MAX889 Maxim, MAX889 Datasheet
MAX889
Manufacturer Part Number
MAX889
Description
High-Frequency / Regulated / 200mA / Inverting Charge Pump
Manufacturer
Maxim
Datasheet
1.MAX889.pdf
(8 pages)
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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 -V
The MAX889 is available with an operating frequency of
2MHz (T version), 1MHz (S version), or 0.5MHz (R ver-
sion). The higher switching frequency devices allow the
use of smaller capacitors for space-limited applica-
tions. The lower frequency devices have lower quies-
cent current.
The MAX889 also features a 0.1µA logic-controlled
shutdown mode and is available in an 8-pin SO pack-
age. An evaluation kit, MAX889SEVKIT, is available.
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.
19-1774; Rev 0; 7/00
________________________Applications
OFF
INPUT +2.7V TO +5.5V
TFT Panels
Hard Disk Drives
Camcorders
Digital Cameras
Measurement Instruments
Battery-Powered Applications
ON
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
SHDN
CAP+
CAP-
General Description
MAX889
AGND
IN
GND
OUT
FB
200mA, Inverting Charge Pump
(UP TO -1 × V
UP TO 200mA)
REGULATED
NEGATIVE
OUTPUT
IN
.
High-Frequency, Regulated,
IN
,
o 200mA Output Current
o Up to 2MHz Switching Frequency
o Small Capacitors (1µF)
o +2.7V to +5.5V Input Voltage Range
o Adjustable Regulated Negative Output
o 0.1µA Logic-Controlled Shutdown
o Low 0.05Ω Output Resistance (in regulation)
o Soft-Start and Foldback Current Limited
o Short-Circuit and Thermal Shutdown Protected
o 8-Pin SO Package
MAX889TESA
MAX889SESA
MAX889RESA
(-2.5V to -V
TOP VIEW
PART
IN
CAP+
CAP-
GND
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
)
IN
RANGE
1
2
4
TEMP.
3
Ordering Information
MAX889
SO
Pin Configuration
PACKAGE
8 SO
8 SO
8 SO
PIN-
6
8
7
5
AGND
FB
SHDN
OUT
Features
FREQUENCY
SWITCHING
2MHz
1MHz
0.5MHz
1
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