Datasheet STMicroelectronics ST662AC — Ficha de datos

ST662AB
ST662AC
DC-DC converter from 5V to 12V, 0.03A
for flash memory programming supply
Features
■ Output voltage: 12V ± 5% ■ Supply voltage range: 4.5V to 5.5V ■ Guaranteed output current up to 30mA ■ Very low quiescent current: 100mA ■ Logic controlled electronic shutdown: 1µA ■ Just capacitors needed (no inductor)
DIP-8 Description SO-8 The ST662A is a regulated charge pump DC-DC
converter. It provides 12V ± 5% output voltage to
program byte-wide flash memory, and can supply
30mA output current from input as low as 4.75V.
A logic controlled shut down pin that interfaces
directly with microprocessor reduces the supply
current to only 1µA. Table 1. Device summary
Packages
Order codes
DIP-8
ST662AB
ST662AC July 2007 SO-8 (tape & reel)
ST662ABD-TR ST662ACN Rev. 5 ST662ACD-TR 1/20
www.st.com 20 ST662AB -ST662AC Contents
1 Application circuit . 3 2 Pin configuration . 4 3 Maximum ratings 5 4 Electrical characteristics . 6 5 Typical performance characteristics 7 6 Description . 9 7 Application circuit 11
7.1 ST662A output performance 12 8 How to increase output current or output voltage capability . 13 9 Package mechanical data 15 10 Revision history . 19 2/20 ST662AB -ST662AC 1 Application circuit Figure 1. Typical application circuit Application circuit 3/20 Pin configuration ST662AB -ST662AC 2 Pin configuration Figure 2. Pin connections (top view) Table 2. Pin description Pin N° Symbol 1 C1-Negative terminal for the first charge pump capacitor 2 C1+ Positive terminal for the first charge pump capacitor 3 C2-Negative terminal for the second charge pump capacitor 4 C2+ Positive terminal for the second charge pump capacitor 5 VCC Supply voltage 6 VOUT 12V output voltage VOUT = VCC when in shutdown mode 7 GND Ground 8 SHDN 4/20 Name and function Active high C-MOS logic level shutdown input. SHDN is internally pulled up to VCC.
Connect to GND for normal operation. In Shutdown mode the charge pumps are turned …