Datasheet LTC3129 (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 / 1.6 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
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LTC3129 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 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 includes
Start-Up (Bootstrapped)
an accurate RUN pin threshold to allow predictable regula- n
Wide VOUT Range: 1.4V to 15.75V
tor turn-on and a maximum power point control (MPPC) n
200mA Output Current in Buck Mode
capability that ensures maximum power extraction from n
Single Inductor
non-ideal power sources such as photovoltaic panels. n
1.3µA Quiescent Current
The LTC3129 employs an ultralow noise, 1.2MHz PWM n Programmable Maximum Power Point Control switching architecture that minimizes solution footprint by n 1.2MHz Ultralow Noise PWM allowing the use of tiny, low profile inductors and ceramic n Current Mode Control capacitors. Built-in loop compensation and soft-start n Pin Selectable Burst Mode® Operation simplify the design. For high efficiency operation at light n Up to 95% Efficiency loads, automatic Burst Mode operation can be selected, n Accurate RUN Pin Threshold reducing the quiescent current to just 1.3µA. n Power Good Indicator n 10nA Shutdown Current Additional features include a power good output, less than n Thermally Enhanced 3mm × 3mm QFN and 10nA of shutdown current and thermal shutdown. 16-Lead MSOP Packages The LTC3129 is available in thermally enhanced 3mm × 3mm QFN and 16-lead MSOP packages. For fixed output
applicaTions
voltage options, see the functionally equivalent LTC3129-1, n Industrial Wireless Sensor Nodes which eliminates the need for an external feedback divider. n Post-Regulator for Harvested Energy L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks n Solar Panel Post-Regulator/Charger and PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Intrinsically Safe Power Supplies n Wireless Microphones n Avionics-Grade Wireless Headsets
Typical applicaTion
22nF 22nF 10µH
Efficiency and Power Loss vs Load
100 1000 5V AT 200mA, VIN > 5V 90 EFFICIENCY 2.42V TO 15V BST1 SW1 SW2 BST2 5V AT 100mA, VIN < 5V V 80 100 IN VIN VOUT VOUT POWER LOSS (mW) 70 LTC3129 10µF 10pF RUN 3.32M 60 10 10µF 50 POWER LOSS V MPPC FB CC 40 1 EFFICIENCY (%) PGOOD 30 PWM 1.02M 20 VIN = 2.5V 0.1 V V CC IN = 3.6V 10 VIN = 5V V V OUT = 5V IN = 15V 0 0.01 GND PGND 2.2µF 0.01 0.1 1 10 100 1000 OUTPUT CURRENT (mA) 3129 TA01b 3129 TA01a 3129fc For more information www.linear.com/LTC3129 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
FeaTures DescripTion
n
Regulates VOUT Above, Below or Equal to VIN
The LTC®3129 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 includes
Start-Up (Bootstrapped)
an accurate RUN pin threshold to allow predictable regula- n
Wide VOUT Range: 1.4V to 15.75V
tor turn-on and a maximum power point control (MPPC) n
200mA Output Current in Buck Mode
capability that ensures maximum power extraction from n
Single Inductor
non-ideal power sources such as photovoltaic panels. n
1.3µA Quiescent Current
The LTC3129 employs an ultralow noise, 1.2MHz PWM n Programmable Maximum Power Point Control switching architecture that minimizes solution footprint by n 1.2MHz Ultralow Noise PWM allowing the use of tiny, low profile inductors and ceramic n Current Mode Control capacitors. Built-in loop compensation and soft-start n Pin Selectable Burst Mode® Operation simplify the design. For high efficiency operation at light n Up to 95% Efficiency loads, automatic Burst Mode operation can be selected, n Accurate RUN Pin Threshold reducing the quiescent current to just 1.3µA. n Power Good Indicator n 10nA Shutdown Current Additional features include a power good output, less than n Thermally Enhanced 3mm × 3mm QFN and 10nA of shutdown current and thermal shutdown. 16-Lead MSOP Packages The LTC3129 is available in thermally enhanced 3mm × 3mm QFN and 16-lead MSOP packages. For fixed output
applicaTions
voltage options, see the functionally equivalent LTC3129-1, n Industrial Wireless Sensor Nodes which eliminates the need for an external feedback divider. n Post-Regulator for Harvested Energy L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks n Solar Panel Post-Regulator/Charger and PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Intrinsically Safe Power Supplies n Wireless Microphones n Avionics-Grade Wireless Headsets
Typical applicaTion
22nF 22nF 10µH
Efficiency and Power Loss vs Load
100 1000 5V AT 200mA, VIN > 5V 90 EFFICIENCY 2.42V TO 15V BST1 SW1 SW2 BST2 5V AT 100mA, VIN < 5V V 80 100 IN VIN VOUT VOUT POWER LOSS (mW) 70 LTC3129 10µF 10pF RUN 3.32M 60 10 10µF 50 POWER LOSS V MPPC FB CC 40 1 EFFICIENCY (%) PGOOD 30 PWM 1.02M 20 VIN = 2.5V 0.1 V V CC IN = 3.6V 10 VIN = 5V V V OUT = 5V IN = 15V 0 0.01 GND PGND 2.2µF 0.01 0.1 1 10 100 1000 OUTPUT CURRENT (mA) 3129 TA01b 3129 TA01a 3129fc For more information www.linear.com/LTC3129 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
