TS1909 Datasheet, PDF (1/6 Pages) Taiwan Semiconductor Company, Ltd – MicroPower VFM Boost DC to Dc Converter

TS1909
MicroPower VFM Boost DC to Dc Converter
SOT-25
Pin Definition:
1. Enable
2. Output
3. N.C
4. Ground
5. SW
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
V_OUT and convert it to a higher output voltage in the 2.5 to 5V range.
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
● Output Voltage Accuracy ±2.5%
● Output Current up to 100mA
● Low Ripple and Low Noise
● Very Low Start-up Voltage
● High Efficiency Typ. 87% @ V_OUT=5V
● Few External Components
Typical Application Circuit
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
Absolute Maximum Rating
Parameter
Symbol
Limit
Unit
V_IN Pin Voltage
V_IN
5.5
V
SW Voltage
V_SW
5.5
V
OUT Pin Voltage
Storage Temperature Range
Operating Junction Temperature Range
V_OUT
5.5
V
T_STG
-40 to +150
o_C
T_J
-20 to +100
o_C
Power Dissipation
Thermal Resistance from Junction to case
Thermal Resistance from Junction to ambient
P_D
( T_J-T_A ) / θ_JA
mW
θ_JC
110
o_C/W
θ_JA
250
o_C/W
Note: θ_JA is measured with the PCB copper area of approximately 1 inch (Multi-layer) that need connect to GND pin.
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Version: A10