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PDF RT9222 Data sheet ( Hoja de datos )
| Número de pieza | RT9222 | |
| Descripción | Programmable Synchronous PWM Buck Converter | |
| Fabricantes | Richtek | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RT9222 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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RT9222
Programmable Synchronous PWM Buck Converter with
Dual Adjustable Low Dropout Linear Regulator Controller
General Description
The RT9222 integrates a PWM controller and two
low-dropout linear regulators into a single chip. The
PWM controller provides the CPU core voltage
controlled by a 5-bit DAC and the linear section
regulates power for GTL bus, clock driver or other
circuits on motherboards. The PWM controller
provides an adjustable Intel-compatible 1.3V~3.5V
output voltage. The synchronous N-MOSFET driver
with 200 KHz switching frequency optimizes the
efficiency, device size, and cost built-in over–voltage
and current-limiting protection prevent the CPU from
damage. Power-good signal is sent when the core
voltage is within ±10% of the setting point.
The linear section is a low dropout regulator which
drives low cost NPN transistors. The output level is
user-adjustable and can be programmed by two
external resistors and the internal 1.265V reference.
Ordering Information
RT9222
Package type
S : SOP-24
Operating temperature range
C: Commercial standard
Features
z Provides 3 Regulated Voltages
z N-MOSFET Driver for High Efficiency Switching
Section
z Power-good, Over-voltage, and Current-
limiting Protection for Switching Section
z Adjustable Output Voltage for Linear Section
z Linear Section Uses Low Cost NPN Transistor
as Power Device
z TTL-compatible 5-bit DAC Core Output Voltage
Applications
z Power Supply for Pentium, Pentium ProTM,
Pentium IITM, PowerPCTM, K6TM, 6x86TM, and
AlphaTM Microprocessors
z High-power 5V to 3.xV DC-DC Regulators
z Low-voltage Distributed Power Supplies
z Programmable Power Supplies
Pin Configurations
Part Number
Pin Configurations
RT9222CS
TOP VIEW
GND 1
(Plastic SOP-24) GATE1 2
LDOS1 3
LDOS2 4
VCC 5
OVP 6
PGOOD 7
CSN 8
CSP 9
PGNDH 10
DH 11
PGNDL 12
24 GATE2
23 LDOV
22 VID0
21 VID1
20 VID2
19 VID3
18 VID4
17 VSEN
16 SHDN
15 BSTH
14 BSTL
13 DL
DS9222-04 May 2001
www.richtek-ic.com.tw
1
1 page  
RT9222
Test
Output Voltage
Table 1 Output Voltage Program
Conditions
VID
43210
Min
IO = 2A in application circuit
01111
1.281
01110
1.330
01101
1.379
01100
1.428
01011
1.478
01010
1.527
01001
1.576
01000
1.625
00111
1.675
00110
1.724
00101
1.773
00100
1.822
00011
1.871
00010
1.921
00001
1.970
00000
2.019
11111
1.960
11110
2.058
11101
2.156
11100
2.254
11011
2.352
11010
2.450
11001
2.548
11000
2.646
10111
2.744
10110
2.842
10101
2.940
10100
3.038
10011
3.136
10010
3.234
10001
3.332
10000
3.430
Typ
1.300
1.350
1.400
1.450
1.500
1.550
1.600
1.650
1.700
1.750
1.800
1.850
1.900
1.950
2.000
2.050
2.000
2.100
2.200
2.300
2.400
2.500
2.600
2.700
2.800
2.900
3.000
3.100
3.200
3.300
3.400
3.500
Max
1.320
1.370
1.421
1.472
1.523
1.573
1.624
1.675
1.726
1.776
1.827
1.878
1.929
1.979
2.030
2.081
2.040
2.142
2.244
2.346
2.448
2.550
2.652
2.754
2.856
2.958
3.060
3.162
3.264
3.366
3.468
3.570
Units
V
DS9222-04 May 2001
www.richtek-ic.com.tw
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet RT9222.PDF ] | |
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