|
|
PDF TC1305 Data sheet ( Hoja de datos )
| Número de pieza | TC1305 | |
| Descripción | Dual 150mA CMOS LDO | |
| Fabricantes | Microchip Technology | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de TC1305 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
|
No Preview Available !
TC1305
Dual 150mA CMOS LDO With Select Mode™ Operation,
Shutdown and Independent RESET Output
Features
• Extremely Low Supply Current for Longer Battery
Life
• Select Mode™ Operation: Selectable Output
www.DataSheet4U.com Voltages for High Design Flexibility
• Very Low Dropout Voltage
• 29µVRMS Typical Output Noise
• 10µsec (Typ.) Wake-Up Time from SHDN
• 150mA Output Current per Output
• High Output Voltage Accuracy
• Power-Saving Shutdown Mode
• RESET Output Can Be Used as a Low Battery
Detector or Processor Reset Generator
• Over Current Protection and Over Temperature
Shutdown
• Space Saving 10-Pin MSOP Package
Applications
• Load Partitioning
• Battery Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Pagers and Cellular/PHS Phones
• Linear Post-Regulator for SMPS
Device Selection Table
Part Number
Package
Junction
Temperature
Range
TC1305R-DVUN 10-Pin MSOP -40°C to +85°C
NOTE: “R” denotes the suffix for the 2.63V VDET threshold.
“D” indicates VOUT1 = VOUT2 = 2.5, 2.8, 3.0 (selectable).
Other output voltages are available. Please contact Microchip
Technology Inc. for details.
Package Type
10-Pin MSOP
VDET 1
VIN 2
GND 3
SELECT 4
SHDN1 5
TC1305
10 RESET
9 VOUT2
8 VOUT1
7 Bypass
6 SHDN2
General Description
The TC1305 combines two CMOS Low Dropout Regu-
lators and a Microprocessor Monitor in a space saving
10-Pin MSOP package. Designed specifically for
battery operated systems, total supply current is
typically 120µA at full load, 20 to 60 times lower than in
bipolar regulators.
The TC1305 features selectable output voltages for
higher design flexibility. The tri-state SELECT input pin
allows the user to select VOUT1 and VOUT2 from 3
different values (2.5V, 2.8V and 3.0V).
An active low RESET is asserted when the detected
voltage (VDET) falls below the 2.63V reset voltage
threshold. The RESET output remains low for 300msec
(typical) after VDET rises above reset threshold. When
the shutdown controls (SHDN1 and SHDN2) are low,
the regulator output voltages fall to zero, RESET output
remains valid and supply current is reduced to 20µA
(typ.)
Other key features for the device include ultra low noise
operation, fast response to step changes in load and
very low dropout voltage (typically 150mV at full load).
The device also incorporates both over temperature
and over current protection. Each regulator is stable
with an output capacitor of only 1µF and has a
maximum output current of 150mA. The TC1305 is
featured in a 10-Pin MSOP package with selective
output voltages.
Typical Application
VDET
VIN
GND
SELECT
SHDN1
1
2
3
4
5
TC1305
10 RESET
9
3.3µF
VOUT2
8
3.3µF
VOUT1
7
470pF Bypass
(Optional)
6
SHDN2
© 2002 Microchip Technology Inc.
DS21526A-page 1
1 page  
3.0 DETAILED DESCRIPTION
The TC1305 is a precision fixed output voltage
regulator that contains two fully independent 150mA
regulator outputs. The device features separate
shutdown modes for low-power operation, and a
common bypass pin that can be used to further reduce
output noise. The Select Mode™ operation allows the
user to select VOUT1 and VOUT2 from three different
values (2.5V, 2.8V, 3.0V), therefore providing high
design flexibility. The CMOS construction of the
TC1305 results to a very low supply current, which
does not increase with load changes. In addition, VOUT
remains stable and within regulation at no load
www.DataSheet4U.comcurrents.
The TC1305 also features an integrated microproces-
sor supervisor that monitors power-up, power-down,
and brown-out conditions. The active low RESET
signal is asserted when the detected voltage VDET falls
below the reset voltage threshold (2.63V). The RESET
output remains low for 300msec (typical) after VDET
rises above the reset threshold. The RESET output of
the TC1305 is ensured valid down to VDET = 1V and is
optimized to reject fast transient glitches on the
monitored power supply line.
TC1305
4.0 TYPICAL APPLICATIONS
4.1 Input and Output Capacitor
The TC1305 is stable with a wide range of capacitor
values and types. A capacitor with a minimum value of
1µF from VOUT to Ground is required. The output
capacitor should have an effective series resistance
(ESR) of 0.1Ω to 10Ω for a 1µF capacitor and 0.01Ω to
10Ω for a 10µF capacitor. A 1µF capacitor should be
connected from the VIN to GND if there is more than 10
inches of wire between the regulator and the AC filter
capacitor, or if a battery is used as the power source.
Aluminum electrolytic or tantalum capacitor types can
be used. (Since many aluminum electrolytic capacitors
freeze at approximately -30°C, solid tantalums are
recommended for applications operating below -20°C).
When operating from sources other than batteries,
supply-noise rejection and transient response can be
improved by increasing the value of the input and
output capacitors and employing passive filtering
techniques.
4.2 Bypass Capacitor
A 0.01µF capacitor connected from the bypass input to
ground reduces noise present on the internal
reference, which in turn significantly reduces output
noise. If output noise is not a concern, this input may be
left unconnected.
Larger capacitor values may be used, but result in a
longer time period to rated output voltage when power
is initially applied.
4.3 Shutdown Mode
Applying a logic high to each of the shutdown pins turns
on the corresponding output. Each regulator enters
shutdown mode when a logic low is applied in the
corresponding input. During shutdown mode, the out-
put voltage falls to zero, and regulator supply current is
reduced to 0.5µA (max). If shutdown mode is not
necessary, the pins should be connected to VIN.
© 2002 Microchip Technology Inc.
DS21526A-page 5
5 Page 
TC1305
6.0 TYPICAL CHARACTERISTICS (CONTINUED)
Line Transient Response
VOUT2
Line Transient Response
VOUT2
www.DataSheet4U.com
VOUT1
VIN
3.6V
COUT1 = COUT2 = 10µF Ceramic
RLOAD = 30kΩ
4.6V
VOUT1
VIN
3.6V
COUT1 = COUT2 = 1µF Tantalum
RLOAD = 30kΩ
4.6V
Load Transient Response
VOUT2
VOUT1
COUT1 = COUT2 = 1µF Tantalum
VIN = 5.5V
RLOAD = 30kΩ
RL = 30kΩ
100mA
100µA
Load Transient Response
VOUT2
VOUT1
COUT1 = COUT2 = 10µF Ceramic
VIN = 5.5V
RLOAD = 30kΩ
RL = 30kΩ
100mA
100µA
Load Transient Response
VOUT2
VOUT1
COUT1 = COUT2 = 10µF Ceramic
VIN = 5.5V
RLOAD = 30kΩ
RL = 30kΩ
100mA
100µA
Load Transient Response
VOUT2
VOUT1
COUT1 = COUT2 = 1µF Tantalum
VIN = 5.5V
RLOAD = 30kΩ
RL = 30kΩ
100mA
100µA
© 2002 Microchip Technology Inc.
DS21526A-page 11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet TC1305.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| TC1300 | 300 mA CMOS LDO | Microchip Technology |
| TC1300H | (TC1xxxH) SURFACE MOUNT THYRISTOR SURGE PROTECTIVE DEVICE |  Lite-On Technology |
| TC1300H | (TC1100H - TC1800H) SURFACE MOUNT THYRISTOR SURGE PROTECTIVE DEVICE |  Lite-On |
| TC1301 | Low Noise and Medium Power GaAs FETs |  Transcom |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |