PT5506 [TI]
3-A 5-V/3.3-V Input Adjustable Integrated Switching Regulator; 3 -A 5 -V / 3.3 - V输入可调集成开关稳压器
| 型号： | PT5506 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 3-A 5-V/3.3-V Input Adjustable Integrated Switching Regulator |
| 文件： | 总9页 (文件大小：174K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PT5500 Series
3-A 5-V/3.3-V Input Adjustable
Integrated Switching Regulator
SLTS132A
(Revised 10/5/2001)
Features
• Single-Device: 5V/3.3V Input
• DSP Compatible
• 90% Efficiency
• Small Footprint
• Space-Saving package
• Adjustable Output Voltage
• Output Inhibit Function
• Short Circuit Protection
• Solderable Copper Case
Ordering Information
PT 5501¨ =3.3Volts
PT 5502¨ =2.5Volts
PT 5503¨ =2.0Volts
PT 5504¨ =1.8Volts
PT 5505¨ =1.5Volts
PT 5506¨ =1.2Volts
PT 5507¨ =1.0Volts
Pin-Out Information
Description
Pin Function
The PT5500 Excalibur™ power modules
are a series of high-performance Integrated
Switching Regulators (ISRs). Rated 3A,
these modules operate from input voltages as
low as 3.1V to provide a local step-down
power source. They are an ideal compliment
to the industry’s latest high-performance DSPs
and microprocessors. The series includes
output voltage options as low as 1.0VDC.
The PT5500 series is packaged in a 5-pin
thermally efficient copper case. The case is
solderable, has a small footprint, and can
accommodate both through-hole and surface
mount pin configurations.
1
2
3
4
5
Inhibit *
V
in
GND
Vo
Vo Adjust
* For Inhibit pin:
Open = output enabled
Ground = output disabled
PT Series Suffix
(PT1234x)
Case/Pin
Configuration
O rder
Suffix
Package
Code
Vertical
Horizontal
SMD
N
A
C
(EFK)
(EFL)
(EFM)
(Reference the applicable package code draw-
ing for the dimensions and PC board layout)
The product features external output
voltage adjustment, an inhibit function, and
short circuit protection. A 100µF capacitor
is required for proper operation.
Standard Application
INH
VOADJ
1
5
PT5500
3
+VIN
4
+VO
2
+
C 1
C2
C O M
C O M
C
C
= Optional 1µF ceramic
= Required 100µF (See Notes)
1
2
For technical support and more information, see inside back cover or visit www.ti.com
PT5500 Series
3-A 5-V/3.3-V Input Adjustable
Integrated Switching Regulator
Specifications (Unless otherwise stated, Ta =25°C, Vin =5V,Cout =100µF, and Io =Iomax)
PT5500 SERIES
Typ
Characteristics
Symbols
Conditions
Min
Max
Units
Output Current
InputVoltageRange
Io
Vin
Over Vin range
Over Io range
0.1 (1)
=3.3V4.5
—
—
3.0
5.5
A
V
Vo
Vo≤2.5V3.1
5.5
Set-PointVoltageTolerance
TemperatureVariation
Line Regulation
Load Regulation
TotalOutputVariation
Vo tol
—
—
—
—
—
0.5
—
—
2
—
6
%Vo
%Vo
mV
∆Regtemp
∆Regline
∆Regload
∆Regtot
–40°C <Ta < +85°C
Over Vin range
Over Io range
10
mV
Includes set-point, line, load,
—
—
3
%Vo
–40°C ≤ Ta ≤ +85°C
Efficiency
η
PT5501
PT5502
PT5503
PT5504
PT5505
PT5506
PT5507
—
—
—
—
—
—
—
90
87
85
83
81
79
76
—
—
—
—
—
—
—
%
Vo Ripple (pk-pk)
Vr
20MHz bandwidth
—
25
45
mV
Transient Response
ttr
∆Vtr
1A/µs load step from 50% to 100% Iomax
Vo over/undershoot
—
—
50
50
—
100
µSec
mV
Current Limit
Switching Frequency
Ilim
ƒo
—
—
5
—
—
A
kHz
Over Vin and Io ranges
350 (2)
Inhibit Control (pin1)
InputHighVoltage
InputLowVoltage
Input Low Current
(3)
V IH
V IL
IIL
Cout
T
a
Referenced to GND (pin3)
Pin 1 to GND
Vin –0.5
–0.2
—
Open
0.5
V
—
—
–0.5
—
—
—
mA
µF
°C
(4)
External Capacitance
100
—
Absolute Maximum
Over Vin range
—
Per Mil-STD-883D, Method 2002.3 , 1 msec,
Half Sine, mounted to a fixture
–40 (5)
+85 (6)
Operating Temperature Range
Storage Temperature
Mechanical Shock
T
s
-40
—
—
500
+125
—
°C
G’s
MechanicalVibration
Per Mil-STD-883D, Method 2007.2,
20-2000 Hz, Soldered in a PC board
—
(7)
—
—
15
—
—
G’s
grams
Weight
Flammability
—
—
6.5
Materials meet UL 94V-0
Notes: (1) The ISR will operate down to no load with reduced specifications.
(2) This is a typical value only. The switching frequency will vary with input voltage.
(3) The Inhibit control (pin 1) has an internal pull-up, and if left open-circuit the module will operate when input power is applied. A small low-leakage
(<100nA) MOSFET is recommended to control this input. Ensure an On/Off transition time of ≤10µs. See application notes for more information.
(4) The PT5500 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.
(5) For operation below 0°C, the output capacitor C2 must have stable characteristics. Use either a low ESR tantalum or Oscon® capacitor.
(6) See SOA curves or consult factory for the appropriate derating.
(7) The case pins on the through-hole package types (suffixes N & A) must be soldered. For more information see the applicable package outline drawing.
For technical support and more information, see inside back cover or visit www.ti.com
Typical Characteristics
PT5500 Series
3-A 5-V/3.3-V Input Adjustable
Integrated Switching Regulator
Performance Data; Vin =5.0V (See Note A)
Performance Data; Vin =3.3V (See Note A)
Efficiency vs Output Current
Efficiency vs Output Current
100
100
90
80
70
60
50
90
80
PT5501
PT5502
PT5504
PT5505
PT5502
PT5504
PT5505
70
60
50
40
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
Iout (A)
Iout (A)
Ripple vs Output Current
Ripple vs Output Current
40
30
20
10
0
40
30
20
10
0
PT5505
PT5504
PT5502
PT5501
PT5505
PT5504
PT5502
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
Iout (A)
Iout (A)
Power Dissipation vs Output Current
Power Dissipation vs Output Current
1.25
1
1.25
1
0.75
0.5
0.25
0
0.75
0.5
0.25
0
PT5502
PT5504
PT5505
PT5501
PT5505
PT5504
PT5502
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
Iout (A)
Iout (A)
Safe Operating Area; Vin =5.0V (See Note B)
90.0
Safe Operating Area; Vin =3.3V (See Note B)
90.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
80.0
70.0
60.0
50.0
40.0
30.0
Airflow
Airflow
200LFM
120LFM
60LFM
200LFM
120LFM
60LFM
Nat conv
Nat conv
0.0
0.5
1.0
1.5
2.0
2.5
3.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Iout (A)
Iout (A)
Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the ISR.
Note B: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures.
For technical support and more information, see inside back cover or visit www.ti.com
Application Notes
PT5500/5520 Series
Adjusting the Output Voltage of the PT5500/20
Series of Excalibur Step-Down ISRs
Notes:
The output voltage of both the PT5500 and PT5520
series ISRs may be adjusted higher or lower than the
factory trimmed pre-set voltage with the addition of a
single external resistor. Table 1 accordingly gives the
allowable adjustment range for each model for either
series as Va (min) and Va (max).
1. Use only a single 1% resistor in either the (R1) or R2
location. Place the resistor as close to the ISR as possible.
2. Never connect capacitors from Vo adj to either GND or
Vout. Any capacitance added to the Vo adjust pin will
affect the stability of the ISR.
3. For each model, adjustments to the output voltage may
place additional limits on the minimum input voltage.
The revised minimum input voltage must comply with the
following requirement.
Adjust Up:
An increase in the output voltage is obtained by
adding a resistor R2, between pin 5 (Vo adj) and pin 3 (GND).
Vin(min) = (Va + 0.5)V or as specified in the data sheet,
whichever is greater.
Adjust Down: Add a resistor (R1), between pin 5 (Vo adj) and
pin 4 (Vout).
Figure 1
2
4
V in
V o
+VIN
PT5500
+VO
GND
Vo(adj)
3
5
(R1)
Adj Down
C1
C2
+
1
µF
Ceramic
100µF
(Optional)
(Req'd)
R2
Adjust Up
C O M
C O M
The values of (R1) [adjust down], and R2 [adjust up], can
also be calculated using the following formulas. Refer to
Figure 1 and Table 2 for both the placement and value of the
required resistor; either (R1) or R2 as appropriate.
Ro (Va – 0.9)
(R1)
=
=
– Rs
– Rs
kΩ
kΩ
Vo – Va
0.9 Ro
Va – Vo
R2
Where:
Vo = Original output voltage
Va = Adjusted output voltage
Ro = The resistance value from Table 1
Rs = The series resistance from Table 1
Table 1
ISR ADJUSTMENT RANGE AND FORMULA PARAMETERS
3.0 Adc Rated
1.5 Adc Rated
PT5501
PT5521
PT5502
PT5522
PT5503
PT5523
PT5504
PT5524
PT5505
PT5525
PT5506
PT5526
PT5507
PT5527
V
o
V
a
V
a
R
o
R
s
(nom)
(min)
(max)
(kΩ)
3.3
2.88
3.5
2.5
1.97
2.95
10.0
20.0
2.0
1.64
2.45
10.0
20.0
1.8
1.5
1.5
1.3
1.2
1.08
1.65
10.0
20.0
1.0
0.97
1.45
10.2
20.0
2.25
10.0
20.0
1.95
10.0
20.0
10.0
49.9
(kΩ)
For technical support and more information, see inside back cover or visit www.ti.com
Application Notes continued
PT5500/5520 Series
Table 2
ISR ADJUSTMENT RESISTOR VALUES
3.0 Adc Rated
1.5 Adc Rated
Vo (nom)
PT5501
PT5521
3.3
PT5502
PT5522
2.5
PT5503
PT5523
2.0
PT5504
PT5524
1.8
PT5505
PT5525
1.5
PT5506
PT5526
1.2
PT5507
PT5527
1.0
Va (req.d)
0.97
1.0
(0.0)kΩ
1.05
1.1
164.0kΩ
72.8kΩ
41.2kΩ
25.9kΩ
16.7kΩ
10.6kΩ
6.2kΩ
(0.0)kΩ
1.15
1.2
(30.0)kΩ
1.25
1.3
160.0kΩ
70.0kΩ
40.0kΩ
25.0kΩ
16.0kΩ
10.0kΩ
5.7kΩ
(0.0)kΩ
(10.0)kΩ
(30.0)kΩ
(90.0)kΩ
1.35
1.4
3.0kΩ
1.45
1.5
0.4kΩ
(0.0)kΩ
(6.0)kΩ
1.55
1.6
160.0kΩ
70.0kΩ
40.0kΩ
25.0kΩ
16.0kΩ
10.0kΩ
5.7kΩ
(15.0)kΩ
(30.0)kΩ
(60.0)kΩ
(150.0)kΩ
2.5kΩ
1.65
1.7
(1.4)kΩ
(6.7)kΩ
0.0kΩ
1.75
1.8
(14.0)kΩ
(25.0)kΩ
(43.3)kΩ
(80.0)kΩ
(190.0)kΩ
1.85
1.9
160.0kΩ
70.0kΩ
40.0kΩ
25.0kΩ
16.0kΩ
10.0kΩ
5.7kΩ
2.5kΩ
1.95
2.0
0.0kΩ
(2.0)kΩ
(5.6)kΩ
2.05
2.1
160.0kΩ
70.0kΩ
0.0kΩ
(10.0)kΩ
(15.7)kΩ
(23.3)kΩ
(34.0)kΩ
(50.0)kΩ
(76.7)kΩ
(130.0)kΩ
(284.0)kΩ
2.15
2.2
25.0kΩ
16.0kΩ
10.0kΩ
5.7kΩ
2.5kΩ
2.25
2.3
0.0kΩ
2.35
2.4
2.5kΩ
2.45
2.5
0.0kΩ
2.55
2.6
160.0kΩ
70.0kΩ
40.0kΩ
25.0kΩ
16.0kΩ
10.0kΩ
5.7kΩ
2.65
2.7
2.75
2.8
2.85
2.9
(0.0kΩ
(8.5)kΩ
2.5kΩ
2.95
3.0
0.0kΩ
(20.1)kΩ
(36.1)kΩ
(60.1)kΩ
(100.0)kΩ
(180.0)kΩ
(420.0)kΩ
3.05
3.1
3.15
3.2
3.25
3.3
3.35
3.4
130.0kΩ
40.1kΩ
3.45
3.48
R1 = (Blue)
10.1kΩ
0.0kΩ
R2 = Black
For technical support and more information, see inside back cover or visit www.ti.com
Application Notes
PT5500/5520 Series
Using the Inhibit Control on the PT5500/PT5520
Series of Excalibur Step-Down ISRs
For applications requiring output voltage On/Off control,
both the PT5500 and PT5520 series of power modules
incorporate an inhibit function. This function can be used
for power-up sequencing or wherever there is a require-
ment for the module to be switched off. The On/Off
function is provided by the Inhibit (pin 1) control.
Turn-On Time: In the circuit of Figure 1, turning Q1 on applies
a low-voltage to the Inhibit control (pin 1) and disables the
regulator output. Correspondingly, turning Q1 off allows the
Inhibit control pin to be pulled high by its internal pull-up
resistor. The ISR produces a fully regulated output voltage
within 10-msec of the release of the Inhibit control pin. The
actual turn-on time will vary with input voltage, output
load, and the total amount of load capacitance. Figure 2
shows the typical rise in both output voltage and input
current for a PT5502 (2.5V) following the turn-off of Q1 at
time t =0. The waveform was measured with a 5Vdc input
voltage, and 2.5A resistive load.
The ISR functions normally with Pin 1 open-circuit,
providing a regulated output whenever a valid source
2
voltage is applied to Vin, (pin 2). When a low-level
ground signal is applied to pin 1, the regulator output
will be disabled.
Figure 1 shows an application schematic, which details
the typical use of the Inhibit function. Note the discrete
transistor (Q1). The Inhibit control has its own internal
pull-up to +Vin potential. An open-collector or open-
drain device is required to control this pin.
Figure 2
Vo (1V / Div)
The Inhibit pin control thresholds are given in Table 1.
Equation 1 may be used to determine the approximate
current drawn from the input source, and by Q1 when the
regulator is in the inhibit state.
IIN (1A / Div)
VINH (5V / Div)
Table 1; Inhibit Control Requirements
Parameter
Enable (V
Min
– 0.5
Max
)
V
Open
IH
in
–0.2V+0.5V
-1
0
1
2
3
4
5
6
7
8
Disable (V
)
IL
t (milli-secs)
Equation 1
Notes:
Iinh
= Vin ÷ 10kΩ
20%
1. Use an open-collector device (preferably a discrete
transistor) for the Inhibit input. A pull-up resistor is not
necessary. To disable the output voltage, the control pin
should be pulled low to less than +0.5VDC.
2. Do not control the Inhibit input with an external DC
voltage. This will lead to erratic operation of the ISR and
may over-stress the regulator.
Figure 1
5. Avoid capacitance greater than 500pF at the Inhibit
control pin. Excessive capacitance at this pin will cause
the ISR to produce a pulse on the output voltage bus at
turn-on.
+VIN
+VO
2
4
Vin PT5502
INH G N D
V o
1
3
C1,
(Optional)
1µF
+
C2
6. Keep the On/Off transition to less than 10µs. This
prevents erratic operation of the ISR, which could cause a
momentary high output voltage.
100µF
Q1
BSS138
Inhibit
COM
COM
For technical support and more information, see inside back cover or visit www.ti.com
PACKAGE OPTION ADDENDUM
www.ti.com
24-Jun-2005
PACKAGING INFORMATION
Orderable Device
PT5501A
PT5501C
PT5501N
PT5502A
PT5502C
PT5502N
PT5503A
PT5503C
PT5503N
PT5504A
PT5504C
PT5504N
PT5505A
PT5505C
PT5505N
PT5506A
PT5506C
PT5506N
PT5507A
PT5507C
PT5507N
Status (1)
NRND
NRND
NRND
NRND
NRND
NRND
NRND
NRND
NRND
NRND
NRND
NRND
NRND
NRND
NRND
NRND
NRND
NRND
NRND
NRND
NRND
Package Package
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Qty
Type
Drawing
SIP MOD
ULE
EFL
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
30
30
30
30
30
30
30
30
30
30
30
30
30
30
30
30
30
30
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
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EFM
EFK
EFL
EFM
EFK
EFL
EFM
EFK
EFL
EFM
EFK
EFL
EFM
EFK
EFL
EFM
EFK
EFL
EFM
EFK
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30
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(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
Eco Plan
24-Jun-2005
(2)
-
The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS
&
no Sb/Br)
-
please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
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Addendum-Page 2
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amplifier.ti.com
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dataconverter.ti.com
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www.ti.com/digitalcontrol
www.ti.com/military
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logic.ti.com
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power.ti.com
Optical Networking
Security
www.ti.com/opticalnetwork
www.ti.com/security
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www.ti.com/video
microcontroller.ti.com
Telephony
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