Datasheet LTC3129-1 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 15V, 200mA Synchronous Buck-Boost DC/DC Converter with 1.3μA Quiescent Current |
| Pages / Page | 30 / 1 — FeaTures. DescripTion. Regulates VOUT Above, Below or Equal to VIN. Wide … |
| File Format / Size | PDF / 1.7 Mb |
| Document Language | English |
FeaTures. DescripTion. Regulates VOUT Above, Below or Equal to VIN. Wide VIN Range: 2.42V to 15V, 1.92V to 15V After
Model Line for this Datasheet
Text Version of Document
LTC3129-1 15V, 200mA Synchronous Buck-Boost DC/DC Converter with 1.3µA Quiescent Current
FeaTures DescripTion
n
Regulates VOUT Above, Below or Equal to VIN
The LTC®3129-1 is a high efficiency, 200mA buck-boost n
Wide VIN Range: 2.42V to 15V, 1.92V to 15V After
DC/DC converter with a wide VIN and VOUT range. It
Start-Up (Bootstrapped)
includes an accurate RUN pin threshold to allow predict- n
Fixed Output Voltage with Eight User-Selectable
able regulator turn-on and a maximum power point control
Settings from 2.5V to 15V
(MPPC) capability that ensures maximum power extraction n
200mA Output Current in Buck Mode
from non-ideal power sources such as photovoltaic panels. n
Single Inductor
The LTC3129-1 employs an ultralow noise, 1.2MHz PWM n
1.3µA Quiescent Current
switching architecture that minimizes solution footprint by n
Programmable Maximum Power Point Control allowing the use of tiny, low profile inductors and ceramic n
1.2MHz Ultralow Noise PWM capacitors. Built-in loop compensation and soft-start n
Current Mode Control simplify the design. For high efficiency operation at light n
Pin Selectable Burst Mode® Operation loads, automatic Burst Mode operation can be selected, n Up to 95% Efficiency reducing the quiescent current to just 1.3µA. To further n
Accurate RUN Pin Threshold reduce part count and improve light load efficiency, the n Power Good Indicator LTC3129-1 includes an internal voltage divider to provide n 10nA Shutdown Current eight selectable fixed output voltages. n Thermally Enhanced 3mm × 3mm QFN and 16-Lead MSOP Packages Additional features include a power good output, less than 10nA of shutdown current and thermal shutdown.
applicaTions
The LTC3129-1 is available in thermal y enhanced n Industrial Wireless Sensor Nodes 3mm × 3mm QFN and 16-lead MSOP packages. For an n Post-Regulator for Harvested Energy adjustable output voltage, see the functionally equivalent n Solar Panel Post-Regulator/Charger LTC3129. n Intrinsically Safe Power Supplies L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks n Wireless Microphones of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Avionics-Grade Wireless Headsets
Typical applicaTion Efficiency and Power Loss vs Load
22nF 22nF 10µH 100 1000 90 EFFICIENCY BST1 SW1 SW2 BST2 VOUT VIN 80 100 VIN VOUT 5V AT 2.42V TO 15V POWER LOSS (mW) 100mA V 10µF IN < VOUT 70 LTC3129-1 200mA VIN > VOUT 60 10 10µF RUN 50 POWER LOSS V MPPC PGOOD 40 1 CC EFFICIENCY (%) AA OR AAA 30 BATTERIES PWM 20 VIN = 2.5V 0.1 V VS1 V IN = 3.6V CC 10 VIN = 5V VS2 V V OUT = 5V IN = 15V 0 0.01 VS3 GND PGND 2.2µF 0.01 0.1 1 10 100 1000 OUTPUT CURRENT (mA) 3129 TA01b 31291 TA01a 31291fc For more information www.linear.com/LTC3129-1 1
FeaTures DescripTion
n
Regulates VOUT Above, Below or Equal to VIN
The LTC®3129-1 is a high efficiency, 200mA buck-boost n
Wide VIN Range: 2.42V to 15V, 1.92V to 15V After
DC/DC converter with a wide VIN and VOUT range. It
Start-Up (Bootstrapped)
includes an accurate RUN pin threshold to allow predict- n
Fixed Output Voltage with Eight User-Selectable
able regulator turn-on and a maximum power point control
Settings from 2.5V to 15V
(MPPC) capability that ensures maximum power extraction n
200mA Output Current in Buck Mode
from non-ideal power sources such as photovoltaic panels. n
Single Inductor
The LTC3129-1 employs an ultralow noise, 1.2MHz PWM n
1.3µA Quiescent Current
switching architecture that minimizes solution footprint by n
Programmable Maximum Power Point Control allowing the use of tiny, low profile inductors and ceramic n
1.2MHz Ultralow Noise PWM capacitors. Built-in loop compensation and soft-start n
Current Mode Control simplify the design. For high efficiency operation at light n
Pin Selectable Burst Mode® Operation loads, automatic Burst Mode operation can be selected, n Up to 95% Efficiency reducing the quiescent current to just 1.3µA. To further n
Accurate RUN Pin Threshold reduce part count and improve light load efficiency, the n Power Good Indicator LTC3129-1 includes an internal voltage divider to provide n 10nA Shutdown Current eight selectable fixed output voltages. n Thermally Enhanced 3mm × 3mm QFN and 16-Lead MSOP Packages Additional features include a power good output, less than 10nA of shutdown current and thermal shutdown.
applicaTions
The LTC3129-1 is available in thermal y enhanced n Industrial Wireless Sensor Nodes 3mm × 3mm QFN and 16-lead MSOP packages. For an n Post-Regulator for Harvested Energy adjustable output voltage, see the functionally equivalent n Solar Panel Post-Regulator/Charger LTC3129. n Intrinsically Safe Power Supplies L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks n Wireless Microphones of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Avionics-Grade Wireless Headsets
Typical applicaTion Efficiency and Power Loss vs Load
22nF 22nF 10µH 100 1000 90 EFFICIENCY BST1 SW1 SW2 BST2 VOUT VIN 80 100 VIN VOUT 5V AT 2.42V TO 15V POWER LOSS (mW) 100mA V 10µF IN < VOUT 70 LTC3129-1 200mA VIN > VOUT 60 10 10µF RUN 50 POWER LOSS V MPPC PGOOD 40 1 CC EFFICIENCY (%) AA OR AAA 30 BATTERIES PWM 20 VIN = 2.5V 0.1 V VS1 V IN = 3.6V CC 10 VIN = 5V VS2 V V OUT = 5V IN = 15V 0 0.01 VS3 GND PGND 2.2µF 0.01 0.1 1 10 100 1000 OUTPUT CURRENT (mA) 3129 TA01b 31291 TA01a 31291fc For more information www.linear.com/LTC3129-1 1
