TS1909

MicroPower VFM Boost DC to Dc Converter

1/1

Version: A10

SOT-25

General Description

The TS1909 is a high efficiency VFM Step-up DC/DC converter for small, low input voltage or battery powered

systems with ultra low quiescent supply current. The TS1909 accept a positive input voltage from start-up voltage to

The TS1909 combine ultra low quiescent supply current and high efficiency to give maximum battery life. The high

switching frequency and the internally limited peak inductor current permits the use of small, low cost inductors. Only

three external components are needed an inductor a diode and an output capacitor. The TS1909 is suitable to be

used in battery powered equipment where low noise, low ripple and ultra low supply current are required.

Typical applications are pagers, cameras & video camera, cellular telephones, wireless telephones, palmtop

computer, battery backup supplies, battery powered equipment.

Features

●

Very Low Supply Current 22µA (Typ.)

●

Maximum shutdown current <1µA

Ordering Information

Part No.

Package

Packing

TS1909CX5xx RF

SOT-25

3Kpcs / 7” Reel

Note: Where xx denotes voltage option.

Available output: 27=2.7V, 30=3V, 33=3.3V, 50=5V

Typical Application Circuit

Absolute Maximum Rating

Parameter

Symbol

Limit

Unit

5.5

V

SW Voltage

5.5

V

OUT Pin Voltage

5.5

V

Storage Temperature Range

-40 to +150

Operating Junction Temperature Range

-20 to +100

Power Dissipation

mW

Thermal Resistance from Junction to case

110

Thermal Resistance from Junction to ambient

250

Pin Definition:

1. Enable

2. Output

3. N.C

4. Ground

5. SW