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RT9259C View Datasheet(PDF) - Richtek Technology

Part Name
Description
MFG CO.
RT9259C Datasheet PDF : 15 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
RT9259C
Pin No.
RT9259C…S RT9259C…A RT9259CPQV
Pin
Name
Pin Function
6
6
Linear regulator feedback voltage. This pin is the
4
FBL
inverting input of the LDO error amplifier and protection
monitor. Connect this pin to an external resistor divider
network of the linear regulator.
7
7, 8
5
GND Ground.
8
9, 10
11
9, 10
11, 12
13
7
VCC12
Connect this pin to a well-decoupled 12V bias supply. It is
also the positive supply for the lower gate driver, LGATE.
6, 8, 9, 10,
Exposed Pad (17)
NC
No Internal Connection.
Lower gate driver output. Connect to the gate of the
11
LGATE
low-side power N-MOSFET. This pin is monitored by the
adaptive shoot-through protection circuitry to determine
when the lower MOSFET has turned off.
12
14
12
PGND Power ground return for the lower gate driver.
13
15
14
16
Connect this pin to the source of the upper MOSFET and
13
PHASE
the drain of the lower MOSFET. This pin is monitored by
the adaptive shoot-through protection circuitry to
determine when the upper MOSFET has turned off.
14
UGATE
Connect this pin to a well-decoupled 12V bias supply. It is
also the positive supply for the lower gate driver, LGATE.
Function Block Diagram
FBL
DRV
RT_DIS
GND
Voltage
Bias
Reference
VREF2
VCC12
-
+
+
Inhibit
0.4V
-
+
-
+
Shutdown
VREF1
Oscillator
SSE
+
+ EA
-
Power
On Reset
5V
Regulator
5VDD
POR
OC
+
0.4V
40uA
Soft-Start
-
&
Fault Logic
ROCSET
20k
SSE
PH_M
-
+
1.5V
+
-
PWM
Driver
Logic
FB
COMP
VCC12
BOOT
UGATE
PHASE
LGATE
PGND
DS9259C-03 August 2007
www.richtek.com
3
 

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