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PTB48580B

Dual Complementary-Output

DC/DC Converter for DSL

SLTS240 DECEMBER 2004

PTB48580B

Characteristic

Symbol

Conditions

Min

Typ

Max

Units

Output Power

P

O

Total output power from ±V

O

0—

W

Output Current

|±I

0

—

A

Output Load Imbalance

|+I

0

—

A

Output Voltage

|±V

Inlcudes set-point, line,

|+I

12

V

–40

≤T

Temperature Variation

∆Reg

temp

–40

≤T

±V

O

—±1

—%V

O

Line Regulation

∆Reg

line

—

±0.1

±0.5

Load Regulation

∆Reg

load

Over ±I

±V

O

—

±0.1

±1

%V

O

Efficiency

η

—

88

—

%

V

±Vr

20 MHz bandwidth,

—

50

mV

pp

Transient Response

—

30

—

µs

∆V

|±V

—

±1

—

Over Current Threshold

1.4

1.9

2.4

A

reset followed by auto-recovery

Short Circuit Current

Continuous over-current trip,

|±I

—3

—A

|+I

Duty

—

10

—

%

Output Voltage Adjust Range

|±V

|+V

6.5

—

V

Switching Frequency

ƒ

S

Over V

440

520

kHz

Under-Voltage Lockout

—

33

—

V

—

32

—

On/Off Enable (pin 3)

Referenced to –V

Input High Voltage

+3.6

—

V

Input Low Voltage

–0.2

—

+0.8

Input Low Current

I

IL

——–1

mA

Standby Input Current

pin 3 open circuit

—

2

—

mA

Start-up Time

t

ON

|±I

—10

—ms

Internal Input Capacitance

—2

—µF

External Output Capacitance

C

O

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