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參數(shù)資料
| 型號： | RT9210GC |
| 廠商： | Richtek Technology Corporation |
| 英文描述： | Dual 5V Synchronous Buck DC-DC PWM Controller for DDR Memory VDDQ and VTT Termination |
| 中文描述： | 雙5V的同步降壓型DC - DC PWM控制器，用于DDR內(nèi)存VDDQ和VTT終端 |
| 文件頁數(shù)： | 1/17頁 |
| 文件大小： | 360K |
| 代理商： | RT9210GC |
RT9210
Preliminary
DS9210-05 March 2007
1
www.richtek.com
Applications
z
DDR Memory Termination Supply
z
SSTL_2 and SSTL_3 Interfaces
z
Graph Card, Motherboard, Desktop Servers
z
High Power Tracking DC-DC Regulators
Dual 5V Synchronous Buck DC-DC PWM Controller
for DDR Memory V
DDQ
and V
TT
Termination
General Description
The RT9210 is a dual high power, high efficiency
synchronous buck DC-DC controller optimized for high
performance double data rate (DDR) memory applications.
It is designed to convert voltage supplies ranging from
4.5V to 5.5V into efficiently 2.5V
DDQ
for powering DDR
memory, V
TT
for signal termination and a buffered amplifier
for V
REF
reference. V
TT
tracks (V
DDQ
/2) to ±30mV, and
V
TT
accurately tracks V
REF
. The RT9210 integrates all of
the control, output adjustment, monitoring and protection
functions into a single package.
The V
TT
supply can be turned off independently of V
DDQ
during S3 sleep mode, the V
TT
output is maintained by a
low power window regulator when V2_SD pin being
triggered high.
The RT9210 provides simple, single feedback loop, voltage
mode control with fast transient response for V
DDQ
regulator. The V
TT
regulator features internal compensation
that eases the circuitry design. It includes two phase-
locked 300kHz sawtooth-wave oscillators which are placed
90° to minimize interference between the two PWM
regulators.
The RT9210 protects against over-current conditions by
inhibiting PWM operation. It also monitors the current in
the V
DDQ
regulator by using the R
DS(ON)
of the upper
MOSFET which eliminates the need for a current sensing
resistor.
Features
z
Operating with Single 5V Supply Voltage
z
High Power V
DDQ
, V
TT
and V
REF
for DDR Memory
z
V
TT
Tracks (V
DDQ
/2) to ±30mV
z
V
TT
Regulator Internally Compensated
z
Support
“
S3
”
Sleep Mode
z
Drives All Low Cost N-MOSFETs
z
Voltage Mode PWM Control
z
300kHz Fixed Frequency Oscillator
z
Fast Transient Response :
Full 0% to 100% Duty Ratio
z
Internal Soft-Start
z
Adaptive Non-Overlapping Gate Driver
z
Over-Current Fault Monitor on V
CC
, No Current
Sense Resistor Required
z
RoHS Compliant and 100% Lead (Pb)-Free
Pin Configurations
(TOP VIEW)
TSSOP-24 & SOP-24
UGATE1
BOOT1
PHASE1
VREF
FB1
COMP1
SENSE1
VREF_IN
GNDA
V2_SD
PGOOD
OCSET/SD
PVCC1
PGND1
LGATE1
NC
SENSE2
NC
VCC
LGATE2
NC
BOOT2
UGATE2
PGND2
4
5
6
7
8
9
10
11
12
19
18
20
21
16
15
17
13
14
2
3
22
23
24
Ordering Information
RT9210
Package Type
C : TSSOP-24
S : SOP-24
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Note :
RichTek Pb-free and Green products are :
`
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
`
Suitable for use in SnPb or Pb-free soldering processes.
`
100% matte tin (Sn) plating.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| RT9210PS | 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 |
| RT9212 | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Dual 5V Synchronous Buck PWM DC-DC and Linear Power Controller |
| RT9212GC | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Dual 5V Synchronous Buck PWM DC-DC and Linear Power Controller |
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