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  ON Semiconductor Electronic Components Datasheet  

MC33170 Datasheet

RF Amplifier Companion Chip for Dual-Band Cellular Subscriber Terminal

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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–band GSM 900MHz and DCS–1800MHz 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°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–channel with
the possibility to linearize the overall response via the internal
high–performance control amplifier and easily implement system
gain.
Finally, an LDO delivers a stable voltage, usable for external biasing
purposes.
1V platform compatible: ON voltage = 900mV, OFF voltage =
300mV max
Priority management system prevents power modulation before
negative bias establishes
High performance 4.5MHz gain–bandwidth product operational
amplifier
Drives N or P–channel MOSFET
2.5V low–noise LDO
Idle mode input for very low power consumption (standby mode)
http://onsemi.com
14
1
TSSOP–14
DTB SUFFIX
CASE 948G
PIN CONNECTIONS
Band Selection 1
Tx Enable 2
GSM-900 3
DCS-1800 4
PA Start-up 5
Gnd 6
Vbat 7
14 Common Enable
13
Negative
Regulator
12 Out
11 Vboost
10 INV
9 NINV
8 LDO
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
MC33170DTB TSSOP–14 96 Units / Rail
MC33170DTBR2 TSSOP–14 2500 / Tape & Reel
LDO
Output 8
Shutdown
2.5 V
2.5 V
Low Dropout
2.5 V
Vbat
NINV Vboost Vbat (5.5 V Max)
9 11
7
Shutdown
Common
Enable 14
TX
Enable
Band
Selection
2
1
Open–Collector BG
Decoder BD
BG
1 mA
Continuous
700 mA
Peak
50 mA
NEGOK?
3 4 Continuous 5
GSM–900 DCS–1800 PA Start–Up
Clip
to –5 V
+
-
13 10
Negative INV
Regulator
6
12
Out
© Semiconductor Components Industries, LLC, 2001
May, 2001 – Rev. 1
1
Publication Order Number:
MC33170/D


  ON Semiconductor Electronic Components Datasheet  

MC33170 Datasheet

RF Amplifier Companion Chip for Dual-Band Cellular Subscriber Terminal

No Preview Available !

MC33170
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPIN DESCRIPTION
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPin No.
Pin Name
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ1 BandSelection
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ2 TxEnable
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ3 GSM–900
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ4 DCS–1800
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ5 PAStart–up
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ6 Gnd
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ7 Vbat
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ8 LDO
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ9 NINV
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ10 INV
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ11 Vboost
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ12 Out
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ13 NegativeReg.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ14 CommonEnable
Function
Selects the transmit band
Starts the power
Biases the 900MHz section
Biases the 1.8GHz section
Enables the PA power section
The IC ground
The IC power supply
Low DropOut regulator
Positive OPAMP input
Negative OPAMP input
Boost voltage from the PA
The OPAMP output
The PA negative clip
Enables the whole IC
Description
A level high on this input selects the DCS chain. A zero selects the GSM
chain.
A level high on this pin enables the DCS/GSM chain and establishes a
low–resistance link between pin 5 and 7
When pin 1 is at zero and pin 2 goes high, the LDO voltage appears on
this pin (pin 14 is high)
When pin 1 is at one and pin 2 goes high, the LDO voltage appears on
this pin (pin 14 is high)
When pin 2 goes high, the battery voltage appears on this pin with a
700mA peak current capability (pin 14 is high)
The IC ground
This pin is wired to the battery terminal. A 100nF decoupling capacitor is
recommended, depending on the supply impedance
This output requires a 100nF decoupling and is able to deliver up to
10mA continuous
The non–inverting OPAMP input
The inverting OPAMP input
This pin connects to a boost voltage delivered by the RF PA. This boost
is necessary when driving an N–channel
The output of the OPAMP/MOSFET driver pin
This pin clips the PA negative bias to —5V and prevents/authorizes the
modulation depending on its typical level :
<5.5V ––– 2.5V> OK
<1.3V ––– –3.5V> NOTOK
<–4.2V ––– –5V> OK
Max. clipping current is 5mA
When high, this pin puts the IC in on–mode
http://onsemi.com
2


Part Number MC33170
Description RF Amplifier Companion Chip for Dual-Band Cellular Subscriber Terminal
Maker ON Semiconductor
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MC33170 Datasheet PDF






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