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

Note A:

Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the ISR.

Note B:

SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures.

Efficiency vs Output Current

Power Dissipation vs Output Current

Output Ripple vs Output Current

PT5800 Series

18-A 5-V Input Adjustable

Integrated Switching Regulator

Pin Descriptions

Vin:

The positive supply voltage input for the module

with respect to the common ground (GND).

Vout:

This is the regulated output voltage from the mod-

ule with respect to the common ground (GND).

GND:

The common ground node to which the input,

output, and external control signals are referenced.

Sense(–):

Provides the regulator with the ability to sense

the set-point voltage directly across the load. For opti-

mum output voltage accuracy this pin should always be

connected to GND, even for applications that demand a

relatively light load.

Sense(+):

When used with Sense(–), the regulation circuitry

will compensate for voltage drop between the converter

and the load. The pin may be left open circuit, but con-

Inhibit*:

This is an open-collector (open-drain) negative

logic input, referenced to GND. Pulling this pin to

GND disables the module’s output voltage. If Inhibit* is

left open circuit, the output will be active whenever a

valid input source is applied.

This pin is used to trim the output voltage

over a typical range of ±15% of nominal. The adjust-

ment method uses an external resistor. The resistor is

in order to adjust the output either up or down, respec-

tively. Consult the related application note for the adjust

limits of a specific part.

Margin Dn*:

When this open-collector (open-drain) input

is asserted to GND, the output voltage is automatically

decreased by 5% from the nominal. This feature is used in

applications where the load circuit must be tested for

operation at the extreme values of its supply voltage

tolerance.

Margin Up*:

This is an open-collector (open-drain) input.

When this is asserted to GND, the output voltage is

automatically increased by 5% from the nominal.

Typical Characteristics

50

60

70

80

90

100

0

3

6

9

12

15

18

Iout (A)

PT5801

PT5802

PT5803

PT5804

PT5805

PT5806

0

10

20

30

40

50

0369

12

15

18

Iout (A)

PT5802

PT5801

PT5803

PT5804

PT5805

PT5806

0

1

2

3

4

5

6

0369

12

15

18

Iout (A)

20

30

40

50

60

70

80

90

0369

12

15

18

Iout (A)

200LFM

120LFM

60LFM

Nat conv

Airflow

SLTS171A JANUARY 2003 - REVISED - MARCH 2003