- 您現在的位置：買賣IC網 > PDF目錄383510 > MAX844ISA (MAXIM INTEGRATED PRODUCTS INC) Low-Noise, Regulated, -2V GaAsFET Bias PDF資料下載
參數資料
| 型號： | MAX844ISA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | Low-Noise, Regulated, -2V GaAsFET Bias |
| 中文描述： | SWITCHED CAPACITOR REGULATOR, 100 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | SOP-8 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 161K |
| 代理商： | MAX844ISA |
_______________General Desc ription
The MAX840/MAX843/MAX844 low-noise, inverting
charge-pump power supplies are ideal for biasing
GaAsFETs in cellular telephone transmitter amplifiers.
They operate with inputs down to 2.5V.
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
2.5V to 10V, and output current is 4mA with V
IN
> 2.7V.
These circuits can operate with small capacitors, as low
as 0.22μF.
An internal linear regulator reduces the MAX840’s out-
put voltage ripple to 1mVp-p. With a well-filtered control
voltage (V
CTRL
), the MAX843/MAX844 also achieve less
than 1mVp-p typical output ripple. Supply current is
750μA, and reduces to less than 1μA in shutdown
(MAX840/MAX843). The MAX844’s unregulated output
is active in shutdown, with the charge pump switching at
20kHz. It provides a low-power LCD supply.
________________________Applic ations
Cellular Phones
GaAsFET Power Amplifier Modules
Personal Communicators, PDAs
Wireless Data Loggers
Continuously Adjustable GaAsFET Bias
LCD-Bias Contrast Control
Regulated Negative Power Supplies
____________________________Features
o
Fixed -2V or Adjustable -0.5V to -9.4V Output
at 4mA (MAX840)
o
2.5V to 10V Input Voltage Range
o
Operate with Small Capacitors (as low as 0.22μF)
o
1mVp-p Output Voltage Ripple
o
Charge-Pump Switching Frequency:
100kHz in Normal Operation
20kHz in Shutdown Mode (MAX844)
o
1μA Max Logic-Level Shutdown Over Temp.
(MAX840/MAX843)
o
Small 8-Pin SO Package
M
Low-Noise, Regulated, -2V GaAsFET Bias
________________________________________________________________ Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
1
( ) ARE FOR MAX843/MAX844
1
2
3
4
8
7
6
5
IN
GND
OUT
FB (CONT)
SHDN
NEGOUT
C1-
C1+
MAX840
MAX843
MAX844
SO
TOP VIEW
__________________Pin Configuration
MAX840
FB
OUT
SHDN
NEGOUT
C1-
C1+
IN
GND
V
IN
= 2.5V to 10.0V
(3 CELLS)
0.22
μ
F
V
OUT
= -2.0V
(V
GG
of GaAsFET)
4.7
μ
F
0.22
μ
F
0.22
μ
F
ON/OFF
__________Typic al Operating Circ uit
19-0388; Rev 1; 3/96
PART
MAX840
C/D
MAX840ISA
MAX840ESA
MAX843
C/D
MAX843ISA
MAX843ESA
MAX844
C/D
MAX844ISA
MAX844ESA
-40°C to +85°C
0°C to +70°C
-25°C to +85°C
-40°C to +85°C
0°C to +70°C
-25°C to +85°C
-40°C to +85°C
-25°C to +85°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
Dice*
8 SO
8 SO
Dice*
8 SO
8 SO
Dice*
8 SO
8 SO
EVALUATION KIT MANUAL
FOLLOWS DATA SHEET
______________Ordering Information
*Dice are specified at T
A
= +25°C only.
相關PDF資料 |
PDF描述 |
|---|---|
| MAX843ESA | RES 37.4-OHM 1% 0.063W 100PPM THK-FILM SMD-0402 TR-7-PA2MM |
| MAX843ISA | Low-Noise, Regulated, -2V GaAsFET Bias |
| MAX844EVKIT | 8-Channel.CMOS RF Video Multiplexer[MAX310/MAX311/MAX310/MAX311/MAX310/MAX311/MAX310C/D/MAX310CPE/MAX310CWN/MAX310CWN-T/MAX310EJE/MAX310EPE/MAX310EWN/MAX310EWN-T/MAX310MJE/MAX310MJE/883B/MAX310MJE/HR/5962-9455601M2C/5962-9455601MEA/MAX311C/D/MAX311CPE/MAX311CWN/MAX311CWN-T/MAX311EJE/MAX311EPE/MAX311EWN/MAX311EWN-T/MAX311MJE/MAX311MJE/883B/MAX311MJE/HR/5962-9455602M2C/5962-9455602MEA] |
| MAX845EVKIT | Evaluation Kit for the MAX845 |
| MAX845LESA | Interface IC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX844ISA+ | 功能描述:電荷泵 Regulated -2V GaAsFET Bias RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| MAX844ISA+T | 功能描述:電荷泵 Regulated -2V GaAsFET Bias RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| MAX844ISA-T | 功能描述:電荷泵 RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| MAX845C/D | 功能描述:功率驅動器IC Isolated Transformer Driver PCMCIA RoHS:否 制造商:Micrel 產品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX845C/D+ | 功能描述:功率驅動器IC RoHS:否 制造商:Micrel 產品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
發布緊急采購，3分鐘左右您將得到回復。