MAS9142(2000) Просмотр технического описания (PDF) - Micro Analog Systems Oy

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MAS9142
(Rev.:2000)

Power Amplifier Controller (PAC) and 2.8 V, 50 mA LDO Voltage Regulator

Micro Analog Systems Oy 

DA9142.000

26 April, 2000

0$6

This is preliminary information on a

new product under development.

Micro Analog Systems reserves the

right to make any changes without

notice.

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MAS9142 is designed for use in GSM900 and

DCS1800 systems, in particular with Hitachi

PF08103B power amplifier module. Other PA

modules can be used with the MAS9142 with

external compensation elements to maintain the

stability of the PA control loop. The MAS9142

incorporates the power detector biasing

components, RC-filtering for power ramping signal,

operational amplifier with AC feedback and a low

dropout (LDO) voltage regulator with output voltage

2.8 V and maximum load current of 50 mA for

generating supply voltage for VCO/Modulator in the

radio channel of a mobile phone.

)($785(6

$33/,&$7,21

• Two functional blocks: Power Amplifier

Controller and LDO Voltage Regulator

• Low current consumption

• Temperature compensated biasing for external-

detection Schottky diodes

• Both PAC loop and LDO voltage regulator have

temperature-controlled power-down feature

• LDO voltage regulator with short circuit current

protection

• Excellent ripple rejection in regulator

• Dual Band Cellular Phone

• PCMCIA GSM/DCS data communications

127 $9$,/$%/( ,1 7+( 86$ $1' &$1$'$

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