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參數(shù)資料
| 型號(hào)： | RT9241A |
| 文件頁數(shù)： | 1/18頁 |
| 文件大小： | 333K |
| 代理商： | RT9241A |
RT9241A/B
DS9241AB-01 October 2002
www.richtek.com
1
Two-Phase DC/DC Controller for CPU Core Power Supply
General Description
The RT9241A/B is a two-phase buck DC/DC
controller integrated with all control functions for high
performance processor VRM. The RT9241A/B
drives 2 buck switching stages operating in 180
degree phase shift. The two-phase architecture
provides high output current while maintaining low
power dissipation on power devices and low stress
on input and output capacitors. The high equivalent
operating frequency also reduces the component
dimension and the output voltage ripple in load
transient.
RT9241A/B regulates both easily set voltage and
current loops. Precise current sharing for power stage
is achieved by differential input current sense and
processing circuit. The settings of current sense,
droop tuning and over current protection are
independent to compensation circuit of voltage loop.
The feature greatly facilitates the flexibility of CPU
power supply design and tuning.
The RT9241A/B uses a 5-bit DAC of 1.1V to 1.85V
(25mV/step)
output
with
compensation to meet the strict VRM transient
requirement. The IC monitors the VCORE voltage for
PGOOD and over voltage protection. Soft start, over
current protection and programmable under voltage
lockout are also provided to assure the safety of
microprocessor and power system.
load
current
droop
Ordering Information
RT9241A/B
Features
z
Two-Phase Power Conversion
z
VRM 9.0 DAC Output with Active Droop
Compensation for Fast Load Transient
Channel
Current
Differential Sense Input
z
Precise
Sharing
with
z
Hiccup Mode Over Current Protection
z
Programmable Under Voltage Lockout and Soft
Start
z
High Ripple Frequency, (Channel Frequency
Times Channel Number)
z
100KHz Version (RT9241B) for Lower Switching
Loss
Applications
z
Power Supply for Server and Workstation
z
Power Supply for High Current Microprocessor
Pin Configurations
Part Number
Pin Configurations
RT9241A/B CS
(Plastic SOP-20)
TOP VIEW
1
2
3
4
5
6
7
8
9
10
13
14
15
16
17
18
19
20
12
11
VID3
VID2
VID1
VID0
COMP
FB
ADJ
VSEN
VID4
DVD
SS
VDD
PGOOD
ISP1
PWM1
PWM2
ISP2
ISN1
ISN2
GND
Operating temperature range
C: Commercial standard
Package type
S : SOP-20
Operating frequency version
A : 200KHz
B : 100KHz
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RT9241AGS | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Two-Phase DC/DC Controller for CPU Core Power Supply |
| RT9241APS | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Two-Phase DC/DC Controller for CPU Core Power Supply |
| RT9241B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| RT9241BGS | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Two-Phase DC/DC Controller for CPU Core Power Supply |
| RT9241BPS | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Two-Phase DC/DC Controller for CPU Core Power Supply |
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