Datasheet Texas Instruments TPS62745DSST — 数据表

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SLVSC68A – JUNE 2015 – REVISED JUNE 2015 TPS62745 Dual-cell Ultra Low IQ Step Down Converter for Low Power Wireless
Applications
1 Features 3 Description The TPS62745 is a high efficiency ultra low power
synchronous step down converter optimized for low
power wireless applications. It provides a regulated
output voltage consuming only 400-nA quiescent
current. The device operates from two rechargeable
Li-Ion batteries, Li-primary battery chemistries such
as Li-SOCl2, Li-SO2, Li-MnO2 or four to six cell
alkaline batteries. The input voltage range up to 10 V
allows also operation from a USB port and thin-film
solar modules. The output voltage is set with four
VSEL pins between 1.8 V and 3.3 V for TPS62745 or
1.3 V and 2.8 V for TPS627451. TPS62745 features
low output ripple voltage and low noise with a small
output capacitor. An internal input voltage switch
controlled by pin EN_VIN_SW connects the supply …