Datasheet 78ST233VC, 78ST233SC, 78ST233HC, 78ST205VC, 78ST205SC Datasheet (Texas Instruments)

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78ST200 Series

2 AMP POSITIVE STEP-DOWN
INTEGRATED SWITCHING REGULATOR

Revised 6/30/98

Standard Application

Vin

C1

1

78ST200

2

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

• High Efficiency > 82%

• Wide Input Range

• Self-Contained Inductor

• Short-Circuit Protection

• Over-Temperature Protection

• Fast Transient Response

The 78ST200 is a series of wide
input voltage, 3 terminal Integrated
Switching Regulators (ISRs). Employ­ing a ceramic substrate, these ISRs
have a maximum output current of 2A.
The output voltage is laser trimmed
for high accuracy.

The 78ST200 series regulators
have internal short-circuit and over­temperature protection and may be
used in a wide variety of applications.

Pin-Out Information

Pin No. Function

1V

in

2 GND
3V

out

C2

Vout

+

GNDGND

3

Ordering Information

78ST2 C

Output Voltage

33 = 3.3 Volts
35 = 3.45 Volts
05 = 5.0 Volts

(For dimensions and PC board
layout see Package Style 500.)

Y

XX

Package Suffix

V = Vertical Mount
S = Surface Mount
H = Horizontal

Mount

Specifications

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

Output Current I
Input Voltage Range V

Output Voltage Tolerance ∆V

Line Regulation Reg
Load Regulation Regload 0.1 ≤ Io ≤ 2.0A — ±0.2 ±0.4 %V
Ripple/Noise V
Transient Response t

(with 100µF output cap) Vo over/undershoot 5.0 %V
Efficiency η V
Switching Frequency ƒ

Absolute Maximum T
Operating Temperature Range

Recommended Operating T
Temperature Range Over Vin and Io ranges

Thermal Resistance θ
Storage Temperature T
Mechanical Shock — Per Mil-STD-883D, Method 2002.3 — 500 — G’s
Mechanical Vibration — Per Mil-STD-883D, Method 2007.2,

Weight — — — 7 — Grams

* ISR will operate down to no load with reduced specifications.
** See Thermal Derating chart.

Note:

The 78ST200 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.

o

in

o

line

n

tr

o

a

a

ja

s

Over Vin range 0.1* — 2.0 A
Io = 0.1 to 3.0A Vo < 3.5V 7 — 15 V

Over Vin range, Io = 2.0A

Ta = 0°C to +60°C

Over Vin range — ±0.4 ±0.8 %V

Vin = V

min, I

in

50% load change — 100 — µSec

= 9V, Io = 2.0A, Vo = 5V — 82 — %

in

Over Vin and Io ranges 0.95 1.0 1.05 MHz

— -40 — +85 °C

Free Air Convection, (40-60LFM)

Free Air Convection, (40-60LFM) — 38 — °C/W
— -40 — +125 °C

20-2000 Hz, soldered in a PC board

Vo = 5.0V 8 — 20 V

= 2.0A — 1 — %Vo

o

78ST200 SERIES

— ±1.0 ±2.0 %Vo

-40 —

—5 —G’s

+85**

o

o

o

°C

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

CHARACTERISTIC DATA

For assistance or to order, call [phone]

78ST200 Series

78ST233_ 3.3 VDC

(See Note 1)

Efficiency vs Output Current

100

90

80

70

60

Efficiency (%)Ripple (mV)

50

40

0.0 0.5 1.0 1.5 2.0

Iout (A)

Ripple vs Output Current

30

25

20

15

10

5

0

0.0 0.5 1.0 1.5 2.0

Iout (A)

78ST205_ 5.0 VDC

(See Note 1)

Efficiency vs Output Current

100

90

Vin

7.0V

8.0V

10.0V

12.0V

15.0V

80

70

60

Efficiency (%)Ripple (mV)

50

40

0.0 0.5 1.0 1.5 2.0

Iout (A)

Ripple vs Output Current

30

25

Vin

7.0V

8.0V

10.0V

12.0V

15.0V

20

15

10

5

0

0.0 0.5 1.0 1.5 2.0

Iout (A)

Vin

7.5V

9.0V

12.0V

15.0V

20.0V

Vin

7.5V

9.0V

12.0V

15.0V

20.0V

Thermal Derating (Ta) (See Note 2)

2.0

1.5

1.0

Iout (A)

0.5

0.0
7 9 11 13 15

No Derating @ 85°C

Vin (Volts)

Power Dissipation vs Output Current

2.0

1.5

1.0

PD (Watts)

0.5

0.0

0.0 0.5 1.0 1.5 2.0

Iout (A)

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 Note)

Vin

7.0V

8.0V

10.0V

12.0V

15.0V

Thermal Derating (Ta) (See Note 2)

2.0

1.5

1.0

Iout (A)

0.5

0.0
8 101214161820

Vin (Volts)

70°C

85°C

Power Dissipation vs Output Current

2.0

1.5

1.0

PD Watts)

0.5

0.0

0.0 0.5 1.0 1.5 2.0

Iout (A)

Vin

7.5V

9.0V

12.0V

15.0V

20.0V

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

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