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PTB48580A

Dual Complementary-Output

DC/DC Converter for DSL

SLTS240 DECEMBER 2004

PTB48580A

Characteristic

Symbol

Conditions

Min

Typ

Max

Units

Output Power

0—

W

Output Current

|±I

Over V

0

—

3

(2)

A

Output Load Imbalance

|+I

0

—

1

(3)

A

Output Voltage

|±V

Inlcudes set-point, line,

|+I

5

V

–40

≤T

Temperature Variation

∆Reg

temp

–40

≤T

—±1

Line Regulation

∆Reg

line

Over V

±V

O

—

±0.1

±0.4

%V

O

Load Regulation

∆Reg

load

—

±0.2

±0.4

Efficiency

η

P

—

86

—

%

±Vr

20 MHz bandwidth,

—

25

Transient Response

—

30

—

µs

∆V

|±V

—

±1

—

Over Current Threshold

3.3

4.3

5.3

A

reset followed by auto-recovery

Short Circuit Current

Continuous over-current trip,

|±I

—

6.5

—

A

|+I

Duty

—

10

—

%

Output Voltage Adjust Range

|±V

|+V

3.5

—

V

Switching Frequency

440

500

kHz

Under-Voltage Lockout

V

V

—

33

—

V

V

V

—

32

—

On/Off Enable (pin 3)

Input High Voltage

+3.6

—

V

Input Low Voltage

V

IL

–0.2

—

+0.8

Input Low Current

——–1

mA

Standby Input Current

I

pin 3 open circuit

—

2

—

mA

Start-up Time

|±I

—10

—ms

Internal Input Capacitance

C

I

—2

—µF

External Output Capacitance

Capacitance from either output to COM (pin 6)

0

—

µF

Reliability

MTBF

Per Telcordia SR-332

2.8

—

—

Notes:

(1) See Safe Operating Area curves or contact the factory for the appropriate derating.

(2) Under balanced load conditions, load current flowing out of +V

(3) A load imbalance is the difference in current flowing from +V

(4) Output voltage ripple is measured with a 10 µF tantalum capacitor connected from +V

(5) When the output voltage is adjusted higher than the nominal output voltage the load current must not exceed the module’s maximum power rating.

(6) This is the free-running frequency. The module can be made to synchronize with the PTB48500 when both modules are used together in a system.

(7) The On/Off Enable (pin 3) has an internal pull-up and may be controlled with an open-collector (or open-drain) transistor. The input is diode protected

and may be connected to +V

(8) Electrolytic capacitors with very low equivalent series resistance (ESR) may induce instability when used on the output. Consult the factory before using

capacitors with organic, or polymer-aluminum type electrolytes.

Not Recommended for New Designs