Datasheet

DS_D12S400_08042011
2
TECHNICAL SPECIFICATIONS
(All data below are tested at operating ambient temperature 25°C, air flow 300LFM, 5.0Vout, unless otherwise stated.)
PARAMETER NOTES and CONDITIONS D12S400
Min. Typ. Max. Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage Continuous -0.3 13.8 V
Operating Temperature With appropriate air flow and de-rating as Figure 28 0 85 °C
Storage Temperature -40 125 °C
INPUT CHARACTERISTICS
Operating Input Voltage Vo≦3.3V 10.8 12.0 13.2 V
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Vo≦3.3V, Io=1A
4.8 V
Turn-Off Voltage Threshold
Vo≦3.3V, Io=1A
4.5 V
Lockout Hysteresis Voltage 0.3 V
Maximum Input Current 100%Load, 12Vin, 5.0Vout 38 A
No-Load Input Current Total input range 750 mA
Off Converter Input Current Remote OFF, Vin=12V 35 mA
OUTPUT CHARACTERISTICS
Output Voltage Adjustment Range 0.8375 5.0 V
Output Voltage Set Point Measured at remote sense pin -1.5 +1.5 %Vo
Output Voltage Regulation
Over Load Io=Io_min to Io_max -0.5 +0.5 %Vo
Over Line Vin=Vin_min to Vin_max -0.5 +0.5 %Vo
Over Temperature Tc=0°C to 85°C -1.0 +1.0 °C
Total output range Over load, line, temperature regulation and set point -3.5 +3.5 %Vo
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth
Peak-to-Peak Full Load, 10uF Tan cap & 1uF ceramic, total input & output range 50 mV
RMS Full Load, 10uF Tan cap & 1uF ceramic, total input & output range 20 mV
Output Current Range 0 80 A
Output Voltage Over-shoot at Start-up All conditions 0.5 2 % of Vo
Output Voltage Under-shoot at Power-Off Vin=12V, Turn OFF 100 mV
Output DC Current-Limit Inception Hiccup mode 135 %Iomax
DYNAMIC CHARACTERISTICS
Output Dynamic Load Response Without output cap.
Positive Step Change in Output Current 12Vin, 5.0Vout, 0A to 20A, 10A/uS 170 mV
Negative Step Change in Output Current 12Vin, 5.0Vout, 20A to 0A, 10A/uS 170 mV
Settling Time Settling to be within regulation band (to 10% Vo deviation) 20 µs
Turn-On Transient
Start-Up Time, from On/Off Control From Enable high to 90% of Vo 5 ms
Start-Up Time, from input power From Vin=12V to 90% of Vo 10 ms
Power Good Delay All conditions (within 90% of Vo(set)) 2 ms
Minimum Output Capacitance 0 µF
Maximum Output Startup Capacitive Load ESR≥ 1mΩ 0 5000 µF
Minimum Input Capacitance 2200 µF
EFFICIENCY
Vo=1.0V Vin=12V, Io=80A 85.0 %
Vo=1.2V Vin=12V, Io=80A 86.0 %
Vo=1.5V Vin=12V, Io=80A 88.5 %
Vo=1.8V Vin=12V, Io=80A 89.5 %
Vo=2.5V Vin=12V, Io=80A 91.5 %
Vo=3.3V Vin=12V, Io=80A 92.5 %
Vo=5.0V Vin=12V, Io=80A 94.0 %
FEATURE CHARACTERISTICS
Switching Frequency Fixed, Per phase 500 KHz
ON/OFF Control Positive logic (internally pulled high)
Logic High Module On (or leave the pin open) 4.5 5.5 V
Logic Low Module Off -0.3 0.5 V
GENERAL SPECIFICATIONS
Calculated MTBF
12Vin, 5.0Vout, Full load, 55℃, 400LFM
1.0 M hours
12Vin, 5.0Vout, Full load, 25℃, 400LFM
1.4 M hours
Weight 35.0 grams
Over-Temperature Shutdown Refer to Figure 28 for the measuring point 125 °C