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参数资料
| 型号： | A8284SLB |
| 元件分类： | 稳压器 |
| 英文描述： | 0.73 A SWITCHING REGULATOR, 384 kHz SWITCHING FREQ-MAX, PDSO22 |
| 封装： | POWER, SOIC-24 |
| 文件页数： | 1/8页 |
| 文件大小： | 156K |
| 代理商： | A8284SLB |
CONT
ACT
FACT
OR
Y
See
A8283SB
&
A8283SLB
Data
Sheet
27448.1
8284
TWO-OUTPUT LNB SUPPLY AND
CONTROL-VOLTAGE REGULATOR
Always order by complete part number, e.g., A8284SLB .
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VIN .......................... 47 V
Output Current, IO .... Internally Limited
Logic Input Voltage Range,
VI ................................... -0.5 V to +7 V
Flag Output Voltage, VOLF .................. 7 V
Operating Temperature Range,
TA ............................... -20°C to +85°C
Storage Temperature Range,
TS ............................. -40°C to +150°C
FEATURES
s
Complete Interface for Two LNBs Remote Supply and Control
s
LNB Selection and Stand-By Function
s
Built-In Tone Oscillator Factory Trimmed to 22 kHz, Facilitates
DiSEqC (a trademark of EUTELSAT) Encoding
s
Full Modulation With No Load
s
Tracking Switch-Mode Power Converter for Lowest Dissipation
s
Externally Adjustable Short-Circuit Protection
s
LNB Short-Circuit Protection and Diagnostics
s
Auxiliary Modulation Input
s
Cable Length Compensation
s
Internal Over-Temperature Protection
This device incorporates features that have patents pending.
Intended for analog and digital satellite receivers, the low noise block
converter regulator (LNBR) is a monolithic linear and switching voltage
regulator designed to provide power and interface signals to the LNB
downconverter via the coaxial cable. Because most satellite receivers have two
antenna ports, the output voltage of the regulator is available at one of two
logic-selectable output terminals (LNBA, LNBB). If the device is in stand-by
mode (EN terminal LOW), both regulator outputs are disabled, allowing the
antenna downconverters to be supplied and controlled by other satellite
receivers sharing the same coaxial cable. Similar single-output devices, with a
bypass function for slave operation in single-dish dual-receiver systems, are the
A8283SB/SLB.
The regulator outputs are set to 12, 13, 18, or 20 V by the VSEL terminals.
Additionally, it is possible to increase the selected voltage by 1 V to compen-
sate for the voltage drop in the coaxial cable (LLC terminal HIGH).
The LNBR combines a tracking switching regulator and low-noise linear
regulators. Logic inputs (VSEL0, VSEL1, and LLC) select the desired output
voltage. A tracking current-mode buck converter provides the linear regulator
input voltage that is set to the output voltage plus typically 0.8 V. This
maintains constant voltage drop across the linear regulators while permitting
adequate voltage range for tone injection.
The device is supplied in a 24-pin plastic DIP with batwing tabs
(A8284SB), or a 24-lead SOIC power-tab package (A8284SLB). In both cases,
the power tab is at ground potential and needs no electrical isolation.
Note that the A8284SB (dual in-line package)
and A8284SLB (small-outline IC package) are
electrically identical and share a common
terminal number assignment.
A8284SLB (SOIC)
23
17
8
1
2
3
4
5
6
7
9
12
16
14
13
24
22
21
20
19
18
11
10
9
EXTM
VINT
PUMPX
VPUMP
CPUMP
GND
ENT
EN
VSEL0
VSEL1
LLC
OSEL
OLF
VBULK
LNBB
NC
GND
SENSE
LNBA
LX
VIN
TCAP
CHARGE
PUMP
VOLTAGE
CONTROL
REG.
BUCK
Dwg. PP-072-1A
15
ADVANCE INFORMATION
(Subject to change without notice)
May 30, 2002
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A8285 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:LNB Supply and Control Voltage Regulator |
| A8285SLB | 功能描述:IC REG LNB SUPPLY/CTRL 16-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| A8285SLB-T | 制造商:Allegro MicroSystems LLC 功能描述: |
| A8285SLBTR | 功能描述:IC REG LNB SUPPLY/CTRL 16-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| A8285SLBTR-T | 功能描述:IC LNB SUPPLY/VOLTAGE REG 16SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:2,000 系列:- 应用:控制器，DSP 输入电压:4.5 V ~ 25 V 输出数:2 输出电压:最低可调至 1.2V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:30-TFSOP（0.173"，4.40mm 宽） 供应商设备封装:30-TSSOP 包装:带卷 (TR) |
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