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RT9259GS датащи(PDF) 3 Page - Richtek Technology Corporation

номер детали RT9259GS
подробное описание детали  12V Synchronous Buck PWM DC-DC and Linear Power Controller
PDF  15 Pages
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производитель  RICHTEK [Richtek Technology Corporation]
домашняя страница  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9259GS датащи(HTML) 3 Page - Richtek Technology Corporation

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RT9259
3
DS9259-03T00
August 2007
www.richtek.com
Function Block Diagram
Driver
Logic
GND
LGATE
BOOT
UGATE
PHASE
Soft-Start
&
Fault Logic
Oscillator
Power
On Reset
VCC12
FB
Voltage
Reference
Bias
EA
+
-
PWM
+
-
+
POR
SSE
5V
Regulator
+
-
+
-
+
-
+
VCC12
0.4V
FBL
DRV
RT_DIS
Shutdown
Inhibit
SSE
COMP
PGND
-
+
5VDD
+
-
PH_M
OC
40uA
1.5V
V
REF1
V
REF2
0.4V
R
OCSET
20k
Pin No.
RT9259 S RT9259 A
RT9259PQV
Pin Name
Pin Function
6
6
4
FBL
Linear regulator feedback voltage. This pin is the 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
7
VCC12
Connect this pin to a well-decoupled 12V bias supply. It is
also the positive supply for the lower gate driver, LGATE.
9, 10
11, 12
6, 8, 9, 10,
Exposed Pad (17)
NC
No Internal Connection.
11
13
11
LGATE
Lower gate driver output. Connect to the gate of the
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
13
PHASE
Connect this pin to the source of the upper MOSFET and
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
16
14
UGATE
Connect this pin to a well-decoupled 12V bias supply. It is
also the positive supply for the lower gate driver, LGATE.



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