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PDF RT9241 Data sheet ( Hoja de datos )
| Número de pieza | RT9241 | |
| Descripción | Two-Phase DC/DC Controller for CPU Core Power Supply | |
| Fabricantes | ETC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RT9241 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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Preliminary
RT9241
Two-Phase DC/DC Controller for CPU Core Power Supply
General Description
The RT9241 is a two-phase buck DC/DC controller
integrated with all control functions for high
performance processor VRM. The RT9241 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.
RT9241 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 RT9241 uses a 5-bit DAC of 1.1V to 1.85V
(25mV/step) output with load current droop
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.
Ordering Information
RT9241
Package Type
S : SOP-20
Operating temperature range
C: Commercial standard
Features
z Two-Phase Power Conversion
z VRM 9.0 DAC Output with Active Droop
Compensation for Fast Load Transient
z Precise Channel Current Sharing with
Differential Sense Input
z Hiccup Mode Over Current Protection
z Programmable Under Voltage Lockout and
Soft Start
z High Ripple Frequency, (Channel Frequency
200KHz) Times Channel Number
Applications
z Power Supply for Server and Workstation
z Power Supply for High Current Microprocessor
Pin Configurations
Part Number
Pin Configurations
RT9241CS
(Plastic SOP-20)
TOP VIEW
VID4 1
VID3 2
VID2 3
VID1 4
VID0 5
COMP 6
FB 7
ADJ 8
DVD 9
SS 10
20 VDD
19 PGOOD
18 ISP1
17 PWM1
16 PWM2
15 ISP2
14 VSEN
13 GND
12 ISN1
11 ISN2
DS9241-00 November 2001
www.richtek-ic.com.tw
1
1 page  
Typical Application Circuit
Preliminary
RT9241
DS9241-00 November 2001
www.richtek-ic.com.tw
5
5 Page 
Preliminary
Two-Phase Converter and Components Function Grouping
RT9241
Compensation
& Offset
Droop Setting
Driver Power
UVLO
12V
+5V
VDD
VID
COMP
PWM1
ISP1
ISN1
FB
VSEN
ADJ PWM2
RT9241
DVD
ISP2
SS ISN2
GND
VCC BOOT
PVCC UGATE
PHASE
RT9600
PWM LGATE
GND
VCC BOOT
PVCC UGATE
PHASE
RT9600
PWM LGATE
GND
12V
12V
+VCORE
Current Sense
Components
DS9241-00 November 2001
www.richtek-ic.com.tw
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet RT9241.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
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| RT9241B | (RT9241A/B) 2-Phase DC/DC Controller | RichTek Technology |
| RT9241CS | Two-Phase DC/DC Controller for CPU Core Power Supply | ETC |
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