF capacitor. The capacitance should be
no more than 0.22μF.
12, 13
15 (Exposed
Pad)
GND
Ground. The exposed pad must be soldered to a large PCB and connected to GND
for maximum power dissipation.
14
AGND Analog Ground. Connect this pin to the system ground in PCB layout.
Function Block Diagram
VIN
EN
VCC
PGOOD
FB
SS
1.2V
Shutdown
Comparator
+
Regulator
-
Ramp
Generator
VA
5k
-
VC
1µA
+ Lockout
3V
Comparator
1.7V
Oscillator
500kHz
Current Sense
Amplifier -
+
VA
S
Q
+
R
-
PWM
Comparator
Driver
+ Reference
-
VC
10µA
Error
+ Amplifier
+
-
30pF 400k
1pF
BOOT
SW
GND
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS8287A-03 June 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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