LM2660M/NOPB National Semiconductor, LM2660M/NOPB Datasheet - Page 10

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

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

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Other Applications
REGULATING V
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 output from −1.5V to −5.5V by choosing the
proper resistor ratio:
where, V
Also, as shown in Figure 9 by operating LM2660/LM2661 in
voltage doubling mode and adding a linear regulator (such
as LP2981) at the output, we can get +5V output from an
input as low as +3V.
ref
= 1.235V
FIGURE 8. Combining LM2660/LM2661 with LP2951 to Make a Negative Adjustable Regulator
out
(Continued)
FIGURE 7. Generating +3V
10
The error flag on pin 5 of the LP2951 goes low when the
regulated output at pin 4 drops by about 5%. The LP2951
can be shutdown by taking pin 3 high.
in
from +V
in
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