19-4667; Rev 1; 7/94
S w it c h e d -Ca p a c it o r Vo lt a g e Co n ve rt e rs
MAX14/ICL760
_______________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
♦ Miniature µMAX Package
The MAX1044 a nd ICL7660 a re 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.
♦ 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
The MAX1044/ICL7660 combine low quiescent current
and high efficiency. Oscillator control circuitry and four
p owe r MOSFET s witc he s a re inc lud e d on-c hip .
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.
Operation
______________Ord e rin g In fo rm a t io n
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
8 Plastic DIP
8 SO
MAX1044CPA
MAX1044CSA
MAX1044C/D
MAX1044EPA
Dice*
________________________Ap p lic a t io n s
-5V Supply from +5V Logic Supply
Personal Communications Equipment
Portable Telephones
8 Plastic DIP
Ordering Information continued at end of data sheet.
* Contact factory for dice specifications.
_________________P in Co n fig u ra t io n s
Op-Amp Power Supplies
EIA/TIA-232E and EIA/TIA-562 Power Supplies
Data-Acquisition Systems
TOP VIEW
Hand-Held Instruments
(N.C.) BOOST
CAP+
1
2
3
4
8
7
6
5
V+
Panel Meters
OSC
LV
MAX1044
ICL7660
GND
__________Typ ic a l Op e ra t in g Circ u it
CAP-
V
OUT
DIP/SO/µMAX
INPUT
SUPPLY
V+ AND CASE
V+
CAP+
VOLTAGE
8
N.C.
2
OSC
1
7
MAX1044
ICL7660
LV
CAP+
6
ICL7660
CAP-
GND
NEGATIVE
OUTPUT
VOLTAGE
V
OUT
V
GND
OUT
5
3
4
CAP-
NEGATIVE VOLTAGE CONVERTER
( ) ARE FOR ICL7660
TO-99
________________________________________________________________ Maxim Integrated Products
1
Ca ll t o ll fre e 1 -8 0 0 -9 9 8 -8 8 0 0 fo r fre e s a m p le s o r lit e ra t u re .