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

For assistance or to order, call	[phone]					Application Notes
						Mechanical Outline
P T 5 0 2 0		S e r i e s				Product Selector Guide
				POSITIVE INPUT/NEGATIVE OUTPUT		Revised 5/15/98
				INTEGRATED SWITCHING REGULATOR
		•	Input Voltage Range:		The Power Trends’ PT5020 ISRs
			4.75 to 7 Volts		convert a positive input voltage (typ +5V)
		• Complete Solution With Only			to a negative output voltage for a wide
			One External Capacitor Required		range of analog and communication cir-
		•	Soft Start		cuit applications.
					The Plus to Minus ISRs use a “Buck-
					Boost” topology and are packaged in the
					3 pin SIP configuration.

Pin-Out Information

Ordering Information

PT Series Suffix (PT12345X)

Pin

Function

PT5021 o = -3.3 Volts

Case/Pin

Standard Application

1

Vin

PT5022 o = -5 Volts

Configuration

PT5023 o = -9 Volts

Vertical Through-Hole

N

2

GND

PT5024 o = -12 Volts

Horizontal Through-Hole

A

3

Vout

1

3

PT5025 o = -15 Volts

Horizontal Surface Mount

C

VIN

VOUT

PT5020

PT5026 o = -5.2 Volts

(+)

(-)

Pkg Style 100

PT5027 o = -8.0 Volts

C2

C3

2

PT5028 o = -6.5 Volts

COM

COM

C2 = Optional ceramic (1-5µF)

PT5029 o = -5.5 Volts

PT5030 o = -6.0 Volts

C3 = Required Electrolytic (100µF)

Specifications

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

Characteristics

PT5020 SERIES

(Ta=25°C unless noted)

Symbols

Conditions

Min

Typ

Max

Units

Output Current

Io

Over Vin range Vo=-3.3V to 6.5V

0.25*

—

1.0

A

Vo=-9V

0.10*

—

0.60

A

Vo=-12V

0.10*

—

0.50

A

Vo=-15V

0.10*

—

0.30

A

Current Limit

Icl

Vin = 5V

—

1.5 Io max

—

A

Inrush Current

Iir

Vin = +5V @ max Io

—

1.0

—

A

tir

On start up

—

1.0

—

mSec

Short Circuit Current

Isc

Vin = 5V

—

2 Io max

—

A

Input Voltage Range

Vin

Io = 0.1 to Io max

4.75

—

7**

V

Output Voltage Tolerance

Vo

Over Vin Range

Io= Imax

—

±1.5

±3

%Vo

Ta = -20°C to shutdown

Line Regulation

Regline

Over Vin range

—

±0.5

±1

%Vo

Load Regulation

Regload

Imin ≤ Io ≤ Imax

—

±0.5

±1

%Vo

Vo Ripple/Noise

Vn

Vin=5V, Io= Imax

—

±2

±5

%Vo

Transient Response

ttr

25% load change

—

500

—

µSec

Vo over/undershoot

—

3.0

5.0

%Vo

Efficiency

η

Vin=5V, Io=0.5 Imax

—

75

—

%

Switching Frequency

ƒO

Over Io range

Vo=3.3 to 8V

0.8

1

1.2

MHz

Vo ≥ 8 V

500

650

800

kHz

Absolute Maximum

Ta

—

-20

—

+85

°C

Operating Temperature Range

Recommended Operating

Ta

Free Air Convection, (40-60 LFM)

-20

—

+65***

°C

Temperature Range

Over Vin and Io range

Thermal Resistance

θja

Free Air Convection

—

50

—

°C/W

(40-60LFM)

Storage Temperature

Ts

-40

—

+125

°C

Mechanical Shock

Per Mil-STD-883D, Method 2002.3

—

500

—

G’s

1 msec, Half Sine, mounted to a fixture

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.

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