pt5109 China Resources Powtech (Shanghai) Co., Ltd, pt5109 Datasheet - Page 4

• Manufacturer Part Number: pt5109
• Description: High-psrr 300ma Ldo
• Manufacturer: China Resources Powtech (Shanghai) Co., Ltd

Note 1: The Absolute Maximum power dissipation depends on the ambient temperature and can be calculated using
the formula: P
junction-to-ambient thermal resistance. The 364mW rating for SOT23-5 appearing under Absolute Maximum
Ratings results from substituting the Absolute Maximum junction temperature, 150˚C, for T
220˚C/W for θ
dissipated safely at ambient temperatures above 70˚C. The Absolute Maximum power dissipation can be increased
by 4.5mW for each degree below 70˚C, and it must be derated by 4.5mW for each degree above 70˚C.
Note 2: Additional information on lead temperature and pad temperature may be obtained by contact CR PowTech
Note 3: Like the Absolute Maximum power dissipation, the maximum power dissipation for operation depends on
the ambient temperature. The 250mW rating for SOT23-5 appearing under Operating Ratings results from
substituting the maximum junction temperature for operation, 125˚C, for T
More power can be dissipated at ambient temperatures below 70˚C. Less power can be dissipated at ambient
temperatures above 70˚C. The maximum power dissipation for operation can be increased by 4.5mW for each degree
below 70˚C, and it must be derated by 4.5mW for each degree above 70˚C.
Note 4: The target output voltage, which is labeled V
Note 5: All limits are guaranteed. All electrical characteristics having room-temperature limits are tested during
production with T
guaranteed by correlating the electrical characteristics to process and temperature variations and applying statistical
process control.
Note 6: An increase in the load current results in a slight decrease in the output voltage and vice versa.
Note 7: The PSRR is measured by applying a 200mV
2). Due to the very high PSRR performance of the PT5107, it is strongly recommended to use a spectrum analyzer
rather than an oscilloscope to watch the PSRR performance.
Note 8: Dropout voltage is the input-to-output voltage difference at which the output voltage is 100mV below its
nominal value. This specification does not apply for input voltages below 2.5V.
China Resources Powtech (Shanghai) Limited
PT5109_DS Rev EN_2.0
V
IN
=V
OUT(nom)
+1V
D
JA
=(T
. More power can be dissipated safely at ambient temperatures below 70˚C. Less power can be
J
= 25˚C or correlated using Statistical Quality Control (SQC) methods. All hot and cold limits are
J
-T
200mV
A
)/θ
JA
, where T
J
is the junction temperature, T
OUT(nom)
P-P
sine wave on V
WWW.CRPOWTECH.COM
, is the desired voltage option.
A
IN
Figure 2.
Graph show the sine waveform added on V
to measure PSRR
High-PSRR 300mA LDO
is the ambient temperature, and θ
and measure the ripple at V
J
, 70˚C for T
A
, and 220˚C/W for θ
PT5109
J
, 70˚C for T
OUT
(see Figure
JA
JA
Page 4
A
above.
is the
, and
IN