TEXAS INSTRUMENTS SLTS028B Technical data

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PT5100 Series

1-A Positive Step-down
Integrated Switching Regulator

Description

The PT5100 modules are a series of
economical, easy-to-use 1-A positive
step-down, Integrated Switching Regu­lators (ISRs). These ISRs are compatible
with most TO-220 style linear regulators,
and when employed as a linear replace­ment, provide significant benefits in
both efficiency and power dissipation.
They are recommended for use in a wide
variety of on-board power regulation
applications. These include computer,
data storage, industrial controls, and
battery powered equipment. Modules
are laser-trimmed for optimal output
voltage accuracy, and exhibit excellent
line and load regulation. The PT5100
also features output current limiting
and thermal shutdown protection.

Features

• 90%+ Efficiency

• Internal Short-Circuit Protection

• Pin-Compatible with 3-Terminal

Linear Regulators

• Laser-Trimmed Output Voltage

• Over-Temperature Protection

• Small Footprint

• Wide Input Range

• 5-Pin Mount Option

(Suffixes L & M)

Ordering Information

PT5101¨ = +5.0 Volts
PT5102¨ = +12.0 Volts
PT5103¨ = +3.3 Volts
PT5105¨ = +6.5 Volts
PT5107¨ = +15.0 Volts
PT5109¨ = +5.6 Volts
PT5110¨ = +9.0 Volts
PT5111¨ = +10.0 Volts
PT5112¨ = +8.0 Volts

PT Series Suffix

Case/Pin Order Package
Configuration Suffix Code

Vertical N (EAD)
Horizontal A (EAA)
SMD C (EAC)
Horizontal, 2-pin Tab M (EAM)
SMD, 2-Pin Tab L (EAL)

(Reference the applicable package code drawing for
the dimensions and PC board layout)

(PT1234x )

SLTS028B

(Revised 11/8/2001)

Package (EAD)

Pin-Out Information

Pin Function

1

2

3

V

in

GND

V

out

Standard Application

+V

IN

C

1

1µF

For technical support and more information, see inside back cover or visit www.ti.com

1

PT5100

2

3

C

2

100µF

+V

OUT

+

COMCOM

L
O
A
D

C1 = Optional 1µF ceramic capacitor
C2 = Required 100µF electrolytic

PT5100 Series

1-A Positive Step-down
Integrated Switching Regulator

Specifications (Unless otherwise stated, T

=25°C, Vin =Vinmin, C

a

=100µF, and Io =Iomax)

out

PT5100 SERIES

Characteristic Symbol Conditions Min Typ Max Units

Output Current I
Input Voltage Range V

o

in

Over Vin range 0.1
Over Io Range V

=3.3V 9 — 26

o

=5.0V 9 — 38 VDC

V

o

V

>5.0V V

o

Set Point Voltage Tolerance Vo tol —±1±2%V
Temperature Variation Reg
Line Regulation Reg
Load Regulation Reg
Total Output Voltage Variation ∆V

temp

line

load

tot Includes set-point, line, load,

o

Efficiency η V

Vo Ripple (pk-pk) V
Transient Response t

Current Limit I
Switching Frequency ƒ

External Output Capacitance C
Operating Temperature Range T
Thermal Resistance θ

Storage Temperature T

∆V

r

tr

tr

lim

s

out

a

ja

s

Reliability MTBF Per Bellcore TR-332

Mechanical Shock — Per Mil-Std-883D, method 2002.3, — 500 — G’s

Mechanical Vibration — Per Mil-Std-883D, Method 2007.2 — 5

Weight — Suffixes N, A, & C — 4.5 —

0° ≤Ta ≤ +60°C, I

=Iomin — ±0.5 — %V

o

Over Vin range — ±5 ±10 mV
Over Io range — ±5 ±10 mV

0° ≤Ta ≤ +60°C

= 1 5V — 95 —

o

= 1 2V — 94 —

V

o

= 1 0V — 92 — %

V

o

=5.0V — 90 —

V

o

Vo =3.3V — 82 —
20MHz bandwidth — 2 — %V
1A/µs load step, 50% to 100% Iomax — 100 200 µs
Vo over/undershoot — ±5.0 — %V
∆V

= –1% 1.2 2.6 — A

o

Over Vin range V

≥ 5.0V 500 650 800

o

V

≤ 3.3V 575 725 875

o

Over Vin range –40
Free-air convection (40-60LFM) Vo =3.3V — 45 —

=5.0V — 50 — °C/W

V

o

V

≥ 12V — 60 —

o

— –40 — +125 °C

50% stress, Ta =40°C, ground benign

1mS, half-sine, mounted to a fixture

20-2000Hz, soldered in PC board

Suffixes L & M — 6.5 —

(1)

— 1.0 A

+ 4 — 38

o

— ±1.5 ±3 %V

kHz

100 — — µF

(2)

— +85

(3)

°C

11.3 — — 10

(4)

—G’s

grams

6

o

o

o

o

o

Hrs

Flammability — Materials meet UL 94V-0

Notes: (1) The ISR will operate at no load with reduced specifications.

(2) For operation below 0°C, use a tantalum type capacitor for C
(3) See Thermal Derating curves.

.

2

(4) The tab pins on the 5-pin mount package types (suffixes L & M) must be soldered. For more information see the applicable package outline drawing.

For technical support and more information, see inside back cover or visit www.ti.com

PT5100 Series

T ypical Characteristics

1-A Positive Step-down
Integrated Switching Regulator

PT5103, 3.3 VDC (See Note A) PT5101, 5.0 VDC (See Note A) PT5102, 12.0 VDC (See Note A)

Efficiency vs Output Current Efficiency vs Output Current

100

90

80

70

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

60

50

40

0 0.2 0.4 0.6 0.8 1

Iout-(Amps)

Vin

9.0V

12.0V

18.0V

24.0V

26.0V

90

85

80

75

70

65

60

Efficiency - %

55

50

45

40

0 0.2 0.4 0.6 0.8 1

Iout-(Amps)

Ripple vs Output Current Ripple vs Output Current

60

50

40

30

20

10

0

0 0.2 0.4 0.6 0.8 1

Iout-(Amps)

Vin

26.0V

24.0V

18.0V

12.0V

9.0V

120

100

80

60

40

Ripple-(mV)

20

0

0 0.2 0.4 0.6 0.8 1

Iout-(Amps)

Thermal Derating (Ta) (See Note B) Thermal Derating (Ta) (See Note B)

1

0.8

0.6

0.4

0.2

0

7 9 11 13 15 17 19 21 23 25 27

85°C

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

70°C

1

0.8

0.6

0.4

Iout-(Amps)

0.2

0

7 1115192327313539

85°C

70°C

60°C

Efficiency vs Output Current

100

Vin

9.0V

12.0V

18.0V

24.0V

30.0V

38.0V

90

80

70

Efficiency - %

60

50

40

0 0.2 0.4 0.6 0.8 1

Vin

16.0V

20.0V

24.0V

30.0V

35.0V

38.0V

Iout-(Amps)

Ripple vs Output Current

250

Vin

38.0V

30.0V

24.0V

18.0V

12.0V

9.0V

200

150

100

Ripple-(mV)Iout-(Amps)

50

0

0 0.2 0.4 0.6 0.8 1

Vin

38.0V

35.0V

30.0V

24.0V

20.0V

16.0V

Iout-(Amps)

Thermal Derating (Ta) (See Note B)

50°C

1

0.8

0.6

0.4

0.2

0

15 17 19 21 23 25 27 29 31 33 35 37 39

70°C

85°C

50°C

60°C

Power Dissipation vs Output Current Power Dissipation vs Output Current

1.2

1

0.8

0.6

0.4

0.2

0

0 0.2 0.4 0.6 0.8 1

Vin

26.0V

24.0V

18.0V

12.0V

9.0V

1.8

1.6

1.4

1.2

1

0.8

PD-(Watts)

0.6

0.4

0.2

0

0 0.2 0.4 0.6 0.8 1

Vin

38.0V

30.0V

24.0V

18.0V

12.0V

9.0V

Power Dissipation vs Output Current

2.4

2

1.6

1.2

PD-(Watts)

0.8

0.4

0

0 0.2 0.4 0.6 0.8 1

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

Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter.
Note B: Thermal derating graphs are developed in free-air convection cooling, which corresponds to approximately 40–60LFM of airflow.

For technical support and more information, see inside back cover or visit www.ti.com

Vin

38.0V

35.0V

30.0V

24.0V

20.0V

16.0V