19-1774; Rev 0; 7/00
KIT
ATION
EVALU
BLE
AVAILA
High-Frequency, Regulated,
200mA, Inverting Charge Pump
General Description
Features
o
200mA Output Current
o
Up to 2MHz Switching Frequency
o
Small Capacitors (1碌F)
o
+2.7V to +5.5V Input Voltage Range
o
Adjustable Regulated Negative Output
(-2.5V to -V
IN
)
o
0.1碌A Logic-Controlled Shutdown
o
Low 0.05鈩?Output Resistance (in regulation)
o
Soft-Start and Foldback Current Limited
o
Short-Circuit and Thermal Shutdown Protected
o
8-Pin SO Package
MAX889
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
IN
.
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 0.1碌A logic-controlled
shutdown mode and is available in an 8-pin SO pack-
age. An evaluation kit, MAX889SEVKIT, is available.
________________________Applications
TFT Panels
Hard Disk Drives
Camcorders
Digital Cameras
Measurement Instruments
Battery-Powered Applications
PART
MAX889TESA
MAX889SESA
MAX889RESA
Ordering Information
TEMP.
RANGE
-40掳C to +85掳C
-40掳C to +85掳C
-40掳C to +85掳C
PIN-
SWITCHING
PACKAGE FREQUENCY
8 SO
8 SO
8 SO
2MHz
1MHz
0.5MHz
Typical Operating Circuit
INPUT +2.7V TO +5.5V
Pin Configuration
TOP VIEW
ON
OFF
SHDN
IN
FB
CAP+
MAX889
OUT
CAP-
AGND
GND
REGULATED
NEGATIVE
OUTPUT
(UP TO -1
脳
V
IN
,
UP TO 200mA)
IN
CAP+
GND
1
2
8
7
AGND
FB
SHDN
OUT
MAX889
3
6
5
CAP-
4
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.
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