The MAX889 inverting charge pump delivers a regulated negative output voltage at loads of up to 200mA. The device operates with inputs from 2.7V to 5.5V to produce an adjustable, regulated output from -2.5V to -VIN.
The MAX889 is available with an operating frequency of 2MHz (T version), 1MHz (S version), or 0.5MHz (R version). The higher switching frequency devices allow the use of smaller capacitors for space-limited applications. The lower frequency devices have lower quiescent current.
The MAX889 also features a 0.1μA logic-controlled shutdown mode and is available in an 8-pin SO package. An evaluation kit, MAX889SEVKIT, is available.

200mA Output Current
Up to 2MHz Switching Frequency
Small Capacitors (1μF)
+2.7V to +5.5V Input Voltage Range
Adjustable Regulated Negative Output (-2.5V to -VIN)
0.1μA Logic-Controlled Shutdown
Low 0.05Ω Output Resistance (in regulation)
Soft-Start and Foldback Current Limited
Short-Circuit and Thermal Shutdown Protected
8-Pin SO Package
Applications
Battery-Powered Applications
Camcorders
Digital Still Cameras
Hard Disk Drive
Measurement Instrumentation
TFT Panels