Lineage Power

2

Data Sheet

March 27, 2008

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

QRW025 Series Power Modules; dc-dc Converters

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress

ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the

operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the

device reliabiltiy.

Electrical Specifications

Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.

CAUTION: This power module is not internally fused. An input line fuse must always be used.

This power module can be used in a wide variety of applications, ranging from simple stand-alone operation to an integrated

part of a sophisticated power architecture. To preserve maximum flexibility, internal fusing is not included; however, to achieve

maximum safety and system protection, always use an input line fuse. The safety agencies require a normal-blow fuse with a

maximum rating of 10 A (see Safety Considerations section). Based on the information provided in this data sheet on inrush

energy and maximum dc input current, the same type of fuse with a lower rating can be used. Refer to the fuse manufacturer’s

data for further information.

Parameter

Device

Symbol

Min

Max

Unit

Input Voltage:Continuous

Transient (100ms)

All

VI

VI, trans

—

—

75

100

Vdc

Vdc

Operating Ambient Temperature

(See Thermal Considerations section)

All

TA

–40

85

°C

Storage Temperature

All

Tstg

–55

125

°C

I/O Isolation Voltage (100% factory Hi-Pot tested)

When using optional case ground pin

(option 7)

—

—

—

1500

700

Vdc

Vdc

Parameter

Device

Symbol

Min

Typ

Max

Unit

Operating Input Voltage

All

VIN

36

48

75

Vdc

Maximum Input Current

(VI = 0 V to 75 V; IO = IO, max)

All

—

—

2.8m n

Adc

Inrush Transient

All

Input Reflected Ripple Current, peak-peak

(5 Hz to 20 MHz, 12 µH source impedance

See Test configuration section)

All

16

mAp-p

Input Ripple Rejection (120 Hz)

All

60

dB