Texas Instruments 78SR174VC, 78SR174SC, 78SR174HC, 78SR153VC, 78SR153SC Datasheet

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7 8 S R 1 0 0

S e r i e s

1.5 AMP POSITIVE STEP-DOWN

Revised 6/30/98

INTEGRATED SWITCHING REGULATOR

•

Very Small Footprint

The 78SR100 is a series of wide input

voltage, 3-terminal Integrated Switching

• High Efficiency > 85%

Regulators (ISRs). These ISRs have a maxi-

•

Self-Contained Inductor

mum output current of 1.5A and an output

•

Internal Short-Circuit Protection

voltage that is laser trimmed to a variety of

•

Over-Temperature Protection

industrystandardvoltages.

•

Wide Input Range

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.

Pin-Out Information

Ordering Information

Pin

Function

78SR1

XX

Y

C

1

Vin

Standard Application

2

GND

Output Voltage

Package Suffix

05 = 5.0 Volts

V = Vertical Mount

3

Vout

53 = 5.25 Volts

S = Surface Mount

Vin

1

3

Vout

06 = 6.0 Volts

H = Horizontal

78SR100

74 = 7.15 Volts

Mount

08 = 8.0 Volts

C1

C2

09 = 9.0 Volts

2

GND

GND

10 = 10.0 Volts

12 = 12.0 Volts

14 = 13.9 Volts

C1 = Optional 1µF ceramic

15 = 15.0 Volts

C2 = Optional 1µF ceramic

Specifications

Pkg Style 500

Characteristics

78SR100 SERIES

(Ta = 25°C unless noted)

Symbols

Conditions

Min

Typ

Max

Units

Output Current

Io

Over Vin range

0.1*

—

1.5

A

Short Circuit Current

Isc

Vin = Vin min

—

3.5

—

Apk

Input Voltage Range

Vin

0.1 ≤ Io ≤ 1.5A

Vo= 5V

7

—

30

V

Vo= 12V

14.5

—

30

V

Output Voltage Tolerance

Vo

Over Vin range, Io=1.5A

—

±1.0

±2.0

%Vo

Ta = 0°C to +60°C

Line Regulation

Regline

Over Vin range

—

±0.2

±0.4

%Vo

Load Regulation

Regload

0.1 ≤ Io ≤ 1.5A

—

±0.1

±0.2

%Vo

Vo Ripple/Noise

Vn

Vin= 9V, Io= 1.5A

Vo= 5V

—

50

—

mVpp

Vin= 16V, Io= 1.5A

Vo= 12V

80

mVpp

Transient Response

ttr

50% load change

—

100

—

µSec

Vo over/undershoot

—

30

—

%Vo

Efficiency

η

Vin= 10V, Io= 1A

Vo= 5V

—

85

—

%

Vin= 17V, Io= 1A

Vo= 12V

—

90

—

%

Switching Frequency

ƒo

Over Vin range, Io=1.5A

600

650

700

kHz

Absolute Maximum

Ta

—

-40

—

+85

°C

Operating Temperature Range

Recommended Operating

Ta

Free Air Convection, (40-60LFM)

-40

—

+80**

°C

Temperature Range

At Vin= 24V, Io=1.0A

Thermal Resistance

θja

Free Air Convection, (40-60LFM)

—

45

—

°C/W

Storage Temperature

Ts

—

-40

—

+125

°C

Mechanical Shock

—

Per Mil-STD-883D, Method 2002.3

—

500

—

G’s

Mechanical Vibration

—

Per Mil-STD-883D, Method 2007.2,

—

5

—

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.

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