PT5521A [TI]

1.5-A 5-V/3.3-V Input Adjustable Integrated Switching Regulator; 1.5 -A 5 -V / 3.3 - V输入可调集成开关稳压器


型号：	PT5521A
厂家：	TEXAS INSTRUMENTS
描述：	1.5-A 5-V/3.3-V Input Adjustable Integrated Switching Regulator 1.5 -A 5 -V / 3.3 - V输入可调集成开关稳压器稳压器开关
文件：	总9页 (文件大小：185K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

PT5520 Series

1.5-A 5-V/3.3-V Input Adjustable

Integrated Switching Regulator

SLTS147A

(Revised 10/5/2001)

Features

• Single-Device: 5V/3.3V Input

• DSP Compatible

• 89% Efficiency

• Small Footprint

• Space-Saving package

• Adjustable Output Voltage

• Output Inhibit Function

• Short Circuit Protection

• Solderable Copper Case

Description

Ordering Information

PT 5521¨ =3.3Volts

PT 5522¨ =2.5Volts

PT 5523¨ =2.0Volts

PT 5524¨ =1.8Volts

PT 5525¨ =1.5Volts

PT 5526¨ =1.2Volts

PT 5527¨ =1.0Volts

Pin-Out Information

Pin Function

The PT5520 Excalibur™ power modules

are a series of high-performance Integrated

Switching Regulators (ISRs). Rated 1.5A,

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 PT5520 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.

Inhibit *

GND

V_o

V_oAdjust

* For Inhibit pin:

Open = output enabled

Ground = output disabled

PT Series Suffix

(PT1234x)

Case/Pin

Configuration

O rder

Suffix

Package

Code

Vertical

Horizontal

SMD

(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

V_OADJ

PT5520

+V_IN

+V_O

C ₁

C₂

C O M

= Optional 1µF ceramic

= Required 100µF (See Notes)

For technical support and more information, see inside back cover or visit www.ti.com

PT5520 Series

1.5-A 5-V/3.3-V Input Adjustable

Integrated Switching Regulator

Specifications (Unless otherwise stated, T_a=25°C, V_in=5V,C_out=100µF, and I_o=I_omax)

PT5520 SERIES

Typ

Characteristics

Symbols

Conditions

Min

Max

Units

Output Current

InputVoltageRange

I_o

V_in

Over V_inrange

Over I_orange

0.1 ⁽¹⁾

=3.3V4.5

—

1.5

5.5

V_o

V_o≤2.5V3.1

5.5

Set-PointVoltageTolerance

TemperatureVariation

Line Regulation

Load Regulation

TotalOutputVariation

V_otol

—

0.5

—

%V_o

∆Reg_temp

∆Reg_line

∆Reg_load

∆Reg_tot

–40°C <T_a<+85°C

Over V_inrange

Over I_orange

Includes set-point, line, load,

—

%V_o

–40°C ≤ T_a≤ +85°C

Efficiency

PT5521

PT5522

PT5523

PT5524

PT5525

PT5526

PT5527

—

V_oRipple (pk-pk)

V_r

20MHz bandwidth

—

Transient Response

t_tr

∆V_tr

1A/µs load step from 50% to 100% I_omax

V_oover/undershoot

—

100

µSec

Current Limit

Switching Frequency

I_lim

ƒ_o

—

kHz

Over V_inand I_oranges

600 ⁽²⁾

Inhibit Control (pin1)

InputHighVoltage

InputLowVoltage

Input Low Current

(3)

V _IH

V _IL

I_IL

C_out

Referenced to GND (pin3)

Pin 1 to GND

V_in–0.5

–0.2

—

Open

0.5

—

–0.5

—

µF

°C

(4)

External Capacitance

100

—

Absolute Maximum

Over V_inrange

—

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

-40

—

500

+125

—

°C

G’s

MechanicalVibration

Per Mil-STD-883D, Method 2007.2,

20-2000 Hz, Soldered in a PC board

—

(7)

—

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 PT5520 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.

(5) For operation below 0°C, the output capacitor C₂must 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

PT5520 Series

1.5-A 5-V/3.3-V Input Adjustable

Integrated Switching Regulator

Performance Data; V_in=5.0V (See Note A)

Performance Data; V_in=3.3V (See Note A)

Efficiency vs Output Current

100

PT5521

PT5522

PT5523

PT5524

PT5525

PT5526

PT5527

PT5522

PT5523

PT5524

PT5525

PT5526

PT5527

0.3

0.6

0.9

1.2

1.5

0.3

0.6

0.9

1.2

1.5

Iout (A)

Ripple vs Output Current

PT5522

PT5523

PT5524

PT5521

PT5525

PT5526

PT5527

PT5522

PT5523

PT5524

PT5525

PT5526

PT5527

0.3

0.6

0.9

1.2

1.5

0.3

0.6

0.9

1.2

1.5

Iout (A)

Power Dissipation vs Output Current

0.8

0.6

0.4

0.2

0.75

0.6

0.45

0.3

0.15

PT5521

PT5522

PT5523

PT5524

PT5525

PT5526

PT5527

PT5522

PT5523

PT5524

PT5525

PT5526

PT5527

0.3

0.6

0.9

1.2

1.5

0.3

0.6

0.9

1.2

1.5

Iout (A)

Safe Operating Area; V_in=5.0V (See Note B)

Safe Operating Area; V_in=3.3V (See Note B)

90.0

80.0

70.0

60.0

50.0

40.0

30.0

20.0

90.0

80.0

70.0

60.0

50.0

40.0

30.0

20.0

Airflow

200LFM

120LFM

60LFM

200LFM

120LFM

60LFM

Nat conv

0.0

0.3

0.6

0.9

1.2

1.5

0.0

0.3

0.6

0.9

1.2

1.5

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 V_a(min) and V_a(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 V_oadj to either GND or

V_out. Any capacitance added to the V_oadjust 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 (V_oadj) and pin 3 (GND).

V_in(min) = (V_a+ 0.5)V or as specified in the data sheet,

whichever is greater.

Adjust Down: Add a resistor (R₁), between pin 5 (V_oadj) and

pin 4 (V_out).

Figure 1

V in

V o

+V_IN

PT5500

+V_O

GND

Vo(adj)

(R1)

Adj Down

µF

Ceramic

100µF

(Optional)

(Req'd)

Adjust Up

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 R₂as appropriate.

R_o(V_a– 0.9)

(R₁)

– R_s

kΩ

V_o– V_a

0.9 R_o

V_a– V_o

R₂

Where:

V_o= Original output voltage

V_a= Adjusted output voltage

R_o= The resistance value from Table 1

R_s= 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

(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

1.3

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

V_o(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

V_a(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 Q₁on applies

a low-voltage to the Inhibit control (pin 1) and disables the

regulator output. Correspondingly, turning Q₁off 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 Q₁at

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

voltage is applied to V_in, (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 +V_inpotential. An open-collector or open-

drain device is required to control this pin.

Figure 2

V_o(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 Q₁when the

regulator is in the inhibit state.

I_IN(1A / Div)

V_INH(5V / Div)

Table 1; Inhibit Control Requirements

Parameter

Enable (V

Min

– 0.5

Max

)

Open

–0.2V+0.5V

-1

Disable (V

)

t (milli-secs)

Equation 1

Notes:

I_inh

= V_in÷ 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.

+V_IN

+V_O

Vin PT5502

INH G N D

V o

C1,

(Optional)

1µF

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

BSS138

Inhibit

COM

For technical support and more information, see inside back cover or visit www.ti.com

PACKAGE OPTION ADDENDUM

www.ti.com

28-Aug-2012

PACKAGING INFORMATION

Status ⁽¹⁾

Eco Plan ⁽²⁾

MSL Peak Temp ⁽³⁾

Samples

Orderable Device

Package Type Package

Drawing

Pins

Package Qty

Lead/

Ball Finish

(Requires Login)

PT5521A

PT5521C

PT5522A

PT5522C

PT5523A

PT5523C

PT5523N

PT5524A

PT5525A

PT5525C

PT5526A

PT5526C

PT5527A

PT5527C

PT5527N

NRND

SIP MODULE

EFL

EFM

EFL

EFM

EFL

EFM

EFK

EFL

EFM

EFL

EFM

EFL

EFM

EFK

Pb-Free (RoHS)

TBD

Call TI

N / A for Pkg Type

Level-3-215C-168HRS

N / A for Pkg Type

Level-3-215C-168HRS

N / A for Pkg Type

Level-3-215C-168HRS

Call TI

Pb-Free (RoHS)

TBD

N / A for Pkg Type

Level-3-215C-168HRS

N / A for Pkg Type

Level-3-215C-168HRS

Call TI

OBSOLETE SIP MODULE

NRND

SIP MODULE

TBD

Call TI

TBD

Call TI

⁽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.

⁽²⁾Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), 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.

Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between

the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.

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.

Addendum-Page 1

PACKAGE OPTION ADDENDUM

www.ti.com

28-Aug-2012

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information

provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and

continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.

TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

Addendum-Page 2

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PT5521A [TI]

相关型号：

PT5521C

PT5521N

PT5522

PT5522A

PT5522C

PT5522N

PT5523

PT5523A

PT5523C

PT5524

PT5524A

PT5524C