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Part: ICL7662M
Category:
Power Management
-> DC-DC Converters
Description: CMOS Voltage Converter
Company: Intersil Corporation
Datasheet: Download ICL7662M datasheet File size : 338 kB
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ICL7662
D a t a Sheet A p r i l 1999 Fi l e Number 31 81. 3
CMOS Voltage Converter
The Intersil ICL7662 is a monolithic high-voltage CMOS power supply circuit which offers unique performance advantages over previously available devices. The ICL7662 performs supply voltage conversion from positive to negative for an input range of +4.5V to +20.0V, resulting in complementary output voltages of -4.5V to -20V. Only 2 noncritical external capacitors are needed for the charge pump and charge reservoir functions. The ICL7662 can also function as a voltage doubler, and will generate output voltages up to +38.6V with a +20V input. Contained on chip are a series DC power supply regulator, RC oscillator, voltage level translator, four output power MOS switches. A unique logic element senses the most negative voltage in the device and ensures that the output N-Channel switch source-substrate junctions are not forward biased. This assures latchup free operation. The oscillator, when unloaded, oscillates at a nominal frequency of 10kHz for an input supply voltage of 15.0V. This frequency can be lowered by the addition of an external capacitor to the "OSC" terminal, or the oscillator may be overdriven by an external clock. The "LV" terminal may be tied to GROUND to bypass the internal series regulator and improve low voltage (LV) operation. At medium to high voltages (+10V to +20V), the LV pin is left floating to prevent device latchup.
Features
ˇ No External Diode Needed Over Entire Temperature Range ˇ Pin Compatible With ICL7660 ˇ Simple Conversion of +15V Supply to -15V Supply ˇ Simple Voltage Multiplication (VOUT = (-)nVIN ) ˇ 99.9% Typical Open Circuit Voltage Conversion Efficiency ˇ 96% Typical Power Efficiency ˇ Wide Operating Voltage Range 4.5V to 20.0V ˇ Easy to Use - Requires Only 2 External Non-Critical Passive Components
Applications
ˇ On Board Negative Supply for Dynamic RAMs ˇ Localized ľProcessor (8080 Type) Negative Supplies ˇ Inexpensive Negative Supplies ˇ Data Acquisition Systems ˇ Up to -20V for Op Amps
Pinouts
ICL7662CBD- 0 (SOIC) TOP VIEW
TEST 1 NC 2 CAP+ 3 NC 4 GND 5 NC 6 CAP - 7 14 V + 13 OSC 12 NC 11 LV 10 NC 9 NC 8 VOUT
ICL7662CBD AND IBD (SOIC) TOP VIEW
NC 1 TEST 2 NC 3 CAP + 4 G ND 5 NC 6 NC 7 14 V + 13 NC 12 OSC 11 LV 10 NC 9 VOUT 8 CAP CAP+ 2 TEST
ICL7662 (CAN) TOP VIEW
V+ 8 1 7 OSC
6
LV
G ND
3 4
5
VOUT
ICL7662 (PDIP) TOP VIEW
TEST CAP+ GND CAP 1 2 3 4 8 V+ 7 OSC 6 LV 5 VOUT
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Š Intersil Americas Inc. 2002. All Rights Reserved
ICL7662 Ordering Information
PART NUMBER ICL7662CTV ICL7662CPA ICL7662CBD-0 ICL7662CBD ICL7662ITV ICL7662IP A ICL7662IB D ICL7662MTV (Note 1) NOTE: 1. Add /883 to part number if /883B processing is required. TEMP. RANGE (oC) 0 to 70 0 to 70 0 to 70 0 to 70 - 40 to 85 - 40 to 85 - 40 to 85 - 55 to 125 PACKA GE PKG. NO.
8 Pin Metal Can T8.C 8 Ld PDIP 14 Ld SOIC (N) 14 Ld SOIC (N) E8.3 M14.15 M14.15
8 Pin Metal Can T8.C 8 Ld PDIP 14 Ld SOIC (N) E8.3 M14.15
8 Pin Metal Can T8.C
Functional Block Diagram
V+
CAP + RC OSCILLATOR
÷2
VOLTAGE LEVEL TRANSLA TOR
CAP -
TEST VOUT N OSC LV
P
VOLTAGE REGULATOR
LOGIC NETWORK
2
ICL7662
Absolute Maximum Ratings
Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22V Oscillator Input Voltage . . . . . . . . -0.3V to (V+ +0.3V) for V+ 10V Curr ent Into LV (Note 2). . . . . . . . . . . . . . . . . . . . 20ľA for V+ > 10V Output Short Duration . . . . . . . . . . . . . . . . . . . . . . . . . . .Continuous
Thermal Information
Thermal Resistance (Typical, Note 3) JA (oC/W) JC (oC/W) PDIP Package . . . . . . . . . . . . . . . . . . . Plastic SOIC Package . . . . . . . . . . . . . Metal Can. . . . . . . . . . . . . . . . . . . . . . . Maximum Lead Temperature (Soldering, 10s) (SOIC - Lead Tips Only) 150 N/A 120 N/A 156 68 . . . . . . . . . . . . 300oC
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES : 2. Connecting any terminal to voltages greater than V+ or less than GND may cause destructive latchup. It is recommended that no inputs from sources operating from external supplies be applied prior to "power up" of ICL7660S. 3. JA is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
P ARAME TER Supply Voltage Range - Lo Supply Voltage Range - Hi Supply Current
V+ = 15V, TA = 25oC, COSC = 0, Unless Otherwise Specified. Refer to Figure 14. SYMBOL V+L V+H I+ TEST CONDITIONS RL = 10k, LV = GND RL = 10k, LV = Open RL = , LV = Open Min < TA < Max Min < TA < Max TA = 25oC 0oC < TA < 70oC -40oC < TA < 85oC -55oC < TA < 125oC TA = 25oC 0oC < TA < 70oC - 40oC < TA < 85oC -55oC < TA < 125oC TA = 25oC 0oC < TA < 70oC - 40oC < TA < 85oC -55oC < TA < 125oC TA = 25oC 0oC < TA < 70oC - 40oC < TA < 85oC -55oC < TA < 125oC MIN 4.5 9 RL = 2k TA = 25oC Min < TA < Max 93 90 97 TYP 0.25 0.30 0.40 60 70 90 20 25 30 125 150 200 10 96 95 99.9 0.5 4.0 M AX 11 20 0.60 0.85 1.0 100 120 150 150 200 250 200 250 350 UNITS V V mA mA mA ľA ľA ľA k Hz % % % ľA ľA
Output Source Resistance
RO
IO = 20mA, LV = Open
Supply Current
I+
V+ = 5V, RL = , LV = GND
Output Source Resistance
RO
V+ = 5V, IO = 3mA, LV = GND
Oscillator Frequency Power Efficiency
FOSC PEFF
Voltage Conversion Efficiency Oscillator Sink or Source Current NOTE:
VoE f IOSC
RL =
Min < TA < Max
V+ = 5V (VOSC = 0V to +5V) V+ = 15V (V OSC = +5V to +15V)
4. Pin 1 is a Test pin and is not connected in normal use. When the TEST pin is connected to V+, an internal transmission gate disconnects any external parasitic capacitance from the oscillator which would otherwise reduce the oscillator frequency from its nominal value.
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