Datasheet > MAX1721

MAX1721

更新时间： 2024-11-22 23:45:51

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
8页	124K
描述
SOT23.Switched-Capacitor Voltage Inverters with Shutdown

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数据手册

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MAX1721 数据手册

19-1439; Rev 1; 5/99

S OT2 3 , S w it c h e d -Ca p a c it o r

Vo lt a g e In ve rt e rs w it h S h u t d o w n

90/MAX721

Ge n e ra l De s c rip t io n

Fe a t u re s

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.

♦ 1nA Logic-Controlled Shutdown

♦ 6-Pin SOT23 Package

♦ 99.9% Voltage Conversion Efficiency

♦ 50µA Quiescent Current (MAX1719/MAX1720)

♦ +1.5V to +5.5V Input Voltage Range

♦ 25mA Output Current

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.

♦ Requires Only Two 1µF Capacitors

(MAX1719/MAX1721)

For pin-compatible SOT23 switched-capacitor voltage

inve rte rs without s hutd own (5-p in SOT23), s e e the

MAX828/MAX829 and MAX870/MAX871 data sheets. For

applications requiring more power, the MAX860/MAX861

Ord e rin g In fo rm a t io n

deliver up to 50mA. For regulated outputs (up to -2 · V ),

refer to the MAX868. The MAX860/MAX861 and MAX868

are available in space-saving µMAX packages.

PIN-

SOT

PART

TEMP. RANGE

PACKAGE TOP MARK

MAX1719EUT -40°C to +85°C 6 SOT23-6

MAX1720EUT -40°C to +85°C 6 SOT23-6

MAX1721EUT -40°C to +85°C 6 SOT23-6

AACA

AABS

AABT

Ap p lic a t io n s

Local Negative Supply from a Positive Supply

Small LCD Panels

GaAs PA Bias Supply

Handy-Terminals, PDAs

Battery-Operated Equipment

P in Co n fig u ra t io n

Typ ic a l Op e ra t in g Circ u it

1µF

TOP VIEW

C1+

C1-

OUT

C1+

NEGATIVE

OUTPUT

INPUT

1.5V to 5.5V

-1 · V

MAX1719

MAX1720

MAX1721

25mA

SHDN (SHDN)

GND

MAX1721

GND

1µF

C1-

SHDN

OFF

SOT23-6

( ) ARE FOR MAX1719

________________________________________________________________ Maxim Integrated Products

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

12 3 4 5 6 7 8

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与MAX1721相关器件

型号	品牌	获取价格	描述	数据表
MAX17211	MAXIM	获取价格	Stand-Alone ModelGauge m5 Fuel Gauge
MAX17211	ADI	获取价格	独立式ModelGauge m5电量计，集成SHA-256认证
MAX17211G	MAXIM	获取价格	Battery charger or power supply
MAX17211G+	MAXIM	获取价格	Power Supply Support Circuit,
MAX17211G+00E	MAXIM	获取价格	Power Supply Support Circuit,
MAX17211G+T0E	MAXIM	获取价格	Power Supply Support Circuit,
MAX17211X	MAXIM	获取价格	Battery charger or power supply
MAX17215	MAXIM	获取价格	Stand-Alone ModelGauge m5 Fuel Gauge
MAX17215	ADI	获取价格	独立式ModelGauge m5电量计，集成SHA-256认证
MAX17215G+	MAXIM	获取价格	Power Supply Support Circuit,

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