MAX881R |
RFQ for MAX881R Required Field |
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| Technical/Catalog Information | MAX881REUB |
| Vendor | Maxim Integrated Products |
| Category | Integrated Circuits (ICs) |
| Package / Case | 10-MSOP, Micro10?, 10-uMAX, 10-uSOP |
| Packaging | Tube |
| Type | Inverting |
| Voltage - Input | 2.5 ~ 5.5 V |
| Voltage - Output | -0.5 ~ -4.9 V |
| Number of Outputs | 1 |
| Applications | Charge Pump, Wireless Devices |
| Operating Temperature | -40°C ~ 85°C |
| Lead Free Status | Contains Lead |
| RoHS Status | RoHS Non-Compliant |
| Other Names | MAX881REUB MAX881REUB |
| Product | Manufacturers | Pack | D/C |
| MAX881R | - | SMD | 2000 |
The MAX881R low-noise, inverting power supply is designed for biasing GaAsFET power amplifiers in portable wireless applications. This device is a chargepump inverter followed by a negative linear regulator. The input voltage range is 2.5V to 5.5V. The output is preset at -2.0V or can be set, using two resistors, to any voltage from -0.5V to (-VIN + 0.6V). It can deliver up to 4mA. The internal linear regulator also filters the output to 1mVp-p ripple and noise.
Other features include a power-OK (POK ) output that signals when the negative voltage is within 7.5% of its set point. It protects the GaAsFET by not allowing power to be applied to the GaAsFET's drain until it is properly biased. The signal can be routed either to a microcontroller or directly to a switch at the GaAsFET drain. The MAX881R is available in a space-saving 10-pin MAX package.
Typical Application |
Features |
| ·Cell Phones·PCS Phones·PHS Phones·Wireless Handsets·Wireless Modems·Two-Way Pagers·Mobile Radios·Wireless Computers | ` Small MAX Package` 1mVp-p Output Voltage Ripple and Noise` Power-OK Signal to Control GaAsFET Drain Switch` 0.05A Logic-Controlled Shutdown` 1ms Guaranteed Start-Up` 2.5V to 5.5V Input` -0.5V to (-VIN + 0.6V) Output at up to 4mA` Operates with One 4.7F and Three 0.22F Capacitors (no inductors needed) |
| IN to GND | -3V to +6V |
| SHDN to GND | -3V to +6V |
| POK to GND | -0.3V to +12V |
| C1+ to GND | -0.3V to (VIN + 0.3V) |
| C1-, NEGOUT, OUT, FB to GND | -6V to (VIN + 0.3V) |
| Continuous Power Dissipation (TA = +70) 10-pin MAX (derate 4.1mW/ above +70) |
444mW |
| Operating Temperature Range | -40 to +85 |
| Junction Temperature | +150 |
| Storage Temperature Range | -65 to +165 |
| Lead Temperature (soldering, 10s) | +300 |
Note 1: The output may be shorted to NEGOUT or GND if the package power dissipation is not exceeded. Typical short-circuit current is 35mA.
