MAX840, MAX843, MAX844 Low-Noise, Regulated, -2V GaAsFET Bias

The MAX840 MAX843 MAX844 low-noise, inverting charge-pump power supplies are ideal for biasing GaAsFETs in cellular telephone transmitter Amplifiers They operate with inputs down to 2.5V.
The MAX840 offers both a -2V preset output and a -0.5V to -9.4V adjustable output. The MAX843 MAX844 use an external positive control voltage to set the negative output voltage. Input voltage range for all the devices is 2.5V to 10V, and output current is 4mA with VIN > 2.7V. These circuits CAN operate with small capacitors, as low as 0.22F.
An internal linear Regulator reduces the MAX840 's output voltage ripple to 1mVp-p. With a well-filtered control voltage (VCTRL), the MAX843 MAX844 also achieve less than 1mVp-p typical output ripple. Supply current is 750A, and reduces to less than 1A in shutdown MAX840 MAX843 . The MAX844 's unregulated output is active in shutdown, with the Charge Pump switching at 20kHz. It provides a low-power LCD supply.
By Maxim Integrated Products
MAX840 's PackagesMAX840 's pdf datasheet
MAX840ESA SOIC
MAX840ESAT SOIC
MAX840ESA-T SOIC
MAX840ISA-T SOIC
MAX840ISA SOIC
MAX840ISAT SOIC




MAX840 Pinout, Pinouts
MAX840 pinout,Pin out
This is one package pinout of MAX840,If you need more pinouts please download MAX840's pdf datasheet.

MAX840 Application circuits
MAX840 circuits
This is one application circuit of MAX840,If you need more circuits,please download MAX840's pdf datasheet.


Related Electronics Part Number

Related Keywords:

MAX840 Pb-Free MAX840 Cross Reference MAX840 Schematic MAX840 Distributor
MAX840 Application Notes MAX840 RoHS MAX840 Circuits MAX840 footprint