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

PT5810 Series

20-A 3.3-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 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 optimum

output voltage accuracy this pin should always be con-

nected 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 that is 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 to a

value within the range of ±10 % of nominal. The adjust-

ment method uses an external resistor. The resistor is

in order to adjust the output up or down, respectively.

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

SLTS174 - JANUARY 2003 - REVISED APRIL 2003

50

60

70

80

90

100

0

4

8

121620

Iout - Amps

PT5812

PT5813

PT5814

PT5815

PT5816

0

1

2

3

4

5

6

04

8

12

16

20

Iout - Amps

20

30

40

50

60

70

80

90

0

4

8

12

16

20

Iout (A)

200LFM

120LFM

60LFM

Nat Conv

Airflow

0

10

20

30

40

50

60

0

5

10

15

20

Iout - Amps

PT5814

PT5812

PT5813

PT5816

PT5815