Texas Instruments PT6424D, PT6424E, PT6424P, PT6425D, PT6425E Datasheet

For assistance or to order, call

[phone]

Application Notes

Mechanical Outline

P T 6 4 2 0

S e r i e s

Product Selector Guide

3 AMP ADJUSTABLE INTEGRATED

Revised 5/15/98

SWITCHING REGULATOR

•

Adjustable Output Voltage

The PT6420 is a new addition to

•

85% Efficiency

the Power Trends high performance

•

Small SIP Footprint

+5V to +3.3V, 3Amp family of 14-Pin

•

Input Voltage Range: 4.5V to 5.5V

SIP (Single In-line Package) Integrated

•

Remote Sense Capability

Switching Regulators (ISRs). Only two

external capacitors are required for

proper operation.

Please note that this product does

not include short circuit protection.

Pin-Out Information

Ordering Information

PT Series Suffix (PT1234X)

Pin

Function

PT6424¨ = +1.5 Volts

Case/Pin

1

Remote Sense

PT6425¨ = +3.3 Volts

Configuration

P

Standard Application

2

Do not connect

PT6426¨ = +1.8 Volts

Vertical Through-Hole

Remote

3

Do not connect

PT6427¨ = +2.1 Volts

Horizontal Through-Hole

D

Sense

4

Vin

PT6428¨ = +1.2 Volts

Horizontal Surface Mount

E

1

PT6429¨ = +2.5 Volts

VIN

PT6420

VOUT

5

Vin

4,5,6

11,12,13

R1

6

Vin

C1

+

7,8,9,10

14

(VOUP)

C2 +

7

GND

100µF

100µF

R2

8

GND

Pkg Style 310

COM

(VODOWN)

COM

Note: Back surface

9

GND

PT6420

of product is

C1 = Required 100µF electrolytic

10

GND

POWER TRENDS

conducting metal.

C2 = Required 100µF electrolytic

11

Vout

		12	Vout
		13	Vout
Specifications	14		Vout Adjust
Characteristics					PT6420 SERIES
(Ta = 25°C unless noted)	Symbols		Conditions		Min	Typ	Max	Units
Output Current	Io		4.5V ≤ Vin ≤ 5.5V		0	—	3.0	A
Current Limit	Icl		Vin = +5V		—	3.6	5.0	A
Input Voltage Range	Vin		0.1A ≤ Io ≤ 3.0A		4.5	—	5.5	V
Output Voltage Tolerance	Vo		Vin = +5V, Io = 3.0A		Vo-0.05	3.3	Vo+0.05	V
			0°C ≤ Ta ≤ +70°C
Line Regulation	Regline		4.5V ≤ Vin ≤ 5.5V, Io = 3.0A		—	±10	±25	mV
Load Regulation	Regload		Vin = +5V, 0.3 ≤ Io ≤ 3.0A		—	±10*	±25*	mV
Vo Ripple/Noise	Vn		Vin = 5V, Io = 3.0A		—	66	165	mVpp
Transient Response	ttr		Io step between 1.5A and 3.0A		—	200	—	µSec
with C2 = 100µF	Vos		Vo over/undershoot		—	200	—	mV

Efficiency η Vin = +5V, Io = 1.5A Vo= 3.3V Vo= 1.8V Vo= 2.1V Vo= 1.2V

—	85	—	%
—	74	—	%
—	77	—	%
—	63	—	%

		Switching Frequency	ƒo	4.5V ≤ Vin ≤ 5.5V			500	650	800	kHz
				0.3A ≤ Io ≤ 3.0A
		Absolute Maximum	Ta				0	—	+85	°C
		Operating Temperature Range
		Recommended Operating	Ta	Free Air Convection (40-60 LFM)			0	—	+70**	°C
		Temperature Range		At Vin= 5V, Io=2.5A
		Thermal Resistance	θja	Free Air Convection (40-60 LFM)			—	25	—	°C/W
		Storage Temperature	Ts	—			-40	—	+125	°C
		Mechanical Shock		Per Mil-STD-883D, Method 2002.3 , 1 msec,			—	500	—	G’s
				Half Sine, mounted to a fixture
		Mechanical Vibration		Per Mil-STD-883D, Method 2007.2,			—	15	—	G’s
				20-2000 Hz, Soldered in a PC board
		Weight	—	—			—	6.5	—	grams
		*When used with remote sense function.
		**See Thermal Derating chart.
		Note: The PT6420 Series requires two 100µF electrolytic or tantalum capacitors for proper operation in all applications.
26
		Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555			[phone]	Fax: [phone]	http://www.powertrends.com

For assistance or to order, call [phone]

P T 6 4 2 0 S e r i e s

C H A R A C T E R I S T I C D A T A

Efficiency - %

PT6428 1.2 VDC (See Note 1)

PT6427, 2.1 VDC (See Note 1)

Efficiency vs Output Current

10 0

9 0

8 0

7 0

6 0

5 0

4 0

0.0

0.5

1.0

1.5

2.0

2.5

3.0

Iout-(Amps)

				Efficiency vs Output Current
			10 0
			9 0
	Vin	- %		V in
			8 0	4.5 V
	4.5V	Efficiency
	5.0V		7 0	5.0 V
	5.5V		6 0	5.5 V

5 0

4 0

0

0.5

1

1.5

2

2.5

3

Iout-(Amps)

PT6425, 3.3 VDC (See Note 1)

	Efficiency vs Output Current
	100
	90
- %	80						Vin
Efficiency
	60						4.5V
	70						5.0V
							5.5V
	50
	40
	0	0.5	1	1.5	2	2.5	3

Iout-(Amps)

		Ripple vs Output Current								Ripple vs Output Current												Ripple vs Output Current
	100								10 0												100
	80								8 0								Vin				80
(mV)	60						V in	(mV)	6 0											(mV)	60					5.5V
																			5.5V						Vin
-								-											5.0V	-
Ripple							5 .0V	Ripple												Ripple						5.0V
	40						5 .5V		4 0										4.5V		40					4.5V

20	4 .5V	2 0	20

0								0							0
								0	0.5	1	1.5	2	2.5	3	0	0.5	1	1.5	2	2.5	3
0		0.5	1	1.5	2	2.5	3
				Iout-(Amps)							Iout-(Amps)							Iout-(Amps)

		Thermal Derating (Ta)						(See Note 2)							Thermal Derating (Ta)					(See Note 2)								Thermal Derating (Ta)					(See Note 2)
	3												3													3
																						85°C
	2.5								85°C				2.5													2.5								85°C
(Amps)-	2											(Amps)-	2												(Amps)-	2
	1.5												1.5													1.5
Iout												Iout													Iout
																										1
	1												1
	0.5												0.5													0.5
																										0
	0												0
																										4.5			4.75		5		5.25		5.5
	4.5			4 .7 5		5		5 .2 5		5.5			4.5			4.75		5		5.25		5.5

				Vin-(Volts)
	Power Dissipation vs Output Current
	3.0
(Watts)-	2.5						Vin
	1.5						5.0V
	2.0						5.5V
PD	1.0						4.5V
	0.5
	0.0
	0.0	0.5	1.0	1.5	2.0	2.5	3.0

Iout-(Amps)

Vin-(Volts)

Power Dissipation vs Output Current

	2.5
	2						Vin
(Watts)-PD
	1						4 .5 V
	1.5						5 .5 V
							5 .0 V
	0.5
	0
	0	0.5	1	1.5	2	2.5	3

Iout-(Amps)

Vin-(Volts)

Power Dissipation vs Output Current

	2
	1.8
(Watts)-	1.6
	1.4						Vin
	1.2						5.5V
PD	1						5.0V
	0.8						4.5V
	0.6
	0.4
	0.2
	0
	0	0.5	1	1.5	2	2.5	3

Iout-(Amps)

Note 1: All data listed in the above graphs except for derating data has been developed from actual products tested at 25°C. This data is considered typical data for the ISR. Note 2: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application Notes.)

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

www.powertrends.com

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