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PDF APL5158 Data sheet ( Hoja de datos )
| Número de pieza | APL5158 | |
| Descripción | 150mA CMOS Low Dropout Regulator | |
| Fabricantes | Anpec Electronics | |
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APL5158
150mA CMOS Low Dropout Regulator With Power OK
Features
• Ultra low ground current : 60µA
• Low Dropout Voltage Regulator, 1.5V
• 150mA Load Current Capability
www.DataSheet4U.c•om Output Voltage Accuracy : ±2% Over Temp.
• Input Voltage Range of 2.7V to 6.0V
• Power Good (POK) Function
• Current Limit Protection
• Thermal Shutdown Protection
• Fast Transient Response
• Stability with low-ESR capacitors
• TTL Logic controlled enable input
• SOT-23-5 Package
General Description
The APL5158 is a precise CMOS LDO with power ok
function. The APL5158 offers 2% output accuracy
over temp, and an ultra low ground current 60µA.
The power good function monitors the output voltage
and indicates when an error occurs in the system
(active low).In the event of an output fault such as
over current, thermal shutdown, the power ok output
is pulled low. The APL5158 also works with low-ESR
output capacitors, reducing the amount of board space
for power applications, critical in hand-held wireless
devices. Key features include current-limit, thermal
shutdown, fast transient response. A compact pack-
age SOT-23-5 is available for space saving purpose.
Pin Configuration
Applications
• Processor power up sequencing
• Laptop,notebook, and palmtop computers
• Wireless LAN
V IN
GND
EN
1 5 VOUT
2
3 4 POK
SOT-23-5
Ordering and Marking Information
APL5158 -
185X
L ea d F ree C od e
H a n d lin g C o d e
Tem p. R ange
P ackage C ode
V o lta g e C o d e
P ackage C ode
B : S O T -2 3 -5
Tem p. R ange
°C : 0 t o 7 0 C
H a n d lin g C o d e
TR : Tape & R eel
V o lta g e C o d e :
1 2 : 1 .2 V
L ea d F ree C od e
L : L e a d F re e D e v ic e
B la n k : O rig in a l D e v ic e
5 - 1 .2 V
X - D a te C o d e
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Copyright ANPEC Electronics Corp.
Rev. A.5 - Aug., 2004
1
www.anpec.com.tw
1 page  
APL5158
Timing Chart
EN
www.DataSheet4U.comVI
90% max
VO
POK
POK Delay 2.5 ms typ.
83% min
Fault Condition
2.5ms
2.5ms
Copyright ANPEC Electronics Corp.
Rev. A.5 - Aug., 2004
5
www.anpec.com.tw
5 Page 
APL5158
Application Information
Thermal Protection
Thermal protection limits total power dissipation in the
APL5158. When the junction temperature exceeds
TJ=+150°C, the thermal sensor generate a logic sig-
nal to turn off the pass transistor and let IC to cool.
When the IC’s junction temperature cools by 15°C,
www.DataSheet4U.com
the thermal sensor will turn the pass transistor on
again, resulting in a pulsed output during continuous
thermal protection. Thermal protection is designed to
protect the IC in the event of fault conditions. For
continual operation, do not exceed the absolute maxi-
mum junction temperature rating of TJ=+150°C.
Operating Region and Power Dissi-
pation
The thermal resistance of the case and circuit board,
ambient and junction air temperature, and the rate of
air flow all control the APL5158’s maximum power
dissipation. The power dissipation across the device
is P = IOUT (VIN-VOUT). The maximum power dissipa-
tion is:
PMAX = (TJ-TA) / (θJB +θBA)
where TJ-TA is the temperature difference between
the junction and ambient air. θJB(or θJB) is the thermal
resistance of the package, θBA is the thermal resis-
tance through the printed circuit board, copper
traces, and other materials to the surrounding air.
The GND pin of the APL5158 provide an electrical
connection to ground and channeling heat away.
Connect the GND pin to ground using a large pad or
ground plane as a heatsink, it can improve maximize
thermal dissipation.
Copyright ANPEC Electronics Corp.
Rev. A.5 - Aug., 2004
11
www.anpec.com.tw
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet APL5158.PDF ] | |
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