Datasheet LTC3104 (Analog Devices)

LTC3104 2.6µA Quiescent Current, 15V, 300mA Synchronous Step-Down DC/DC Converter and 10mA LDO
FEATURES DESCRIPTION
n
Ultralow Quiescent Current: 2.6µA
The LTC®3104 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. The n
Wide VOUT Range: 0.6V to 13.8V
LTC3104 includes an integrated, adjustable 10mA LDO n
300mA Output Current
to power noise sensitive functions. n
User-Selectable Automatic Burst Mode
®
Operation
The LTC3104 offers two operational modes: automatic
or Forced Continuous Operation
Burst Mode operation and forced continuous mode allow- n Accurate and Programmable RUN Pin Threshold ing the user to optimize output voltage ripple, noise and n 1.2MHz Fixed Frequency PWM light load efficiency. With Burst Mode operation enabled, n Internal Compensation the typical DC input supply current at no load drops to n Power Good Status Output for VOUT 2.6µA, maximizing the efficiency for light loads. Selec- n 10mA Adjustable LDO tion of forced continuous mode provides very low noise n Available in Thermally Enhanced 3mm × 4mm × constant frequency, 1.2MHz operation. 0.75mm, 14-Lead DFN and 16-Lead MSOP Packages Additionally, the LTC3104 includes an accurate RUN com-
APPLICATIONS
parator, thermal overload protection, a power good output n and an integrated soft-start feature to guarantee that the Remote Sensor Networks n power system start-up is well controlled. Distributed Power Systems n Multicell Battery or SuperCap Regulator 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 Energy Harvesters owners. n Portable Instruments n Low Power Wireless Systems
TYPICAL APPLICATION Efficiency vs Output Current
100 3V TO 15V VIN BST 95 100 22nF ON 10µH 2.2V 90 OFF RUN SW 300mA POWER LOSS (mW) 1.78M 27pF 47µF LTC3104 85 FB 80 10 ON RUNLDO PGOOD 665k OFF 75 MODE V 70 INLDO EFFICIENCY (%) 65 1 10µF V 1.8V LDO 10mA V 825k 60 IN = 3V V V IN = 5V CC FBLDO 4.7µF 55 VIN = 10V GND 412k 1µF VIN = 15V 50 0.1 3104 TA01a 0.0001 0.001 0.01 0.1 1 OUTPUT CURRENT (A) 3104 TA01b 3104fa For more information www.linear.com/LTC3104 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts