Datasheet LTC3105 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | 400mA Step-Up DC/DC Converter with Maximum Power Point Control and 250mV Start-Up |
| Páginas / Página | 18 / 1 — FEATURES. DESCRIPTION. Low Start-Up Voltage: 250mV. Maximum Power Point … |
| Formato / tamaño de archivo | PDF / 496 Kb |
| Idioma del documento | Inglés |
FEATURES. DESCRIPTION. Low Start-Up Voltage: 250mV. Maximum Power Point Control. Wide VIN Range: 225mV to 5V
Línea de modelo para esta hoja de datos
Versión de texto del documento
LTC3105 400mA Step-Up DC/DC Converter with Maximum Power Point Control and 250mV Start-Up
FEATURES DESCRIPTION
n
Low Start-Up Voltage: 250mV
The LTC®3105 is a high efficiency step-up DC/DC converter n
Maximum Power Point Control
that can operate from input voltages as low as 225mV. A n
Wide VIN Range: 225mV to 5V
250mV start-up capability and integrated maximum power n
Auxiliary 6mA LDO Regulator
point controller (MPPC) enable operation directly from low n
Burst Mode
®
Operation: IQ = 24µA
voltage, high impedance alternative power sources such as n Output Disconnect and Inrush Current Limiting photovoltaic cells, TEGs (thermoelectric generators) and n VIN > VOUT Operation fuel cel s. A user programmable MPPC set point maximizes n Antiringing Control the energy that can be extracted from any power source. n Soft Start Burst Mode operation, with a proprietary self adjusting n Automatic Power Adjust peak current, optimizes converter efficiency and output n Power Good Indicator voltage ripple over all operating conditions. n 10-Lead 3mm × 3mm × 0.75mm DFN and 12-Lead The AUX powered 6mA LDO provides a regulated rail for MSOP Packages external microcontrollers and sensors while the main output is charging. In shutdown, IQ is reduced to 10µA
APPLICATIONS
and integrated thermal shutdown offers protection from n Solar Powered Battery/Supercapacitor Chargers overtemperature faults. The LTC3105 is offered in 10-lead n Energy Harvesting 3mm × 3mm × 0.75mm DFN and 12-lead MSOP packages. n Remote Industrial Sensors L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks and ThinSOT and PowerPath are trademarks of Linear Technology Corporation. All other n Low Power Wireless Transmitters trademarks are the property of their respective owners. n Cell Phone, MP3, PMP and GPS Accessory Chargers
TYPICAL APPLICATION Single Photovoltaic Cell Li-Ion Trickle Charger Output Current vs Input Voltage
10µH 80 MPPC DISABLED 70 225mV TO 5V VIN SW V + 60 OUT = 3.3V VOUT PHOTOVOLTAIC VOUT 10µF 4.1V CELL – 50 LTC3105 1020k VOUT = 4.2V 40 FB V Li-Ion OUT = 5V 30 MPPC PGOOD 332k OFF ON SHDN LDO 2.2V 10µF OUTPUT CURRENT (mA) 20 40.2k AUX FBLDO 10 1µF GND 4.7µF 00.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 3105 TA01a INPUT VOLTAGE (V) 3105 TA01b 3105fb For more information www.linear.com/LTC3105 1 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Related Parts
FEATURES DESCRIPTION
n
Low Start-Up Voltage: 250mV
The LTC®3105 is a high efficiency step-up DC/DC converter n
Maximum Power Point Control
that can operate from input voltages as low as 225mV. A n
Wide VIN Range: 225mV to 5V
250mV start-up capability and integrated maximum power n
Auxiliary 6mA LDO Regulator
point controller (MPPC) enable operation directly from low n
Burst Mode
®
Operation: IQ = 24µA
voltage, high impedance alternative power sources such as n Output Disconnect and Inrush Current Limiting photovoltaic cells, TEGs (thermoelectric generators) and n VIN > VOUT Operation fuel cel s. A user programmable MPPC set point maximizes n Antiringing Control the energy that can be extracted from any power source. n Soft Start Burst Mode operation, with a proprietary self adjusting n Automatic Power Adjust peak current, optimizes converter efficiency and output n Power Good Indicator voltage ripple over all operating conditions. n 10-Lead 3mm × 3mm × 0.75mm DFN and 12-Lead The AUX powered 6mA LDO provides a regulated rail for MSOP Packages external microcontrollers and sensors while the main output is charging. In shutdown, IQ is reduced to 10µA
APPLICATIONS
and integrated thermal shutdown offers protection from n Solar Powered Battery/Supercapacitor Chargers overtemperature faults. The LTC3105 is offered in 10-lead n Energy Harvesting 3mm × 3mm × 0.75mm DFN and 12-lead MSOP packages. n Remote Industrial Sensors L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks and ThinSOT and PowerPath are trademarks of Linear Technology Corporation. All other n Low Power Wireless Transmitters trademarks are the property of their respective owners. n Cell Phone, MP3, PMP and GPS Accessory Chargers
TYPICAL APPLICATION Single Photovoltaic Cell Li-Ion Trickle Charger Output Current vs Input Voltage
10µH 80 MPPC DISABLED 70 225mV TO 5V VIN SW V + 60 OUT = 3.3V VOUT PHOTOVOLTAIC VOUT 10µF 4.1V CELL – 50 LTC3105 1020k VOUT = 4.2V 40 FB V Li-Ion OUT = 5V 30 MPPC PGOOD 332k OFF ON SHDN LDO 2.2V 10µF OUTPUT CURRENT (mA) 20 40.2k AUX FBLDO 10 1µF GND 4.7µF 00.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 3105 TA01a INPUT VOLTAGE (V) 3105 TA01b 3105fb For more information www.linear.com/LTC3105 1 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Related Parts