Datasheet MAX889 (Maxim)

19-1774; Rev 0; 7/00
EVALUATION KIT AVAILABLE High-Frequency, Regulated, 200mA, Inverting Charge Pump MAX889 General Description Features
The MAX889 inverting charge pump delivers a regulated ♦
200mA Output Current
negative output voltage at loads of up to 200mA. The device operates with inputs from 2.7V to 5.5V to produce ♦
Up to 2MHz Switching Frequency
an adjustable, regulated output from -2.5V to -VIN. ♦
Small Capacitors (1µF)
The MAX889 is available with an operating frequency of ♦
+2.7V to +5.5V Input Voltage Range
2MHz (T version), 1MHz (S version), or 0.5MHz (R ver- sion). The higher switching frequency devices allow the ♦
Adjustable Regulated Negative Output
use of smaller capacitors for space-limited applica-
(-2.5V to -VIN)
tions. The lower frequency devices have lower quies- ♦
0.1µA Logic-Controlled Shutdown
cent current. The MAX889 also features a 0.1µA logic-controlled ♦
Low 0.05
Ω
Output Resistance (in regulation)
shutdown mode and is available in an 8-pin SO pack- ♦
Soft-Start and Foldback Current Limited
age. An evaluation kit, MAX889SEVKIT, is available. ♦
Short-Circuit and Thermal Shutdown Protected
♦
8-Pin SO Package ________________________Applications Ordering Information
TFT Panels
TEMP. PIN- SWITCHING
Hard Disk Drives
PART RANGE PACKAGE FREQUENCY
Camcorders MAX889TESA -40°C to +85°C 8 SO 2MHz Digital Cameras MAX889SESA -40°C to +85°C 8 SO 1MHz MAX889RESA -40°C to +85°C 8 SO 0.5MHz Measurement Instruments Battery-Powered Applications
Typical Operating Circuit Pin Configuration
INPUT +2.7V TO +5.5V TOP VIEW ON IN REGULATED IN 1 8 AGND FB OFF SHDN NEGATIVE OUTPUT CAP+ 2 7 FB CAP+ MAX889 (UP TO -1 × VIN, MAX889 UP TO 200mA) GND 3 6 SHDN OUT CAP- CAP- 4 5 OUT AGND GND
SO ________________________________________________________________ Maxim Integrated Products 1 For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.