Datasheet

LM2660
SNVS135D –SEPTEMBER 1999–REVISED MAY 2013 www.ti.com
Typical Performance Characteristics (continued)
(Circuit of Figure 1)
Oscillator Frequency
vs
Temperature (FC = Open)
Figure 14.
CONNECTION DIAGRAMS
Figure 15. Top View
8-Lead SOIC (D) or VSSOP (DGK)
Pin Description
Function
Pin Name
Voltage Inverter Voltage Doubler
Frequency control for internal oscillator:
FC = open, f
OSC
= 10 kHz (typ);
1 FC Same as inverter.
FC = V+, f
OSC
= 80 kHz (typ);
FC has no effect when OSC pin is driven
externally.
Connect this pin to the positive terminal of charge-
2 CAP+ Same as inverter.
pump capacitor.
3 GND Power supply ground input. Power supply positive voltage input.
Connect this pin to the negative terminal of
4 CAP− Same as inverter.
charge-pump capacitor.
5 OUT Negative voltage output. Power supply ground input.
Low-voltage operation input. Tie LV to GND when
input voltage is less than 3.5V. Above 3.5V, LV
6 LV can be connected to GND or left open. When LV must be tied to OUT.
driving OSC with an external clock, LV must be
connected to GND.
Oscillator control input. OSC is connected to an
internal 15 pF capacitor. An external capacitor can Same as inverter except that OSC cannot be driven by
7 OSC
be connected to slow the oscillator. Also, an an external clock.
external clock can be used to drive OSC.
8 V+ Power supply positive voltage input. Positive voltage output.
6 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated
Product Folder Links: LM2660