DS_ND40A_08072008
2
TECHNICAL SPECIFICATIONS
(Ambient Temperature=25°C, minimum airflow=300LFM, nominal Vin=12Vdc unless otherwise specified.)
PARAMETER NOTES and CONDITIONS ND12S0A0V40 (standard)
Min. Typ. Max. Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous) 0 13.8 Vdc
Operating Temperature Refer to Figure 30 for the measuring point 0 +120 °C
Storage Temperature -40 +125 °C
INPUT CHARACTERISTICS
Operating Input Voltage 8.0 12 13.8 Vdc
Input Under-Voltage Lockout Io= 50% of Io,max
Turn-On Voltage Threshold 7.8 Vdc
Turn-Off Voltage Threshold 6.2 Vdc
Lockout Hysteresis Voltage 1.6 Vdc
Maximum Input Current Vin= 8V, Vo=5V, 100%Load 40 Adc
Inrush Current
Peak Inrush Current 200 Apk
Recovery Time Inrush Decay to Normal 100 mS
External Input Capacitance The dielectric of ceramic capacitance shell be X5R or X7R 22 100 μF
Load Transient Effects on Input Current Refer to dynamic step load 2 A/μS
Vo Peak Deviation of Input Step Response Vin step change of ±1.8V , dv/dt of Vin =0.2V/µS 100 mV
OUTPUT CHARACTERISTICS
Output Voltage Adjustable Range Selected by an external resistor 0.9 5.0 Vdc
Output Voltage Set Point Io=Io,max ,Rtrim:±0.1% tolerance , Tc=±25ppm -1 +1 % Vo,set
Stability, Long Term Voltage Drift Vin=12V,Io=Io,max, record over 24hours -0.1 +0.1 % Vo,set
Output Voltage Regulation
Over Line Vin=Vin,min to Vin,max 0.2 % Vo,set
Over Load Io=Io,min to Io,max 0.5 % Vo,set
Over Temperature Ta= - 5 ℃ to 60℃ 0.75 % Vo,set
Total Output Voltage Range Over all operation input voltage, resistive load, and
temperature conditions until end of life -3.0 +3.0 % Vo,set
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth, 10µF tantalum // 1µF ceramic,
Vin=min to max, Io=min to max
Peak-to-Peak 0.9≦Vo,set<1.5V 30 mVp-p
Peak-to-Peak 1.5≦Vo,set<3.5V 40 mVp-p
Peak-to-Peak 3.5≦Vo,set≦5.0V 85 mVp-p
Output Current Range 0 40 Adc
External output capacitance Load
Minimum Output capacitance ESR≧2mΩ 300 μF
Maximum Output capacitance ESR≧0.2mΩ 2000 μF
Loop Stability Cout from 300µF to 2000µF
Phase Margin 45 Degree
Gain Margin 10 dB
Output Voltage Over-shoot at Start-up 0 5 % Vo,set
Output Current-Limit Inception Hiccup mode 110 200 %Io,max
Output Over Voltage Protection Hiccup mode 110 % Vo,set
DYNAMIC CHARACTERISTICS
Dynamic Load Response 5Hz to 20MHz bandwidth, 10µF tantalum // 1µF ceramic,
dIo/dt=2.5A/Us, Step load Freq.=200Hz~ 2.5KHz
Positive Step Change in Output Current 50% Io, max to 100% Io, max 150 200 mVpk
Negative Step Change in Output Current 100% Io, max to 50% Io, max 150 200 mVpk
Setting Time Vout<1% of final steady value 100 µs
Turn-On Transient Io=Io,max
Start-up Time, From On/Off Control From Enable High to 90% of Vo 7 ms
Start-Up Time, From Input From Vin to 90% of Vo 7 ms
EFFICIENCY
Vo,set=0.9V Vin=12V, Io=Io,max, Ta=25℃ 80 82 %
Vo,set=1.0V Vin=12V, Io=Io,max, Ta=25℃ 82 84 %
Vo,set=1.2V Vin=12V, Io=Io,max, Ta=25℃ 83 86 %
Vo,set=1.8V Vin=12V, Io=Io,max, Ta=25℃ 84 89 %
Vo,set=2.5V Vin=12V, Io=Io,max, Ta=25℃ 84 90 %
Vo,set=3.3V Vin=12V, Io=Io,max, Ta=25℃ 86 92 %
Vo,set=5.0V Vin=12V, Io=Io,max, Ta=25℃ 89 94 %
FEATURE CHARACTERISTICS
Switching Frequency 500kHz operation for 2.2V≦Vo,set≦5.0V 500/220 kHz
ON/OFF Control, (Logic High-Module ON)
Logic High Voltage Module On 2.7 Vdc
Logic Low Voltage Module Off 0.44 Vdc
Logic High Current 125 μA
Logic Low Current 250 μA
Power Good
PG Delay Time from Vin Vin=Vin,min, Vo is between 95% - 105% of Vo,set 15 mS
PG Delay Time from Enable Enable=H, Vo is between 95% - 105% of Vo,set 15 mS
Remote Sense Range
Compensation Voltage 50 mV
Vo,max When Remote Sense Line Open 105 %Vo,set
GENERAL SPECIFICATIONS
MTBF Io=80%Io, max, Ta=25℃ 3.6 M hours
Weight 20.5 grams