CISSOID
The SOI design Specialists
CHT-LDOS
High-Temperature,
2.5V; 3.3V; 5V; 5.5V; 9V; 10V; 12V; 13V or 15V,
1A, Low-Dropout SOI-CMOS Voltage Regulator
for symmetrical voltage applications.
General Description
The CHT-LDOS is a 1A, low-dropout linear
voltage regulator compatible with high-
temperature
environments.
Typical
operation temperature range extends from
-30° to 225°
C
C.
The circuit is stable throughout the whole
temperature range and under a large
choice of capacitive loads.
The minimum dropout voltage (V
in
-V
out
) is
2V with a 1A load current at 225°C and 1V
for load currents lower than 400mA. The
dropout voltage can span from 1 Volts to
(1)
20 Volts .
The circuit is a one-die solution.
CHT-LDOS is available in die and
packages (currently TO-3 and TO-254) on
demand.
Related documents:
•
AN-06016:
“Selecting
correct
CISSOID regulator depending on your
application”
•
AN-06002:
“Voltage regulator short-
circuit protection and associated
potential startup problem”.
•
•
Preliminary datasheet
Version 1.0 (05/2006)
Features
•
•
•
•
•
•
•
•
1V to 20V dropout Voltage @400mA
2V to 20V dropout Voltage @1A
Max 1A output current @ 225°
C
60dB input ripple rejection (0-100Hz)
C
load
from 100nF to 1000µF, large
ESR range
Available on die or in custom package
on demand. (3-pins compatible)
Stand-by mode available. (4-pins)
Tungsten interconnects for long-term
reliability
The start-up is operative over the
whole temperature range
Latch-up free
(1)
(1)
Available voltages:
•
•
•
•
•
•
•
•
•
CHT-LDOS-025:
CHT-LDOS-033:
CHT-LDOS-050:
CHT-LDOS-055 :
CHT-LDOS-090 :
CHT-LDOS-100 :
CHT-LDOS-120:
CHT-LDOS-130:
CHT-LDOS-150:
2.5V
3.3V
5.0V
5.5V
9.0V
10.0V
12.0V
13.0V
15.0V
Applications
Power supplies for high-temperature
electronic systems used in Well logging,
Automotive, Aeronautics or Aerospace
applications.
Typical application
V
NOM
+2V
C
in
V
in
GND
V
out
V
NOM
C
out
CHT-LDO
CHT-LDOS
CHT-LDOS -
Preliminary datasheet
Absolute Maximum Ratings
Supply Voltage Vin
(2)
Junction Temperature (Tj)
(3)
Power dissipation
-0.3V…40V
315°
C
Operating Conditions
Supply Voltage
Junction temperature
(3)
Power Dissipation
1V to 20V dropout
-30° to 225°C
C
(1)
ESD Rating (expected)
Human Body Model
>1kV
Electrical Characteristics
Following table is relative to the 5V mode (CHT-LDOS-050).
For other nominal voltage, see notes under this table.
Vin =
Vout
+ 2V
Parameter
Condition
Min
Typ
Max
2
80
1
0.04
0.1
Output voltage
accuracy
Output voltage T°
drift
Output voltage line
regulation
I
L
=10mA
-30° <Tj <225°C
C
I
L
=10mA
25°C <Tj <225°C
dropout=2V to 15V
I
L
=60mA, -30° <Tj <225°
C
C
-2
0
-1
0
Units
%
ppm
mV/V
V/A
note
(4)
(5)
(6)
40
Output voltage load
regulation
(i.e. R
out
)
(Vin-Vout)
(droupout)
Quiescent Ground
Pin current
Power supply
rejection ratio
Foldback current
Short-circuit current
Output noise
I
L
=10mA to 1A @2V dropout
-30° <Tj <225°C
C
I
L
≤400mA,
-30°C <Tj <225°C
I
L
=1A, -30° <Tj <225°C
C
0 < I
L
<1A
-30°
C
225°
C
f=0Hz ..100Hz
I
load
=100mA
20°C <Tj <225°C
10Hz-10kHz
I
L
=100mA,
-30°
C
<225°
C
1
2
tbd
3.2
2.9
2.5
300
tbd
V
V
mA
dB
A
mA
µV
RMS
(7)
(8)
<Tj
Notes:
(1) Vin max=30V
(2) Above 225° (T
j
), a minimum load current of few mA could be required.
C
(3) Max Power dissipation depends on packaging. CHT-LDOS in TO-3 or TO-254 packages presents a “junction-to-
case” thermal resistance of maximum 5°C/W (Rth).
(4) ppm are defined as [d(Vout)/d(T)]/Vout. For 5V mode, 40ppm corresponds to 200µV/°C.
(5) Defining “x” as the nominal voltage, the line regulation is better than
x/5
mV/V.
(6) This includes the packaging parasitic resistor.
(7) Defining “x” as the nominal voltage, the typical quiescent current at 2V dropout can be approximated as
2.8+x/13 mA @ -30°C and 2.5+x/13 mA at 225°
C.
(8) Defining “x” as the nominal voltage, the minimum power supply rejection ratio is …(tbd)….
Version 1.0 (17/05/2006)
http://www.cissoid.com
2
CHT-LDOS -
Preliminary datasheet
Output Load, recommended specifications
CHT-LDOS
Resistances in series with capacitors represent the internal ESR of these capacitors.
For large capacitors:
C
B
= 0 to 1000µF
R
B
= 0.2 to
∞ Ω
For medium capacitors:
C
M
= 0 to 6µF
R
M
=0.1 to 1
Ω
For small Capacitors:
C
S
= 100n to 220nF
R
S
=10m to 50m
Ω
Start-up conditions
The start-up is operative over the whole temperature range.
Refer to our application note for more details when using symmetrical voltages.
•
AN-06016:
“Selecting correct CISSOID regulator depending on your application”
•
AN-06002:
“Voltage regulator short-circuit protection and associated potential startup
problem”.
Version 1.0 (17/05/2006)
http://www.cissoid.com
3
CHT-LDOS -
Preliminary datasheet
Measurements
(CHT-LDOS-150)
Note: Temperatures hereafter are ambient temperatures, not junction temperatures.
16
14
12
10
8
6
4
2
0
0
14.9
15.2
V
OUT
(V)
225°
C
-
25°
40°
C
100°
C
150°
C
200°
C
C
V
OUT
(V)
225°
C
200°
C 150°
C
100°
C
15.1
15
25°
C
-
40°
C
-
40°
C
225°
C
0.5
1
1.5
2
I
Load
(A)
2.5
14.8
0
0.5
1
1.5
2
I
Load
(A)
2.5
Figure 1: V
out
vs. I
Load
@ 2V dropout
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
-50
0
50
100
150
200
Figure 2: Zoom on figure 1
15.15
15.1
15.05
15
14.95
I
SC
(A)
V
OUT
(V)
T(°C)
250
14.9
-50
50
150
T(°C)
250
Figure 3: Typical short-circuit current vs. T°
15.2
Figure 4: V
out
vs. T° (2V dropout, 3 samples)
V
OUT
(V)
225°
200°
C
C
150°
100°
C
C
25°
C
15.1
15
14.9
-
40°
C
14.8
15
17
19
21
23
25
27
V
IN
(V)
29
Tbd
Should be very similar to CHT-LDO datasheet
Figure 5: V
out
vs. V
in
over T°
0 .0 0 45
Figure 6: Input ripple rejection
I
quiescent
(A)
0 .0 0 43
0 .0 0 41
-
40°
C
25°
C
0 .0 0 39
0 .0 0 37
100°
C
200°
225°
C
C
Tbd
Should be very similar to CHT-LDO datasheet
V
IN
(V)
28
30
0 .0 0 35
16
18
20
22
24
26
Figure 7: I
Quiescent
vs. V
in
over T°
Figure 8: S
Vout
(V²/Hz) @25°C, I
Load
=100mA
Version 1.0 (17/05/2006)
http://www.cissoid.com
4
Tbd
Should be very similar to CHT-LDO datasheet
Figure 9: Typical max load current over T° vs. dropout
AC rejection, noise and maximum load current vs. dropout measurements have not been
performed yet on CHT-LDOS family. However, based on simulation results, measurements
result should be very similar to those presented in our CHT-LDO family datasheet.
Available packaging and pinout.
TO-3:
(Bottom View)
GND
CASE
TO-254:
Not Connected.
TO-254
CISSOID
CHT-LDO-XXX
V
IN
in
Bottom View
Contact & Ordering
CISSOID S.A.
Chemin du Cyclotron 6
1348 Louvain-la-Neuve
Belgium
Tel : +3210489210
sales@cissoid.com
http://www.cissoid.com
Fax : +3210489219
Product Reference : CHT-LDOS-XXX-YYYY
Ex: CHT-LDOS-050-TO3 = 5V voltage regulator with TO3 package
V
OUT
Vin
gnd
15
0.
Vout
XXX= Output voltage. Example : 3.3V=033 ; 5V =050 ; 15V=150
YYYY=Package. TO3 or TO254 or DIE
Disclaimer
Neither CISSOID, nor any of its directors, employees or affiliates make any representations or extend any warranties
of any kind, either express or implied, including but not limited to warranties of merchantability, fitness for a particular
purpose, and the absence of latent or other defects, whether or not discoverable. In no event shall CISSOID, its
directors, employees and affiliates be liable for direct, indirect, special, incidental or consequential damages of any
kind arising out of the use of its circuits and their documentation, even if they have been advised of the possibility of
such a damage. The circuits are provided “as is”. CISSOID has no obligation to provide maintenance, support,
updates, or modifications.
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