Texas Instruments PT6101A, PT6101C, PT6101G, PT6101N, PT6102A Datasheet

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P T 6 1 0 0 S e r i e s

Application Notes

Mechanical Outline

Product Selector Guide

1 AMP ADJUSTABLE POSITIVE STEP-DOWN

Revised 5/15/98

INTEGRATED SWITCHING REGULATOR

•	90% Efficiency	The PT6100 Series is a line of High-
•	Adjustable Output Voltage	Performance 1 Amp, 12-Pin SIP (Single In-line
• Internal Short Circuit Protection		Package) Integrated Switching Regulators (ISRs)
•	Over-Temperature Protection	designed to meet the on-board power conversion
• On/Off Control (Ground Off)		needs of battery powered or other equipment
•	Small SIP Footprint	requiring high efficiency and small size. This high
• Meets Requirements for FCC		performance ISR family offers a unique
	Part 15; Class B limits for Radiated	combination of features combining 90% typical
	Emissions	efficiency with open-collector on/off control and
•	Wide Input Range	adjustable output voltage. Quiescent current in
		the shutdown mode is less than 100µA.

Standard Application

VOADJ
		12
VIN	2,3,4	PT6100	9,10,11	VOUT
	1
C1		5,6,7,8	C2	+
INH	Q1
COM				COM
		C1 = Optional 1µF ceramic
		Q1 = NFET
Specifications		C2 = Required 100µF electrolytic

	Pin-Out Information				Ordering Information	PT Series Suffix (PT1234X)
		Pin	Function		PT6101o = +5 Volts	Case/Pin
			Inhibit
		1			PT6102o = +3.3 Volts	Configuration
			(30V max)
	2		Vin		PT6103o = +12 Volts	Vertical Through-Hole	N
		3	Vin			Horizontal Through-Hole	A
		4	Vin
						Horizontal Surface Mount	C
		5	GND		Pkg Style 200
		6	GND

7GND

8GND

9Vout

10Vout

11Vout

12Vout Adj

Characteristics				PT6100 SERIES
(Ta =25°C unless noted)	Symbols	Conditions		Min	Typ	Max	Units
Output Current	Io	Over Vin range		0.1*	—	1.0	A
Short Circuit Current	Isc	Vin = Vin min		—	3.5	—	Apk
Input Voltage Range	Vin	0.1 ≤ Io ≤ 1.0 A	Vo = 3.3V	9	—	26	V
(Note: inhibit function cannot			Vo = 5V	9	—	30/38**	V
be used with Vin above 30V.)			Vo = 12V	16	—	30/38**	V
Output Voltage Tolerance	Vo	Over Vin Range, Io = 1.0 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 ≤ 1.0 A		—	±0.25	±0.5	%Vo
Vo Ripple/Noise	Vn	Vin=Vin min, Io=1.0 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=0.5A, Vo=3.3V		—	84	—	%
		Vin=9V, Io=0.5A, Vo=5V		—	89	—	%
		Vin=16V, Io=0.5A, Vo=12V		—	91	—	%
Switching Frequency	ƒo	Over Vin and Io ranges		400	500	600	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
Recommended Operating	Ta	Free Air Convection,	Vo= 3.3V	-40	—	+85***	°C
Temperature Range		(40-60LFM)	Vo= 5V	-40	—	+85***
		Vin=24V, Io=0.75A	Vo= 12V	-40	—	+80***

Thermal Resistance	θja	Free Air Convection	Vo = 3.3V
		(40-60LFM)	Vo = 5V
			Vo = 12V

—	50	—	°C/W
—	40	—
—	40	—

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	—	10	—	G’s
		20-2000 Hz, Soldered in a PC board
Weight			—	5.0	—	grams
* ISR will operate down to no load with reduced specifications.
** Input voltage cannot exceed 30V when the inhibit function is used. ***See Thermal Derating chart.
Note: The PT6100 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.

6	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 1 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

	PT6102, 3.3 VDC
	(See Note 1)
	Efficiency vs Output Current
	100
	90
- %	80					Vin
Efficiency						9.0V
	70					12.0V
						15.0V
						18.0V
	60					26.0V
	50
	40
	0	0.2	0.4	0.6	0.8	1
			Iout-(Amps)
	Ripple vs Output Current
	90
	80
(mV)	70					26.0V
						Vin
	60
-						18.0V
Ripple	50
						15.0V
	40					12.0V
						9.0V
	30
	20
	10
	0
	0	0.2	0.4	0.6	0.8	1

Iout-(Amps)

Thermal Derating (Ta)

(See Note 2)

	1
							70°C
	0.8					85°C
-(Amps)	0.6
Iout	0.4
	0.2
	0
	9	12	15	18	21	24	27

Vin-(Volts)

(n

Power Dissipation vs Output Current

	1
	0.9
	0.8
	0.7					Vin
(Watts)						26.0V
	0.6					12.0V
						18.0V
	0.5					15.0V
-	0.4
PD						9.0V
	0.3
	0.2
	0.1
	0
	0	0.2	0.4	0.6	0.8	1

Iout-(Amps)

PT6101, 5.0 VDC	PT6103, 12.0 VDC
(See Note 1)	(See Note 1)
Efficiency vs Output Current	Efficiency vs Output Current

	100		100
	90		90
	%	Vin	%
	-		-

Efficiency	80					9.0V	Efficiency	80
						38.0V							38.0V
						12.0V							20.0V
	70					18.0V							24.0V
						24.0V		70
						30.0V							30.0V
	60
								60
	50
								50
	40
	0	0.2	0.4	0.6	0.8	1		40
								0	0.2	0.4	0.6	0.8	1
				Iout-(Amps)						Iout-(Amps)

	Ripple vs Output Current
	180
	160
(mV)-	140
						38.0V
	120					Vin
Ripple	100					30.0V
						24.0V
	80					18.0V
						12.0V
	60					9.0V
	40
	20
	0
	0	0.2	0.4	0.6	0.8	1

Iout-(Amps)

Thermal Derating (Ta) (See Note 2)

1

70°C

0.8

85°C

(Amps)-	0.6
Iout	0.4

0.2

0

9

12

15

18

21

24

27

30

33

36

39

Vin-(Volts)

Power Dissipation vs Output Current

	1.4
	1.2
	1					Vin
(Watts)-						18.0V
						38.0V
	0.8					30.0V
						24.0V
PD
	0.6					12.0V
						9.0V
	0.4
	0.2
	0
	0	0.2	0.4	0.6	0.8	1

Iout-(Amps)

	Ripple vs Output Current
	400
	350
(mV)-	300
	200
	250					38.0V
Ripple						30.0V
						24.0V
	150					20.0V
						16.0V
	100
	50
	0
	0	0.2	0.4	0.6	0.8	1

Iout-(Amps)

Thermal Derating (Ta)

(See Note 2)

	1										50°C
											60°C
	0.8								70°C
-(Amps)	0.6
Iout	0.4							85°C
	0.2
	0
	16	18	20	22	24	26	28	30	32	34	36	38

Vin-(Volts)

Power Dissipation vs Output Current

	2
	1.8
	1.6
	1.4					Vin
(Watts)-
	1.2					38.0V
						30.0V
	1					24.0V
PD	0.8					20.0V
						16.0V
	0.6
	0.4
	0.2
	0
	0	0.2	0.4	0.6	0.8	1

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.)

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

			7
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555	[phone]	Fax: [phone] http://www.powertrends.com