TEXAS INSTRUMENTS SLTS025B Technical data

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PT5020 Series

Positive Input/Negative Output
Integrated Switching Regulator

Standard Application

+V

in

1

COM

C1 = Optional ceramic (1-5µF)
C2 = Required Electrolytic (100µF)

PT5020

2

3

C

2

C

1

100µF

+

–V

COM

SLTS025B

(Revised 12/19/2001)

Features

• Negative Output

• Input Voltage Range:

+4.75 to +7 Volts

• Laser-Trimmed

• Small Footprint

• Soft Start

• 5-Pin Mount Option

(Suffixes L & M)

Pin-Out Information

Pin Function

1V

in

2 GND

out

3V

out

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
PT5031 o = -1.7 Volts

Description

The PT5020 series of integrated
switching regulators (ISRs) convert a
positive input voltage, typically +5V, to a
negative output voltage for a wide range of
analog and datacom applications.

These Plus to Minus ISRs incorporate
a “Buck-Boost” topology and are packaged
in the 3-pin, single in-line pin (SIP)
package configuration.

PT Series Suffix

Case/Pin Order Package
Configuration Suffix Code *

Vertical N (EAD)
Horizontal A (EAA)
SMD C (EAC)
Horizontal, 2-pin Tab M (EAM)
SMD, 2-Pin Tab L (EAL)

* Previously known as package styles 100/110.
(Reference the applicable package code drawing

for the dimensions and PC board layout)

NOTE: PT5020 ISRs are not Short-Circuit Protected.

(PT1234x )

Specifications (Unless otherwise stated, T

=25°C, Vin =5V, Io =Iomax, C2 =100µF)

a

PT5020 SERIES

Characteristics Symbol Conditions Min Typ Max Units

Output Current I

Input Voltage Range V
Output Voltage Tolerance ∆V

Line Regulation Reg

Load Regulation Reg

o

in

o

line

load

Efficiency η I

Vo Ripple (pk-pk) V

Transient Response t

Current Limit I

Inrush Current I

Switching Frequency ƒ

Operating Temperature Range T

Thermal Resistance

Storage Temperature T

r

tr

lim

ir

t

ir

s

a

θ

ja

s

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

Mechanical Vibration Suffixes N, A, & C — 5 —
Per Mil-STD-883D, 20-2000 Hz Suffixes L & M — 20 —

Weight Suffixes N, A, & C — 4.5 —

Over Vin range Vo= –1.7V to –6.5V 0.25

= –9V 0.10

V

o

= –12V 0.10

V

o

Vo= –15V 0.10

Over Io range 4.75 — 7

Over Vin Range
Ta = -20°C to SOA limit

(3)

Over Vin range — ±0.5 ±1 %V

I

min ≤ Io ≤ I

o

=0.5 Iomax — 75 — %

o

max — ±0.5 ±1 %V

o

20MHz bandwidth — ±2 ±5 %V

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

On start up — 1.0

Over I

range Vo =1.7 to 8V 0.8 1 1.2 MHz

o

Vo ≥8 V 500 650 800 kHz

— -20 — +85

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

1 msec, Half Sine, mounted to a fixture

Suffixes L & M — 6.5

(1)

— 1.0

(1)

—0.60

(1)

—0.50

(1)

—0.30

(2)

— ±1.5 ±3 %V

—150— %I

(3)

— 1.0 — mSec

—A

(4)

-40 — +125 °C

— 500 — G’s

(5)

—

Notes: (1) The ISR will operate at no load with reduced specifications.

(2) For applications with input voltages greater than 7 VDC, use the PT78NR100 Series.
(3) The inrush current stated is above the normal input current for the associated output load.
(4) See Safe Operating Area curves or consult the factory for the appropriate derating
(5) The tab pins on the 5-pin mount package types (suffixes L & M) must be soldered. For more information see the applicable package outline drawing.

A

V

o

°C

G’s

grams

o

o

o

o

o

max

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

PT5020 Series

Positive Input/Negative Output
Integrated Switching Regulator

T ypical Characteristics

PT5024 (-12VDC) (See Note A)

Efficiency vs Output Current

100

90

80

70

Efficiency - %

60

50

40

0 0.1 0.2 0.3 0 .4 0 .5

Iout-(Amps)

Ripple Voltage vs Output Current

160

140

120

100

80

Ripple-(mV)

60

40

20

0

0 0.1 0.2 0.3 0.4 0.5

Vin

7.0V

6.5V

6.0V

5.5V

5.0V

4.75V

Vin

4.75V

5.0V

5.5V

6.0V

6.5V

7.0V

PT5022 (-5VDC) (See Note A)

Efficiency vs Output Current

100

90

80

70

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

60

50

40

0 0 .2 0.4 0.6 0.8 1

Iout-(Amps)

Ripple Voltage vs Output Current

100

80

60

40

20

0

0 0.2 0 .4 0 .6 0 .8 1

Iout-(Amps)Iout-(Amps)

Vin

7.0V

6.5V

6.0V

5.5V

5.0V

4.75V

Vin

4.75V

5.0V

5.5V

6.0V

6.5V

7.0V

Power Dissipation vs Output Current

2

1.5

1

PD-(Watts)

0.5

0

0 0.1 0.2 0.3 0.4 0.5

Iout-(Amps)

Safe Operating Area (VIN=5V) (See Note B)

90

80

70

60

50

40

30

Ambient Temperature - (C°)

20

0.0 0.1 0.2 0.3 0.4 0.5

Airflow

90 LFM

60 LFM

0 LFM

Vin

4.75V

5.0V

5.5V

6.0V

6.5V

7.0V

Power Dissipation vs Output Current

2.5

2

1.5

1

0.5

0

0 0.2 0.4 0.6 0.8 1

Iout-(Amps)

Safe Operating Area (VIN=5V) (See Note B)

90

80

70

60

50

40

30

Ambient Temperature - (C°)

20

0 0.2 0.4 0.6 0.8 1

Maximum Output Current - (Amps)Maximum Output Current - (Amps)

Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter.
Note B: Thermal derating graphs are developed in free-air convection cooling, which corresponds to approximately 40–60LFM of airflow.

Vin

Airfl ow

0 LFM

60 LFM

90 LFM

4.75V

5.0V

5.5V

6.0V

6.5V

7.0V

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