SEP 12, 2003 revised to OCT 26, 2006

Page 3 of 8

www.power-one.com

QLS25 DC-DC Series Data Sheet

25A Quarter-Brick

Output Specifications

All specifications apply over specified input voltage, output load and temperature range, unless otherwise noted.

Parameter

Conditions/Description

Min

Nom

Max

Units

Output Voltage Setpoint Accuracy

Vin=Vin.nom, Full Load

-1

1

%Vout

Output Current*

10

100

Line Regulation

0.2

%Vout

Load Regulation

0.2

%Vout

Total output voltage regulation

Over all input voltage, load, and

temperature conditions

-2

2

%Vout

Remote Sense Headroom

0.5

VDC

Dynamic Regulation

Peak Deviation

Settling Time

50-75% load step change

to 1% error band

5

150

%Vout

μs

Admissible Load Capacitance

20,000

μF

Output Current Limit Threshold**

Vout≤0.97Vout.nom

110

140

Switching Frequency

270

kHz

Overvoltage Protection,

Non Latching

Over all input voltage and load

conditions

120

140

%Vout

Trim Range

90

110

%Vout

* At Iout<Iout.min, the output may contain low frequency component that exceeds ripple specifications.

** Overcurrent protection is non-latching with auto recovery.

Feature Specifications

All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.

Parameter

Conditions/Description

Min

Nom

Max

Units

Shutdown (ON/OFF)

Negative Logic

Converter ON

Source Current

Converter OFF

Open Circuit Voltage

Positive Logic

Converter ON

Open Circuit Voltage

Converter OFF

Source Current

On/Off signal is low – converter is ON

ON/OFF pin is connected to -Vin

ON/OFF pin is floating

On/Off signal is low–converter is OFF

ON/OFF pin is floating

ON/OFF pin is connected to -Vin

-1.0

3.5

3.5

-1.0

1.8

1

50

5

50

5

1.8

1

VDC

mADC

VDC

VDC

VDC

VDC

VDC

mADC

Overtemperature

Protection

Average board temperature

105

°C