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PDF AP139 Data sheet ( Hoja de datos )
| Número de pieza | AP139 | |
| Descripción | Low-Noise CMOS LDO | |
| Fabricantes | Anachip | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AP139 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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300mA Low-Noise CMOS LDO
Features
- Very low dropout voltage
- Low current consumption: Typ.45µA, Max. 60µA
- Output voltage: 1.5V,1.8V,2.0V, 2.5V, 2.8V, 3.0V
3.3V, and 3.5V
- Guaranteed 300mA output
- Input range up to 7.0V
- Thermal shutdown
- Current limiting
- Stability with low ESR capacitors
- Low temperature coefficient
- Pb-free package: SOT23-5L,TSOT23-5L
Applications
- Battery-powered devices
- Personal communication devices
- Home electric/electronic appliances
- PC peripherals
AP139
General Descriptions
The AP139 is a positive voltage linear regulator
utilizing CMOS technology. The features that
include low quiescent current (45µA typ.), low
dropout voltage, and high output voltage accuracy,
make it ideal for battery applications. EN input
connected to CMOS has low bias current. The
space-saving SOT23-5L and TSOT23-5L package
is attractive for “Pocket” and “Hand Held”
applications.
This rugged device has both thermal shutdown, and
current limit protections to prevent device failure
under the “Worst” operating conditions.
In a low noise, regulated supply application, a 10nF
capacitor is necessary to be placed in between
Bypass and Ground.
The AP139 is stable with a low ESR output
capacitor of 1.0µF or greater.
Pin Assignments
(Top View)
VOUT
5
BYP
4
AP139
123
VIN GND EN
SOT23-5/TSOT23-5
Ordering Information
AP139 XX X X
Pin Descriptions
Pin Pin
Name No.
Function
VIN
GND
1 Power Supply
2 Ground
EN 3 Enable Pin
BYP 4 Bypass Signal Pin
VOUT
5 Output
Output voltage
15: 1.5V
18: 1.8V
20: 2.0V
25: 2.5V
28: 2.8V
30: 3.0V
33: 3.3V
35: 3.5V
Package
W : SOT23-5L
TW:TSOT23-5L
Packing
Blank: Tube
A: Taping
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev.1.1 Jun 02, 2006
1/8
1 page  
300mA Low-Noise CMOS LDO
AP139
Typical Performance Characteristics (Continued)
Vcc Vs Short Current
400
350
300
250
200 Top to bottom
150 Vout=1.5V
Vout=1.8V
100 Vout=2.5V
50 Vout=3.3V
0
3.5 4 4.5 5 5.5 6 6.5 7
Vcc (V)
Function Description
The AP139 of CMOS regulators contain a PMOS
pass transistor, voltage reference, error amplifier,
over-current protection, thermal shutdown.
The P-channel pass transistor receives data from
the error amplifier, over-current protection, and
thermal protection circuits. During normal operation,
the error amplifier compares the output voltage to a
precision reference. Over-current and thermal
shutdown circuits become active when the junction
temperature exceeds 130oC, or the current exceeds
300mA. During thermal shutdown, the output
voltage remains low. Normal operation is restored
when the junction temperature drops below 110oC.
The AP139 switches from voltage mode to current
mode when the load exceeds the rated output
current. This prevents over-stress.
Enable
The enable pin normally floats high. When actively,
pulled low, the PMOS pass transistor shut off, and
all internal circuits are powered down. In this state,
the quiescent current is less than 2µA. This pin
behaves much like an electronic switch.
External Capacitor
The AP139 is stable with a low ESR output
capacitor to ground of 1.0µF or greater. It can keep
stable even with higher ESR capacitors. A second
capacitor is recommended between the input and
ground to stabilize VIN. The input capacitor should
be larger than 0.1µF to have a beneficial effect. All
capacitors should be placed in close proximity to
the pins. A “quiet” ground termination is desirable.
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Jun 02, 2006
5/8
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet AP139.PDF ] | |
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