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APL5154 Schematic ( PDF Datasheet ) - Anpec Electronics

Teilenummer APL5154
Beschreibung (APL5151 - APL5154) Low Dropout 150mA Fixed Voltage Regulator
Hersteller Anpec Electronics
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Gesamt 16 Seiten
		
APL5154 Datasheet, Funktion
APL5151/2/3/4
Low IQ, Low Dropout 150mA Fixed Voltage Regulator
Features
General Description
Low Noise : 60uVRMS (100Hz to 100kHz)
Low Quiescent Current : 50uA
Low Dropout Voltage : 300mV
(VOUT(Nominal)=3.0V Version @150mA)
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Very low Shutdown Current : < 0.5uA
Fixed Output Voltage : 1.3V,1.4V,1.5V,1.6V,
1.7V,1.8V,1.9V, 2.0V,2.1V,2.2V,2.3V,2.4V,
2.5V,2.6V,2.7V, 2.8V, 2.85V,2.9V,3.0V,3.1V,
3.2V,3.3V,3.4V, 3.5V, 5.0V
Stable with 1uF Output Capacitor
Stable with Aluminum , Tantalum or Ceramic
Capacitors
Reverse Current Protection
No Protection Diodes Needed
Built in Thermal Protection
Built in Current Limit Protection
Controlled Short Circuit Current : 50mA
Fast transient Response
Short Setting Time
SOT-23-5 Package
Lead Free Available (RoHS Compliant)
The APL5151/2/3/4 is micropower, low noise, low drop-
out linear regulator. Operate from 3V to 6V input volt-
age and deliver up to 150mA. Typical output noise is
just 60uVRMS with the addition of an external 0.33uF
bypass capacitor in BP pin and typical dropout voltage
is only 220mV at 150mA loading. Designed for use in
battery-powered system, the low 50uA quiescent cur-
rent makes it an ideal choice. Design with an internal
P-channel MOSFET pass transistor, the APL5151/2/
3/4 maintains a low supply current, independent of
the load current and dropout voltage. Other features
include reverse current protection, thermal-shutdown
protection, current limit protection to ensure speci-
fied output current and controlled short-circuit current.
TheAPL5151/2/3/4 regulatorscome ina miniatureSOT-
23-5 package.
Pin Configuration
VIN 1 5
GND
2
SHDN 3 4
VOUT SHDN
GND
BP VIN
15
2
34
BP
VOUT
APL5151
APL5152
Applications
Notebook Computer
PDA or Portable Equipments
Noise-Sensitive Instrumentation Systems
VOUT
GND
VIN
15
2
34
BP SHDN
GND
SHDN BP
15
2
34
VIN
VOUT
APL5153
APL5154
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. B.4 - May., 2005
1
www.anpec.com.tw






APL5154 Datasheet, Funktion
APL5151/2/3/4
Typical Characteristics
Current Limit vs. Input Voltage
600
APL5151-33
500
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400
300
200
100
0
3.8 4.3 4.8 5.3 5.8 6.3
Input Voltage (V)
Ground Pin Current vs. Load Current
160
APL5151-33
140
120
100
80
60
40
20
0
0 50 100
Load Current (mA)
150
Ground Pin Current vs. Input Voltage
160
APL5151-33
140 IOUT=50mA
120
100
NO LOAD
80
60
40
20
0
012 34 56
Input Voltage (V)
Input Voltage vs. Output Voltage
APL5151-33
3.5
3
2.5
2
1.5
1
0.5
0
0 12 3 45 6
Input Voltage (V)
Copyright © ANPEC Electronics Corp.
Rev. B.4 - May., 2005
6
www.anpec.com.tw

6 Page







APL5154 pdf, datenblatt
APL5151/2/3/4
Thermal Protection
Thermal protection limits total power dissipation in the
device. When the junction temperature exceeds
TJ=+150 , the thermal sensor generates a logic sig-
nal to turn off the pass transistor and allows IC to
cool. When the IC’s junction temperature is down by
10 , the thermal sensor will turn the pass transistor
on again, resulting in a pulsed output during continu-
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ous thermal protection. Thermal protection is designed
to protect the APL5151/2/3/4 in the event of fault
conditions. For continuous operation, do not exceed
the absolute maximum junction temperature of
T =+150 .
J
Operating Region and Power Dis-
sipation
The thermal resistance of the case to circuit board,
and the rate of air flow all control the APL5151/2/3/4’s
maximum power dissipation. The power dissipation
across the device is PD = IOUT (VIN-VOUT) and the maxi-
mum power dissipation is:
PDMAX = (TJ-TA) / ( JC + CA)
where TJ-TA is the temperature difference between the
junction and ambient air, is the thermal resis-
JC
tance of the package, and CA is the thermal resis-
tance through the printed circuit board, copper traces,
and other materials to the ambient air.
The GND pin of the APL5151/2/3/4 provide an electri-
cal connection to ground and channeling heat away.
If power dissipation is large, connect the GND pin to
ground using a large pad or ground plane, can im-
prove the problem of over heat of IC.
Copyright © ANPEC Electronics Corp.
Rev. B.4 - May., 2005
12
www.anpec.com.tw

12 Page


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