ADDC02803SC datasheet(2/18 Pages) AD

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ADDC02803SC/ADDC02805SA–SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

Case

Test

ADDC02803SC

ADDC02805SA

Parameter

Temp

Level Conditions

Min Typ Max

Min

Typ

Max

Units

INPUT CHARACTERISTICS

Steady State Operating Input Voltage Range1 Full

IO = 2 A to 20 A

Abnormal Operating Input Voltage Range

(Per MIL-STD-704D)

Full

IO = 2 A to 16 A

Input Overvoltage Shutdown

+25

°C I

52.5 55

52.5

No Load Input Current

+25

°C I

Disabled Input Current

Full

0.85 2.0

0.85

2.0

OUTPUT CHARACTERISTICS

2, 3

Output Voltage (VO)

+25

°CI

IO = 2 A to 20 A, VIN = 18 V to 40 V dc

3.26 3.30 3.34

5.00

5.025 5.05

Full

IO = 2 A to 20 A, VIN = 18 V to 40 V dc

3.2

3.4

4.925

5.125 V

Full

IO = 2 A to 16 A, VIN = 16 V to 50 V dc

3.2

3.4

4.925

5.125 V

Line Regulation

+25

°CV

IO = 20 A, VIN = 18 V to 40 V dc

Load Regulation

+25

°CV

VIN = 28 V dc, IO = 2 A to 20 A

Output Ripple/Noise

+25

°CI

IO = 20 A, 5 kHz – 2 MHz BW

mV p-p

Output Current (IO)

Full

VIN = 18 V to 40 V dc

21.2

Output Overvoltage Protection

+25

°CV

IO = 20 A, Open Remote Sense Connection

145

125

% VO Nom

Output Current Limit

+25

°CV

VO = 90% VOUT Nom

130

% IO max

Output Short Circuit Current

+25

°C I

ISOLATION CHARACTERISTICS

Isolation Resistance

+25

°C I

Input to Output or Any Pin to Case at 500 V dc

100

Ω

DYNAMIC CHARACTERISTICS

Output Voltage Deviation Due to

Step Change in Load

+25

°CV

IO = 10 A to 20 A or 20 A to 10 A di/dt = 0.5 A/µs

350

500

Response Time Due to Step Change in Load

+25

°CV

IO = 10 A to 20 A or 20 A to 10 A, di/dt = 0.5 A/µs,

135

125

µs

Time for VOUT to Return within 2% of Final Value

Soft Start Turn-On Time

+25

°CI

IO = 20 A, From Inhibit High to Status High

THERMAL CHARACTERISTICS

Efficiency

+25

°CI

IO = 12 A

Max

IO = 12 A

Min

IO = 12 A

+25

°CI

IO = 20 A

Max

IO = 20 A

Min

IO = 20 A

Hottest Junction Temperature

+90

°CV

IO = 20 A

110

°C

CONTROL CHARACTERISTICS

Clock Frequency

Full

IO = 2 A

0.85

0.99

0.85

0.99

MHz

ADJUST (Pin 3) V ADJ

+25

°C I

1.26 1.32 1.38

1.92

2.04

2.10

STATUS (Pin 4)

VOH

+25

°CI

IOH = 400 µA

2.4

4.0

2.4

4.0

VOL

+25

°CI

IOL = 1 mA

0.15 0.7

0.15

0.7

VAUX (Pin 5)

VO (nom)

+25

°CI

IAUX = 5 mA, Load Current = 20 A

13.2 13.7 14.2

14.3

14.7

15.3

INHIBIT (Pin 6)

VIL

+25

°C I

0.5

IIL

+25

°CI

VIL = 0.5 V

1.2

VI (Open Circuit)

+25

°C I

SYNC (Pin 7)7

VIH

+25

°C I

4.0

IIH

+25

°CI

VIH = 7.0 V

175

µA

ISHARE (Pin 8)

+25

°CI

IO = 20 A

2.62 2.72 2.82

2.75

2.82

2.95

TEMP (Pin 9)

+25

°C V

3.90

NOTES

150 V dc upper limit rated for transient condition of up to 50 ms. 16 V dc lower limit rated for continuous operation during emergency condition. Steady state and

abnormal input voltage range require source impedance sufficient to insure input stability at low line. See sections entitled System Instability Considerations and Input

Voltage Range.

2Measured at the remote sense points.

3Unit regulates output voltage to zero load.

LOAD = 0.

5Output is fully loaded into a constant resistive load.

6Refer to section entitled Thermal Characteristics for more information.

7Unit has internal pull-down; refer to section entitled Pin 7 (SYNC).

Specifications subject to change without notice.

REV. A

–2–

(TC = +25 C, VIN = 28 V dc

0.5 V dc, unless otherwise noted; full temperature range is

–55 C to +90 C; all temperatures are case and TC is the temperature measured at the center of the package bottom.)

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