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參數(shù)資料
| 型號(hào)： | RT9005A |
| 廠商： | Richtek Technology Corporation |
| 英文描述： | DDR VDDQ and Termination Voltage Regulator |
| 中文描述： | 用于Vddq和終止電壓調(diào)節(jié)器 |
| 文件頁數(shù)： | 2/10頁 |
| 文件大?。?/td> | 217K |
| 代理商： | RT9005A |
RT9005A/B
Preliminary
2
DS9005A/B-01 September 2007
www.richtek.com
Typical Application Circuit
Functional Pin Description
Pin No.
Pin Name
Pin Function
1
BP
Noise Reduction. Connecting a 10nF capacitor to GND to reduce output noise.
Common Ground (The exposed pad must be soldered to a large PCB and
connected to GND for maximum power dissipation). The GND pad are a should be
as large as possible and using many vias to conduct the heat into the buried GND
plate of PCB layer.
Linear Regulator Power Input Voltage.
7,
Exposed Pad (9) GND
2
VIN1
3
VIN2
Input voltage which supplies current to the output pin. Connect this pin to a
well-decoupled supply voltage. To prevent the input rail from dropping during large
load transient, a large, low ESR capacitor is recommended to use. The capacitor
should be placed as close as possible to the VIN2 pin.
4
VCNTL
VCNTL supplies the internal control circuitry and provides the drive voltage. The
driving capability of output current is proportioned to the VCNTL. Connect this pin
to 3.3V bias supply to handle large output current with at least 10uF capacitor from
this pin to GND.
5
VREFEN
Reference voltage input and active low VOUT2 shutdown control pin. Two resistors
dividing down the VIN voltage on the pin to create the regulated output voltage.
Pulling the pin to ground turns off the device by an open-drain, such as 2N7002,
signal N-MOSFET.
Regulator Output. VOUT2 is regulated to REFEN voltage that is used to terminate
the bus resistors. It is capable of sinking and sourcing current while regulating the
output rail. To maintain adequate large signal transient response, typical value of
1000
μ
F AL electrolytic capacitor with 10
μ
F ceramic capacitors are recommended to
reduce the effects of current transients on V
OUT
.
Regulator 2.5V/1.8/1.5V Output.
6
VOUT2
8
VOUT1
Note :
If there is any application need to use 10
μ
F ceramic capacitor in front of R
TT
, please shut one 1000
μ
F (Aluminum
eletrolytic capacitor).
VIN1
VREFEN
GND
VOUT2
RT9005A/B
EN
2N7002
R1
R2
C
SS
1uF
V
IN1
C
47uF
C
470uF
R
TT
C
470uF
GND
VOUT1
C
2.2uF
V
OUT1
7,
Exposed Pad(9)
3
5
8
6
BP
1
VIN2
VCNTL
C
IN1
2.2uF
C
BP
10nF
V
IN2
V
CTNL
= 3.3V
2
4
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| RT9006A | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Dual LDO Regulator with Reset Function |
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