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CHT-LDOP Datasheet
Version: 2.8
20-Dec-23
(Last Modification Date)
High-Temperature, 1A, Low-Dropout Volt-
age Regulator
5V; (2.5V; 3.3V, 5.5V; 5.6V; 7.5V, 9V; 10V; 12V; 13V or 15V)
General Description
The CHT-LDOP is a 1A, low-dropout linear
voltage regulator compatible with high-
temperature environments. Typical operation
temperature range extends from -55°C to
225°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 20 Volts
(1)
.
The circuit is a one-die solution.
Related documents:
• AN-06016: “Selecting correct CISSOID
regulator depending on your application”
• AN-06002: “Voltage regulator short-
circuit protection and associated potential
startup problem”.
• AN-090477: “Power Dissipation Consid-
erations During Short Circuit Conditions”
CISSOID recommends the use of CHT-
LDOS device since it is suitable for both
unipolar and bipolar power supplies and
has the same characteristics as CHT-
LDOP except the short-circuit current
Applications
Power supplies for high-temperature elec-
tronic systems used in Well logging, Automo-
tive, Aeronautics or Aerospace applications.
Features
• 1V to 20V dropout Voltage @400mA
(1)
• 2V to 20V dropout Voltage @1A
(1)
• Max 1A output current @ 225°C
• 60dB input ripple rejection (0-100Hz)
• C
load
from 100nF to 1000µF, large ESR
range
• Output voltage programmable by bonding
option (bare die version)
• Available in TO-254 package and bare
die form (contact CISSOID)
• The start-up is operative over the whole
temperature range
• Latch-up free
• Validated at 225°C for 43800 hours (and
still on-going)
Active
• CHT-LDOP-050: 5V
Legacy (Not for new designs)
• CHT-LDOP-033: 3.3V
• CHT-LDOP-120: 12.0V
• CHT-LDOP-150: 15.0V
• CHT-LDOP-025: 2.5V
• CHT-LDOP-055: 5.5V
• CHT-LDOP-056: 5.6V
• CHT-LDOP-075: 7.5V
• CHT-LDOP-090: 9.0V
• CHT-LDOP-100: 10.0V
• CHT-LDOP-130: 13.0V
Note that these legacy devices can be replaced by
CHT-LDOS equivalent: see section “Replacement
of CHT-LDOP by CHT-LDOS” on page 4.
Typical application
CHT-LDOP
Datasheet
20-Dec-23
(Last Modification Date)
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Absolute Maximum Ratings
Supply Voltage V
in
to GND -0.3V to 40V
Junction Temperature
(2)
T
j
300°C
Power dissipation
(3)
ESD Rating (expected)
Human Body Model <1kV
Operating Conditions
Supply Voltage V
in
to GND V
out
+(1V to 20V)
(1)
Junction temperature -55°C to +225°C
Power dissipation
(3)
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress
only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this speci-
fication is not implied. Frequent or extended exposure to absolute maximum rating conditions or above may affect device reliability.