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MC33170

RF Amplifier Companion Chip

for Dual-Band Cellular

Subscriber Terminal

The MC33170 is a complete solution for drain modulated

dual鈥揵and GSM 900MHz and DCS鈥?800MHz Power Amplifiers.

Thanks to its internal decoder, the MC33170 drastically simplifies the

interface between the PAs and the baseband logic section, providing

an immediate gain in part count but also in occupied copper area. The

device is also ready for 1V platforms since it accepts logic high control

signals down to 900mV@25擄C.

A priority management system ensures the negative is present

before authorizing the power modulation, giving the necessary

ruggedness to the final design. This function can easily be disabled for

PAs not requiring a negative bias.

The device is able to directly drive an external P or N鈥揷hannel with

the possibility to linearize the overall response via the internal

high鈥損erformance control amplifier and easily implement system

gain.

Finally, an LDO delivers a stable voltage, usable for external biasing

purposes.

http://onsemi.com

14

1

TSSOP鈥?4

DTB SUFFIX

CASE 948G

PIN CONNECTIONS

Band Selection

Tx Enable

GSM-900

1

2

3

14

Common Enable

13 Negative

Regulator

12 Out

11 V

boost

10 INV

9

8

NINV

LDO

DCS-1800 4

PA Start-up

Gnd

V

bat

5

6

7

鈥?/div>

1V platform compatible: ON voltage = 900mV, OFF voltage =

鈥?/div>

300mV max

Priority management system prevents power modulation before

negative bias establishes

High performance 4.5MHz gain鈥揵andwidth product operational

amplifier

Drives N or P鈥揷hannel MOSFET

2.5V low鈥搉oise LDO

Idle mode input for very low power consumption (standby mode)

(Top View)

ORDERING INFORMATION

Device

MC33170DTB

Package

TSSOP鈥?4

Shipping

96 Units / Rail

MC33170DTBR2 TSSOP鈥?4 2500 / Tape & Reel

NINV

9

Shutdown

2.5 V

Low Dropout

2.5 V

V

bat

V

boost

V

bat

(5.5 V Max)

11

7

Shutdown

LDO

Output

Common

Enable

T

X

Enable

Band

Selection

2.5 V

8

+

14

2

1

Open鈥揅ollector BG

Decoder

BD

B鈥睪

3

GSM鈥?00

4

1 mA

Continuous

700 mA

Peak

50 mA

Continuous

Clip

to 鈥? V

13

10

6

12

Out

-

NEGOK?

5

DCS鈥?800

PA Start鈥揢p

Negative INV

Regulator

漏

Semiconductor Components Industries, LLC, 2001

1

May, 2001 鈥?Rev. 1

Publication Order Number:

MC33170/D

型號

版本

描述

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MC33170DTB Datasheet

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