RT9218PS RICHTEK [Richtek Technology Corporation], RT9218PS Datasheet - Page 4

• Manufacturer Part Number: RT9218PS
• Description: 5V/12V Synchronous Buck PWM DC-DC and Linear Power Controller
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT9218
Timing Diagram
www.richtek.com
4
Function Block Diagram
PGOOD
DRV
FBL
FB
FSB_VTT (1.2V @ 5Amp)
(3V_Logic & 3VDD_Analog)
Bias & Regulators
VCC
+
-
VTT_GD
0.64V
0.64V
Specific Power Sequence for LDO
90%
Reference
+
+
-
-
+
+
-
GM
1-10ms
0.8V
UV_S
UV_L
REF
EO
Fault Logic
Power On
Soft-Start
Reset
VCC
&
(300k/600kHz)
Oscillator
GND
+
+
-
OC
PH_M
EN
-
+
Gate Control
+
-
+
-
0.4V
3V
+
-
Logic
0.15V
1.5V
40uA
<1ms
80%
DS9218-08 March 2007
VCC
OPS
BOOT
UGATE
PHASE
LGATE