18V, High Efficiency, DC-DC Step-Up Converter AS1345 – 1
AS1345
18V, High Efficiency, DC-DC Step-Up
Converter
The AS1345 high efficiency DC-DC step-up converter contains
an internal N-channel and an internal P-channel output
isolation switch.
The device operates from a 2.9V to 5.0V supply and can boost
voltages up to 18V.
A hysteretic control scheme is used to provide the highest
operating efficiency over a wide range of input and output load
conditions. The internal MOSFET switches reduce the external
component count and a high switching frequency allows the
use of tiny surface mount components.
The AS1345 employ a factory set current limit to reduce ripple
and external component size in low output current applications.
With a 500mA current limit the AS1345 is capable of providing
20mA @ 18V output.
Figure AS1345 – 1:
Available Products
For order related information, please refer to “Ordering
Information” on page 24.
Built-in safety features protect the internal switches and output
components from fault conditions. Additional power-saving
attributes include a very low quiescent current and a true
shutdown mode.
Figure AS1345 – 2:
Key Benefits and Features
Devices Peak Coil Current Output
AS1345A 100mA adjustable or fixed
AS1345B 200mA adjustable or fixed
AS1345C 350mA adjustable or fixed
AS1345D 500mA adjustable or fixed
Benefits Features
Supports Lithium primary and re-chargeable
batteries
Input Voltage Range: 2.9V to 5.0V
Supports a variety of end applications Adjustable Output Voltage Range: 5.0V to 18V
