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PDF CM2833 Data sheet ( Hoja de datos )
| Número de pieza | CM2833 | |
| Descripción | 300mA CMOS LDO | |
| Fabricantes | Champion | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de CM2833 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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CM2833
300mA CMOS LDO WITH ENABLE
GENERAL DESCRIPTION
FEATURES
The CM2833 family is a positive voltage linear regulator
developed utilizing CMOS technology featured low quiescent
current (30µA typ.), low dropout voltage, and high output
voltage accuracy, making them ideal for battery applications.
EN input connected to CMOS has low bias current. The
space-saving SOT-23-5 package is attractive for “Pocket” and
“Hand Held” applications.
These rugged devices have both Thermal Shutdown, and
Current Fold-back to prevent device failure under the “Worst”
of operating conditions.
In application requiring a low noise, regulated supply, place a
1000pF capacitor between Bypass and Ground.
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Very Low Dropout Voltage
Low Current Consumption: Typ. 30µA, Max. 35µA
Output Voltage: 1.8V, 1.9V, 2.2V, 2.5V, 2.7V, 2.8V, 3.0V,
3.3V, 3.5V, 3.6V, and 3.8V
High Accuracy Output Voltage: +/- 1.5%
Guaranteed 300mA Output
Input Range up to 7.0V
Thermal Shutdown
Current Limiting
Compact Package: SOT-23-5
Factory Pre-set Output Voltages
Short Circuit Current Fold-Back
Low Temperature Coefficient
The CM2833 is stable with an output capacitance of 2.2µF or
greater.
APPLICATIONS
! Battery-powered devices
! Personal communication devices
! Home electric/electronic appliances
! PC peripherals
TYPICAL APPLICATIONS
24 Hours Technical Support--WebSIM
Champion provides customers an online circuit simulation tool
called WebSIM. You could simply logon our website at
www.champion-micro.com for details.
IN
5V
IN OUT
CM2833
BYP GND EN
C1
1uF
C2
1nF
OUT
C3
2.2uF
2003/11/20 Rev. 1.2
Champion Microelectronic Corporation
Page 1
1 page  
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CM2833
300mA CMOS LDO WITH ENABLE
DETAILED DESCRIPTION
The CM2833 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current
protection, thermal shutdown, and short circuit protection.
The P-channel pass transistor receives data from the error amplifier, over-current shutdown, short output 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 150℃, or the current exceeds 300mA.
During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops
below 120℃.
The CM2833 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents
over-stress. The CM2833 also incorporates current fold-back to reduce power dissipation when the output is short-circuited. This
feature becomes active when the output drops below 1.05V, and reduces the current flow by 65%. Full current is restored when
the voltage exceeds 0.95V.
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 CM2833 is stable with an output capacitor to ground of 2.2µF or greater. It can keep stable even with higher or poor 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.
2003/11/20 Rev. 1.2
Champion Microelectronic Corporation
Page 5
5 Page 
www.DataSheet4U.com
CM2833
300mA CMOS LDO WITH ENABLE
IMPORTANT NOTICE
Champion Microelectronic Corporation (CMC) reserves the right to make changes to its products or to discontinue any integrated
circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify,
before placing orders, that the information being relied on is current.
A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe property or
environmental damage. CMC integrated circuit products are not designed, intended, authorized, or warranted to be suitable for
use in life-support applications, devices or systems or other critical applications. Use of CMC products in such applications is
understood to be fully at the risk of the customer. In order to minimize risks associated with the customer’s applications, the
customer should provide adequate design and operating safeguards.
HsinChu Headquarter
5F, No. 11, Park Avenue II,
Science-Based Industrial Park,
HsinChu City, Taiwan
T E L : +886-3-567 9979
F A X : +886-3-567 9909
Sales & Marketing
11F, No. 306-3, SEC. 1, Ta Tung Road,
Hsichih, Taipei Hsien 221, Taiwan
T E L : +886-2-8692 1591
F A X : +886-2-8692 1596
2003/11/20 Rev. 1.2
Champion Microelectronic Corporation
Page 11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet CM2833.PDF ] | |
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