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  High Voltage Inverting Charge Pump Produces Low Noise Positive and Negative Supplies &mdash DN507
  PDF, 522 Kb, File published: Aug 28, 2012
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  High Voltage Inverting Charge Pump Produces Low Noise
  Positive and Negative Supplies – Design Note 507
  Marty Merchant Inverting Charge Pump
  The LTC3260 can supply up to 100mA from the inverted
  input voltage at its charge pump output, VOUT. VOUT
  also serves as the input supply to a negative LDO
  regulator, LDO –. The charge pump frequency can be
  adjusted between 50kHz to 500kHz by a single external
  resistor. The MODE pin is used to select between a high
  efficiency Burst Mode operation or constant frequency
  mode to satisfy low noise requirements.
  12V 4.7ВµF 1ВµF LDO+ VIN LTC3260
  EN+ ADJ+ EN– BYP+ MODE GND + – C BYP C– ADJ– 4.7µF 10nF
  10nF 316k 5V
  ILDO+ ≤ 50mA 100k
  100k
  316k –12V 10µF LDO– VOUT
  RT 4.7ВµF
  dn507 F01 |IVOUT| ≤ 100mA – |ILDO–| 200k Figure 1. Typical 12V to ±5V Supply
  10/12/507 –5V
  |ILDO–| ≤ 50mA Constant Frequency Mode
  A single resistor at the RT pin sets the constant operating
  frequency of the charge pump. If the RT pin is grounded, …

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Manufacturer's Classification

• Power Management > Inductorless (Charge Pump) DC/DC Converters > Regulated Inverting Charge Pumps | High Voltage Charge Pumps
• Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Power Management

Other Names:

LTC3260MPMSETRPBF, LTC3260MPMSE TRPBF