MC33170 Datasheet PDF - ON Semiconductor
Part Number | MC33170 | |
Description | RF Amplifier Companion Chip for Dual-Band Cellular Subscriber Terminal | |
Manufacturers | ON Semiconductor | |
Logo | ||
There is a preview and MC33170 download ( pdf file ) link at the bottom of this page. Total 16 Pages |
Preview 1 page No Preview Available ! 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)
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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
B′G
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
|
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MC33170
Characteristic
Pin # Symbol Min Typ Max Unit
PROTECTION AND STABILIZATION CIRCUIT
(For typical values TA = 25°C, for min/max values TA = –40°C to +85°C, Max TJ = 125°C unless otherwise noted)
Negative bias present
12
–4.2 V
No Negative protection disabled
12 2.5
V
Regulation level
12
–5.4 –5.0 –4.6
V
Sink current
12 5.0 MA
STEERING SWITCHES, SERIES RESISTANCE
(For typical values TA = 25°C, for min/max values TA = –40°C to +85°C, Max TJ = 125°C unless otherwise noted)
GSM–900 @ Id = 1mA, Vbat = 5.5V
3 60 160 W
DCS–1800 @ Id = 1mA, Vbat = 5.5V
Power Amplifier Startup @ Id = 50mA, Vbat = 5.5V
4
5
60 160 W
1.0 2.0 W
Lack of negative circuitry behavior:
The MC33170 hosts a circuitry that prevents the power
modulation startup if the negative bias is not established.
However, to accommodate with PAs that do make use of a
negative bias, it is possible to connect pin 13 to pin 7 and thus
invalidate the protection circuitry. The below sketch details
the available levels to fulfil this function
Vpin 13
OK
2.5V
NOT OK
0V
OK
–4.2V
–5V
MC33170 operating truth table, pin levels:
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁTxEN
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁX
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ0
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ1
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ1
Band Selection
X
X
0
1
Common Enable
0
1
1
1
GSM–900
High–impedance
High–impedance
VLDO–Io.RDS(ON)
High–impedance
DCS–1800
High–impedance
High–impedance
High–impedance
VLDO–Io.RDS(ON)
PA startup
High–impedance
High–impedance
VBAT–Io.RDS(ON)
VBAT–Io.RDS(ON)
Io is the current delivered by the considered pin, RDS(ON) is the switch series resistance as defined in the section Steering
Switches
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for MC33170 electronic component. |
Information | Total 16 Pages | |
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