Texas Instruments PT6302A, PT6302B, PT6302C, PT6302G, PT6302N Datasheet

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P T 6 3 0 0 S e r i e s

Application Notes

Mechanical Outline

Product Selector Guide

	3 AMP ADJUSTABLE POSITIVE STEP-DOWN	Revised 5/15/98
	INTEGRATED SWITCHING REGULATORS

•90% Efficiency

•Adjustable Output Voltage

•Internal Short Circuit Protection

•Over-Temperature Protection

•On/Off Control (Ground Off)

•Small SIP Footprint

•Wide Input Range

The PT6300 Series is a line of High-Performance 3 Amp, 12-Pin SIP (Single In-line Package) Integrated

Switching Regulators (ISRs) designed to meet the on-board power conversion needs of battery powered or other equipment requiring high efficiency and small size. This high performance ISR family offers a unique combination of features combining 90% typical efficiency with open-collector on/off control and adjustable output voltage.

Quiescent current in the shutdown mode is typically less than 100µA.

	Pin-Out Information			Ordering Information	PT Series Suffix (PT1234X)
	Pin	Function		PT6302¨ = +5 Volts	Case/Pin
	1	Inhibit		PT6303¨ = +3.3 Volts	Configuration
		(30V max)			Vertical Through-Hole	N
				PT6304¨ = +12 Volts
Standard Application	2	Vin
					Horizontal Through-Hole	A

VOADJ
		12
VIN	2,3,4	PT6300	9,10,11	VOUT
	1
C1		5,6,7,8	C2	+
INH	Q1
COM				COM

3	Vin		Horizontal Surface Mount	C

4Vin

5GND

6	GND	Pkg Style 200
7	GND
8	GND
9	Vout

C1 = Optional 1µF ceramic

10

Vout

C2 = Required 100µF electrolytic

11

Vout

Q1 = NFET

12

Vout Adj

Specifications

Characteristics

PT6300 SERIES

(Ta=25°C unless noted)

Symbols

Conditions

Min

Typ

Max

Units

Output Current

Io

Over Vin range

0.1*

—

3.0

A

Short Circuit Current

Isc

Vin = Vo + 5V

—

5.0

—

Apk

Input Voltage Range

Vin

0.1 ≤ Io ≤ 3.0 A

Vo = 3.3V

9

—

26

V

(Note: inhibit function cannot

Vo = 5V

9

—

30/38**

V

be used above 30V.)

Vo = 12V

16

—

30/38**

V

Output Voltage Tolerance

Vo

Over Vin Range, Io = 3.0 A

—

±1.0

±2.0

%Vo

Ta = 0°C to +60°C

Line Regulation

Regline

Over Vin range

—

±0.25

±0.5

%Vo

Load Regulation

Regload

0.1 ≤ Io ≤ 3.0 A

—

±0.25

±0.5

%Vo

Vo Ripple/Noise

Vn

Vin = Vin min, Io = 3.0

A

—

±2

—

%Vo

Transient Response

ttr

50% load change

—

100

200

µSec

with Co = 100µF

Vos

Vo over/undershoot

—

5.0

—

%Vo

Efficiency

η

Vin=9V, Io = 0.5 A, Vo = 3.3V

—

84

—

%

Vin=9V, Io = 0.5 A, Vo = 5V

—

89

—

%

Vin=16V, Io = 0.5 A, Vo = 12V

—

91

—

%

Switching Frequency

ƒo

Over Vin and Io ranges,Vo = 3.3V/5V

400

500

600

kHz

Vo = 12V

600

750

900

kHz

Shutdown Current

Isc

Vin = 15V

—

100

—

µA

Quiescent Current

Inl

Io = 0A, Vin =10V

—

10

—

mA

Output Voltage

Vo

Below Vo

See Application Notes.

Adjustment Range

Above Vo

Absolute Maximum

Ta

-40

—

+85

°C

Operating Temperature Range

Recommendated Operating

Ta

Free Air Convection, (40-60LFM)

-40

—

+80***

°C

Temperature Range

At Vin = 24V, Io = 2.5A

Thermal Resistance

θja

Free Air Convection (40-60LFM)

—

30

—

°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,

—

10

—

G’s

20-2000 Hz,Soldered in a PC board

Weight

—

—

—

6.5

—

grams

*ISR will operate to no load with reduced specifications.

**Input voltage cannot exceed 30V when the inhibit function is used. *** See Thermal Derating chart.

Note: The PT6300 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.

10	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 3 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

PT6303, 3.3 VDC (See Note 1)

PT6302, 5.0 VDC (See Note 1)

PT6304, 12.0 VDC (See Note 1)

Efficiency vs Output Current

Efficiency vs Output Current

	100								100
	90								90
%								%-
							Vin
Efficiency-	80						9.0V	Efficiency
									80
							12.0V
	70						15.0V
							20.0V
									70
							26.0V
	60
	50								60
	40								50
	0	0.5	1	1.5	2	2.5	3
									40
									0	0.5	1	1.5	2	2.5	3

Iout-(Amps)

Iout-(Amps)

		Efficiency vs Output Current
		100
		90
Vin	- %							Vin
	Efficiency	80
24.0V								30.0V
9.0V								16.0V
12.0V								20.0V
15.0V		70						24.0V
30.0V								38.0V
38.0V		60
		50
		40
		0	0.5	1	1.5	2	2.5	3

Iout-(Amps)

Ripple vs Output Current

Ripple vs Output Current

	160
	140
(mV)	120
	100
-
Ripple	80
	60
	40
	20
	0
	0	0.5	1	1.5	2	2.5	3

			180
			160
	V		140						Vin
		(mV)
Vin			120						38.0V
									30.0V
26.0V
									24.0V
		-	100
20.0V		Ripple							15.0V
15.0V			80						12.0V
12.0V									9.0V
9.0V			60
			40
			20
			0
			0	0.5	1	1.5	2	2.5	3

Iout-(Amps)

Iout-(Amps)

	Ripple vs Output Current
	350
	300
	250						Vin
(mV)							38.0V
	200						24.0V
							30.0V
-							20.0V
Ripple	100
	150
							16.0V
	50
	0
	0	0.5	1	1.5	2	2.5	3

Iout-(Amps)

Thermal Derating (Ta)

(See Note 2)

	3								60°C
								70°C
	2.5
Iout-(Amps)	2			85°C
	1.5
	1
	0.5
	0
	9	11	13	15	17	19	21	23	25	27

Vin-(Volts)

Thermal Derating (Ta)

(See Note 2)

	3
								50°C
	2.5						60°C
-(Amps)	2							70°C
						85°C
	1.5
Iout	1
	0.5
	0
	9	13	17	21	25	29	33	37

Vin-(Volts)

Thermal Derating (Ta)

(See Note 2)

	3
								40°C
	2.5						50°C
						60°C
-(Amps)	2
					70°C
	1.5
Iout	1
	0.5
	0
	16	19	22	25	28	31	34	37

Vin-(Volts)

Power Dissipation vs Output Current

	3.5
	3
	2.5						Vin
(Watts)	1.5						26.0V
							12.0V
	2						20.0V
							15.0V
-							9.0V
PD
	1
	0.5
	0
	0	0.5	1	1.5	2	2.5	3

Iout-(Amps)

Power Dissipation vs Output Current

	3.5
	3
	2.5						Vin
(Watts)
							15.0V
							38.0V
	2						30.0V
							24.0V
-	1.5						12.0V
PD
							9.0V
	1
	0.5
	0
	0	0.5	1	1.5	2	2.5	3

Iout-(Amps)

Power Dissipation vs Output Current

	4.5
	4
	3.5
(Watts)	3						Vin
							24.0V
							38.0V
	2.5						30.0V
-
PD	2						20.0V
	1.5						16.0V
	1
	0.5
	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 note.)

Input Wide	A T A D
Products Range	S T E E H S

				11
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555	[phone]	Fax: [phone]	http://www.powertrends.com