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| 型号： | MAX8719ETA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LINEAR LP HV 8-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 控制器，笔记本电脑电源系统 |
| 输入电压： | 4 V ~ 28 V |
| 输出数： | 1 |
| 输出电压： | 1.24 V ~ 28 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WDFN 裸露焊盘 |
| 供应商设备封装： | 8-TDFN-EP（3x3） |
| 包装： | 带卷 (TR) |
19-3495; Rev 0; 11/04
High-Voltage, Low-Power Linear Regulators for
Notebook Computers
General Description
The MAX8718/MAX8719 are micropower, 8-pin TDFN
linear regulators that supply always-on, keep-alive
power to CMOS RAM, real-time clocks (RTC), and
microcontrollers in systems with high-voltage batteries.
The circuits consist of a 100mA linear regulator and a
power-good comparator (PGOOD) with fixed-output
delay. Key features include wide input voltage range,
low-dropout voltage, and low-quiescent supply current.
Despite a miserly 25μA (max) no-load quiescent cur-
rent, the MAX8718/MAX8719 have good line- and load-
transient response and excellent AC power-supply
rejection. They provide a clean fixed 5V or 3.3V output
(MAX8718), or an adjustable 1.24V to 28V output
(MAX8719), even when subjected to fast supply-volt-
age changes that occur during the switchover from bat-
tery to AC-adapter input power. The space-saving
TDFN package has excellent thermal characteristics
and tolerates up to 1951mW of power dissipation.
Internal foldback current limiting and thermal shutdown
protect the regulator from overload and thermal faults.
Features
? 4V to 28V Input Range
? 18μA Quiescent Supply Current
? <3μA Shutdown Supply Current
? 100mA Output Current
? 3.3V or 5V, Pin-Selectable Output (MAX8718)
? Adjustable 1.24V to 28V Output (MAX8719)
? ±2% Output Accuracy
? Thermal-Overload Protection
? Delayed Power-Good Output
? Thermally Enhanced 8-Pin TDFN Package
Ordering Information
In addition to the main notebook-computer application,
these devices are useful in other low-power, high-volt-
PART
TEMP RANGE PIN-PACKAGE
OUTPUT
VOLTAGE
age applications (4V < V IN < 28V) such as smart batter-
ies, current control loops, telecom emergency power,
and housekeeping power for off-line supplies.
The MAX8718/MAX8719 are available in a thermally
enhanced 3mm x 3mm, 8-lead TDFN package.
MAX8718 ETA -40 ° C to +85 ° C
MAX8719 ETA -40 ° C to +85 ° C
8 TDFN 3mm x
3mm
8 TDFN 3mm x
3mm
3.3V/5V
Adjustable
CMOS/RTC Backup Power
Microcontroller Power
Notebook Computers
Applications
TOP VIEW
Pin Configuration
Smart-Battery Packs
IN 1
8 OUT
PDAs and Handy-Terminals
Battery-Powered Systems
GND 2
5/3 (FB) 3
V CC 4
MAX8718
MAX8719
7 I.C.
6 SHDN
5 PGOOD
TDFN
3mm × 3mm
() ARE FOR THE MAX8719.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
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