Rainbow Electronics ICL7660 - Manual

_______________General Description
The MAX1044 and ICL7660 are monolithic, CMOS
switched-capacitor voltage converters that invert, dou-
ble, divide, or multiply a positive input voltage. They are
pin compatible with the industry-standard ICL7660 and
LTC1044. Operation is guaranteed from 1.5V to 10V with
no external diode over the full temperature range. They
deliver 10mA with a 0.5V output drop. The MAX1044
has a BOOST pin that raises the oscillator frequency
above the audio band and reduces external capacitor
size requirements.
The MAX1044/ICL7660 combine low quiescent current
and high efficiency. Oscillator control circuitry and four
power MOSFET switches are included on-chip.
Applications include generating a -5V supply from a
+5V logic supply to power analog circuitry. For applica-
tions requiring more power, the MAX660 delivers up to
100mA with a voltage drop of less than 0.65V.
________________________Applications
-5V Supply from +5V Logic Supply
Personal Communications Equipment
Portable Telephones
Op-Amp Power Supplies
EIA/TIA-232E and EIA/TIA-562 Power Supplies
Data-Acquisition Systems
Hand-Held Instruments
Panel Meters
____________________________Features
♦ Miniature µMAX Package
♦ 1.5V to 10.0V Operating Supply Voltage Range
♦ 98% Typical Power-Conversion Efficiency
♦ Invert, Double, Divide, or Multiply Input Voltages
♦ BOOST Pin Increases Switching Frequencies
(MAX1044)
♦ No-Load Supply Current: 200µA Max at 5V
♦ No External Diode Required for Higher-Voltage
Operation
______________Ordering Information
Ordering Information continued at end of data sheet.
* Contact factory for dice specifications.
MAX1044/ICL7660
Switched-Capacitor Voltage Converters
________________________________________________________________ Maxim Integrated Products 1
Call toll free 1-800-998-8800 for free samples or literature.
19-4667; Rev 1; 7/94
MAX1044
ICL7660
4
3
2
1
CAP-
GND
CAP+
(N.C.) BOOST
5
6
7
8
V
OUT
LV
OSC
V+
TOP VIEW
( ) ARE FOR ICL7660
DIP/SO/µMAX
TO-99
ICL7660
N.C.
CAP+
GND
CAP-
V
OUT
LV
OSC
V+ AND CASE
1
2
3
4
5
6
7
8
_________________Pin Configurations
NEGATIVE VOLTAGE CONVERTER
CAP+
CAP-
V+
V
OUT
GND
INPUT
SUPPLY
VOLTAGE
NEGATIVE
OUTPUT
VOLTAGE
MAX1044
ICL7660
__________Typical Operating Circuit
Dice*
8 SO
8 Plastic DIP
PIN-PACKAGE TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C MAX1044C/D
MAX1044CSA
MAX1044 CPA
PART
8 Plastic DIP -40°C to +85°C MAX1044EPA