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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 hightemperature 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 (Vin-Vout) is 2V with a 1A load current at 225C 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 shortcircuit 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) Cload from 100nF to 1000F, 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
VNOM+2V Cin
Vin GND
Vout
VNOM Cout
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 225C 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
IL=10mA -30 -2 0 -1
0
Units
% ppm mV/V V/A
note
(4) (5) (6)
40
Output voltage load regulation (i.e. Rout) (Vin-Vout) (droupout) Quiescent Ground Pin current Power supply rejection ratio Foldback current Short-circuit current Output noise
IL=10mA to 1A @2V dropout -30 tbd
3.2 2.9 2.5 300 tbd
V V mA dB A mA VRMS
(7) (8)
Notes: (1) Vin max=30V (2) Above 225 (Tj), 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-tocase" thermal resistance of maximum 5C/W (Rth). (4) ppm are defined as [d(Vout)/d(T)]/Vout. For 5V mode, 40ppm corresponds to 200V/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 @ -30C 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: CB= 0 to 1000F RB= 0.2 to For medium capacitors: CM= 0 to 6F RM=0.1 to 1 For small Capacitors: CS= 100n to 220nF RS=10m to 50m
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
VOUT (V)
225 C
25 40 C 100 C 150 C 200 C C
VOUT (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
ILoad (A)
2.5
14.8 0 0.5 1 1.5 2
ILoad (A)
2.5
Figure 1: Vout vs. ILoad @ 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
ISC (A)
VOUT (V)
T(C)
250
14.9 -50 50 150
T(C)
250
Figure 3: Typical short-circuit current vs. T
15.2
Figure 4: Vout vs. T (2V dropout, 3 samples)
VOUT (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
VIN (V)
29
Tbd Should be very similar to CHT-LDO datasheet
Figure 5: Vout vs. Vin over T
0 .0 0 45
Figure 6: Input ripple rejection
Iquiescent (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
VIN(V)
28 30
0 .0 0 35 16 18 20 22 24 26
Figure 7: IQuiescent vs. Vin over T
Figure 8: SVout(V/Hz) @25C, ILoad=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
VIN
in
Bottom View
Contact & Ordering
CISSOID S.A. Chemin du Cyclotron 6 1348 Louvain-la-Neuve Belgium Tel : +3210489210 sales@cissoid.com Fax : +3210489219 http://www.cissoid.com
Product Reference : CHT-LDOS-XXX-YYYY
Ex: CHT-LDOS-050-TO3 = 5V voltage regulator with TO3 package
VOUT
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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