Datasheet LTC3103 (Analog Devices)
| Hersteller | Analog Devices |
| Beschreibung | 1.8μA Quiescent Current, 15V, 300mA Synchronous Step-Down DC/DC Converter |
| Seiten / Seite | 20 / 1 — FEATURES. DESCRIPTION. Ultralow Quiescent Current: 1.8µA. Synchronous … |
| Dateiformat / Größe | PDF / 442 Kb |
| Dokumentensprache | Englisch |
FEATURES. DESCRIPTION. Ultralow Quiescent Current: 1.8µA. Synchronous Rectification: Efficiency Up to 95%
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LTC3103 1.8µA Quiescent Current, 15V, 300mA Synchronous Step-Down DC/DC Converter
FEATURES DESCRIPTION
n
Ultralow Quiescent Current: 1.8µA
The LTC®3103 is a high efficiency, monolithic synchronous n
Synchronous Rectification: Efficiency Up to 95%
step-down converter using a current mode architecture n
Wide VIN Range: 2.5V to 15V
capable of supplying 300mA of output current. n
Wide VOUT Range: 0.6V to 13.8V
The LTC3103 offers two operational modes: automatic n
300mA Output Current
Burst Mode operation and forced continuous mode allow- n
User-Selectable Automatic Burst Mode
®
or Forced
ing the user the ability to optimize output voltage ripple,
Continuous Operation
noise and light load efficiency. With Burst Mode operation n Accurate and Programmable RUN Pin Threshold enabled, the typical DC input supply current at no load n 1.2MHz Fixed Frequency PWM drops to 1.8µA maximizing the efficiency for light loads. n Internal Compensation Selection of forced continuous mode provides very low n Power Good Status Output for VOUT noise constant frequency, 1.2MHz operation. n Available in Thermally Enhanced 3mm × 3mm × 0.75mm, 10-Pin DFN and 10-Pin MSOP Packages Additionally, the LTC3103 includes an accurate RUN com- parator, thermal overload protection, a power good output
APPLICATIONS
and an integrated soft-start feature to guarantee that the n power system start-up is well controlled. Remote Sensor Networks n Distributed Power Systems L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective n Multicell Battery or SuperCap Regulator owners. n Energy Harvesters n Portable Instruments n Low Power Wireless Systems
TYPICAL APPLICATION Efficiency vs Output Current
100 3V TO 15V VIN BST 95 100 0.022µF 10µH MODE SW 2.2V 90 300mA LTC3103 POWER LOSS (mW) 85 RUN PGOOD 80 10 10µF 1.78M VCC FB 75 GND 27pF 70 47µF EFFICIENCY (%) 65 1 1µF 665k V 60 IN = 3V VIN = 5V 3103 TA01a 55 VIN = 10V VIN = 15V 50 0.1 0.0001 0.001 0.01 0.1 1 OUTPUT CURRENT (A) 3103 TA01b 3103fa For more information www.linear.com/LTC3103 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
FEATURES DESCRIPTION
n
Ultralow Quiescent Current: 1.8µA
The LTC®3103 is a high efficiency, monolithic synchronous n
Synchronous Rectification: Efficiency Up to 95%
step-down converter using a current mode architecture n
Wide VIN Range: 2.5V to 15V
capable of supplying 300mA of output current. n
Wide VOUT Range: 0.6V to 13.8V
The LTC3103 offers two operational modes: automatic n
300mA Output Current
Burst Mode operation and forced continuous mode allow- n
User-Selectable Automatic Burst Mode
®
or Forced
ing the user the ability to optimize output voltage ripple,
Continuous Operation
noise and light load efficiency. With Burst Mode operation n Accurate and Programmable RUN Pin Threshold enabled, the typical DC input supply current at no load n 1.2MHz Fixed Frequency PWM drops to 1.8µA maximizing the efficiency for light loads. n Internal Compensation Selection of forced continuous mode provides very low n Power Good Status Output for VOUT noise constant frequency, 1.2MHz operation. n Available in Thermally Enhanced 3mm × 3mm × 0.75mm, 10-Pin DFN and 10-Pin MSOP Packages Additionally, the LTC3103 includes an accurate RUN com- parator, thermal overload protection, a power good output
APPLICATIONS
and an integrated soft-start feature to guarantee that the n power system start-up is well controlled. Remote Sensor Networks n Distributed Power Systems L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective n Multicell Battery or SuperCap Regulator owners. n Energy Harvesters n Portable Instruments n Low Power Wireless Systems
TYPICAL APPLICATION Efficiency vs Output Current
100 3V TO 15V VIN BST 95 100 0.022µF 10µH MODE SW 2.2V 90 300mA LTC3103 POWER LOSS (mW) 85 RUN PGOOD 80 10 10µF 1.78M VCC FB 75 GND 27pF 70 47µF EFFICIENCY (%) 65 1 1µF 665k V 60 IN = 3V VIN = 5V 3103 TA01a 55 VIN = 10V VIN = 15V 50 0.1 0.0001 0.001 0.01 0.1 1 OUTPUT CURRENT (A) 3103 TA01b 3103fa For more information www.linear.com/LTC3103 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts