DS_ND12S10A_07172008
2
TECHNICAL SPECIFICATIONS
(Ambient Temperature=25°C, minimum airflow=200LFM, nominal V
in
=12Vdc unless otherwise specified.)
PARAMETER
NOTES and CONDITIONS
ND12S0A0V50 (Standard)
Min. Typ. Max.
Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
-0.3
13.8
Vdc
Operating Temperature
Refer to Figure 32 for the measuring point
0
124
°C
Storage Temperature
-40
125
°C
Input/Output Isolation Voltage
Non-isolated
NA
V
INPUT CHARACTERISTICS
Operating Input Voltage
10.2
12.0
13.8
V
Input Under-Voltage Lockout
Turn-On Voltage Threshold
8.5
9.0
9.5
V
Turn-Off Voltage Threshold
7.1
7.6
8.1
V
Lockout Hysteresis Voltage
1.4
V
Maximum Input Current
100% Load, 10.2Vin, 3.3Vout
24
A
No-Load Input Current
Vin=12V, Vout=3.3V
250
mA
Off Converter Input Current
Remote OFF
15
30
mA
Inrush Transient
Vin=10.2~13.8V, Io=Min to Max Load
1.00
A
2
S
Input Reflected-Ripple Current
Refer to Figure 31.
20
mA
Input Ripple Rejection
120Hz
60
dB
OUTPUT CHARACTERISTICS
Output Voltage Adjustment Range
0.9
3.63
V
Output Voltage Set Point
With a 1.0% trim resistor
-2
+2
%
Output Voltage Regulation
Over Load
Io=Io_min to Io_max
-1
+1
%
Over Line
Vin=Vin_min to Vin_max
-0.2
+0.2
%
Total output range
Over load, line, temperature regulation and set point
-3
+3
%
Output Voltage Ripple and Noise
5Hz to 20MHz bandwidth
Peak-to-Peak
Full Load, 1uF ceramic, 10uF Tan cap and 4*680uF OSCON
25
50
mV
RMS
Full Load, 1uF ceramic, 10uF Tan cap and 4*680uF OSCON
5
15
mV
Output Current Range
0 50 A
Output Voltage Over-shoot at Start-up
Vin=12V, Turn ON
2
%
Output Voltage Under-shoot at Power-Off
Vin=12V, Turn OFF
100
mV
Output DC Current-Limit Inception
Hiccup mode
110
200
%Iomax
DYNAMIC CHARACTERISTICS
Output Dynamic Load Response
12Vin, 1uF ceramic, 10uF Tan cap and 4*680uF OSCON
Positive Step Change in Output Current
25A to 37.5A, 10A/uS
75
mV
Negative Step Change in Output Current
37.5A to 25A, 10A/uS
75
mV
Settling Time
Settling to be within regulation band (to 10% Vo deviation)
50
µs
Turn-On Transient
Start-Up Time, from On/Off Control
From Enable high to 90% of Vo
10
ms
Start-Up Time, from input power
From Vin=12V to 90% of Vo
10
ms
Minimum Output Capacitance
Ex: One OSCON 6.3V/680uF (ESR=13m
Ω
max)
680
µF
Maximum Output Startup Capacive Load
Full Load (ESR
≧
1m
Ω
)
3000
µF
Minimum Input Capacitance
0
µF
EFFICIENCY
Vo=0.9V
Vin=12V, Io=50A
81
%
Vo=1.2V Vin=12V,
Io=50A
84.5
%
Vo=1.5V
Vin=12V, Io=50A
87
%
Vo=1.8V Vin=12V,
Io=50A
88.5
%
Vo=2.5V
Vin=12V, Io=50A
91
%
Vo=3.3V Vin=12V,
Io=50A
92.5
%
Vo=3.63V
Vin=12V, Io=50A
92.8
%
FEATURE CHARACTERISTICS
Switching Frequency
Fixed
300
KHz
ON/OFF Control
Positive logic (internally pulled high)
Logic High
Module On (or leave the pin open)
2.4
Vinmax
V
Logic Low
Module Off
-0.2
0.8
V
Remote Sense Range
0.5
V
GENERAL SPECIFICATIONS
Calculated MTBF
Telcordia SR-332 Issue1 Method1 Case3 at 50°C
TBD
Mhours
Weight
34.2
grams
Over-Temperature Shutdown
Refer to Figure 32 for the measuring point
134
°C