Texas Instruments PT6405D, PT6405E, PT6405P, PT6406D, PT6406E Datasheet

	For assistance or to order, call [phone]			Application Notes
				Mechanical Outline
	P T 6 4 0 0	S e r i e s		Product Selector Guide
			3 AMP ADJUSTABLE	Revised 5/15/98
			INTEGRATED SWITCHING REGULATOR

•Single-Device 5V to 3V Power

•85% Efficiency

•Small SIP Footprint

•Adjustable Output Voltage

The PT6400 is a high performance +5V to +3.3V, 3 Amp, 12-Pin SIP (Single In-line Package) Integrated Switching Regulator (ISR) designed for stand alone (not parallelable) operation. This highperformance ISR allows easy integration

of low-power 3.3V logic IC’s into existing 5V systems without redesigning the central power supply. Only two external capacitors are required for proper operation. The output voltage is easily adjustable with one external resistor. The PT6406,7,8 can be used to terminate high-speed data buses such as Futurebus (+2.1V) or the new GTL (+1.2V) logic buses.

Please note that this product does not include short circuit protection.

Pin-Out Information

Ordering Information

PT Series Suffix (PT1234X)

Pin Function

PT6404¨ = +1.5 Volts

Case/Pin

1

Do not connect

PT6405¨ = +3.3 Volts

Configuration

P

2

Vin

PT6406¨ = +1.8 Volts

Vertical Through-Hole

Standard Application

3

Vin

PT6407¨ = +2.1 Volts

Horizontal Through-Hole

D

4

Vin

PT6408¨ = +1.2 Volts

Horizontal Surface Mount E

PT6409¨ = +2.5 Volts

VIN

2,3,4

PT6400

9,10,11

VOUT

5

GND

R1

6

GND

+

5,6,7,8

(VO UP)

C2 +

C1

12

7

GND

100µF

100µF

R2

8

GND

Pkg Style 300

COM

(V ODOWN)

COM

9

Vout

PT6400

Note: Back surface

C1 = Required 100µF electrolytic

10

Vout

of product is

C2 = Required 100µF electrolytic

11

Vout

conducting metal.

12

VoutAdjust

Specifications

Characteristics

PT6400 SERIES

(Ta = 25°C unless noted)

Symbols

Conditions

Min

Typ

Max

Units

Output Current

Io

4.5V ≤ Vin ≤ 5.5V

0.1*

—

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

—

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

mV

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
*ISR will operate down to no load with reduced specifications

**See Thermal Derating chart.

Note: The PT6400 Series requires two 100µF electrolytic or tantalum capacitors for proper operation in all applications.

24	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 0 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

PT6408, 1.2 VDC (See Note 1)

PT6407, 2.1 VDC (See Note 1)

PT6405, 3.3 VDC (See Note 1)

		Efficiency vs Output Current																			Efficiency vs Output Current
	10 0																			10 0
	9 0																	Vin		9 0															Vin
- %	8 0																		- %	8 0
																		4.5V																	4.5V
Efficiency	7 0																	5.0V	Efficiency	7 0															5.0V
	6 0																	5.5V		6 0															5.5V
	5 0																			5 0
	4 0
																				4 0
	0.0			0.5		1.0		1.5		2.0		2.5		3.0
																				0		0.5		1		1.5		2		2.5		3
								Iout-(Amps)																		Iout-(Amps)

	Ripple vs Output Current
	100
	80
(mV)-	60						Vin
Ripple	40						5 .5V
							5 .0V
	20						4 .5V
	0
	0	0.5	1	1.5	2	2.5	3

Iout-(Amps)

	Thermal Derating (Ta)	(See Note 2)
3
				85°C

(Amps)-	2.5
	1.5
	2
Iout	1

0.5

0

4.5

4 .7 5

5

5 .2 5

5.5

Vin-(Volts)

Power Dissipation vs Output Current

	3.0
	2.5						Vin
(Watts)-	2.0						5.5V
							4.5V
	1.5						5.0V
PD	1.0
	0.5
	0.0
	0.0	0.5	1.0	1.5	2.0	2.5	3.0

	Ripple vs Output Current
	10 0
	8 0						Vin
-(mV)	6 0						5.5V
							5.0V
Ripple	4 0						4.5V
	2 0
	0
	0	0.5	1	1.5	2	2.5	3

Iout-(Amps)

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

Vin-(Volts)

Power Dissipation vs Output Current

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

	Efficiency vs Output Current
	100
	90
							V in
%	80
-							4.5V
Efficiency
	60						5.0V
	70
							5.5V
	50
	40
	0	0.5	1	1.5	2	2.5	3
				Iout-(Amps)
	Ripple vs Output Current
	100
	80						Vin
(mV)	60						5.5V
							5.0V
-
Ripple	40						4.5V
	20
	0
	0	0.5	1	1.5	2	2.5	3
				Iout-(Amps)

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

Vin-(Volts)

Power Dissipation vs Output Current

	2.5
	2						Vin
(Watts)-	1.5						5.5V
	1						4.5V
							5.0V
PD
	0.5
	0
	0	0.5	1	1.5	2	2.5	3

Iout-(Amps)

Iout-(Amps)

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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