Datasheet Linear Technology LTC3100

LTC3100
1.5MHz Synchronous Dual
Channel DC/DC Converter
and 100mA LDO
DESCRIPTION FEATURES Extremely Compact Triple-Rail Solutio Burst Mode® Operation, I = 15µA
Q
n 1.5MHz Fixed Frequency Operatio Power Good Indicators
n 700mA Synchronous Step-Up DC/DC 0.65V to 5V VIN Range 1.5V to 5.25V VOUT Range 94% Peak Efficiency VIN > VOUT Operation Output Disconnect
n 250mA Synchronous Step-Down DC/DC 1.8V to 5.5V VIN Range 0.6V to 5.5V VOUT Range
n LDO (V Internally Tied to V
IN
BST) 0.6V to 5.25V VOUT Range 200mV Dropout Voltage at 100mA
n Available in a 16-Lead 3mm × 3mm QFN Package
n The LTC®3100 combines a high efficiency 700mA synchronous step-up converter, a 250mA synchronous stepdown converter and a 100mA LDO regulator. The LTC3100
features a wide input voltage range of 0.65V to 5V. The
step-down converter can be powered by the output of
the step-up converter or from a separate power source
between 1.8V and 5.5V. The LDO can also be used as a
sequencing switch on the output of the boost.
A switching frequency of 1.5MHz minimizes solution footprint by allowing the use of tiny, low profile inductors and
ceramic capacitors. The switching regulators use current
mode control and are internally compensated, reducing
external parts count. Each converter automatically transitions to Burst Mode operation to maintain high efficiency …