RT8223L Ver la hoja de datos (PDF) - Richtek Technology
Número de pieza
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Lista de partido
RT8223L Datasheet PDF : 24 Pages
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RT8223L/M
Pin No.
20
Pin Name
PHASE1
21
UGATE1
22
BOOT1
23
PGOOD
24
VOUT1
15,25
(Exposed Pad)
GND
Pin Function
Switch Node for SMPS1. PHASE1 is the internal lower supply rail for the
UGATE1 high side gate driver. PHASE1 is also the current-sense input for the
SMPS1.
Upper Gate Driver Output for SMPS1. UGATE1 swings between PHASE1 and
BOOT1.
Boost Flying Capacitor Connection for SMPS1. Connect to an external capacitor
according to the typical application circuits.
Power Good Output for Channel 1 and Channel 2. (Logical AND).
Bypass Pin for SMPS1. Connect to the SMPS1 output to bypass efficient power
for VREG5 pin. VOUT1 is also for the SMPS1 output soft-discharge.
Ground for SMPS Controller. The exposed pad must be soldered to a large PCB
and connected to GND for maximum power dissipation.
Function Block Diagram
BOOT1
UGATE1
PHASE1
LGATE1
FB1
ENTRIP1
EN
ENC
VOUT1
TONSEL SKIPSEL
VREG5
VREG5
SMPS1
PWM Buck
Controller
10µA
Power-On
Sequence
Clear Fault Latch
SW5 Threshold
Thermal
Shutdown
VREG5
SMPS2
PWM Buck
Controller VREG5
10µA
SW3 Threshold
BOOT2
UGATE2
PHASE2
LGATE2
VOUT2
FB2
ENTRIP2
PGOOD
GND
VREG5
VIN
VREG5
REF
VREG3
VREG3
REF
DS8223L/M-04 April 2011
www.richtek.com
5
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