
3.3 - 3
3.3
COM7900T Series
ELECTRICAL CHARACTERISTICS -15 Volt
V
IN
= -23V, I
o
= 500mA, -55°C T
A
125°C (unless otherwise specified)
Parameter
Symbol
Test Conditions
Min.
Max.
Unit
Output Voltage
V
OUT
T
A
= 25°C
-14.7
-15.3
V
V
IN
= -17.5V to -30V
-14.5
-15.5
V
Line Regulation
V
RLINE
V
IN
= -17.5V to -30V
25
m V
(Note 1)
50
m V
V
IN
= -20V to -26V
15
m V
25
m V
Load Regulation
V
RLOAD
I
O
= 5mA to 1.5 Amp
35
m V
(Note 1)
75
m V
I
O
= 250mA to 750 mA
21
m V
45
m V
Standby Current Drain
I
SCD
6.0
m A
6.5
m A
Standby Current Drain
D
I
SCD
V
IN
= -17.5V to -30V
0.8
m A
Change With Line
(Line)
Standby Current Drain
D
I
SCD
I
O
= 5mA to 1000mA
0.5
m A
Change With Load
(Load)
Dropout Voltage
V
D O
D
V
OUT
= 100mV, I
O
=
1.0A
2.5
V
Peak Output Current
I
O (pk)
T
A
= 25°C
1.5
3.3
A
Short Circuit Current
I
DS
V
IN
= -35V
1.2
A
(Note 2)
2.8
A
Ripple Rejection
D
V
IN
f =120 Hz,
D
V
IN
= -10V
53
dB
D
V
OUT
(Note 3)
50
dB
Output Noise Voltage
N
O
T
A
= 25°C, f =10 Hz to 100KHz
40
μV/V
(Note 3)
RMS
Long Term Stability
D
V
OUT
T
A
= 25°C, t = 1000 hrs.
150
m V
(Note 3)
D
t
Notes:
1. Load and Line Regulation are specified at a constant junction temperature. Pulse testing with low duty cycle is used.
Changes in output voltage due to heating effects must be taken into account separately.
2. Short Circuit protection is only assured up to V
IN
= -35V.
3. If not tested, shall be guaranteed to the specified limits.
The denotes the specifications which apply over the full operating temperature range.
3.5
3
2.5
2
1.5
1
0.5
0
0
5
10
15
20
25
30
35
PEAK OUTPUT CURRENT
D
V
OUT
= 100mV
T
j
= -55°C
T
j
= 25°C
T
j
= 150°C
Input To Output Differential (V)
2.5
2
1.5
1
0.5
0
-75 -50 -25
0
25
50
75
100 125 150
DROPOUT VOLTAGE
D
V
OUT
= 100MV
I
OUT
= 0A
I
OUT
= 500mA
I
OUT
= 1A
Junction Temperature (°C)
100
80
60
40
20
0
10
100
1k
10k
100k
RIPPLE REJECTION
V
OUT
= 5V
V
IN
- V = 8V
DC
+3.5V
rms
I
OUT
= 1A
T
j
= 25°C
Frequency (Hz)
TYPICAL PERFORMANCE CHARACTERISTICS