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

PT6900 Series

Standard Application

Ordering Information

+5V Input

+3.3V Input

PT6901

❏

❏

❏

❏

❏ PT6904❑

❑

❑

❑

❑ = –2.0V

PT6902

❏

❏

❏

❏

❏ PT6905❑

❑

❑

❑

❑ = –5.2V

PT6903

❑

❑

❑

❑

❑

= –1.5V

Cin = Required 330µF electrolytic

Cout = Required 330µF electrolytic

The PT6900 is a series of high-

performance ISRs, that provide plus to

minus voltage conversion, up to 12 watt

in a 23-pin SIP package.

Pin Function

1

Do not connect

8

Remote Sense GND

9

GND

10

GND

11

GND

12

GND

Pin

Function

13

GND

14

GND

15

GND

16

17

18

19

20

21

22

23

Do not connect

Pin-Out Information

The PT6900 is designed to supply

regulated negative voltages for power-

ing the latest ECL (-5.2V) and GaAs

(-2.0V) ICs used in high-speed fiber

optic communications. A 330µF elec-

trolytic capacitor is required on the

input and output for proper operation.

Please note that this product is not

short-circuit protected.

(For dimensions and PC board layout,

see Package Styles 1100 and 1110.)

Cout

Cin

PT6900

16-21

9-15

3-7

2

V

ADJ

-V

OUT

GND

GND

+V

IN

+

+

22

Remote Sense

Remote Sense

8

Case/Pin

Configuration

Vertical Through-Hole

N

Horizontal Through-Hole

A

Horizontal Surface Mount

C

SLTS041A

(Revised 6/30/2000)

Specifications

Characteristics

PT6900 SERIES

(T

Symbols

Conditions

Min

Typ

Max

Units

Output Current

= +25°C, natural convection

A

A

Input Voltage Range

0.1A

PT6901 PT6902/PT6903

4.5

—

5.5

PT6904/PT6905

3.1

—

3.6

V

Output Voltage Tolerance

—

V

0°C

Output Adjust Range

–1.4

—

–4.4

–2.7

—

–6.5

V

–1.2

—

–3.4

Line Regulation

—

±0.5

±1.0

%

Load Regulation

—

±0.5

±1.0

%

—

40

—

mV

—

50

—

Transient Response

—

200

—

µSec

—

200

—

mV

Efficiency

η

—

65

—

—

70

—

%

—

77

—

Vo = –2.0V

—

67

—

%

Vo = –5.2V

—

75

—

Switching Frequency

500

—

600

kHz

Absolute Maximum

0

—

°C

Operating Temperature Range

Storage Temperature

-40

—

+125

°C

Weight

—

Vertical/Horizontal

—

28/33

—

grams

Notes: (1) ISR-will operate down to no load with reduced specifications.

(2) See SOA curves or contact the factory for the approrpiate derating.

12 Watt 5V/3.3V Input

Plus to Minus Voltage Converter