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Product details

Parameters

Vin (Min) (V) 1.5 Vin (Max) (V) 5.5 Vout (Min) (V) -5.5 Vout (Max) (V) 11 Iout (Max) (A) 0.2 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 27.5 Switching frequency (Max) (kHz) 75 Iq (Typ) (mA) 1.3 Features Enable Operating temperature range (C) -40 to 85 Type Charge Pump Rating Catalog open-in-new Find other Charge pumps (inductorless)

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 open-in-new Find other Charge pumps (inductorless)

Features

  • Inverts or Doubles Input Supply Voltage
  • 3.5-Ω Typical Output Resistance
  • 86% Typical Conversion Efficiency at 200 mA
  • (LM2662) Selectable Oscillator Frequency:
    20 kHz/150 kHz
  • (LM2663) Low Current Shutdown Mode
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Description

The LM2662/LM2663 CMOS charge-pump voltage converter inverts a positive voltage in the range of 1.5 V to 5.5 V to the corresponding negative voltage. The LM2662/LM2663 uses two low cost capacitors to provide 200 mA of output current without the cost, size, and EMI related to inductor based converters. With an operating current of only 300 µA and operating efficiency greater than 90% at most loads, the LM2662/LM2663 provides ideal performance for battery powered systems. The LM2662/LM2663 may also be used as a positive voltage doubler.

The oscillator frequency can be lowered by adding an external capacitor to the OSC pin. Also, the OSC pin may be used to drive the LM2662/LM2663 with an external clock. For LM2662, a frequency control (FC) pin selects the oscillator frequency of 20 kHz or 150 kHz. For LM2663, 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 10 µA. The oscillator frequency for LM2663 is 150 kHz.

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Technical documentation

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Type Title Date
* Data sheet LM266x Switched Capacitor Voltage Converter datasheet (Rev. E) Oct. 31, 2014
White paper The Forgotten Converter Jun. 15, 2015
Technical article Painting a picture for powering high-performance FPGAs Sep. 05, 2013
Technical article Analog Applications Spotlight: Mark Pieper Jun. 06, 2013
Technical article How to choose an LDO or switching regulator May 08, 2013
User guide AN-1142 LM2661/3/4 Evaluation Board (Rev. C) Apr. 30, 2013
Technical article Engineer It Video Series: Testing Power Supplies Mar. 26, 2013

Design & development

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Hardware development

EVALUATION BOARD Download
document-generic User guide
49
Description

The LM2661, LM2663, and LM2664 are part of a family of CMOS charge-pump voltage converters (Table 2). Each uses two small capacitors to achieve voltage inversion or voltage doubling without the cost, size, and EMI of inductor based converters. Each device has a shutdown feature and the LM2661 and (...)

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Package Pins Download
SOIC (D) 8 View options

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