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| 型号： | MAX686EEE |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST INV +/-27.5V 16QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | 升压（升压），反相 |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | ±27.5V |
| 输入电压： | 2.7 V ~ 5.5 V |
| 频率 - 开关： | 300kHz |
| 电流 - 输出： | 100mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 16-QSOP |
| 其它名称： | Q1752000 |
19-1327; Rev 1; 2/98
ATION
EVALU
AVAIL
KIT
ABLE
DAC-Controlled Boost/Inverter
LCD Bias Supply with Internal Switch
General Description
The MAX686 DAC-controlled boost/inverter IC converts
a positive input voltage to a positive or negative LCD
bias voltage up to +27.5V or -27.5V. The device features
an internal N-channel MOSFET switch, programmable
current limiting, and an internal 6-bit digital-to-
analog converter (DAC) for digital adjustment of the
output voltage. It comes in a small 16-pin QSOP pack-
age (same size as an 8-pin SO).
The MAX686 uses a current-limited, pulse-frequency-
modulation (PFM) control scheme to provide high effi-
ciency over a wide range of load conditions. Its high
switching frequency (up to 300kHz) allows the use of
small external components.
An LCDON output allows the LCD bias voltage to be
automatically disabled when the display logic voltage is
removed, protecting the display. The MAX686 has a
+2.7V to +5.5V input voltage range for the IC, and a
____________________________Features
o Internal 500mA, 28V N-Channel Switch
(no external FET required)
o Adjustable Output Voltage to +27.5V or -27.5V
o 6-Bit DAC-Controlled Output Voltage
o Up to 90% Efficiency
o Small 16-Pin QSOP Package
(Same size as 8-pin SO)
o Power-OK Indicator
o 65μA Quiescent Current
o 1.5μA Shutdown Current
o Up to 300kHz Switching Frequency
Ordering Information
+0.8V to +27.5V input voltage range for the inductor.
Typical quiescent supply current is 65μA. Shutdown
current is 1.5μA.
The MAX686 offers high-level integration to save space,
PART
MAX686C/D
MAX686EEE
TEMP. RANGE
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
Dice*
16 QSOP
reduce power consumption, and increase battery life,
making it an excellent choice for battery-powered
portable equipment. The MAX629 is similar to the
MAX686, except that it does not contain a built-in DAC.
Both devices have evaluation kits to facilitate designs.
Applications
Positive or Negative LCD Bias
* Dice are specified at T A = +25°C, DC parameters only.
Functional Diagram appears at end of data sheet.
Typical Operating Circuit
Personal Digital Assistants
Notebook Computers
V IN = 0.8V TO 27.5V
22 μ H
MBR0530L
V OUT
Portable Data-Collection Terminals
Palmtop Computers
Varactor Tuning Diode Bias
Pin Configuration
V CC = 2.7V TO 5.5V
0.1 μ F
V CC
V DD
LX
DACOUT
R3
R2
TOP VIEW
LCDON
PGND 1
UP 2
16 LX
15 N.C.
FB
DN 3
POL 4
V DD 5
MAX686
14 LCDON
13 GND
12 V CC
DAC CONTROL
ON/OFF
UP
DN
SHDN
MAX686
POK
REF
R1
ISET 6
SHDN 7
DACOUT 8
11 POK
10 FB
9
REF
POL
GND
ISET
PGND
0.1 μ F
QSOP
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX686EEE+ | 功能描述:直流/直流开关转换器 Boost Inverter LCD Bias Supply RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX686EEE+T | 功能描述:直流/直流开关转换器 Boost Inverter LCD Bias Supply RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX686EEE-T | 功能描述:直流/直流开关转换器 Boost Inverter LCD Bias Supply RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX686EVKIT | 功能描述:直流/直流开关转换器 Evaluation Kit for the MAX686 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX6870ETJ | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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