LTC1517-5

Features:

Ultralow Power: I_CC = 6A Typ
Short-Circuit/Thermal Protected
5V ±4% Regulated Output
V_IN Range: 2.7V to 5V
Output Current: 10mA (V_IN  2.7V)
                             20mA (V_IN 3V)
No Inductors
Ultrasmall Application Circuit (0.045in²)
800kHz Switching Frequency
Available in 5-Pin SOT-23


Application

Cellular Telephones
Battery-Operated Equipment
Local Power Supplies
Handheld Instruments
PCMCIA Supplies


Pinout




Specifications

V_IN to GND........................................................ 0.3V to 6V
V_OUT to GND .................................................... 0.3V to 6V
V_OUT Short-Circuit Duration ............................. Indefinite
Operating Temperature Range:
    Commercial (Note 2) .................................... 0°C to 70°C
Storage Temperature Range ........................... 65°C to 150°C
Lead Temperature (Soldering, 10 sec)............. 300°C


Description

The LTC^®1517-5 is a micropower charge pump DC/DC converter that produces a regulated 5V output. The input voltage range is 2.7V to 5V. Extremely low operating current (typically 6A with no load) and low external parts count (one 0.1F flying capacitor and two small bypass capacitors at V_IN and V_OUT) make the part ideally suited for small, light load battery-powered applications. The total printed circuit board area of the application circuit shown below is only 0.045in².

The part operates as a Burst Mode^TM switched-capacitor voltage doubler to produce a regulated output. The part has thermal shutdown capability and can survive a continuous short circuit from V_OUT to GND. The LTC1517-5 is available in a 5-pin SOT-23 package.