LTC3103_15 Datasheet, PDF (1/20 Pages) Linear Technology – 1.8A Quiescent Current, 15V, 300mA Synchronous Step-Down DC/DC Converter

FEATURES
n _{Ultralow Quiescent Current: 1.8µA}
n _{Synchronous Rectification: Efficiency Up to 95%}
n _{Wide VIN Range: 2.5V to 15V}
n _{Wide VOUT Range: 0.6V to 13.8V}
n _{300mA Output Current}
n _{User-Selectable Automatic Burst Mode}^® _{or Forced}
Continuous Operation
n _{Accurate and Programmable RUN Pin Threshold}
n _{1.2MHz Fixed Frequency PWM}
n _{Internal Compensation}
n _{Power Good Status Output for VOUT}
n _{Available in Thermally Enhanced 3mm × 3mm ×}
0.75mm, 10-Pin DFN and 10-Pin MSOP Packages
APPLICATIONS
n _{Remote Sensor Networks}
n _{Distributed Power Systems}
n _{Multicell Battery or SuperCap Regulator}
n _{Energy Harvesters}
n _{Portable Instruments}
n _{Low Power Wireless Systems}
LTC3103
1.8µA Quiescent Current,
15V, 300mA Synchronous
Step-Down DC/DC
Converter
DESCRIPTION
The LTC^®3103 is a high efficiency, monolithic synchronous
step-down converter using a current mode architecture
capable of supplying 300mA of output current.
The LTC3103 offers two operational modes: automatic
Burst Mode operation and forced continuous mode allow-
ing the user the ability to optimize output voltage ripple,
noise and light load efficiency. With Burst Mode operation
enabled, the typical DC input supply current at no load
drops to 1.8µA maximizing the efficiency for light loads.
Selection of forced continuous mode provides very low
noise constant frequency, 1.2MHz operation.
Additionally, the LTC3103 includes an accurate RUN com-
parator, thermal overload protection, a power good output
and an integrated soft-start feature to guarantee that the
power system start-up is well controlled.
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
owners.
TYPICAL APPLICATION
3V TO 15V
10µF
V_IN
BST
MODE SW
LTC3103
RUN PGOOD
V_CC
FB
GND
1µF
0.022µF 10µH
2.2V
300mA
1.78M
12pF
665k
47µF
3103 TA01a
Efficiency vs Output Current
100
95
100
90
85
80
10
75
70
65
60
55
50
0.0001
1
0.001
0.01
V_IN = 3V
V_IN = 5V
V_IN = 10V
V_IN = 15V
0.1
0.1
1
OUTPUT CURRENT (A)
3103 TA01b
3103f
1