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參數(shù)資料
| 型號： | ML6554IU |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | 3A Bus Termination Regulator |
| 中文描述： | BUS TERMINATOR SUPPORT CIRCUIT, PDSO16 |
| 封裝： | PLASTIC, SOP-16 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 386K |
| 代理商： | ML6554IU |
www.fairchildsemi.com
REV. 1.1.3 3/8/02
Features
Can source and sink up to 3A, no heat sink required
Integrated Power MOSFETs
Generates termination voltages for DDR SDRAM,
SSTL-2 SDRAM, SGRAM, or equivalent memories
Generates termination voltages for active termination
schemes for DDR SDRAM, GTL+, Rambus, VME,
LV-TTL, HSTL, PECL and other high speed logic
V
REF
input available for external voltage divider
Separate voltages for V
CCQ
Buffered V
REF
output
V
OUT
of ±3% or less at 3A
Minimum external components
Shutdown for standby or suspend mode operation
0° to +70°C and -40° to +85°C temperature ranges
available
Thermal Shutdown
≈
130oC
and PV
DD
Description
The ML6554 switching regulator is designed to convert volt-
age supplies ranging from 2.3V to 4V into a desired output
voltage or termination voltage for various applications. The
ML6554 can be implemented to produce regulated output
voltages in two different modes. In the default mode, when
the V
REF
pin is open, the ML6554 output voltage is 50% of
the voltage applied to V
CCQ
. The ML6554 can also be used
to produce various user-defined voltages by forcing a voltage
on the VREF
IN
pin. In this case, the output voltage follows
the input VREF
IN
voltage. The switching regulator is capa-
ble of sourcing or sinking up to 3A of current while regulat-
ing an output V
TT
voltage to within 3% or less.
The ML6554, used in conjunction with series termination
resisitors, provides an excellent voltage source for active
termination schemes of high speed transmission lines as
those seen in high speed memory buses and distributed
backplane designs. The voltage output of the regulator can
be used as a termination voltage for other bus interface
standards such as DDR SDRAM, SSTL, CMOS, Rambus
GTL+, VME, LV-CMOS, LV-TTL, HSTL and PECL.
,
Block Diagram
VL2
AGND
13
VREFIN
VREFOUT
11
6
VDD
1
SHDN
12
PVDD2
PVDD1
7
VL1
3
+
–
–
+
AV
CC
VCCQ
15
OSCILLATOR/
RAMP
GENERATOR
S
R
Q
Q
(VOUT)
(VOUT)
PGND1
DGND
VFB
PGND2
2
4
5
8
VDD
9
14
10
VREF BUFFER
ERROR AMP
RAMP
COMPARATOR
+
–
16
200k
200k
ML6554
3A Bus Termination Regulator
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML6554IU_Q | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 3A Bus Termination RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| ML6554IUX | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 3A Bus Termination RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| ML6599 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Hot-Insertable Active SCSI Terminator |
| ML6599CS | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Hot-Insertable Active SCSI Terminator |
| ML6599CT | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Hot-Insertable Active SCSI Terminator |
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