Charge pumps (inductorless)

Smaller than an inductive solution, higher efficiency than an LDO

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Our easy-to-use charge pump portfolio offers the industry's smallest solution size and highest performance. Charge pumps are ideal for low-power industrial, personal electronics and telecommunications applications. Key features and benefits include eliminating inductor issues, higher efficiency at lower input voltages and smaller solution size.

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Regulated

Larger efficiency gain over usable input range and lower ripple on the output

Unregulated

Simpler way to divide the input voltage by two and supports higher input voltage range

Technical resources

Circuit design
Circuit design
Charge pump circuit (–0.3V) for negative amplifier supply
The application note shows you how to create a small negative power supply (–0.232 V) using the LM7705 low-noise negative bias generator with a single 3-V to 5.25-V power supply.
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Application note
Application note
Attenuator Amplifier Design to Maximize the Input Voltage of Differential ADCs
This application report describes the challenges faced when attenuating large signals for digitization and provides solutions for converting a large single-ended input signal to a differential signal sampled by an ADC.
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Technical article
Technical article
Pump it up quietly
One challenge with a charge pump solution is that it can be a bit noisier than an inductive DC/DC converter.  Learn how you can effectively solve this challenge with our LM27761 negative-charge pump.

Design & development resources

Evaluation board
Evaluation Module for Step-Down Charge Pump TPS60500

The TPS60500EVM-193 is an evaluation tool for the high efficiency step-down charge pump TPS60500. The output voltage of the TPS60500 is adjustable in the range of 0.8 V to 3.3 V. On the EVM, the output voltage is set to 1.5 V. The TPS60500 operates from an input voltage of 1.8 V to 6.5 V. The (...)

Evaluation board
Switched Capacitor Voltage Converter

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 (...)

Simulation tool
PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)

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