LTC3104_15 Datasheet, PDF (1/20 Pages) Linear Technology – 2.6A Quiescent Current, 15V, 300mA Synchronous Step-Down DC/DC Converter and 10mA LDO

FEATURES
n _{Ultralow Quiescent Current: 2.6µA}
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 _{10mA Adjustable LDO}
n _{Available in Thermally Enhanced 3mm × 4mm ×}
0.75mm, 14-Pin DFN and 16-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}
LTC3104
2.6µA Quiescent Current,
15V, 300mA Synchronous
Step-Down DC/DC
Converter and 10mA LDO
DESCRIPTION
The LTC^®3104 is a high efficiency, monolithic synchronous
step-down converter using a current mode architecture
capable of supplying 300mA of output current. The LTC3104
includes an integrated, adjustable 10mA LDO to power
noise sensitive functions.
The LTC3104 offers two operational modes: automatic
Burst Mode operation and forced continuous mode allow-
ing the user 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
2.6µA, maximizing the efficiency for light loads. Selec-
tion of forced continuous mode provides very low noise
constant frequency, 1.2MHz operation.
Additionally, the LTC3104 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
V_IN
BST
ON
OFF
RUN
SW
LTC3104
FB
ON
OFF
RUNLDO PGOOD
10µF
MODE
V_INLDO
V_LDO
V_CC
FBLDO
1µF
GND
22nF 10µH
1.78M
12pF
665k
825k
412k
1.8V
10mA
4.7µF
3104 TA01a
2.2V
300mA
47µF
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)
3104 TA01b
3104f
1