MAX881REUB+ by Analog Devices

Low-Noise Bias Supply in µMAX with Power OK for GaAsFET PA


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 (active-low 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 10-pin µMAX® package.

Where to Buy

Prices starting from US$2.32

Distributor Stock
Logo for RS
RS
from US$2.78
No stock
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Newark Electronics
from US$3.71
519
in stock
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element14
from US$3.50
519
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Farnell
from US$3.26
519
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Analog Devices
from US$3.46
181
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CoreStaff
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62
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Features

Small µMAX Package
1mVP-P Output Voltage Ripple and Noise
Power-OK Signal to Control GaAsFET Drain Switch
0.05µA Logic-Controlled Shutdown
1ms Guaranteed Startup
2.5V to 5.5V Input
-0.5V to (-VIN + 0.6V) Output at up to 4mA
Operates with One 4.7µF and Three 0.22µF Capacitors (no inductors needed)

Specifications

Topology InverterRegulated
VIN (V) (min) 2.5
VIN (V) (max) 5.5
IOUT (A) (typ) 0.01
Unadj. VOUT (V) -2
Adj. VOUT (V) (min) -VIN-0.6
Adj. VOUT (V) (max) -0.5
IQ (mA) (max) 0.95
Switching Frequency (kHz) 100
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/10
BudgetaryPrice (See Notes) 2.14


MAX881REUB+ Semiconductors - ICs by Analog Devices

CHARGE PUMP INVERTING -2V UMAX-10

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Output Type Fixed
Input Voltage Min 2.5V
Input Voltage Max 5.5V
DC / DC Converter IC Case µMAX
No. of Pins 10Pins
Output Current 10mA
Fixed Output Voltage Nom. -2V
Adjustable Output Voltage Min -
Adjustable Output Voltage Max -
Topology Inverting
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)
Output Voltage Nom. -2V

Alternative Descriptions

Charge Pump, Inverting, -2V, Umax-10 | Newark Electronics
CHARGE PUMP, INVERTING, -2V, UMAX-10 | element14
Low-Noise Bias Supply in µMAX | Analog Devices
MAX881REUB | RS

Frequently Asked Questions

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Is the MAX881REUB+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX881REUB+ have stock available?

Authorised distributors including Newark Electronics, element14, Farnell, Analog Devices and CoreStaff have stock available or on a lead time for MAX881REUB+ .

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