Texas Instruments PT6502A, PT6502B, PT6502C, PT6502G, PT6502N Datasheet

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P T 6 5 0 0 S e r i e s

Revised 7/15/98

Application Notes

8 AMP ADJUSTABLE ISR

WITH SHORT-CIRCUIT PROTECTION Mechanical Outline

Product Selector Guide

•8A Single Device Power

•Up to 90% efficiency (PT6501)

•Small SIP Footprint

•Standby Function

•Internal Short Circuit Protection

•Over-Temperature Protection

•Adjustable Output Voltage

The PT6500 series is Power Trends’ new high performance +3.1 to 6V input, 8 Amp, 14-Pin SIP (Single In- line-Package) Integrated Switching Regulator (ISR). This high-perfor-

mance ISR allows easy integration of high-speed, low-voltage Pentium processors and their support logic into existing 3.3V or 5V systems without redesigning the central power supply. The high-performance PT6502 solves the problem of providing the low terminating voltages required by BTL/ Futurebus+, CTT, HP, and GTL Buses from existing 3.3V or 5V power rails without redesigning the central power supply.

Pin-Out Information Ordering Information

PT Series Suffix (PT1234X)

Standard Application

VO Adjust

14

VIN	4,5,6		11,12,13	VOUT
(+)			Remote Sense	(+)
		PT6501,2,3	1
C1	3		C2
	Q1	7,8,9,10
INH
COM				COM

C1 = Required 330µF electrolytic

C2 = Required 330µF electrolytic

Pin	Function	PT6501¨ = 3.3 Volts		Case/Pin	Heat Tab Configuration
1	Remote Sense	† PT6502¨ = 1.5 Volts		Configuration		None	Side
2	Do not connect	PT6503¨ = 2.5 Volts		Vertical Through-Hole		N	R
3	STBY*-Standby	PT6504¨ = 3.6	Volts	Horizontal Through-Hole		A	G
4	Vin	† PT6505¨ = 1.2 Volts		Horizontal Surface Mount		C	B
5	Vin	† PT6506¨ = 1.8	Volts
6	Vin
		† PT6507¨ = 1.3	Volts
7	GND
		† PT6508¨ = 1.7	Volts
8	GND
		†3.3V Input Bus Capable
9	GND				Pkg Style 400
10	GND
11	Vout
12	Vout
13	Vout
14	Vout Adjust

Specifications

Characteristics					PT6500 SERIES
(Ta=25°C unless noted)	Symbols	Conditions			Min	Typ	Max	Units
Output Current	Io	Over Vin range			0.1*	—	8.0	A
Current Limit	Icl	Vin=+5V			—	13.0	20.0	A
Short Circuit Current	Isc	Vin=+5V			—	15.0	—	Apk
Input Voltage Range	Vin	0.1≤ Io≤ 8.0A	Vo=2.5V and 3.3V		4.5	—	6	V
			Vo=1.5V, 1.2V, 1.3V		3.1	—	6	V
			Vo=3.6V		4.8	—	6	V
Output Voltage Tolerance	Vo	Vin = +5V, Io = 8.0A			Vo-0.1	—	Vo+0.1	V
		Ta = 0 to +70°C
Output Adjust Range	Vo	Vnom = 3.3V	Vadj = (PT6501)		2.25	—	4.20	Vinmin=3.1V
		Vnom = 1.5V	Vadj = (PT6502)		1.27	—	2.65	or Vo+1.2V
		Vnom = 2.5V	Vadj = (PT6503)		1.80	—	3.50	(whichever
		Pin 14 to Vo or GND	Vadj = (PT6504)		2.50		4.30	is greater)
Line Regulation	Regline	4.5V ≤ Vin ≤ 6.0V, Io = 8.0A		(PT6501/4)	—	±7	±17	mV
		3.1V ≤ Vin ≤ 6.0V, Io = 8.0A		(PT6502)	—	±3	±8
		4.5V ≤ Vin ≤ 6.0V, Io = 8.0A		(PT6503)		±7	±13
Load Regulation	Regload	0.1 ≤ Io ≤ 8.0A, Vin = +5V		(PT6501/4)	—	±17	±33	mV
				(PT6502)	—	±12	±23
				(PT6503)		±13	±25
Vo Ripple/Noise	Vn	Vin = +5V, Io = 8.0 Amp			—	50	—	mVpp
Transient Response	ttr	Io step from 4A to 8.0A			—	100	—	µsec
with Co = 330µF	Vos	Vo over/undershoot			—	150	—	mV
Efficiency	η	Vin = +5V, Io = 3.0A	(PT6501/6504)		—	90	—	%
				(PT6502)	—	76	—	%
				(PT6503)	—	85	—	%
		Vin = +5V, Io = 8.0A	(PT6501/6504)		—	83	—	%
				(PT6502)	—	68	—	%
				(PT6503)	—	76	—	%

* ISR will operate down to no load with reduced specifications.

Note: The PT6500 Series requires a 330µF electrolytic or tantalum input and output capacitor for proper operation in all applications.

See PT6000/7000 Series Capacitor application note.

2	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 5 0 0					S e r i e s
	Specifications (continued)
	Characteristics					PT65000 SERIES
	(Ta=25°C unless noted)	Symbols	Conditions			Min		Typ		Max	Units
	Switching Frequency	ƒo	Over Vin and Io ranges			475		600		725	KHz
	Absolute Maximum	Ta				0		—		+85	°C
	Operating Temperature Range
	Recommended Operating	Ta	Vin = +5V, Io = 6.0A			0		—		+70**	°C
	Temperature Range		Free Air Convection (40-60LFM)
	Thermal Resistance	θja	Free Air Convection (40-60LFM)			—		15		—	°C/W
	Storage Temperature	Ts	—			-40		—		+125	°C
	Mechanical Shock		Per Mil-STD-883D, Method 2002.3,			—		500		—	G’s
			1msec, half sine, fixture mounted
	Mechanical Vibration					—		7.5		—	G’s
	Weight					—		23		—	grams
	** See Thermal Derating charts.
	Note: The PT6500 Series requires a 330µF electrolytic or tantalum input and output capacitor for proper operation in all applications.
		C H A R A C T E R I S T I C			D A T A

PT6501, 3.3 VDC, Vin=5.0V

(See Note 1)

Efficiency vs Output Current

	100
	90
-%	80									Vin
										4.5V
Efficiency	60
	70									5.0V
										5.5V
										6.0V
	50
	40
	0	1	2	3		4	5	6	7	8
				Iout-(Amps)
Ripple vs Output Current
	35
	30									Vin
	25									6.0V
(mV)
	20									5.5V
-										5.0V
Ripple	15									4.5V
	10
	5
	0
	0	1	2	3	4	5	6	7	8
				Iout-(Amps)
Power Dissipation vs Output Current
	7
	6
	5									Vin
										6.0V
(Watts)-	3
										5.0V
	4									5.5V
Pd	2									4.5V
	1
	0
	0	1	2	3		4	5	6	7	8
				Iout-(Amps)

PT6502, 1.5 VDC, Vin=5.0V

(See Note 1)

Efficiency vs Output Current

	100
	90
	80								Vin
-%									3.1V
Efficiency	60								3.5V
									6.0V
	70								4.0V
									4.5V
									5.0V
	50
	40
	0	1	2	3	4	5	6	7	8
				Iout-(Amps)
Ripple vs Output Current
	50
	40								Vin
(mV)-									3.1V
									4.0V
Ripple	30								3.5V
									4.5V
	20								5.0V
									6.0V
	10
	0
	0	1	2	3	4	5	6	7	8
				Iout-(Amps)
	Power Dissipation vs Output Current
	6
	5								Vin
									6.0V
(Watts)	4								5.0V
	3								3.5V
									4.5V
									4.0V
-									3.1V
Pd	2
	1
	0
	0	1	2	3	4	5	6	7	8
				Iout-(Amps)

PT6503, 2.5 VDC, Vin=5.0V

(See Note 1)

Efficiency vs Output Current

	100
	90
									Vin
	80								4.0V
%
-									5.5V
Efficiency 60
	70								4.5V
									5.0V
	50								6.0V
	40
	0	1	2	3	4	5	6	7	8
				Iout-(Amps)
	Ripple vs Output Current
	60
	50								Vin
-(mV)	40								6.0V
	30								5.5V
Ripple									4.5V
	20
									5.0V
	10								4.0V
	0
	0	1	2	3	4	5	6	7	8
				Iout-(Amps)
	Power Dissipation vs Output Current
	7
	6								Vin
(Watts)-	5								6.0V
	3
									5.0V
	4								5.5V
Pd	2								4.5V
									4.0V
	1
	0
	0	1	2	3	4	5	6	7	8
				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.

	5V 3	D
	.	TA
	3V
	to
	x.3	A
	Bus
	Converters	STEE H S
	Products

			3
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 5 0 0 T H E R M A L D A T A

THERMAL DERATING CURVES

Air Flow (LFM) 60

PT6501 (See Note 1)

No Heat Tab

Thermal Derating (Ta)

(See Note 2)

	8		25˚C
		50˚C	35˚C
	7
			60˚C
		70˚C
	6
(Amps)-
	5	85˚C
	4
Iout	3
	2

1

0
4.5		4.75	5	5.25	5.5	5.75	6
				Vin-(Volts)

Heat Tab

Thermal Derating (Ta)																		(See Note 2)
	8																							50˚C
																			60˚C
	7						70˚C
(Amps)-	6										85˚C
	5
	4
Iout	3
	2
	1
	0
	4.5			4.75		5			5.25							5.5				5.75							6
								Vin-(Volts)
PT6502 (See Note 1)
No Heat Tab
Thermal Derating (Ta)																		(See Note 2)
	8
	7					60˚C																	50˚C
														70˚C
	6
(Amps)										85˚C
	4
-	5
Iout	3
	2
	1
	0
	3			3.5		4			4.5							5				5.5							6
							Vin-(Volts)
Heat Tab
Thermal Derating (Ta)																		(See Note 2)
	8																									50˚C
																									60˚C
	7																			70˚C
(Amps)-	6													85˚C
	4
Iout	5
	3
	2
	1
	0
	3			3.5		4			4.5							5							5.5				6
								Vin-(Volts)

200

Thermal Derating (Ta)

(See Note 2)

	8					35˚C
						50˚C
	7
				70˚C
(Amps)	6			85˚C
	5
	4
-
Iout	3
	2
	1
	0
	4.5	4.75	5	5.25	5.5	5.75	6

Vin-(Volts)

	Thermal Derating (Ta)												(See Note 2)
	8												70˚C
	7							85˚C
	6
(Amps)-	5
	3
Iout	4
	2
	1
	0
	4.5			4.75		5	5.25				5.5		5.75			6
							Vin-(Volts)

Thermal Derating (Ta)

(See Note 2)

	8		50˚C
		70˚C	60˚C
	7
	6	85˚C

(Amps)-	4
Iout	5
	3
	2
	1
	0
	3		3.5	4	4.5	5	5.5	6
					Vin-(Volts)

	Thermal Derating (Ta)											(See Note 2)
	8
													70˚C
	7							85˚C
(Amps)-	6
	4
Iout	5
	3
	2
	1
	0
	3			3.5		4	4.5				5	5.5		6
							Vin-(Volts)

300

Thermal Derating (Ta)													(See Note 2)
	8
															60˚C
	7										70˚C
	6							85˚C
(Amps)-
	5
Iout	4
	3
	2
	1
	0
	4.5			4.75		5		5.25			5.5		5.75			6
								Vin-(Volts)

	Thermal Derating (Ta)											(See Note 2)
	8											70˚C
	7									85˚C
(Amps)-	6
	5
Iout	4
	3
	2
	1
	0
	4.5			4.75		5	5.25		5.5		5.75			6
							Vin-(Volts)

	Thermal Derating (Ta)															(See Note 2)
	8														70˚C
	7								85˚C
(Amps)-	6
	4
Iout	5
	3
	2
	1
	0
	3			3.5		4		4.5					5			5.5						6
								Vin-(Volts)
	Thermal Derating (Ta)															(See Note 2)
	8
																					70˚C
	7																85˚C
	6
(Amps)-	5
	4
Iout	3
	2
	1
	0
	3			3.5		4		4.5					5			5.5						6
									Vin-(Volts)

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 different air flow rates as indicated on each graph, with or without the heat tab, soldered in a printed circuit board. (See Thermal Application Notes.)

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