Texas Instruments PT5021A, PT5021C, PT5021J, PT5021N, PT5022A Datasheet

For assistance or to order, call [phone]

Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 [phone] Fax: [phone] http://www.powertrends.com

42

Application Notes

Mechanical Outline

Product Selector Guide

Revised 5/15/98

Ordering Information

PT5021 o = -3.3 Volts
PT5022 o = -5 Volts
PT5023 o = -9 Volts
PT5024 o = -12 Volts
PT5025 o = -15 Volts
PT5026 o = -5.2 Volts
PT5027 o = -8.0 Volts
PT5028 o = -6.5 Volts
PT5029 o = -5.5 Volts
PT5030 o = -6.0 Volts

Pin Function

1

V

in

2

GND

3

V

out

Standard Application

C2 = Optional ceramic (1-5µF)
C3 = Required Electrolytic (100µF)

PT Series Suffix

(PT12345X)

Case/Pin
Configuration

Vertical Through-Hole

N

Horizontal Through-Hole

A

Horizontal Surface Mount

C

• Input Voltage Range:

4.75 to 7 Volts

• Complete Solution With Only

One External Capacitor Required

• Soft Start

The Power Trends’ PT5020 ISRs
convert a positive input voltage (typ +5V)
to a negative output voltage for a wide
range of analog and communication cir­cuit applications.

The Plus to Minus ISRs use a “Buck­Boost” topology and are packaged in the
3 pin SIP configuration.

NOTE: Buck-Boost Topology ISRs are not Short-Circuit Protected.

POSITIVE INPUT/NEGATIVE OUTPUT
INTEGRATED SWITCHING REGULATOR

PT5020 Series

V

IN

(+)

COM

PT5020

COM

V

OUT

(-)

C2

C3

Pin-Out Information

1

2

3

Pkg Style 100

Specifications

Characteristics

PT5020 SERIES

(Ta=25°C unless noted) Symbols Conditions Min Typ Max Units

Output Current I

o

Over Vin range Vo=-3.3V to 6.5V 0.25* — 1.0 A

V

o

=-9V 0.10* — 0.60 A

V

o

=-12V 0.10* — 0.50 A

Vo=-15V 0.10* — 0.30 A

Current Limit I

cl

Vin = 5V — 1.5 I

o max

—A

Inrush Current I

ir

Vin = +5V @ max I

o

— 1.0 — A

t

ir

On start up — 1.0 — mSec

Short Circuit Current I

sc

Vin = 5V — 2 I

o max

—A

Input Voltage Range V

in

Io = 0.1 to I

o max

4.75 — 7** V

Output Voltage Tolerance ∆V

o

Over Vin Range Io= I

max

— ±1.5 ±3 %V

o

Ta = -20°C to shutdown

Line Regulation Reg

line

Over Vin range — ±0.5 ±1 %V

o

Load Regulation Reg

load

I

min

≤ Io ≤ I

max

— ±0.5 ±1 %V

o

Vo Ripple/Noise V

n

Vin=5V, Io= I

max

—±2 ±5%V

o

Transient Response t

tr

25% load change — 500 — µSec
Vo over/undershoot — 3.0 5.0 %V

o

Efficiency η Vin=5V, Io=0.5 I

max

—75 —%

Switching Frequency ƒ

O

Over Io range Vo=3.3 to 8V 0.8 1 1.2 MHz

Vo ≥ 8 V 500 650 800 kHz

Absolute Maximum T

a

— -20 — +85 °C

Operating Temperature Range
Recommended Operating T

a

Free Air Convection, (40-60 LFM) -20 — +65*** °C

Temperature Range Over Vin and Io range
Thermal Resistance

θ

ja

Free Air Convection — 50 — °C/W
(40-60LFM)

Storage Temperature T

s

-40 — +125 °C

Mechanical Shock Per Mil-STD-883D, Method 2002.3

1 msec, Half Sine, mounted to a fixture — 500 — G’s

Mechanical Vibration Per Mil-STD-883D, Method 2007.2,

—5 —G’s

20-2000 Hz, Soldered in a PC board

Weight — 4.5 — grams

* ISR will operate down to no load with reduced specifications.
** For applications with input voltages greater than 7 VDC, use the PT78NR100 Series.
*** See SOA Curves.

For assistance or to order, call [phone]

Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 [phone] Fax: [phone] http://

www.powertrends.com

43

5V to 3.x Converters

5V Bus Products

DATA SHEETS

CHARACTERISTIC DATA

PT5022 (-5VDC) (See Note 1)

Efficiency vs Output Current

Ripple Voltage vs Output Current

Power Dissipation vs Output Current

Note 1: All data listed in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the ISR.

PT5024 (-12VDC) (See Note 1)

Efficiency vs Output Current

Ripple Voltage vs Output Current

Power Dissipation vs Output Current

Safe Operating Area (VIN=5V)

Safe Operating Area (VIN=5V)

CHARACTERISTIC DATA

PT5020 Series

Efficiency - %Ripple-(mV)PD-(Watts)

Iout-(Amps)

Iout-(Amps)

PD-(Watts)

40

50

60

70

80

90

100

0 0.1 0.2 0.3 0.4 0.5

7.0V

6.5V

6.0V

5.5V

5.0V

4.75V

Vin

Ripple-(mV)

Iout-(Amps)

Iout-(Amps)

Ambient Temperature - (C°)

Ambient Temperature - (C°)

Maximum Output Ciurrent - (Amps)Maximum Output Ciurrent - (Amps)

Iout-(Amps)Iout-(Amps)

0

0.5

1

1.5

2

0 0.1 0.2 0.3 0.4 0.5

4.75V

5.0V

5.5V

6.0V

6.5V

7.0V

Vin

0

20

40

60

80

100

120

140

160

0 0.1 0.2 0.3 0.4 0.5

4.75V

5.0V

5.5V

6.0V

6.5V

7.0V

Vin

40

50

60

70

80

90

100

0 0.2 0.4 0.6 0.8 1

7.0V

6.5V

6.0V

5.5V

5.0V

4.75V

Vin

0

0.5

1

1.5

2

2.5

0 0.2 0.4 0.6 0.8 1

4.75V

5.0V

5.5V

6.0V

6.5V

7.0V

Vin

0

20

40

60

80

100

0 0.2 0.4 0 .6 0 .8 1

4.75V

5.0V

5.5V

6.0V

6.5V

7.0V

Vin

Efficiency - %

20

30

40

50

60

70

80

90

0 0.2 0.4 0 .6 0.8 1

0 LFM

60 LFM

90 LFM

Airflow

20

30

40

50

60

70

80

90

0.0 0.1 0.2 0.3 0.4 0.5

90 LFM

60 LFM

0 LFM

Airflow

IMPORTANT NOTICE

T exas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.

CERT AIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICA TIONS IS UNDERSTOOD T O
BE FULLY AT THE CUSTOMER’S RISK.

In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.

TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.

Copyright  1999, Texas Instruments Incorporated