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參數(shù)資料
| 型號(hào)： | RT9209GS |
| 廠商： | Richtek Technology Corporation |
| 英文描述： | Synchronous Buck PWM DC-DC with Enable & PGOOD |
| 中文描述： | 同步降壓PWM直流與直流啟用 |
| 文件頁(yè)數(shù)： | 4/14頁(yè) |
| 文件大?。?/td> | 217K |
| 代理商： | RT9209GS |
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RT9209/A
4
DS9209/A-08 March 2007
www.richtek.com
Absolute Maximum Ratings
z
Supply
Input
Voltage, V
CC
------------------------------------------------------------------------------------------- 7V
z
BOOT & UGATE to GND--------------------------------------------------------------------------------------------- 19V
z
Input, Output or I/O Voltage----------------------------------------------------------------------------------------- GND-0.3V to 7V
z
Power Dissipation, P
D
@ T
A
= 25°C
SOP-8-------------------------------------------------------------------------------------------------------------------- 0.625W
z
Package Thermal Resistance
SOP-8,
θ
JA
-------------------------------------------------------------------------------------------------------------- 160°C/W
z
Ambient Temperature Range---------------------------------------------------------------------------------------- 0°C to +70°C
z
Junction Temperature Range---------------------------------------------------------------------------------------- 0
°
C to +125
°
C
z
Storage Temperature Range ----------------------------------------------------------------------------------------
65°C to +150°C
z
Lead Temperature (Soldering, 10 sec.)--------------------------------------------------------------------------- 260°C
CAUTION:
Stresses beyond the ratings specified in
“
Absolute Maximum Ratings
”
may cause permanent damage to the device.
This is a stress only rating and operation of the device at these or any other conditions above those indicated in the
operational sections of this specification is not implied.
Functional Pin Description
FB (Pin1)
This pin is connected to the PWM converter's output divider.
This pin also connects to internal PWM error amplifier
inverting input and protection monitor.
VCC (Pin 2)
This is the main bias supply for the RT9209/A. This pin
also provides the gate bias charge for the lower MOSFETs
gate. The voltage at this pin monitored for power-on reset
(POR) purpose. This pin is also the internal 6.5V regulator
output powered from BOOT pin when BOOT pin is directly
powered from ATX 12V.
LGATE (Pin 3)
Connect LGATE to the PWM converter's lower MOSFET
gate. This pin provides the gate drive for the lower
MOSFET.
GND (Pin 4)
Signal and power ground for the IC. All voltage levels are
measured with respect to this pin.
UGATE (Pin 5)
Connect UGATE pin to the PWM converter's upper
MOSFET gate. This pin provides the gate drive for the
upper MOSFET.
BOOT (Pin 6)
This pin provides ground referenced bias voltage to the
upper MOSFET driver. A bootstrap circuit is used to create
a voltage suitable to drive a logic-level N-Channel
MOSFET when operating at a single 5V power supply.
This pin also could be powered from ATX 12V, in this
situation, a internal 6.5V regulator will supply to VCC pin
for internal voltage bias.
PGOOD (Pin 7)
PGOOD is an open collector output used to indicate the
status of the PWM converter output voltage. This pin is
pulled low when the FB is not over 90% of the reference
voltage.
SS (Pin 8)
Connect a capacitor from this pin to ground. This capacitor,
along with an internal 22
μ
A current source, sets the soft-
start internal of the synchronous PWM converter.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RT9209PS | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Synchronous Buck PWM DC-DC with Enable & PGOOD |
| RT9210 | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Dual 5V Synchronous Buck DC-DC PWM Controller for DDR Memory VDDQ and VTT Termination |
| RT9210GC | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Dual 5V Synchronous Buck DC-DC PWM Controller for DDR Memory VDDQ and VTT Termination |
| RT9210GS | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Dual 5V Synchronous Buck DC-DC PWM Controller for DDR Memory VDDQ and VTT Termination |
| RT9210PC | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Dual 5V Synchronous Buck DC-DC PWM Controller for DDR Memory VDDQ and VTT Termination |
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