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

For assistance or to order, call [phone]

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

24

Application Notes

Mechanical Outline

Product Selector Guide

Revised 5/15/98

PT6400

Standard Application

C1 = Required 100µF electrolytic
C2 = Required 100µF electrolytic

Ordering Information

PT6404¨ = +1.5 Volts
PT6405¨ = +3.3 Volts
PT6406¨ = +1.8 Volts
PT6407¨ = +2.1 Volts
PT6408¨ = +1.2 Volts
PT6409¨ = +2.5 Volts

PT Series Suffix

(PT1234X)

Case/Pin
Configuration

Vertical Through-Hole

P

Horizontal Through-Hole

D

Horizontal Surface Mount

E

Pin Function

1 Do not connect
2V

in

3V

in

4V

in

5 GND
6 GND
7 GND
8 GND
9V

out

10 V

out

11 V

out

12 V

out

Adjust

• 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.

3 AMP ADJUSTABLE
INTEGRATED SWITCHING REGULATOR

PT6400 Series

Pin-Out Information

Note: Back surface
of product is
conducting metal.

Specifications

Characteristics

PT6400 SERIES

(Ta = 25°C unless noted) Symbols Conditions Min Typ Max Units

Output Current I

o

4.5V ≤ V

in

≤ 5.5V 0.1* — 3.0 A

Current Limit I

cl

V

in

= +5V — 3.6 5.0 A

Input Voltage Range V

in

0.1A ≤ I

o

≤ 3.0A 4.5 — 5.5 V

Output Voltage Tolerance ∆V

o

V

in

= +5V, Io = 3.0A

V

o-0.05 — Vo+0.05 V

0°C ≤ Ta ≤ +70°C

Line Regulation Reg

line

4.5V ≤ V

in

≤ 5.5V, I

o

= 3.0A — ±10 ±25 mV

Load Regulation Reg

load

Vin = +5V, 0.3 ≤ I

o

≤ 3.0A — ±10 ±25 mV

Vo Ripple/Noise V

n

V

in

= 5V, Io = 3.0A — 66 165 mV

Transient Response t

tr

Io step between 1.5A and 3.0A — 200 — µSec

with C2 = 100µF V

os

Vo over/undershoot — 200 — mV

Efficiency η V

in

= +5V, Io = 1.5A Vo= 3.3V — 85 — %

V

o= 1.8V — 74 — %

V

o= 2.1V — 77 — %

Vo= 1.2V — 63 — %

Switching Frequency ƒ

o

4.5V ≤ V

in

≤ 5.5V

500 650 800 kHz

0.3A ≤ I

o

≤ 3.0A

Absolute Maximum T

a

0—+85°C

Operating Temperature Range
Recommended Operating T

a

Free Air Convection (40-60 LFM)

0 — + 70** °C

Temperature Range At Vin= 5V, Io=2.5A

Thermal Resistance θ

ja

Free Air Convection (40-60 LFM) — 25 — °C/W

Storage Temperature T

s

— -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,

20-2000 Hz, Soldered in a PC board

—15—G’s

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.

Pkg Style 300

PT6400

C2

100µF

+

COM

V

OUT

2,3,4

5,6,7,8

9,10,11

12

C1

100µF

+

V

IN

COM

R1

(VOUP)

R2

(VODOWN)

For assistance or to order, call [phone]

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

www.powertrends.com

25

5V to 3.x Converters

5V Bus Products

DATA SHEETS

CHARACTERISTIC DATA

0

0.5

1

1.5

2

2.5

3

4.5 4.75 5 5.25 5.5

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

Ripple vs Output Current

Thermal Derating (Ta) (See Note 2)

Power Dissipation vs Output Current

Efficiency - %Ripple-(mV)Iout-(Amps)PD-(Watts)

Efficiency - %

Efficiency - %

Ripple-(mV)

Ripple-(mV)Iout-(Amps)

Iout-(Amps)

PD-(Watts)

PD-(Watts)

Iout-(Amps)

Iout-(Amps)

Iout-(Amps)

Iout-(Amps)

Iout-(Amps)

Iout-(Amps)

Iout-(Amps) Iout-(Amps) Iout-(Amps)

Vin-(Volts) Vin-(Volts)Vin-(Volts)

40

50

60

70

80

90

100

0.0 0.5 1.0 1.5 2.0 2.5 3.0

4.5V

5.0V

5.5V

Vin

40

50

60

70

80

90

100

0 0.5 1 1.5 2 2.5 3

4.5V

5.0V

5.5V

Vin

40

50

60

70

80

90

100

00.511.522.53

4.5V

5.0V

5.5V

Vin

0

0.5

1

1.5

2

2.5

3

4.5 4.75 5 5.25 5.5

85°C

85°C

0.0

0.5

1.0

1.5

2.0

2.5

3.0

0.0 0.5 1.0 1.5 2.0 2.5 3.0

5.5V

5.0V

4.5V

Vin

0

0.5

1

1.5

2

2.5

0 0.5 1 1.5 2 2.5 3

5.5V

5.0V

4.5V

Vin

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.)

0

0.5

1

1.5

2

2.5

00.511.522.53

5.5V

5.0V

4.5V

Vin

PT6400 Series

0

20

40

60

80

100

0 0.5 1 1.5 2 2 .5 3

5.5V

5.0V

4.5V

Vin

0

20

40

60

80

100

00.511.522.53

5.5V

5.0V

4.5V

Vin

0

20

40

60

80

100

00.511.522.53

5.5V

5.0V

4.5V

Vin

0

0.5

1

1.5

2

2.5

3

4.5 4.75 5 5.25 5.5

85°C

Efficiency vs Output CurrentEfficiency vs Output Current

Ripple vs Output Current Ripple vs Output Current

Thermal Derating (Ta) (See Note 2) Thermal Derating (Ta) (See Note 2)

Power Dissipation vs Output Current Power Dissipation vs Output Current