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ICL7660, MAX1044
Switched-Capacitor Voltage Converters
20mA Charge Pump with Industry Standard Pinout
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Status
| Part Number |
Status |
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ICL7660
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Active: In Production. See Ordering Information for details. |
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MAX1044
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Active: In Production. |
Description
The MAX1044 and ICL7660 are monolithic, CMOS switched-capacitor voltage converters that invert, double, 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 applications requiring more power, the MAX660 delivers up to 100mA with a voltage drop of less than 0.65V.
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Data Sheet
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Key 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
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Applications/Uses
- -5V Supply from +5V Logic Supply
- Data Acquisition
- EIA/TIA-232E and EIA/TIA-562 Power Supplies
- Handheld Instruments (PDAs, Palmtops)
- Op-Amp Power Supplies
- Panel Meters
- Personal Communications Equipment
- Portable Telephones
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Key Specifications:
| Charge Pumps |
| Part Number |
Topology |
VIN
(V) |
VIN
(V) |
ICC
(mA) |
Unadj. VOUT
(V) |
IOUT
(A) |
Oper. Freq.
(kHz) |
Industry Qualified |
Oper. Temp.
(°C) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| min |
max |
max |
typ |
max w/pins |
See Notes |
| ICL7660 |
| Doubler | | Inverter | | Unregulated |
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1.5 |
10 |
0.175 |
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0.02 |
10 |
MIL-STD-883B |
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15.6 |
$1.11 @1k |
| MAX1044 |
0.2 |
20 |
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30.9 |
$1.15 @1k |
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See All Charge Pumps (45)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
 Typical Operating Circuit
Didn't Find What You Need?
Information Index
Document Ref.: 19-4667
Rev 1;
1994-07-28
This page last modified: 2007-05-29
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