MAX1853EXT

MAX1853EXT Datasheet

MAX1852/MAX1853

Part	Datasheet
MAX1853EXT	MAX1853EXT (pdf)

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MAX1852/MAX1853 SC70 Inverting Charge Pumps with Shutdown The MAX1852/MAX1853 monolithic, CMOS chargepump voltage inverters in the ultra-small SC70 package feature a low output resistance, permitting loads up to 30mA with maximum efficiency. The MAX1852/ MAX1853 are available with operating frequencies of 50kHz and 200kHz, respectively, allowing optimization of supply current or external component size. Small external components and micropower shutdown mode 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. Applications include generating a negative supply from a +5V or +3.3V logic supply to power analog circuitry. Both versions come in a 6-pin SC70 package that is 40% smaller than a SOT23. o 30mA Output Current o Low Output Resistance o 68µA Supply Current MAX1852 o Requires Only Two 0.68µF Capacitors MAX1853 o +2.5V to +5.5V Input Voltage Range o 0.1µA Logic-Controlled Shutdown o Two Switching Frequencies 50kHz MAX1852 200kHz MAX1853 o Slew-Rate Limited to Reduce EMI o Ultra-Small 6-Pin SC70 Package Negative Supply from +5V or +3.3V Logic Supplies Small LCD Panels GaAsFET Bias Supplies Handy-Terminals, PDAs Battery-Operated Equipment PART MAX1852EXT MAX1853EXT Ordering Information TEMP. RANGE -40°C to +85°C -40°C to +85°C PIN PA C K A G E 6 SC70 6 SC70 TOP MARK Typical Operating Circuit 0.68µF INPUT 2.5V TO 5.5V C1+ IN C1OUT MAX1853 SHDN OFF GND NEGATIVE OUTPUT -1 VIN 30mA 0.68µF Pin Configuration TOP VIEW OUT 1 6 C1+ MAX1852 GND 2 MAX1853 5 C1- SHDN 3 SC70-6 Maxim Integrated Products 1 For free samples and the latest literature, visit or phone For small orders, phone MAX1852/MAX1853 SC70 Inverting Charge Pumps with Shutdown ABSOLUTE MAXIMUM RATINGS IN to GND to +6V C1+, SHDN to GND to VIN + 0.3V C1- to - 0.3V to +0.3V OUT to GND to -6V OUT Short-Circuit to GND minute Continuous Power Dissipation TA = +70°C 6-Pin SC70 derate 3.1mW/°C above +70°C .............245mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature Storage Temperature Range .............................-65°C to +150°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 Circuit of Figure 1, capacitors from Table 2, VIN = +5V, SHDN = IN, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. Note 1 PARAMETER CONDITIONS MIN TYP MAX UNITS Supply Voltage Range Quiescent Supply Current Shutdown Supply Current Oscillator Frequency Voltage Conversion Efficiency Output Resistance Note 2 Output Current SHDN Input Logic High SHDN Input Logic Low SHDN Bias Current Wake-Up Time From Shutdown

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MAX1852/MAX1853

SC70 Inverting Charge Pumps with Shutdown

The MAX1852/MAX1853 monolithic, CMOS chargepump voltage inverters in the ultra-small SC70 package feature a low output resistance, permitting loads up to 30mA with maximum efficiency. The MAX1852/ MAX1853 are available with operating frequencies of 50kHz and 200kHz, respectively, allowing optimization of supply current or external component size. Small external components and micropower shutdown mode 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. Applications include generating a negative supply from a +5V or +3.3V logic supply to power analog circuitry. Both versions come in a 6-pin SC70 package that is 40% smaller than a SOT23.
o 30mA Output Current o Low Output Resistance o 68µA Supply Current MAX1852 o Requires Only Two 0.68µF Capacitors MAX1853 o +2.5V to +5.5V Input Voltage Range o 0.1µA Logic-Controlled Shutdown o Two Switching Frequencies
50kHz MAX1852 200kHz MAX1853 o Slew-Rate Limited to Reduce EMI o Ultra-Small 6-Pin SC70 Package

Negative Supply from +5V or +3.3V Logic Supplies Small LCD Panels GaAsFET Bias Supplies Handy-Terminals, PDAs Battery-Operated Equipment

PART

MAX1852EXT MAX1853EXT
Ordering Information

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

PIN PA C K A G E 6 SC70
6 SC70

TOP MARK

Typical Operating Circuit
0.68µF

INPUT 2.5V TO 5.5V

C1+ IN

C1OUT

MAX1853

SHDN

OFF GND

NEGATIVE OUTPUT -1 VIN 30mA
0.68µF

Pin Configuration

TOP VIEW

OUT 1
6 C1+

MAX1852 GND 2 MAX1853 5 C1-

SHDN 3

SC70-6

Maxim Integrated Products 1

For free samples and the latest literature, visit or phone For small orders, phone

MAX1852/MAX1853

SC70 Inverting Charge Pumps with Shutdown

ABSOLUTE MAXIMUM RATINGS

IN to GND to +6V C1+, SHDN to GND to VIN + 0.3V C1- to - 0.3V to +0.3V OUT to GND to -6V OUT Short-Circuit to GND minute

Continuous Power Dissipation TA = +70°C 6-Pin SC70 derate 3.1mW/°C above +70°C .............245mW

Operating Temperature Range ...........................-40°C to +85°C Junction Temperature Storage Temperature Range .............................-65°C to +150°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

Circuit of Figure 1, capacitors from Table 2, VIN = +5V, SHDN = IN, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. Note 1

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

Supply Voltage Range

Quiescent Supply Current

Shutdown Supply Current

Oscillator Frequency

Voltage Conversion Efficiency Output Resistance Note 2 Output Current SHDN Input Logic High SHDN Input Logic Low SHDN Bias Current Wake-Up Time From Shutdown

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Datasheet ID: MAX1853EXT 647265