TI TPS9104Y

TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
D
D
D
D
D
D
D
D
D
PT PACKAGE
(TOP VIEW)
ON
SPKR_EN
CL
VL
NC
SPKR_IN
SPKR_OUT–
NC
VCC
SPKR_OUT+
VB
CB
D
Complete Power-Supply/Audio System For
Cellular Handsets
Three Low-Dropout Regulators (LDOs) with
100-mV Dropout
Speaker and Ringer Power Amplifiers Drive
32-Ω Dynamic Speakers or Piezo Devices
Low-Noise Microphone Amplifier
Depop Protection For All Amplifiers
Less Than 1 µA Supply Current in
Shutdown, Typical
250-ms Microprocessor Reset Output
10-mA Charge-Pump Driver Configurable
For Inverted or Doubled Output
Separate Enables for LDOs, Amplifiers, and
Charge Pump
1.185-V Reference Capable of Driving 2 mA
48-Pin TQFP Package
48 47 46 45 44 43 42 41 40 39 38 37
GND
VCC
PL
RNGR_OUT+
RNGR_OUT–
RNGR_IN
RNGR_EN
RESET
NC
AREF
VCP
GND_CP
1
36
2
35
3
34
4
33
5
32
6
31
7
30
8
29
9
28
10
27
11
26
12
25
GND
EN_B
PB
OFF
ON
VCC
NC
EN
PA
MIC_EN
EN_A
GND
13 14 15 16 17 18 19 20 21 22 23 24
CP
EN_CP
GND
ON_REM
NC
MIC_OUT
MIC_IN–
NC
MIC_IN+
REF
VA
CA
D
description
NC – No internal connection
The TPS9104 incorporates a complete power
supply and audio power system for a cellular
subscriber terminal that uses battery packs with three or four NiMH/NiCd cells or a single lithium-ion cell. The
device includes three low-dropout linear regulators rated for 3.3 V or 3 V at 100 mA each, a charge-pump driver,
two power amplifiers for a speaker and a ringer, a low-noise microphone amplifier, and logic that includes a
250-ms reset, on/off control, and processor interface. Regulators A and B and the charge-pump driver are
disabled until regulator L (logic regulator) reaches the rated voltage and RESET is logic high. Regulators A and
B, the charge-pump driver, and the amplifiers have separate enables allowing circuitry to be powered up or down
as necessary to conserve battery power.
Each of the amplifiers has a depop circuit to prevent objectionable noise when the IC is powered up or when
the amplifiers are enabled. Both the speaker amplifier and the ringer amplifier are designed to supply
2 V peak-to-peak into 32 Ω or into a 90-nF piezoelectric speaker. The microphone amplifier is a low-noise
high-gain (AV=100) circuit capable of supplying 3 V peak-to-peak into a 10-kΩ load.
The TPS9104 operates over a free-air temperature range of –40°C to 85°C and is supplied in a 48-pin TQFP
package.
AVAILABLE OPTIONS
PACKAGED DEVICE
TA
– 40°C to 85°C
THIN QFP
(PT)
TPS9104IPT
CHIP FORM
(Y)
TPS9104Y
The PT package is available taped and reeled. Add R suffix to the device
type when ordering (e.g. TPS9104IPTR).
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright  1998, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
functional block diagram
VCP
Charge
Pump
Driver
3
VCC
CP
GND_CP
EN_CP
EN
Voltage
Reference
REF
VB
LDO
Regulator
B
UVLO†
and
OTP‡
1Ω
PB
VA
LDO
Regulator
A
1Ω
EN_A
CA
PA
VL
LDO
Regulator
L
EN_B
CB
1Ω
CL
PL
Reset
Generator
RESET
OFF
ON
ON
ON_REM
SPKR_IN
SPKR_OUT+
_
SPKR_OUT–
+
SPKR_EN
GND
AREF
4
RNGR_OUT+
RNGR_OUT–
RNGR_IN
MIC_IN+
+
_
+
_
MIC_IN–
RNGR_EN
MIC_OUT
MIC_EN
† UVLO - Undervoltage lockout
‡ OTP - Overtemperature protection
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TPS9104Y chip information
These chips, when properly assembled, display characteristics similar to the TPS9104. Thermal compression
or ultrasonic bonding may be used on the doped aluminum bonding pads. The chips may be mounted with
conductive epoxy or a gold-silicon preform.
BONDING PAD ASSIGNMENTS
36
35
34
33
32
31
29
28
27
26
25
37
24
38
23
39
22
CHIP THICKNESS: 15 TYPICAL
BONDING PADS: 3.3 × 3.3 MINIMUM
TJ max = 150°C
TOLERANCES ARE ± 10%.
21
40
138
42
19
43
18
ALL DIMENSIONS ARE IN MILS.
16
45
15
46
14
47
13
48
1
2
3
4
5
6
7
8
10
11
12
138
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
Terminal Functions
TERMINAL
NAME
NO.
I/O
DESCRIPTION
GND
1, 15,
25, 36
Ground. GND terminals should be externally connected to ground to ensure proper functionality.
VCC
2, 31,
40
Supply voltage input. VCC terminals are not connected internally and must be externally connected to ensure
proper functionality.
PL
3
I
Program L. PL provides voltage programming input for regulator L.
RNGR_OUT+
4
O
Ringer amplifier noninverting output
RNGR_OUT–
5
O
Ringer amplifier inverting output
RNGR_IN
6
I
Ringer amplifier input
RNGR_EN
7
I
Ringer amplifier enable input; logic low enables the amplifier
RESET
8
O
Microprocessor reset output
NC
9, 17,
20, 30
41, 44
No connection
AREF
10
Analog reference. A 0.1-µF capacitor must be connected from AREF to ground. No other connections are
allowed.
VCP
11
Charge pump driver supply voltage
GND_CP
12
CP
13
O
Charge pump driver output
EN_CP
14
I
Charge pump driver enable input. Logic low on EN_CP turns on the charge pump.
ON_REM
16
I
Remote on; logic high enables the part.
MIC_OUT
18
O
Microphone amplifier output
MIC_IN–
19
I
Microphone amplifier inverting input
MIC_IN+
21
I
Microphone amplifier noninverting input
REF
22
O
1.185-V reference output. Decouple with 0.01-µF to 0.1-µF capacitor to ground.
VA
23
O
Regulator A output voltage
CA
24
EN_A
26
I
Regulator A enable input; logic low turns on the regulator.
MIC_EN
27
I
Microphone amplifier enable input; logic low turns on the microphone amplifier.
PA
28
I
Program A. PA provides programming input for Regulator A.
EN
29
I/O
Enable signal input/output; logic low enables the part.
ON
32
O
On-signal output
OFF
33
I
Off signal
PB
34
I
Program B. PB provides programming input for Regulator B.
EN_B
35
I
Regulator B enable input; logic low turns on the regulator.
CB
37
VB
38
O
Regulator B output voltage
SPKR_OUT+
39
O
Speaker amplifier noninverting output
SPKR_OUT–
42
O
Speaker amplifier inverting output
SPKR_IN
43
I
Speaker amplifier input
VL
45
O
Regulator L output voltage
CL
46
SPKR_EN
47
I
Speaker amplifier enable input; logic low enables the amplifier.
ON
48
I
On signal; logic low enables the part.
4
Charge pump driver ground
Regulator A filter capacitor connection
Regulator B filter capacitor connection
Regulator L filter capacitor connection
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
detailed description
voltage reference
The regulators and reset generator utilize an internal 1.185-V band-gap voltage reference. The reference is also
buffered and brought out on REF for external use; REF can source a maximum of 2 mA. A 0.01-µF to 0.1-µF
capacitor must be connected between REF and ground.
LDO regulators
The TPS 9104 includes three low-dropout regulators, implemented with 1-Ω PMOS series-pass transistors, with
quiescent supply currents of 100 µA. Each of the regulators can supply up to 100 mA of continuous output
current. The 1-Ω PMOS series-pass transistor achieves the dropout voltage of just 100 mV at the maximum
rated output current. Each regulator output voltage can be independently programmed to either 3.3 V or 3 V
using its programming control input PL, PA or PB (Px). A logic low on Px sets the output voltage of the regulator
to 3.3 V; a logic high sets it to 3 V.
Each LDO contains a current limit circuit. When the current demand on the regulator exceeds the current limit,
the output voltage drops in proportion to the excess current. When the excess load current is removed, the
output voltage returns to regulation. Exceeding the current limit on VL can disable the TPS9104. If enough
current demand is placed on VL, the output voltage drops below the reset threshold voltage causing RESET
to go low, effectively unlatching the enable.
VL is intended to be the primary supply voltage for the microprocessor and other system logic functions. VA and
VB can be used to power low-noise analog circuits and/or implement system power management. The enable
terminals EN_A and EN_B are utilized to power down circuitry when it is not required. EN_A and EN_B are
TTL-compatible inputs with 10-µA active current-source pullups. A logic low enables the respective regulator
while a logic high pulls the regulator output voltage to ground and reduces the regulator quiescent current to
leakage levels. Both EN_A and EN_B are not active until RESET is logic high.
Stability of the LDOs is ensured by the addition of compensation terminals CL, CA, and CB, which connect to
the output of the regulator through an internal 1-Ω resistor. This compensation scheme allows for capacitors
with equivalent series resistance (ESR) of up to 15 Ω, eliminating the need for expensive, low-ESR capacitors.
reset generator
RESET is a microprocessor reset signal that goes to logic low at power-up, or whenever VL drops below 2.93 V
(2.6 V for 3-V applications), and remains in that state for 250 ms after VL exceeds the RESET threshold (see
Figure 5). The open-drain output has a 30-µA pullup that eliminates the need for an external pullup resistor and
still allows it to be connected with other open-drain or open-collector signals. RESET is valid for supply voltages
as low as 1.5 V.
ON, OFF, ON, ON_REM and EN functions
The ON input is intended to be the main enable for the TPS9104 and should be connected to ground through
a push-button switch. Once the switch is pressed, internal logic pulls EN low. The EN terminal is designed to
sink 3.2 mA and can be used as a pulldown to enable other functions on the TPS9104 or other system circuitry.
When EN is pulled low, the TPS9104 checks to make sure the supply voltage is above the UVLO threshold
voltage and the die temperature is below 160°C. If both of these conditions are met, the reference circuitry,
regulator L, reset generator, and other support circuitry are enabled. When RESET goes high, the system can
respond with a logic high on OFF, which latches the TPS9104 on, and the ON push button can then be released.
The TPS9104 is disabled in a similar manner. If the ON push button is pressed while the TPS9104 is enabled,
the ON signal responds with a logic high. Once this logic high is detected, the system can respond with a logic
low on OFF, disabling the TPS9104 and reducing supply currents to 1 µA (see Figure 1).
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
The ON_REM signal can be used in the same manner as ON in enabling or disabling the TPS9104. The signal
is provided as a system interface to increase the flexibility of the system. EN can also be used as an input
wired-OR open collector/drain to enable the TPS9104; however, it does not produce a logic signal ON and
therefore cannot be used in the disable sequence described above. It is not recommended that EN be used as
the primary enable signal for the TPS9104.
Enable Sequence
ON
Disable Sequence
ON Must Be Held Low Until
System Responds With A High
Signal At OFF.
ON Is Pressed To Turn Off
The System (Phone).
ON
EN
VL
Once EN Goes Low, The Status Of The
UVLO And The OTP Are Checked.
If The UVLO And OTP Are Valid, VL
And Other Functions Are Enabled.
250 ms
RESET
250 ms After VL Rises Above The Reset
Threshold Voltage, RESET Goes High.
OFF
The System Can Now
Respond With A High Signal
At OFF.
Once OFF And RESET Are High,
The Enable Input Is Latched On.
System Detects The High
Signal At ON And
Responds With a Low
Signal At OFF.
VA
VB
EN_A And EN_B Are both Active And
Low.
Figure 1. Recommended Enable and Disable Sequence
speaker/ringer power amplifiers
The TPS9104 includes two differential-output power amplifiers capable of driving dynamic or piezoelectric
speakers. Both amplifiers have enable inputs to reduce supply current to leakage levels when the amplifiers
are not in use. Depopping circuitry prevents objectionable noise when the enable inputs are cycled on or off.
Each amplifier requires only two gain-setting resistors and a capacitor for dc blocking (see Figure 46).
RNGR_EN and SPKR_EN inputs are disabled when RESET is asserted. Both the SPKR_EN and the
RNGR_EN have internal 10-µA pullups.
microphone amplifier
This is a high-gain amplifier capable of driving a 10-kΩ load at 3 V peak-to-peak output. MIC_EN input is
disabled when RESET is asserted. The microphone amplifier has an enable input that reduces supply current
to leakage levels when disabled. Added depopping circuitry prevents objectionable noise when the enable input
6
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
is cycled on or off. The microphone amplifier needs only two resistors to set the gain, and one capacitor for dc
blocking (see Figure 47). Regulator A is the analog supply for the microphone amplifier, and EN_A must be
asserted for correct operation.
undervoltage lockout
Undervoltage lockout (UVLO) prevents operation of the functions in the TPS9104 until the supply voltage
exceeds the threshold voltage, eliminating abnormal power-up conditions internally and externally, and
providing an orderly turn-on.
overtemperature shutdown
If the die temperature exceeds 160°C, the thermal protection circuit shuts off the TPS9104. When the die
temperature drops below 150°C, the device can be restarted with the ON input.
charge pump driver
An unregulated inverting or doubler charge pump is implemented (see Figure 44) by connecting a network of
two capacitors and two diodes to CP. In the inverting configuration, the charge pump can power an LCD or
provide gate bias for a GaAs power amplifier. A 5-V supply for flash-memory programming or powering the
subscriber identity module (SIM) European applications can be achieved using the doubler configuration and
an external LDO. A logic-low input to the charge-pump enable, EN_CP, turns on the oscillator and driver; a logic
high turns them off. EN_CP input is disabled when RESET is asserted. The EN_CP has a 10-µA internal pullup.
DISSIPATION RATING TABLE 1 – Free-Air Temperature
PACKAGE
TA ≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE TA = 25°C
TA = 70°C
POWER RATING
TA = 85°C
POWER RATING
PT
1350 mW
10.8 mW/°C
864 mW
702 mW
PACKAGE
TC ≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE TC = 25°C
PT
6579 mW
52.6 mW/°C
DISSIPATION RATING TABLE 2 – Case Temperature
POST OFFICE BOX 655303
TC = 70°C
POWER RATING
4212 mW
• DALLAS, TEXAS 75265
TC= 85°C
POWER RATING
3423 mW
7
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
MAXIMUM CONTINUOUS POWER DISSIPATION
vs
CASE TEMPERATURE
PD – Maximum Continuous Power Dissipation – mW
PD – Maximum Continuous Power Dissipation – mW
MAXIMUM CONTINUOUS POWER DISSIPATION
vs
FREE-AIR TEMPERATURE
1400
1200
1000
800
RθJA = 93°C/W
600
400
200
0
25
50
75
100
125
150
7000
6000
5000
4000
RθJC = 19°C/W
3000
2000
1000
0
25
50
75
100
125
150
TA – Case Temperature – °C
TA – Free-Air Temperature – °C
Figure 2
Figure 3
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†‡
Supply voltage range, VCC, VCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 12 V
Input voltage range at OFF, MIC_EN, SPKR_EN, RNGR_EN, SPKR_IN,
RNGR_IN, MIC_IN+, MIC_IN– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 7 V
Input voltage range at PL, PA, PB, EN, EN_A, EN_B,
ON, ON_REM, EN_CP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to VCC
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See dissipation rating table
Peak output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited
Output current range at SPKR_OUT+, SPKR_OUT–,
RNGR_OUT+, RNGR_OUT– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 100 mA to 100 mA
Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See dissipation rating table
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 85°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Lead Temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
‡ All voltages are with respect to GND.
8
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
recommended operating conditions
MIN
NOM
MAX
UNIT
Supply voltage, VCC, VCP
3
10
V
Input voltage, OFF, MIC_EN, SPKR_EN, RNGR_EN
0
5
V
Input voltage at PL, PA, PB, EN, EN_A, EN_B, ON, ON_REM, EN_CP
0
Reference output current
0
VCC
2
mA
0
100
mA
–40
85
°C
Continuous regulator output current
Operating free-air temperature
V
electrical characteristics over recommended operating free-air temperature range,
VCC = VCP = 4 V, Px = 0 V, IO(Vx) = 35 mA, OFF = VL, ON open, ON_REM = 0 V, Cx = 10 µF
(unless otherwise noted)
voltage reference (REF)
PARAMETER
Output voltage
TEST CONDITIONS†
TA = 25°C,
4 V ≤ VCC ≤ 10 V,
IO = 0
0 ≤ IO≤ 2 mA
MIN
TYP
MAX
1.185
1.161
UNIT
V
1.209
V
LDO regulators
PARAMETER
TEST CONDITIONS†
TA = 25°C
0 ≤ IO(Vx) ≤ 100 mA,
Output voltage at VA, VB, VL (Vx)
Dropout voltage
Load regulation
Line regulation
Ripple rejection
Px = VCC,
Px = VCC,
3.2 V ≤ VCC ≤ 10 V
3.5 V ≤ VCC ≤ 10 V
TA = 25°C
0 ≤ IO(Vx) ≤ 100 mA,
MIN
TYP
MAX
UNIT
3.25
3.3
3.35
V
3.4
V
3.05
V
3.10
V
200
mV
3.2
2.95
2.9
IO(Vx) = 100 mA,
VCC = 3.2 V
IO(Vx) = 0 mA to 100 mA
IO(Vx) = 100 mA,
f = 120 Hz
3
100
VCC = 3.5 V to 10 V
Quiescent current (each regulator)
30
mV
10
mV
60
dB
100
µA
charge pump driver
PARAMETER
TEST CONDITIONS
Frequency
Duty cycle
MIN
TYP
MAX
UNIT
50
100
150
kHz
50%
Output resistance
15
30
Ω
† Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effect must be
taken into account separately.
POST OFFICE BOX 655303
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9
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
electrical characteristics over recommended operating free-air temperature range,
VCC = VCP = 4 V, Px = 0 V, IO(Vx) = 35 mA, OFF = VL, ON open, ON_REM = 0 V, Cx = 10 µF
(unless otherwise noted) (continued)
speaker amplifier/ringer amplifier
TEST CONDITIONS†
PARAMETER
Output voltage swing
Single-ended,
Output offset voltage
Av = 1 V/V
VI(PP) = 1 V,
Av = 1 V/V,
Total harmonic distortion (THD)
Gain bandwidth product (GBW)
RL = 32 Ω
TYP
1.6
2
f = 1 kHz,
RL = 32 Ω
Av = 10 V/V
100 Hz ≤ BW ≤ 100 kHz
Input noise
MIN
4
Quiescent current (each amplifier)
MAX
V
15
30
0.5%
1%
mV
20
kHz
200
µVrms
2
Reference voltage,
voltage AREF
UNIT
PL = VCC
1.221
PL = 0 V
1.345
mA
V
microphone amplifier
TEST CONDITIONS†
PARAMETER
Common mode input voltage range
Input bias current
Both inputs = VA/2
Output voltage swing
10 kΩ load,
Output offset voltage
Av = 1 V/V
f = 1 kHz,
AV = 100 V/V,
Output voltage swing = 1 V, VO(PP)
Total harmonic distortion (THD)
Power-supply rejection ratio (PSRR)
Common-mode rejection ratio (CMRR)
Gain bandwidth product (GBW)
Input noise
VA = 3.3 V
MIN
TYP
MAX
1
VA –1
V
–1
1
µA
6
mV
2.7
3
0.5%
Av = 100 V/V
Av = 100 V/V
V
1%
100
dB
80
Av = 100 V/V
100 Hz ≤ BW ≤ 100 kHz
UNIT
dB
4
Quiescent current
kHz
10
µVrms
180
µA
RESET
TEST CONDITIONS†
PARAMETER
Input threshold voltage
VL voltage decreasing
Input threshold voltage
VL voltage decreasing,
Timeout delay at RESET
See Figure 5
Low-level output voltage
High-level output current
IO = 1 mA,
VO = 2.4 V
Low-level output current
VO = 0.4 V
PL = VCC
MIN
TYP
MAX
UNIT
2.871
2.93
2.989
V
2.548
2.6
2.652
125
250
375
VCC = 1.5 V
–40
Hysteresis
V
ms
0.4
V
–20
µA
3.2
mA
40
mV
logic inputs at EN_A, EN_B, SPKR_EN, RNGR_EN, MIC_EN, EN_CP
PARAMETER
TEST CONDITIONS
High-level input voltage
MIN
TYP
MAX
2
Low-level input voltage
UNIT
V
0.8
V
Input current
–20
–10
1
µA
† Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effect must be
taken into account separately.
10
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• DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
electrical characteristics over recommended operating free-air temperature range,
VCC = VCP = 4 V, Px = 0 V, IO(Vx) = 35 mA, OFF = VL, ON open, ON_REM = 0 V, Cx = 10 µF
(unless otherwise noted) (continued)
logic inputs at PL, PA, PB, OFF, ON_REM
PARAMETER
TEST CONDITIONS
High-level input voltage
MIN
TYP
MAX
2
V
Low-level input voltage
Input current
UNIT
–1
0.8
V
1
µA
logic inputs at ON†
PARAMETER
TEST CONDITIONS
High-level input voltage
MIN
TYP
MAX
2
V
Low-level input voltage
Input current
UNIT
–20
0.8
V
1
µA
logic inputs at EN†
PARAMETER
TEST CONDITIONS
High-level input voltage
MIN
TYP
2.4
Sink current
VO = 2.4 V
VO = 0.4 V
OFF = 0
–50
UNIT
V
Low-level input voltage
Source current
MAX
–30
0.8
V
1
µA
3.2
mA
logic outputs at ON
PARAMETER
TEST CONDITIONS
High-level output voltage
1-mA source current
Low-level output voltage
1-mA sink current
MIN
TYP
MAX
2.4
UNIT
V
0.4
V
overtemperature shutdown
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Temperature threshold
160
°C
Temperature hysteresis
10
°C
undervoltage lockout (UVLO)
PARAMETER
Threshold
TEST CONDITIONS
VCC increasing
MIN
TYP
1.80
Hysteresis
MAX
UNIT
2.52
V
50
mV
supply current
PARAMETER
TEST CONDITIONS
Shutdown
OFF = 0 V
Operating
EN_CP = VCP,
RNGR_EN = VL,
SPKR_EN = VL,
MIC_EN = VL
MIN
TYP
MAX
0.5
10
UNIT
µA
0.7
1
mA
† High and low level voltages are dependent on VCC. See graphs.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
11
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TPS9104Y electrical characteristics, TJ = 25°C, VCC = VCP = 4 V, Px = 0 V, IO(Vx) = 35 mA,
OFF = VL, ON open, ON_REM = 0 V, Cx = 10 µF (unless otherwise noted)
voltage reference (REF)
TEST CONDITIONS†
PARAMETER
Output voltage
MIN
IO = 0
TYP
MAX
1.185
UNIT
V
LDO Regulators
TEST CONDITIONS†
PARAMETER
Output voltage at VA, VB, VL (Vx)
Dropout voltage
Load regulation
Line regulation
Ripple rejection
Px = VCC
IO(Vx) = 100 mA,
MIN
TYP
MAX
2.95
3
3.05
VCC = 3.2 V
IO(Vx) = 0 mA to 100 mA
IO(Vx) = 100 mA,
VCC = 3.5 V to 10 V
f = 120 Hz
Quiescent current (each regulator)
UNIT
V
100
mV
30
mV
10
mV
60
dB
100
µA
charge pump driver
PARAMETER
TEST CONDITIONS
MIN
TYP
Frequency
100
Duty cycle
50%
Output resistance
MAX
UNIT
kHz
Ω
15
speaker amplifier/ringer amplifier
TEST CONDITIONS†
PARAMETER
Output voltage swing
Single-ended,
Output offset voltage
Av = 1 V/V
VI(PP) = 1 V,
Av = 1 V/V,
Total harmonic distortion (THD)
Gain bandwidth product (GBW)
Input noise
MIN
RL = 32 Ω
f = 1 kHz,
RL = 32 Ω
MAX
UNIT
2
V
15
mV
0.5%
Av = 10 V/V
100 Hz ≤ BW ≤ 100 kHz
Quiescent current (each amplifier)
Reference AREF
Reference,
TYP
20
kHz
200
µVrms
2
PL = VCC
1.221
PL = 0 V
1.345
mA
V
microphone amplifier
TEST CONDITIONS†
PARAMETER
Common mode input range
MIN
TYP
1
Output voltage swing
10 kΩ load,
Output offset voltage
Av = 1 V/V
VA = 3.3 V
2.7
MAX
UNIT
VA –1
V
3
V
6
mV
RESET
TEST CONDITIONS†
PARAMETER
Threshold voltage
VL voltage decreasing
Threshold voltage
VL voltage decreasing,
Delay
See Figure 5
MIN
TYP
2.93
PL = VCC
MAX
UNIT
V
2.6
V
250
ms
Hysteresis
40
mV
† Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effect must be
taken into account separately.
12
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
PARAMETER MEASUREMENT INFORMATION
VCC
40
22
REF
0.1 µF
2
31
11
13
Voltage
Reference
Charge Pump
Driver
12
38
REF
37
Regulator
B
+
14
34
23
35
24
Regulator
A
26
VL
ON
8
33
48
ON_REM
32
16
43
VL
10 µF
+
3
Reset
Generator
29
28
+
45
46
Regulator
L
EN
10 µF
_
42
+
39
10
10 µF
RESET
OFF
ON
LOAD
47
0.1 µF
4
+
_
6
LOAD
5
7
21
VI(test)
0.1 µF
+
_
19
18
LOAD
27
36
1
25
15
Figure 4. Test Circuit
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
13
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
PARAMETER MEASUREMENT INFORMATION
VL
VIT+
t
RESET
RESET
Timeout Delay
t
5
4
VCC = 4 V
Px = 0 V
TA = 25°C
IO = 0 mA
Cx = 10 µF
3
Enable
2
1
0
4
3
2
VO
1
0
0
4
8
12
16
VO – Output Voltage – V
Enable Input Voltage – V
Figure 5. RESET Timing Diagram
20
t – Time – ms
Figure 6. LDO Regulator Output Voltage Rise Time and Fall Time
14
POST OFFICE BOX 655303
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
125
VCC = 4 V
Px = 0 V
TA = 25°C
Cx = 10 µF
100
75
50
25
0
3.5
3.4
3.3
3.2
3.1
0
0.5
1
1.5
VO – Output Voltage – V
I O – LDO Regulator
Output Current – mA
PARAMETER MEASUREMENT INFORMATION
2
t – Time – ms
4.4
4.2
4
3.8
3.6
3.4
3.3
Px = 0 V
TA = 25°C
IO = 10 mA
Cx = 10 µF
0
0.3
0.8
0.5
3.2
VO – Output Voltage – V
VCC – Supply Voltage – V
Figure 7. LDO Regulator Load Transient, 1 mA to 100 mA Pulsed Load
3.1
1
t – Time – ms
Figure 8. LDO Regulator Line Transient
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15
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
VI – Input Voltage, MIC_EN – V
PARAMETER MEASUREMENT INFORMATION
5
VCC = 4 V
TA = 25°C
Px = 0 V
4
3
ÁÁ
ÁÁ
1
3.5
3
2.5
2
1.5
1
0.5
0
10
20
30
t – Time – µs
40
50
VO – Output Voltage, MIC_OUT – V
2
ÁÁ
5
VCC = 4 V
TA = 25°C
Px = 0 V
4
3
2
1
0
2.5
2
1.5
1
0.5
0
10
20
30
t – Time – µs
40
50
Figure 10. Speaker Enable Output Response
16
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
VO – Output Voltage, SPKR_OUT+ – V
VI – Input Voltage, SPKR_EN – V
Figure 9. Microphone Enable Output Response
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
5
VCC = 4 V
TA = 25°C
Px = 0 V
4
3
2
1
0
ÁÁ
3
2.5
2
1.5
1
0.5
0
10
40
20
30
t – Time – µs
50
VO – Output Voltage, RNGR_OUT+ – V
VI – Input Voltage, RNGR_EN – V
PARAMETER MEASUREMENT INFORMATION
Figure 11. Ringer Enable Output Response
4
VCC = 4 V
TA = 25°C
Px = 0 V
VO – Output Voltage, MIC_OUT – V
VO – Output Voltage, MIC_OUT – V
4
3
2
1
VCC = 4 V
TA = 25°C
Px = 0 V
3
2
1
0
0
0
10
20
30
t – Time – µs
40
50
0
10
20
30
40
50
t – Time – µs
Figure 12. Microphone Slew Rate, Rising
POST OFFICE BOX 655303
Figure 13. Microphone Slew Rate, Falling
• DALLAS, TEXAS 75265
17
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
Table of Graphs
FIGURE
ICC
Quiescent current
Dropout voltage
14
vs Output current
15
vs Junction temperature
16
∆VO
VO
Change in output voltage
vs Junction temperature
17
Output voltage, VL
vs Supply voltage
18
∆VO
∆VO
Change in output voltage
vs Supply voltage
19
Change in output voltage
vs Output current
20
ICC
Shutdown current
vs Supply voltage
21
Threshold, ON
vs Supply voltage
22
Threshold, EN
vs Supply voltage
23
Threshold, ON_REM
vs Supply voltage
24
Ripple rejection
vs Frequency
25
Output spectral noise density
vs Frequency
26
Change in frequency, CP
vs Junction temperature
27
rO
Output resistance into CP
vs Supply voltage
28
rO
Output resistance out of CP
vs Supply voltage
29
VOM
Maximum peak output voltage
vs Load resistance
30
vs Frequency
31
vs Load resistance
32
THD
Total harmonic distortion
kSVR
Power supply rejection ratio
vs Frequency
33
Vn
VO
Output noise voltage
vs Frequency
34
Output voltage
vs Junction temperature
35
VOM
Maximum peak output voltage
vs Load
36
vs Frequency
37
THD
Total harmonic distortion
vs Load resistance
38
kSVR
Power supply rejection ratio
vs Frequency
39
Closed-loop gain and phase shift
vs Frequency
40
Output noise voltage
vs Frequency
41
Phase margin
vs Load capacitance
42
Vn
Φm
18
vs Supply voltage
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
LDO REGULATORS
QUIESENT CURRENT
vs
SUPPLY VOLTAGE
DROPOUT VOLTAGE
vs
OUTPUT CURRENT
160
1
Px = 0
IO = 0
TA = 25°C
140
120
Dropout Voltage – mV
I CC – Quiesent Current – mA
0.9
0.8
85°C
0.7
25°C
–40°C
100
Px = VCC
80
60
Px = 0
40
0.6
20
0.5
3
4
7
8
5
6
VCC – Supply Voltage – V
9
0
10
0
10
20
30 40 50 60 70 80
IO – Output Current – mA
Figure 14
LDO REGULATORS
LDO REGULATORS
DROPOUT VOLTAGE
vs
JUNCTION TEMPERATURE
CHANGE IN OUTPUT VOLTAGE
vs
JUNCTION TEMPERATURE
10
IO = 100 mA
Px = 0
∆VO – Change in Output Voltage – mV
Dropout Voltage – mV
110
100
90
80
70
–25
0
VCC = 4 V
Px = 0
8
120
60
–50
100
Figure 15
140
130
90
25
50
75
100
125
6
IO = 0 mA
4
2
0
–2
–4
IO = 100 mA
–6
–8
–10
–50
–25
0
25
50
75
100
125
TJ – Temperature – °C
TJ – Temperature – °C
Figure 17
Figure 16
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19
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
REGULATOR L
LDO REGULATORS
OUTPUT VOLTAGE
vs
SUPPLY VOLTAGE
CHANGE IN OUTPUT VOLTAGE
vs
SUPPLY VOLTAGE
4
3.5
VO – Output Voltage, VL – V
3
∆VO – Change in Output Voltage – mV
Px = 0
TA = 25°C
EN = 0
2.5
2
1.5
1
0.5
Px = 0 or
Px = VCC
TA = 25°C
IO = 35 mA
3
2
1
0
–1
–2
–3
–4
0
2
2.2
2.4 2.6 2.8
3
3.2 3.4 3.6
3.8
3
4
4
5
6
7
8
VCC – Supply Voltage – V
VCC – Supply Voltage – V
9
10
Figure 19
Figure 18
LDO REGULATORS
SHUTDOWN CURRENT
vs
SUPPLY VOLTAGE
CHANGE IN OUTPUT VOLTAGE
vs
OUTPUT CURRENT
4
VCC = 4 V
Px = 0 or Px = VCC
TA = 25°C
15
OFF = 0
3.5
I CC – Shutdown Current – µ A
∆VO – Change in Output Voltage – mV
20
10
5
0
–5
–10
3
2.5
2
1.5
1
–15
0.5
–20
0
0
10
20
30
40
50
60
70
80
90 100
TA = 40°C
2
3
4
5
6
Figure 21
Figure 20
POST OFFICE BOX 655303
7
8
VCC – Supply Voltage – V
IO – Output Current – mA
20
TA = 25°C
TA = 85°C
• DALLAS, TEXAS 75265
9
10
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
INPUT THRESHOLD VOLTAGE, EN
vs
SUPPLY VOLTAGE
INPUT THRESHOLD VOLTAGE, ON
vs
SUPPLY VOLTAGE
4.9
OFF = 0 V
EN = Open
ON_REM = 0 V
–40°C
V IT – Input Threshold Voltage, EN – V
V IT – Input Threshold Voltage, ON – V
1.8
1.6
25°C
1.4
85°C
1.2
1
OFF = 0 V
ON = Open
ON_REM = 0 V
4.4
3.9
3.4
2.9
2.4
1.9
1.4
0.8
8
4
6
VCC – Supply Voltage – V
2
2
10
3
4
5
6
7
8
9
10
VCC – Supply Voltage – V
Figure 23
Figure 22
LDO REGULATORS
INPUT THRESHOLD VOLTAGE, ON_REM
vs
SUPPLY VOLTAGE
RIPPLE REJECTION
vs
FREQUENCY
80
EN = Open
ON = Open
OFF = 0 V
3.5
Ripple Rejection – dB
V IT – Input Threshold Voltage, ON_REM – V
4
3
2.5
2
60
40
VCC = 4 V
TA = 25°C
Cx = 10 µF
IO = 35 mA
1.5
1
2
3
4
5
6
7
8
9
10
20
0.01
VCC – Supply Voltage – V
0.1
1
10
100
1000
f – Frequency – kHz
Figure 25
Figure 24
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21
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
REGULATOR L
CHANGE IN FREQUENCY, CP
vs
JUNCTION TEMPERATURE
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
4
100
∆f – Change in Frequency, CP – kHz
Hz
Output Spectral Noise Density – µV /
VCP = 4 V
VCC = 4 V
Px = 0 V
TA = 25°C
IO = 35 mA
10
1
1
10
100
1000
3
2
1
0
–1
–2
–3
–50
10000
–25
0
25
75
100
125
Figure 27
Figure 26
OUTPUT RESISTANCE, CP
vs
SUPPLY VOLTAGE
OUTPUT RESISTANCE, CP
vs
SUPPLY VOLTAGE
30
30
Current Into CP
Current Out of CP
25
ro – Output Resistance, CP – Ω
25
ro – Output Resistance, CP – Ω
50
TJ – Temperature – °C
f – Frequency – Hz
20
85°C
15
25°C
10
–40°C
5
20
15
85°C
10
25°C
5
–40°C
0
0
3
4
5
6
7
8
9
VCC(VCP) – Supply Voltage – V
10
3
4
Figure 29
Figure 28
22
8
9
5
6
7
VCC(VCP) – Supply Voltage – V
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
SPEAKER AND RINGER AMPLIFIERS
SPEAKER AND RINGER AMPLIFIERS
MAXIMUM PEAK OUTPUT VOLTAGE
vs
LOAD RESISTANCE
TOTAL HARMONIC DISTORTION
vs
FREQUENCY
3
ÁÁ
ÁÁ
Px = 0 V
VCC = 4 V
TA = 25°C
f = 1 kHz
Av = 1 V/V
2.8
2.6
2.4
THD – Total Harmonic Distortion – %
VOM – Maximum Peak Output Voltage – V
3
2.2
2
1.8
1.6
1.4
2
Px = 0 V
VCC = 4 V
TA = 25°C
VO(PP) = 1 V
RL = 32 Ω
Av = 1 V/V
1
1.2
0
0.1
1
10
100
RL – Load Resistance – Ω
1000
1
Figure 31
Figure 30
SPEAKER AND RINGER AMPLIFIERS
SPEAKER AND RINGER AMPLIFIERS
TOTAL HARMONIC DISTORTION
vs
LOAD RESISTANCE
POWER SUPPLY REJECTION RATIO
vs
FREQUENCY
0.6
100
Px = 0 V
VCC = 4 V
TA = 25°C
f = 1 kHz
VO(PP) = 1 V
Av = 1 V/V
0.5
0.4
k SVR – Power Supply Rejection Ratio – dB
THD – Total Harmonic Distortion – %
10
f – Frequency – kHz
0.3
0.2
ÁÁ
ÁÁ
0.1
0
0
500
1000
1500
2000
2500
RL – Load Resistance – Ω
3000
Px = 0 V
VCC = 4 V
TA = 25°C
80
60
40
20
0
0.01
0.1
1
10
100
1000
f – Frequency – kHz
Figure 33
Figure 32
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• DALLAS, TEXAS 75265
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
SPEAKER AND RINGER AMPLIFIERS
SPEAKER AND RINGER AMPLIFIERS
OUTPUT NOISE VOLTAGE
vs
FREQUENCY
OUTPUT VOLTAGE
vs
JUNCTION TEMPERATURE
2.2
200
Px = 0 V
VCC = 4 V
2.1
150
VO– Output Voltage – V
V n – Output Noise Voltage – nV
Px = 0 V
VCC = 4 V
TA = 25°C
100
2
1.9
1.8
50
1.7
0
0.1
1.6
–55
10
1
–25
0
25
50
75
TJ – Temperature – °C
f – Frequency – kHz
MICROPHONE AMPLIFIER
MICROPHONE AMPLIFIER
TOTAL HARMONIC DISTORTION
vs
FREQUENCY
MAXIMUM PEAK OUTPUT VOLTAGE
vs
LOAD RESISTANCE
0.24
VCC = 4 V
Px = 0 V
TA = 25°C
f = 1 kHz
Av = 100 V/V
THD – Total Harmonic Distortion – %
VOM – Maximum Peak Output Voltage – V
3.5
2.5
2
1.5
1
100
1k
10 k
RL – Load Resistance – Ω
100 k
0.22
VCC = 4 V
Px = 0 V
TA = 25°C
0.2
0.18
0.16
0.14
0.12
0.1
1
f – Frequency – kHz
Figure 37
Figure 36
24
125
Figure 35
Figure 34
3
100
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
MICROPHONE AMPLIFIER
POWER SUPPLY REJECTION RATIO
vs
FREQUENCY
100
0.35
VCC = 4 V
Px = 0 V
TA = 25°C
k SVR– Power Supply Rejection Ratio – dB
THD – Total Harmonic Distortion – %
MICROPHONE AMPLIFIER
TOTAL HARMONIC DISTORTION
vs
LOAD RESISTANCE
0.3
0.25
0.2
0.15
80
60
40
20
0.01
0.1
0
10
40
20
30
RL – Load Resistance – kΩ
50
VCC = 4 V
Px = 0 V
TA = 25°C
60
0.1
1
MICROPHONE AMPLIFIER
MICROPHONE AMPLIFIER
OUTPUT NOISE VOLTAGE
vs
FREQUENCY
225°
20
180°
135°
Phase
10
90°
0
45°
–10
100
100
0°
1000
Vn – Output Noise Voltage – nV
Gain
VCC = 4 V
Px = 0 V
Av = 100
RL = 10 kΩ
TA = 25°C
Phase Shift
30
10
1000
f– Frequency – kHz
CLOSED-LOOP GAIN AND PHASE SHIFT
vs
FREQUENCY
40
Closed-Loop Gain – dB
100
Figure 39
Figure 38
1
10
VCC = 4 V
Px = 0 V
TA = 25°C
80
60
40
20
0
1
10
100
1000
10000
f – Frequency – Hz
f – Frequency – kHz
Figure 41
Figure 40
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25
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
MICROPHONE AMPLIFIER
PHASE MARGIN
vs
LOAD CAPACITANCE
80°
VCC = 4 V
Px = 0 V
TA = 25°C
φ m – Phase Margin
60°
40°
20°
0°
0
0.2
0.4
0.6
0.8
CL – Load Capacitance – µF
Figure 42
26
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1
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
THERMAL INFORMATION
Using thermal resistance, junction-to-ambient (RθJA), maximum power dissipation can be calculated with the
equation:
P
+
D(max)
T
* TA
J(max)
R
qJA
Where TJ(max) is the maximum allowable junction temperature or 125°C.
This limit should then be applied to the internal power dissipation of the TPS9104. The equation for calculating
total internal power dissipation of the TPS9104 is:
P
D(max)
+
ȍǒ
V
x
I
Ǔ
* VX
I
X
) VI
I
Q
Many system-dependent issues such as thermal coupling, airflow, added heat sinks and convection surfaces,
and the presence of other heat-generating components affect the power dissipation limits of a given component.
Three basic approaches for enhancing thermal performance are:
•
•
•
Improving the power dissipation capability of the PWB design
Improving the thermal coupling of the component to the PWB
Introducing airflow in the system
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27
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
APPLICATION INFORMATION
BATTERY
1 µF
Voltage
Reference
REF
0.1 µF
Charge Pump
4.7 µF
RF
Section
REF
Regulator
B
3.3 V
Regulator
A
3.3 V
Regulator
L
3.3 V
7–13 µF
Analog
Section
7–13 µF
7–13 µF
Reset
Generator
RESET
OFF
EN
ON
ON
ON_REM
SPKR_IN
Audio
Speaker
_
VL
+
SPKR_EN
0.1 µF
+
_
RNGR_IN
Ringer
Speaker
REF
0.1 µF
RNGR_EN
+
_
MIC
MIC_EN
GND
Figure 43. Typical Application
28
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Processor
and
Logic
Section
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
APPLICATION INFORMATION
LDOs (VL, VA, VB) output capacitors
A 10-µF capacitor must be tied to Cx (CL, CA, or CB). The Cx terminal is connected internally to the output of
the LDO through a 1-Ω resistor. The stability of LDOs is dependent on the ESR of the output filter capacitor. Most
LDOs are designed to be stable over a narrow range of ESR with lower limits and upper limits, thus limiting the
type of capacitor that can be used. With the use of the internal 1-Ω resistor, the lower ESR limit of the capacitor
is eliminated, permitting the upper limit to be raised. Therefore, almost any tantalum or ceramic capacitor can
be used, provided the ESR does not exceed 15 Ω over temperature.
charge pump design
VCC
VCC
VCP
VCP
C1
C1
VO
CP
VO
CP
+
C2
C2
+
GND_CP
GND_CP
a. Voltage Inverter
b. Voltage Doubler
Figure 44. Charge Pump Configurations
The charge-pump terminal can drive either a voltage inverter or a voltage doubler. In either case only two
capacitors and two signal diodes are needed. The output voltage is unregulated and a regulator may be added
if needed.
The charge transfer of C1 is:
Dq + C1
(VCC
* VO)
This occurs f times a second and the charge transfer per unit time (current) is:
I
+f
C1
(VCC
* VO)
Rewriting this equation in the form of I = V/R
I
where
+
1
f
C1
V
CC
* VO
1
f C1
is an equivalent resistor.
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TPS9104
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POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
APPLICATION INFORMATION
charge pump design (continued)
An equivalent circuit can now be drawn taking the diodes into account.
Rinternal
Requiv
Rinternal
–(VCC –Vdiode)
Requiv
2VCC –Vdiode
+
C2
C2
+
a. Voltage Inverter
b. Voltage Doubler
Figure 45. Equivalent Circuit
The output voltage for the doubler is then:
VO
+2
VCC
*2
Vdiode
* IO
Rtotal
and the output voltage for the inverter is:
VO
+ * (VCC * 2
Vdiode)
) IO
Rtotal
To determine the size of C1 use
C
+f
I
DV
where f = 100,000 and ∆V = ripple voltage.
For an output current of 10 mA calculate
C1
+ 100 kHz0.010.1A Vripple + 1 mF
Because of losses caused by diode switching and ESR, the calculated capacitance should be multiplied by 1.5
to 2. A 2-µF capacitance should drive a 10-mA voltage doubler or inverter.
amplifier design
TPS9104
AREF
SPKR_OUT+
or RNGR_OUT+
+
_
C2
0.1 µF
–1
Speaker
SPKR_IN
or RNGR_IN
SPKR_OUT–
or RNGR_OUT–
Audio In
C1
R1
R2
Figure 46. Speaker and Ringer Amplifiers
30
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
APPLICATION INFORMATION
amplifier design (continued)
The speaker and ringer amplifiers are capable of driving either dynamic or piezoelectric speakers. The gain is
set with two external resistors connected as shown. There is an inverting stage and a noninverting stage, both
of which can drive a speaker differentially. When the speaker is connected in the differential mode, the gain is
doubled. The gain equation is
G
+ R2
R1
2
Typically R2 is in the range of 10 kΩ to 100 kΩ and the gain can be as high as 10. The noninverting amplifier
input is connected to the internal reference and should be bypassed with a 0.1-µF capacitor. The audio input
signal must be capacitor-coupled (refer to C1 in Figure 47). R1 and C1 determine the low-frequency pole (fp)
location. The frequency response of the input RC is:
fp
+2
p
1
R1
C1
For a 0.22-µF capacitor and a 1-kΩ resistor, the 3-dB point is
fp
+2
p
1
1K
0.22 mF
+ 750 Hz
Both VCC and VL supply power to the speaker and ringer amplifiers. The output of VL is used to power the
high-gain input stage, and VCC is used to power the low-gain high-current output stage. When driving a highly
capacitive load, series resistance should be added to minimize signal distortion.
TPS9104
+
_
MIC_IN+
MIC_OUT
MIC_IN–
Microphone
C1
R1
R2
Figure 47. Microphone Amplifier
This is a high-gain amplifier capable of driving a 10 kΩ load at 3 V. The gain is set using two external resistors,
R2 . Typically
R1 and R2. A low noise reference must be connected to MIC_IN+. The gain equation is: G
R1
R2 can be in the range of 10 kΩ to 100 kΩ and the gain can be up to 100. The microphone must be either
capacitor-coupled (C1) or tied to the reference. The closed-loop –3 dB point for this amplifier is a minimum of
4 kHz. The location of the low-frequency pole can be calculated using
+
fp
+2
p
1
R1
.
C1
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
MECHANICAL DATA
PT (S-PQFP-G48)
PLASTIC QUAD FLATPACK
0,27
0,17
0,50
36
0,08 M
25
37
24
48
13
0,13 NOM
1
12
5,50 TYP
7,20
SQ
6,80
9,20
SQ
8,80
Gage Plane
0,25
0,05 MIN
1,45
1,35
Seating Plane
1,60 MAX
0°– 7°
0,75
0,45
0,10
4040052 / C 11/96
NOTES: A.
B.
C.
D.
32
All linear dimensions are in millimeters.
This drawing is subject to change without notice.
Falls within JEDEC MS-026
This may also be a thermally enhanced plastic package with leads conected to the die pads.
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