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PDF PT5108X23E-18 Data sheet ( Hoja de datos )
| Número de pieza | PT5108X23E-18 | |
| Descripción | High-PSRR 500mA LDO | |
| Fabricantes | Powtech | |
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PT5108X
High-PSRR 500mA LDO
GENERAL DESCRIPTION
The PT5108 is a low-dropout voltage regulator designed for portable applications that require both low noise performance
and board space. Its PSRR at 1kHz is better than 70dB. The PT5108’s performance is ideal for battery powered systems for
delivering low dropout voltage and low quiescent current. An optional external bypass capacitor reduces the output noise and
increases PSRR.
The device can be used for mobile phone and similar battery powered wireless applications. It provides up to 500mA, from a
2.5V to 5.5V input. The PT5108 consumes less than 0.1µA in shutdown mode and has fast turn-on time less than 150µs. The
PT5108 is available in 5 pin SOT-23 package (Pd free). Selected performances are specified for −40°C to +85°C temperature
range. The output voltage is available in the range of 1.5V to 5.0V.
FEATURES
APPLICATIONS
2.5V to 5.5V input range
CDMA/GSM mobile phone
72dB PSRR @1kHz, Vin = Vout + 1V
Handless telephone
< 1uA quiescent current at shutdown mode
WLAN and Bluetooth appliances
Fast turn on time: 150us (typical)
PDAS/MP3 handsets
290mV maximum dropout voltage with 400mA load
Battery powered portable devices
Thermal shutdown and short-circuit current limit
1.5, 1.8, 2.0, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0V, 3.1V, 3.2V,
3.3V, 4.7V, 4.8V, 4.9V and 5.0V output standard
Miniature SOT-23-5 package (Pd free)
TYPICAL APPLICATIONS
VIN
VIN VOUT
CIN
1uF
VEN
BYPASS
CBP *
10nF
GND
VOUT
COUT
1uF
COUT: Recommended ceramic capacitor
CBP: The optional bypass capacitor for noise reduction
-30
-35
-40
-45
-50
-55
-60
-65
-70
-75
100
Ripple Rejection vs Frequency
VIN(DC) = 3.0V
VIN(AC) = 400mV
VOUT = 2.5V
COUT = 1uF
CBP = 10nF
IOUT=50mA
IOUT=100mA,150mA
1k 10k
Frequency (Hz)
100k
micro-bridge
Page 1
1 page  
PT5108X
High-PSRR 500mA LDO
Note 1: The Absolute Maximum power dissipation depends on the ambient temperature and can be calculated using the formula: PD =(TJ -TA)/θJA,
where TJ is the junction temperature, TA is the ambient temperature, and θJA is the 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 TJ, 70˚C
for TA, and 220˚C/W for θJA. More power can be dissipated safely at ambient temperatures below 70˚C. Less power can be 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 TJ, 70˚C for TA, and 220˚C/W for θJA above. 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 VOUT(nom), is the desired voltage option.
Note 5: All limits are guaranteed. All electrical characteristics having room-temperature limits are tested during production with TJ = 25˚C or
correlated using statistical quality control methods. All hot and cold limits are 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 PRSS is measured by applying a 50mVP-P sine wave on VIN and measure the ripple at VOUT (see Figure 2).
Figure 2. Graph show the sine waveform added on
VIN to measure PSRR
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.
Note 9: Turn-on time is time measured between the enable input just exceeding VIH and the output voltage just reaching 95% of its nominal
value.
Page 5
5 Page 
PACKAGE INFORMATION
SOT23-5
PT5108X
High-PSRR 500mA LDO
Symbo
l
A
A1
A2
A3
b
b1
c
c1
D
E
E1
e
e1
L
L1
L2
R
R1
θ
θ1
θ2
Min
-
0
1.00
0.60
0.36
0.36
0.14
0.14
2.826
2.60
1.526
0.35
0.10
0.10
0°
3°
6°
Millimeters
Typ
-
-
1.10
0.65
-
0.38
-
0.15
2.926
2.80
1.626
0.95BSC
1.90BSC
0.45
0.59REF
0.25BSC
-
-
-
5°
8°
Max
1.25
0.15
1.20
0.70
0.50
0.45
0.20
0.16
3.026
3.00
1.726
0.60
-
0.25
8°
7°
10°
micro-bridge
Page 11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet PT5108X23E-18.PDF ] | |
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