Product # PQ24018QGx25

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-2QG218D Rev. B

04/09/13

Page 4

Input:

Output:

Current:

Package:

18 - 36V

1.8V

25A

Quarter-brick

PQ24018QGx25 Electrical Characteristics

Ta = 25 °C, airflow rate = 300 LFM, Vin = 24Vdc, nominal Vout unless otherwise noted; full operating temperature range is -40 °C to +115 °C ambient

temperature with appropriate power derating. Specifications subject to change without notice.

Parameter

Min.

Typ.

Max.

Units Notes & Conditions

INPUT CHARACTERISTICS

Operating Input Voltage Range

18

24

36

V

Input Under-Voltage Lockout

Turn-On Voltage Threshold

15.5

16

16.5

V

Turn-Off Voltage Threshold

14

14.5

15

V

Lockout Hysteresis Voltage

1.0

1.5

2.0

V

Maximum Input Current

3.0

A

100% Load, 18Vin

No-Load Input Current

60

100

mA

Off Converter Input Current

1.6

3

mA

Input Reflected-Ripple Current

6

mA

P-P thru 3.3μH inductor; Figures 13 & 15

OUTPUT CHARACTERISTICS

Output Voltage Set Point

1.782

1.800

1.816

V

Output Voltage Regulation

Over Line

+0.1 (2)

+0.3 (5) % (mV)

Over Load

+0.1 (2)

+0.3 (5) % (mV)

Over Temperature

±9

±27

mV

Total Output Voltage Range

1.75

1.85

V

over sample line, load and temperature

Output Voltage Ripple and Noise

20MHz bandwidth; Figures 13 & 16

Peak-to-Peak

25

50

mV

Full Load, 1μF ceramic, 10μF tantalum

RMS

6

12

mV

Full Load, 1μF ceramic, 10μF tantalum

Operating Output Current Range

0

25

A

Output DC Current-Limit Inception

26

30

34

A

Output Voltage 10% Low; Fig 17 & 18

Short-Circuit Protection (redundant shutdown)

52

56

60

A

DYNAMIC CHARACTERISTICS

Input Voltage Ripple rejection

TBD

dB

120 Hz; Figure 20

Output Voltage Current Transient

470μF load cap, 5A/μs; Figure 12

Positive Step Change in Outpu Current

190

mV

50% lo to 75% lo

Negative Step Change in Output Current

190

mV

75% lo to 50% lo

Settling Time to within 1% Vout nominal

700

μs

Turn-On Transient

Turn-On Time

1

4

8

ms

Full load, Vout=90% nom.; Figs 9 & 10

Start-Up Inhibit Period

180

200

215

ms

-40°C to +125°C; Figure F

Maximum Output Capacitance

35,000

μF

Full load; 5% overshoot of Vout at startup

EFFICIENCY

100% Load

84

%

Figure 1

50% Load

87

%

TEMPERATURE LIMITS FOR POWER DERATING CURVES

Semiconductor Junction Temperature

125

°C

Plastic Package rated to 150°C

Board Temperature

125

°C

Board rated to 165°C

Transformer Temperature

125

°C

Figures 5 - 8

ISOLATION CHARACTERISTICS

Isolation Voltage

2000

V

Isolation Resistance

10

MΩ

Isolation Capacitance

470

pF

Technical Specifications

Electrical Characteristics