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PDF SGM2019 Data sheet ( Hoja de datos )
| Número de pieza | SGM2019 | |
| Descripción | RF-Linear Regulators | |
| Fabricantes | Shengbang Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SGM2019 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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SGM2019
Low Power, Low Dropout,
RF-Linear Regulators
GENERAL DESCRIPTION
The SGM2019 series low-power, low-noise, low-dropout,
CMOS linear voltage regulators operate from a 2.5V to
5.5V input voltage. They are the perfect choice for low
voltage, low power applications. A low ground current
makes this part attractive for battery operated power
systems. The SGM2019 series also offer ultra low
dropout voltage to prolong battery life in portable
electronics. Systems requiring a quiet voltage source,
such as RF applications, will benefit from the SGM2019
series’ ultra low output noise (30µVRMS) and high PSRR.
An external noise bypass capacitor connected to the
device’s BP pin can further reduce the noise level.
FEATURES
Low Output Noise
Low Dropout Voltage
Thermal-Overload Protection
Output Current Limit
High PSRR (74dB at 1kHz)
10nA Logic-Controlled Shutdown
Available in Multiple Output Voltage Versions
Fixed Outputs of 1.2V, 1.5V, 1.8V, 2.5V, 2.6V, 2.8V,
2.85V, 3.0V and 3.3V
Adjustable Output from 1.2V to 5.0V
-40℃ to +85℃ Operating Temperature Range
Available in Green SC70-5 and SOT-23-5 Packages
The output voltage is preset to voltages in the range of
1.2V to 5.0V. Other features include a 10nA logic-
controlled shutdown mode, foldback current limit and
thermal shutdown protection.
The SGM2019 is available in Green SOT-23-5 and
SC70-5 packages. It operates over an ambient
temperature range of -40℃ to +85℃.
APPLICATIONS
Cellular Telephones
Cordless Telephones
PCMCIA Cards
Modems
MP3 Player
Hand-Held Instruments
Palmtop Computers
Electronic Planners
Portable/Battery-Powered Equipment
PRODUCT NAME STRUCTURE
SGM2019 - X X X G / TR
Tape and Reel
Green Product
Package Type
C5 SC70-5
N5 SOT-23-5
Operating Temperature Range
Y -40℃ to +85℃
Output Voltages
1.2 1.2V
1.5 1.5V
1.8 1.8V
2.5 2.5V
2.6 2.6V
2.8 2.8V
2.85 2.85V
3.0 3.0V
3.3 3.3V
ADJ Adjustable
SG Micro Corp
www.sg-micro.com
REV. C
1 page  
SGM2019
TYPICAL APPLICATION CIRCUIT
Low Power, Low Dropout,
RF-Linear Regulators
INPUT
2.5V to 5.5V
IN
OUT
CIN
1μF
ON
OFF
SGM
2019-ADJ
EN FB
GND
OUTPUT
R1
COUT
1μF
R2
Standard 1% Resistor Values for Common Output Voltages of Adjustable Voltage Version
VOUT (V)
1.2
1.5
1.8
2.8
3.0
3.3
3.6
4.2
R1 (kΩ)
0
10.5
34
84.5
63.4
73.2
84.5
105
R2 (kΩ)
63.4
42.2
63.4
63.4
42.2
42.2
42.2
42.2
NOTE: VOUT = (R1 + R2)/ R2 × 1.207
SG Micro Corp
www.sg-micro.com
5
5 Page 
SGM2019
Low Power, Low Dropout,
RF-Linear Regulators
APPLICATION NOTE
When LDO is used in handheld products, attention must be paid to voltage spikes which could damage SGM2019. In
such applications, voltage spikes will be generated at charger interface and VBUS pin of USB interface when charger
adapters and USB equipments are hot-plugged. Besides this, handheld products will be tested on the production line
without battery. Test engineer will apply power from the connector pin which connects with positive pole of the battery.
When external power supply is turned on suddenly, the voltage spikes will be generated at the battery connector. The
voltage spikes will be very high, and it always exceeds the absolute maximum input voltage (6.0V) of LDO. In order to
get robust design, design engineer needs to clear up this voltage spike. Zener diode is a cheap and effective solution to
eliminate such voltage spike. For example, BZM55B5V6 is a 5.6V small package Zener diode which can be used to
remove voltage spikes in cell phone designs. The schematic is shown below.
Vcc
Input
BZM55B5V6
1 IN
1μF C1
SGM2019
VOUT
5
C2
4.7μF
VOUT
EN GND
32
BP
4
0.01μF
Control
SG Micro Corp
www.sg-micro.com
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet SGM2019.PDF ] | |
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