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MAX840ESA PDF预览

MAX840ESA

更新时间: 2024-11-22 22:36:23
品牌 Logo 应用领域
美信 - MAXIM 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管输出元件
页数 文件大小 规格书
10页 162K
描述
Low-Noise, Regulated, -2V GaAsFET Bias

MAX840ESA 技术参数

是否无铅:含铅是否Rohs认证:不符合
生命周期:Obsolete零件包装代码:SOIC
包装说明:SOP-8针数:8
Reach Compliance Code:not_compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.15
Is Samacsys:N其他特性:ALSO ADJUSTABLE OUTPUT FROM -0.5 TO -9.4V
模拟集成电路 - 其他类型:SWITCHED CAPACITOR REGULATOR最大输入电压:10 V
最小输入电压:2.5 V标称输入电压:3.6 V
JESD-30 代码:R-PDSO-G8JESD-609代码:e0
长度:4.9 mm湿度敏感等级:1
功能数量:1端子数量:8
最高工作温度:85 °C最低工作温度:-40 °C
最大输出电流:0.004 A标称输出电压:-2 V
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装等效代码:SOP8,.25封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):245
认证状态:Not Qualified座面最大高度:1.75 mm
子类别:Other Analog ICs最大供电电流 (Isup):1.1 mA
表面贴装:YES切换器配置:DOUBLER INVERTER
最大切换频率:100 kHz技术:CMOS
温度等级:INDUSTRIAL端子面层:Tin/Lead (Sn/Pb)
端子形式:GULL WING端子节距:1.27 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:3.9 mmBase Number Matches:1

MAX840ESA 数据手册

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19-0388; Rev 1; 3/96  
Lo w -No is e , Re g u la t e d , -2 V Ga As FET Bia s  
03/MAX84  
_______________Ge n e ra l De s c rip t io n  
____________________________Fe a t u re s  
The MAX840/MAX843/MAX844 low-nois e , inve rting  
c ha rg e -p ump p owe r s up p lie s a re id e a l for b ia s ing  
GaAsFETs in cellular telephone transmitter amplifiers.  
They operate with inputs down to 2.5V.  
Fixed -2V or Adjustable -0.5V to -9.4V Output  
at 4mA (MAX840)  
2.5V to 10V Input Voltage Range  
The MAX840 offers both a -2V preset output and a -0.5V  
to -9.4V adjustable output. The MAX843/MAX844 use  
an external positive control voltage to set the negative  
output voltage. Input voltage range for all the devices is  
Operate with Small Capacitors (as low as 0.22µF)  
1mVp-p Output Voltage Ripple  
Charge-Pump Switching Frequency:  
100kHz in Normal Operation  
2.5V to 10V, and output current is 4mA with V > 2.7V.  
IN  
These circuits can operate with small capacitors, as low  
as 0.22µF.  
20kHz in Shutdown Mode (MAX844)  
An internal linear regulator reduces the MAX840s out-  
put voltage ripple to 1mVp-p. With a well-filtered control  
1µA Max Logic-Level Shutdown Over Temp.  
(MAX840/MAX843)  
voltage (V ), the MAX843/MAX844 also achieve less  
CTRL  
Small 8-Pin SO Package  
than 1mVp-p typical output ripple. Supply current is  
750µA, a nd re d uc e s to le s s tha n 1µA in s hutd own  
(MAX840/MAX843). The MAX844s unregulated output  
is active in shutdown, with the charge pump switching at  
20kHz. It provides a low-power LCD supply.  
______________Ord e rin g In fo rm a t io n  
PART  
TEMP. RANGE  
0°C to +70°C  
PIN-PACKAGE  
Dice*  
8 SO  
________________________Ap p lic a t io n s  
Cellular Phones  
MAX840C/D  
MAX840ISA  
MAX840ESA  
MAX843C/D  
MAX843ISA  
MAX843ESA  
MAX844C/D  
MAX844ISA  
MAX844ESA  
-25°C to +85°C  
-40°C to +85°C  
0°C to +70°C  
GaAsFET Power Amplifier Modules  
Personal Communicators, PDAs  
Wireless Data Loggers  
Continuously Adjustable GaAsFET Bias  
LCD-Bias Contrast Control  
8 SO  
Dice*  
8 SO  
-25°C to +85°C  
-40°C to +85°C  
0°C to +70°C  
8 SO  
Dice*  
8 SO  
Regulated Negative Power Supplies  
-25°C to +85°C  
-40°C to +85°C  
8 SO  
__________Typ ic a l Op e ra t in g Circ u it  
* Dice are specified at T = +25°C only.  
A
V
IN  
= 2.5V to 10.0V  
(3 CELLS)  
__________________P in Co n fig u ra t io n  
0.22µF  
IN  
C1+  
C1-  
TOP VIEW  
V
= -2.0V  
OUT  
0.22µF  
(V of GaAsFET)  
GG  
MAX840  
OUT  
FB  
1
2
3
4
8
7
6
5
C1+  
C1-  
IN  
4.7µF  
NEGOUT  
GND  
OUT  
MAX840  
MAX843  
MAX844  
0.22µF  
NEGOUT  
SHDN  
FB (CONT)  
ON/OFF  
SHDN  
SO  
GND  
( ) ARE FOR MAX843/MAX844  
________________________________________________________________ Maxim Integrated Products  
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800  

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