MAX1720EUT

MAX1720EUT Datasheet

MAX1719/MAX1720/MAX1721

Part	Datasheet
MAX1720EUT	MAX1720EUT (pdf)

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MAX1719/MAX1720/MAX1721 SOT23, Switched-Capacitor Voltage Inverters with Shutdown 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 logiccontrolled 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 VIN , refer to the MAX868. The MAX860/MAX861 and MAX868 are available in space-saving µMAX packages. Local Negative Supply from a Positive Supply Small LCD Panels GaAs PA Bias Supply Handy-Terminals, PDAs Battery-Operated Equipment Typical Operating Circuit 1nA Logic-Controlled Shutdown 6-Pin SOT23 Package 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 PART MAX1719EUT MAX1720EUT MAX1721EUT TEMP RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C PINPACKAGE 6 SOT23-6 SOT23-6 SOT23-6 SOT TOP MARK AACA AABS AABT Pin Configuration 1µF INPUT 1.5V to 5.5V C1+ IN C1OUT MAX1721 SHDN NEGATIVE OUTPUT -1 • VIN 25mA 1µF TOP VIEW OUT 1 6 C1+ IN 2 C1- 3 MAX1719 MAX1720 MAX1721 5 SHDN 4 GND ARE FOR MAX1719 SOT23-6 Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at MAX1719/MAX1720/MAX1721 SOT23, Switched-Capacitor Voltage Inverters with Shutdown ABSOLUTE MAXIMUM RATINGS IN to GND to +6V OUT to GND to +0.3V C1+, SHDN, SHDN to GND .........................-0.3V to VIN + 0.3V C1- to - 0.3V to +0.3V OUT Output OUT Short Circuit to Continuous Power Dissipation TA = +70°C 6-Pin SOT23 derate 8.7mW/°C above +70°C .................696mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature Storage Temperature Range .............................-65°C to +150°C Lead Temperature soldering, 10s .................................+300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS VIN = +5V, SHDN = GND MAX1719 , SHDN = IN MAX1720/MAX1721 , C1 = C2 = 10µF MAX1720 , C1 = C2 = 1µF MAX1719/MAX1721 , circuit of Figure 1, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. PARAMETER Supply Voltage Range Quiescent Supply Current Note 3 Shutdown Supply Current Oscillator Frequency Voltage Conversion Efficiency Output Resistance Note 1 OUT to GND Shutdown Resistance SHDN/ SHDN Input Logic High SHDN/ SHDN Input Logic Low SHDN/ SHDN Bias Current Wake-Up Time from Shutdown CONDITIONS MAX1720 TA = +25°C TA = 0°C to + 85°C MAX1719/MAX1721 TA = +25°C TA = 0°C to + 85°C ICC TA = +25°C MAX1720 MAX1719/MAX1721 ISHDN SHDN = IN MAX1719 , TA = +25°C SHDN = GND MAX1720/MAX1721 TA = +85°C fOSC TA = +25°C MAX1720 MAX1719/MAX1721 IOUT = 0, TA = +25°C RO, SHDN IOUT = 10mA TA = +25°C TA = 0°C to +85°C SHDN = IN MAX1719 , SHDN = GND MAX1720/MAX1721 , OUT is internally forced to GND in shutdown +2.5V VIN +5.5V VIN MIN VIN +2.5V +2.5V VIN +5.5V VIN MIN VIN +2.5V IIL, IIH SHDN/ SHDN = GND TA = +25°C or VIN TA = +85°C

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MAX1719/MAX1720/MAX1721

SOT23, Switched-Capacitor Voltage Inverters with Shutdown

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 logiccontrolled 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 VIN , refer to the MAX868. The MAX860/MAX861 and MAX868 are available in space-saving µMAX packages.

Local Negative Supply from a Positive Supply

Small LCD Panels

GaAs PA Bias Supply

Handy-Terminals, PDAs

Battery-Operated Equipment

Typical Operating Circuit
1nA Logic-Controlled Shutdown 6-Pin SOT23 Package 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

PART

MAX1719EUT MAX1720EUT MAX1721EUT

TEMP RANGE
-40°C to +85°C -40°C to +85°C -40°C to +85°C

PINPACKAGE
6 SOT23-6 SOT23-6 SOT23-6

SOT TOP MARK

AACA AABS AABT

Pin Configuration
1µF

INPUT 1.5V to 5.5V

C1+ IN

C1OUT

MAX1721

SHDN

NEGATIVE OUTPUT -1
• VIN 25mA
1µF

TOP VIEW

OUT 1
6 C1+

IN 2 C1- 3

MAX1719 MAX1720 MAX1721
5 SHDN 4 GND

ARE FOR MAX1719

SOT23-6

Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at

MAX1719/MAX1720/MAX1721

SOT23, Switched-Capacitor Voltage Inverters with Shutdown

ABSOLUTE MAXIMUM RATINGS

IN to GND to +6V

OUT to GND to +0.3V C1+, SHDN, SHDN to GND .........................-0.3V to VIN + 0.3V C1- to - 0.3V to +0.3V OUT Output

OUT Short Circuit to

Continuous Power Dissipation TA = +70°C 6-Pin SOT23 derate 8.7mW/°C above +70°C .................696mW

Operating Temperature Range ...........................-40°C to +85°C Junction Temperature Storage Temperature Range .............................-65°C to +150°C Lead Temperature soldering, 10s .................................+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

VIN = +5V, SHDN = GND MAX1719 , SHDN = IN MAX1720/MAX1721 , C1 = C2 = 10µF MAX1720 , C1 = C2 = 1µF MAX1719/MAX1721 , circuit of Figure 1, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.

PARAMETER

Supply Voltage Range

Quiescent Supply Current Note 3 Shutdown Supply Current

Oscillator Frequency Voltage Conversion Efficiency Output Resistance Note 1 OUT to GND Shutdown Resistance SHDN/ SHDN Input Logic High SHDN/ SHDN Input Logic Low SHDN/ SHDN Bias Current Wake-Up Time from Shutdown

CONDITIONS

MAX1720

TA = +25°C

TA = 0°C to + 85°C

MAX1719/MAX1721 TA = +25°C

TA = 0°C to + 85°C

ICC TA = +25°C

MAX1720 MAX1719/MAX1721

ISHDN

SHDN = IN MAX1719 , TA = +25°C SHDN = GND MAX1720/MAX1721 TA = +85°C
fOSC TA = +25°C

MAX1720 MAX1719/MAX1721

IOUT = 0, TA = +25°C

RO, SHDN

IOUT = 10mA

TA = +25°C TA = 0°C to +85°C

SHDN = IN MAX1719 , SHDN = GND

MAX1720/MAX1721 , OUT is internally
forced to GND in shutdown
+2.5V VIN +5.5V VIN MIN VIN +2.5V
+2.5V VIN +5.5V VIN MIN VIN +2.5V

IIL, IIH

SHDN/ SHDN = GND TA = +25°C
or VIN

TA = +85°C

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Datasheet ID: MAX1720EUT 647259