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| 型号： | MAX1721EUT+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/8页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHED CAP INV SOT23-6 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 切换式电容器（充电泵），反相 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | -1.5 V ~ -5.5 V |
| 输入电压： | 1.5 V ~ 5.5 V |
| 频率 - 开关： | 60kHz ~ 200kHz |
| 电流 - 输出： | 25mA |
| 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： | SOT-23-6 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | SOT-6 |
19-1439; Rev 2; 4/04
SOT23, Switched-Capacitor
Voltage Inverters with Shutdown
General Description
The ultra-small MAX1719/MAX1720/MAX1721 monolithic,
CMOS charge-pump inverters accept input voltages
ranging from +1.5V to +5.5V. The MAX1720 operates at
12kHz, and the MAX1719/MAX1721 operate at 125kHz.
High efficiency, small external components, and logic-
controlled shutdown make these devices ideal for both
battery-powered and board-level voltage conversion
applications.
Oscillator control circuitry and four power MOSFET
switches are included on-chip. A typical MAX1719/
MAX1720/MAX1721 application is generating a -5V
supply from a +5V logic supply to power analog circuitry.
All three parts come in a 6-pin SOT23 package and can
deliver a continuous 25mA output current.
For pin-compatible SOT23 switched-capacitor voltage
inverters without shutdown (5-pin SOT23), see the
MAX828/MAX829 and MAX870/MAX871 data sheets. For
applications requiring more power, the MAX860/MAX861
deliver up to 50mA. For regulated outputs (up to -2 x V IN ),
Features
? 1nA Logic-Controlled Shutdown
? 6-Pin SOT23 Package
? 99.9% Voltage Conversion Efficiency
? 50μA Quiescent Current (MAX1720)
? +1.5V to +5.5V Input Voltage Range
? 25mA Output Current
? Requires Only Two 1μF Capacitors
(MAX1719/MAX1721)
Ordering Information
refer to the MAX868. The MAX860/MAX861 and MAX868
are available in space-saving μMAX packages.
Applications
Local Negative Supply from a Positive Supply
PART
MAX1719 EUT
MAX1720 EUT
MAX1721 EUT
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
6 SOT23-6
6 SOT23-6
6 SOT23-6
SOT
TOP MARK
AACA
AABS
AABT
Small LCD Panels
GaAs PA Bias Supply
Handy-Terminals, PDAs
Battery-Operated Equipment
Typical Operating Circuit
1 μ F
TOP VIEW
Pin Configuration
INPUT
C1+
C1-
NEGATIVE
OUT
1
6
C1+
1.5V to 5.5V
IN
OUT
OUTPUT
-1 · V IN
25mA
IN
2
MAX1719
MAX1720
5
SHDN (SHDN)
MAX1721
1 μ F
MAX1721
ON
SHDN
C1-
3
4
GND
OFF
GND
( ) ARE FOR MAX1719
SOT23-6
________________________________________________________________ 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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