LM2660M/NOPB National Semiconductor, LM2660M/NOPB Datasheet

IC MULTI CONFIG .1A 8SOIC

LM2660M/NOPB

Manufacturer Part Number
LM2660M/NOPB
Description
IC MULTI CONFIG .1A 8SOIC
Manufacturer
National Semiconductor
Type
Switched Capacitor (Charge Pump), Divider, Doubler, Invertingr
Datasheet

Specifications of LM2660M/NOPB

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Current - Output
100mA
Frequency - Switching
40kHz
Voltage - Input
1.5 ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Power - Output
735mW
Primary Input Voltage
5V
No. Of Outputs
1
Output Current
100mA
No. Of Pins
8
Operating Temperature Range
-40°C To +85°C
Msl
MSL 1 - Unlimited
Current Rating
100A
Filter Terminals
SMD
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Other names
*LM2660M
*LM2660M/NOPB
LM2660M
© 2004 National Semiconductor Corporation
LM2660/LM2661
Switched Capacitor Voltage Converter
General Description
The LM2660/LM2661 CMOS charge-pump voltage con-
verter inverts a positive voltage in the range of 1.5V to 5.5V
to the corresponding negative voltage. The LM2660/LM2661
uses two low cost capacitors to provide 100 mA of output
current without the cost, size, and EMI related to inductor
based converters. With an operating current of only 120 µA
and operating efficiency greater than 90% at most loads, the
LM2660/LM2661 provides ideal performance for battery
powered systems. The LM2660/LM2661 may also be used
as a positive voltage doubler.
The oscillator frequency can be lowered by adding an exter-
nal capacitor to the OSC pin. Also, the OSC pin may be used
to drive the LM2660/LM2661 with an external clock. For
LM2660, a frequency control (FC) pin selects the oscillator
frequency of 10 kHz or 80 kHz. For LM2661, an external
shutdown (SD) pin replaces the FC pin. The SD pin can be
used to disable the device and reduce the quiescent current
to 0.5 µA. The oscillator frequency for the LM2661 is 80 kHz.
Basic Application Circuits
Voltage Inverter
DS012911
01291103
Splitting V
IN
Features
n Inverts or doubles input supply voltage
n Narrow SO-8 and Mini SO-8 Package
n 6.5Ω typical output resistance
n 88% typical conversion efficiency at 100 mA
n (LM2660) selectable oscillator frequency: 10 kHz/80 kHz
n (LM2661) low current shutdown mode
Applications
n Laptop computers
n Cellular phones
n Medical instruments
n Operational amplifier power supplies
n Interface power supplies
n Handheld instruments
in Half
Positive Voltage Doubler
01291126
September 1999
www.national.com
01291104

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LM2660M/NOPB Summary of contents

Page 1

... The oscillator frequency for the LM2661 is 80 kHz. Basic Application Circuits Voltage Inverter © 2004 National Semiconductor Corporation Features n Inverts or doubles input supply voltage n Narrow SO-8 and Mini SO-8 Package n 6.5Ω ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (V+ to GND, or GND to OUT) LV (OUT − 0.3V) to (GND + 3V) FC, OSC The least negative of (OUT − 0.3V) or (V+ − 6V) to (V+ + 0.3V) ...

Page 3

Test Circuits Typical Performance Characteristics (Circuit of Figure 1) Supply Current vs Supply Voltage 01291107 Output Source Resistance vs Temperature 01291110 01291105 FIGURE 1. LM2660 and LM2661 Test Circuits Supply Current vs Oscillator Frequency 01291108 Efficiency vs Load Current 01291111 ...

Page 4

Typical Performance Characteristics Efficiency vs Oscillator Frequency 01291113 Oscillator Frequency vs Supply Voltage (FC = V+) 01291116 Oscillator Frequency vs Temperature (FC = Open) www.national.com (Circuit of Figure 1) (Continued) Output Voltage vs Oscillator Frequency 01291114 Oscillator Frequency vs Supply ...

Page 5

Connection Diagrams 8-Lead SO (M) or Mini SO (MM) 01291101 Order Number LM2660M, LM2661M, LM2660MM or LM2661MM Ordering Information Order Number Package Number LM2660M M08A LM2660MX M08A LM2660MM MUA08A LM2660MMX MUA08A LM2661M M08A LM2661MX M08A LM2661MM MUA08A LM2661MMX MUA08A Note ...

Page 6

Pin Description Pin Name Voltage Inverter 1 FC Frequency control for internal oscillator: (LM2660 open kHz (typ); OSC kHz (typ); OSC FC has no effect when OSC pin is ...

Page 7

Application Information The peak-to-peak output voltage ripple is determined by the oscillator frequency, and the capacitance and ESR of the output capacitor Again, using a low ESR capacitor will result in lower ripple. POSITIVE VOLTAGE DOUBLER The ...

Page 8

Application Information value, smaller size capacitor usually has a higher ESR com- FIGURE 3. Output Source Resistance vs Oscillator Frequency Manufacturer Phone Nichicon Corp. (708)-843-7500 AVX Corp. (803)-448-9411 Sprague (207)-324-4140 Sanyo (619)-661-6835 Other Applications PARALLELING DEVICES Any number of LM2660s ...

Page 9

Other Applications (Continued) CASCADING DEVICES Cascading the LM2660s (or LM2661s easy way to produce a greater negative voltage (as shown in Figure 5 the integer representing the number of devices cas- caded, the unloaded output ...

Page 10

Other Applications (Continued) REGULATING V out It is possible to regulate the output of the LM2660/LM2661 by use of a low dropout regulator (such as LP2951). The whole converter is depicted in Figure 8. This converter can give a regulated ...

Page 11

Other Applications (Continued) FIGURE 9. Generating +5V from +3V Input Voltage 11 01291128 www.national.com ...

Page 12

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 8-Lead SO (M) Order Number LM2660M or LM2661M NS Package Number M08A 8-Lead Mini SO (MM) Order Number LM2660MM or LM2661MM NS Package Number MUA08A 12 ...

Page 13

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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