RT9218GS Richtek USA Inc, RT9218GS Datasheet - Page 4

• Manufacturer Part Number: RT9218GS
• Description: IC CTRLR PWM SYNC BUCK 14SOP
• Manufacturer: Richtek USA Inc

Specifications of RT9218GS

• Topology: Step-Down (Buck) Synchronous (1), Linear (LDO) (1)
• Function: Any Function
• Number Of Outputs: 2
• Frequency - Switching: 300kHz
• Voltage/current - Output 1: Controller
• Voltage/current - Output 2: Controller
• W/led Driver: No
• W/supervisor: No
• W/sequencer: No
• Voltage - Supply: 5V, 12V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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