MAX472CPA

3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232 Transceivers Using Four 0.1レF External Capacitors

Features

♦ Complete High-Side Current Sensing

♦ Precision Internal Sense Resistor (MAX471)

♦ 2% Accuracy Over Temperature

♦ Monitors Both Charge and Discharge

♦ 3A Sense Capability with Internal Sense Resistor (MAX471)

♦ Higher Current-Sense Capability with External Sense Resistor (MAX472)

♦ 100µA Max Supply Current

♦ 18µA Max Shutdown Mode

♦ 3V to 36V Supply Operation

♦ 8-Pin DIP/SO Packages

Applications

Portable PCs: Notebooks/Subnotebooks/Palmtops Smart Battery

Packs Cellular Phones Portable Phones Portable

Test/Measurement Systems Battery-Operated Systems Energy Management Systems

ABSOLUTE MAXIMUM RATINGS

Supply Voltage, RS+, RS-, VCC to GND....................-0.3V, +40V

RMS Current, RS+ to RS- (MAX471 only)..........................±3.3A

Peak Current, (RS+ to RS-) ......................................see Figure 5

Differential Input Voltage, RG1 to RG2 (MAX472 only) .....±0.3V

Voltage at Any Pin Except SIGN MAX471 only ...........................................-0.3V to (RS+ - 0.3V)

MAX472 only ..........................................-0.3V to (VCC + 0.3V)

Voltage at SIGN......................................................-0.3V to +40V

Current into SHDN, GND, OUT, RG1, RG2, VCC................±50mA

Current into SIGN.................................................+10mA, -50mA

Continuous Power Dissipation (TA = +70°C)

MAX471 (Note 1): Plastic DIP (derate 17.5mW/°C above +70°C) ..................1.4W

SO (derate 9.9mW/°C above +70°C).............................791mW

MAX472 : Plastic DIP (derate 9.09mW/°C above +70°C) ..............727mW

SO (derate 5.88mW/°C above +70°C)...........................471mW

Operating Temperature Ranges MAX47_C_A........................................................0°C to +70°C MAX47_E_A .....................................................-40°C to +85°C

Junction Temperature Range ............................-60°C to +150°C

Storage Temperature Range .............................-60°C to +160°C

Lead Temperature (soldering, 10sec) .............................+300°C

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