For assistance or to order, call

(800) 531-5782

Power Trends, Inc.

27715 Diehl Road, Warrenville, IL 60555

(800) 531-5782

Fax: (630) 393-6902 http://www.powertrends.com

Revised 6/30/98

Standard Application

C1 = Optional 1µF ceramic
C2

= Required 100µF electrolytic

Pin-Out Information

Function

GND

out

Ordering Information

78ST1 C

= 3.3 Volts

= 3.6 Volts

= 5.0 Volts

= 5.1 Volts

= 6.5 Volts

= 7.0 Volts

= 8.0 Volts

= 9.0 Volts

= 12.0 Volts

Package Suffix

= Vertical Mount

= Surface Mount

= Horizontal

Mount

1.5 AMP POSITIVE STEP-DOWN
INTEGRATED SWITCHING REGULATOR

Very Small Footprint

High Efficiency > 85%

Self-Contained Inductor

Internal Short-Circuit Protection

Over-Temperature Protection

Fast Transient Response

Wide Input Range

The 78ST100 is a series of wide input

voltage, 3-terminal Integrated Switching
Regulators (ISRs). These ISRs have a maxi-
mum output current of 1.5A and an output
voltage that is laser trimmed to a variety of
industry standard voltages.

These 78 series regulators have excellent

line and load regulation with internal short-
circuit and over-temperature protection, are
very flexible, and may be used in a wide
variety of applications.

7 8 S T 1 0 0

S e r i e s

Output Voltage

Specifications

Characteristics

78ST100 SERIES

= 25°C unless noted)

Symbols

Conditions

Min

Typ

Max

Units

Output Current

Over V

range

0.1*

1.5

Short Circuit Current

= V

min

3.5

Apk

Input Voltage Range

0.1

1.5A

= 3.3V

= 5V

= 12V

14.5

Output Voltage Tolerance

Over V

range, I

=1.5A

±1.0

±2.0

%Vo

= 0°C to +60°C

Line Regulation

Reg

line

Over V

range

±0.2

±0.4

%Vo

Load Regulation

Reg

load

0.1

1.5A

±0.1

±0.2

%Vo

Ripple/Noise

= 9V, I

= 1.5A

= 5V

= 16V, I

= 1.5A

= 12V

Transient Response

50% load change

100

µSec

(with 100µF output cap)

over/undershoot

%Vo

Efficiency

= 10V, I

= 1A

= 3.3V

= 10V, I

= 1A

= 5V

= 17V, I

= 1A

= 12V

Switching Frequency

Over V

range, I

=1.5A

600

650

700

kHz

Absolute Maximum

-40

+85

°C

Operating Temperature Range

Recommended Operating

Free Air Convection, (40-60LFM)

Temperature Range

At V

= 24V, I

=1.0A

-40

+80**

Thermal Resistance

Free Air Convection, (40-60LFM)

°C/W

Storage Temperature

-40

+125

°C

Mechanical Shock

Per Mil-STD-883D, Method 2002.3

500

G's

Mechanical Vibration

Per Mil-STD-883D, Method 2007.2,

G's

20-2000 Hz, soldered in a PC board

Weight

6.5

grams

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

**See Thermal Derating chart.

Note: The 78ST100 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.

78ST100

Vout

GND

Vin

Pkg Style 500

For assistance or to order, call

(800) 531-5782

Power Trends, Inc.

27715 Diehl Road, Warrenville, IL 60555

(800) 531-5782

Fax: (630) 393-6902 http://www.powertrends.com

SHEETS

C H A R A C T E R I S T I C D A T A

0.2

0.4

0.6

0.8

1.2

1.4

1.6

0.2

0.4

0.6

0.8

1.2

1.4

1.6

0.2

0.4

0.6

0.8

1.2

1.4

1.6

1 6

1 9

2 2

2 5

2 8

3 1

3 4

3 7

4 0

78ST133_ 3.3 VDC

(See Note 1)

78ST105_ 5.0 VDC

(See Note 1)

78ST112_ 12.0 VDC

(See Note 1)

Efficiency vs Output Current

Ripple vs Output Current

Thermal Derating (T

)

(See Note 2)

Power Dissipation vs Output Current

Efficiency (%)

Ripple (mV)

Iout (A)

Pd (W

atts)

Efficiency (%)

Ripple (mV)

Iout (A)

Pd (W

atts)

Pd (W

atts)

Iout (A)

Vin (Volts)

85°C

60°C

70°C

85°C

70°C

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.)

60°C

70°C

7 8 S T 1 0 0

S e r i e s

Efficiency vs Output Current

Ripple vs Output Current

Thermal Derating (T

)

(See Note 2)

Thermal Derating (T

)

(See Note 2)

Power Dissipation vs Output Current

100

0.0

0.5

1.0

1.5

7.0V

10.0V

15.0V

20.0V

25.0V

30.0V

Vin

0.0

0.5

1.0

1.5

7.0V

10.0V

15.0V

20.0V

25.0V

30.0V

Vin

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.0

0.5

1.0

1.5

7.0V

10.0V

15.0V

20.0V

25.0V

30.0V

Vin

100

0.0

0.5

1.0

1.5

7.0V

10.0V

15.0V

20.0V

25.0V

30.0V

Vin

0.0

0.5

1.0

1.5

7.0V

10.0V

15.0V

20.0V

25.0V

30.0V

Vin

60°C

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.0

0.5

1.0

1.5

7.0V

10.0V

15.0V

20.0V

25.0V

30.0V

Vin

100

0.0

0.5

1.0

1.5

14.0V

20.0V

25.0V

30.0V

35.0V

Vin

100

120

140

0.0

0.5

1.0

1.5

14.0V

20.0V

25.0V

30.0V

35.0V

Vin

0.0

0.5

1.0

1.5

2.0

2.5

0.0

0.5

1.0

1.5

14.0V

20.0V

25.0V

30.0V

35.0V

Vin

PACKAGING INFORMATION

Orderable Device

Status

(1)

Package

Type

Package

Drawing

Pins Package

Qty

Eco Plan

(2)

Lead/Ball Finish

MSL Peak Temp

(3)

78ST105HC

NRND

SIP MOD

ULE

EFA

TBD

Call TI

Level-1-215C-UNLIM

78ST105SC

NRND

SIP MOD

ULE

EFC

TBD

Call TI

Level-1-215C-UNLIM

78ST105SCT

OBSOLETE SIP MOD

ULE

EFC

TBD

Call TI

78ST105VC

NRND

SIP MOD

ULE

EFD

TBD

Call TI

Level-1-215C-UNLIM

78ST107HC

OBSOLETE SIP MOD

ULE

EFA

TBD

Call TI

78ST107SC

OBSOLETE SIP MOD

ULE

EFC

TBD

Call TI

78ST107SCT

OBSOLETE SIP MOD

ULE

EFC

TBD

Call TI

78ST107VC

OBSOLETE SIP MOD

ULE

EFD

TBD

Call TI

78ST108HC

OBSOLETE SIP MOD

ULE

EFA

TBD

Call TI

78ST108SC

OBSOLETE SIP MOD

ULE

EFC

TBD

Call TI

78ST108SCT

OBSOLETE SIP MOD

ULE

EFC

TBD

Call TI

78ST108VC

OBSOLETE SIP MOD

ULE

EFD

TBD

Call TI

78ST109HC

NRND

SIP MOD

ULE

EFA

TBD

Call TI

Level-1-215C-UNLIM

78ST109SC

NRND

SIP MOD

ULE

EFC

TBD

Call TI

78ST109SCT

OBSOLETE SIP MOD

ULE

EFC

TBD

Call TI

78ST109TC

OBSOLETE SIP MOD

ULE

EFT

TBD

Call TI

78ST109VC

NRND

SIP MOD

ULE

EFD

TBD

Call TI

Level-1-215C-UNLIM

78ST112HC

NRND

SIP MOD

ULE

EFA

TBD

Call TI

Level-1-215C-UNLIM

78ST112SC

NRND

SIP MOD

ULE

EFC

TBD

Call TI

Level-1-215C-UNLIM

78ST112SCT

OBSOLETE SIP MOD

ULE

EFC

TBD

Call TI

78ST112TC

NRND

SIP MOD

ULE

EFT

TBD

Call TI

Level-1-215C-UNLIM

78ST112VC

NRND

SIP MOD

ULE

EFD

TBD

Call TI

Level-1-215C-UNLIM

78ST133HC

NRND

SIP MOD

ULE

EFA

TBD

Call TI

Level-1-215C-UNLIM

78ST133SC

NRND

SIP MOD

ULE

EFC

TBD

Call TI

Level-1-215C-UNLIM

78ST133SCT

OBSOLETE SIP MOD

ULE

EFC

TBD

Call TI

PACKAGE OPTION ADDENDUM

www.ti.com

13-May-2005

Addendum-Page 1

Orderable Device

Status

(1)

Package

Type

Package

Drawing

Pins Package

Qty

Eco Plan

(2)

Lead/Ball Finish

MSL Peak Temp

(3)

78ST133VC

NRND

SIP MOD

ULE

EFD

TBD

Call TI

Level-1-215C-UNLIM

78ST136HC

NRND

SIP MOD

ULE

EFA

TBD

Call TI

Level-1-215C-UNLIM

78ST136SC

OBSOLETE SIP MOD

ULE

EFC

TBD

Call TI

78ST136SCT

OBSOLETE SIP MOD

ULE

EFC

TBD

Call TI

78ST136VC

OBSOLETE SIP MOD

ULE

EFD

TBD

Call TI

78ST151HC

OBSOLETE SIP MOD

ULE

EFA

TBD

Call TI

78ST151SC

OBSOLETE SIP MOD

ULE

EFC

TBD

Call TI

78ST151SCT

OBSOLETE SIP MOD

ULE

EFC

TBD

Call TI

78ST151VC

OBSOLETE SIP MOD

ULE

EFD

TBD

Call TI

78ST165HC

NRND

SIP MOD

ULE

EFA

TBD

Call TI

Level-1-215C-UNLIM

78ST165SC

NRND

SIP MOD

ULE

EFC

TBD

Call TI

Level-1-215C-UNLIM

78ST165SCT

OBSOLETE SIP MOD

ULE

EFC

TBD

Call TI

78ST165VC

NRND

SIP MOD

ULE

EFD

TBD

Call TI

(1)

The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.

(2)

Eco

Plan

The

planned

eco-friendly

classification:

Pb-Free

(RoHS)

Green

(RoHS

Sb/Br)

please

check

http://www.ti.com/productcontent

for the latest availability information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)

(3)

MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder

temperature.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI

PACKAGE OPTION ADDENDUM

www.ti.com

13-May-2005

Addendum-Page 2

IMPORTANT NOTICE

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Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: 78ST107SCT

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: 78ST107SCT