器件名称: ST619LB_07
功能描述: DC-DC converter regulated 5 V charge pump
文件大小: 703.02KB 共16页
简 介:ST619LB
DC-DC converter regulated 5 V charge pump
Features
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Regulated 5 V ±4 % charge pump Output current guaranteed over temperature: 20 mA (VI ≥ 2 V), 30 mA (VI ≥ 3 V) No inductors; very low EMI noise Uses small, inexpensive capacitors Logic controlled 1 A max shut-down supply current Shut down disconnects load from input Available in SO-8 and DIP-8 packages
SO-8
Description
The ST619LB is a step-up charge pump DC-DC converter which delivers a regulated 5 V ±4 % output at 30 mA and over temperature. The input voltage range is 2 V to 3.6 V (two battery cells). It requires only four external capacitor: two 0.22 F flying capacitors, and 10 F capacitors at the input and output. Low operating supply current (typ. 200 A) make the device ideal for small, portable and battery powered applications. When shut down the load is disconnected from the input and the supply current is typically 0.02 A. The ST619LB is available in SO-8 package.
Table 1.
Device summary
Order codes ST619LB SO-8 (tape & reel) ST619LBDR
November 2007
Rev. 4
1/16
www.st.com 16
ST619LB
Contents
1 2 3 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Operating principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Shut down mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . ……
