Dc-Dc Converter, 35Khz, Tsop-6; Ic Case/Package:Tsop; No. Of Pins:6Pins; Output Current Max:50Ma; Fixed Output Voltage Nom:-; Adjustable Output Voltage Min:-5.5V; Adjustable Output Voltage Max:-1.15V; Input Voltage Min:1.15V; Msl:-Rohs Compliant: Yes |Onsemi NCP1729SN35T1G

NCP1729SN35T1G – 35kHz DC-DC Switching Regulator – onsemi

This NCP1729SN35T1G DC-DC switching regulator from onsemi delivers efficient voltage conversion in space-constrained designs. Engineered for precision power management, this charge pump IC generates negative or positive rail voltages from low input sources while maintaining a compact TSOT-23-6 footprint. PCX ensures genuine onsemi components with reliable same-day shipping and technical support.

Key Features

• 1.15V to 5.5V Input Range – Operates from ultra-low voltages
• Fixed Negative Output – Generates -Vin or nVin rails
• 50mA Output Current – Ideal for low-power applications
• 35kHz Switching Frequency – Optimized for noise-sensitive environments
• -40°C to 85°C Operating Range – Industrial temperature resilience
• Ratiometric Function – Maintains consistent voltage ratios

Technical Specifications

This single-output charge pump regulator features a surface-mount TSOT-23-6 package with non-synchronous rectification. The fixed output configuration requires no external compensation while supporting input voltages as low as 1.15V. With MSL-compliant packaging and RoHS certification, it meets rigorous industry standards for reliability and environmental safety.

Typical Applications

• Bias voltage generation for op-amps and sensors
• Portable medical monitoring devices
• Backup power circuits in IoT modules
• LCD display driver power supplies
• Battery-operated instrumentation

About onsemi

onsemi (formerly ON Semiconductor) is a global leader in power management technologies with over 25 years of innovation in energy-efficient solutions. Their semiconductor components are renowned for exceptional quality control, serving mission-critical applications across automotive, industrial, and medical sectors.

The company maintains rigorous manufacturing standards certified under IATF 16949 and ISO 9001, ensuring consistent performance in extreme environments. onsemi’s commitment to sustainable technologies makes them a preferred partner for next-generation electronic designs requiring uncompromising reliability.

About DC-DC Switching Regulators

DC-DC switching regulators efficiently convert input voltages to higher or lower levels using pulse-width modulation (PWM) techniques. Unlike linear regulators, they minimize power dissipation through high-frequency switching, achieving superior energy efficiency – particularly crucial for battery-powered devices where thermal management and runtime are critical.

Charge pump regulators like the NCP1729 series provide compact, inductor-free voltage inversion and multiplication solutions. Their simplified architecture reduces component count while delivering stable outputs for analog circuits, display drivers, and interface modules where board space is constrained. This makes them indispensable in modern portable electronics design.

Packaging Options

Available in Tape & Reel (TR), Cut Tape (CT), and Digi-Reel® configurations for automated assembly. Please specify packaging preference during ordering.

Frequently Asked Questions

Question: What is the typical efficiency of this charge pump?

Answer: Efficiency ranges from 85-92% depending on input voltage and load conditions – refer to the datasheet for detailed performance curves.

Question: Does this regulator require external components?

Answer: Yes, it typically requires 2-4 external capacitors for operation as shown in the application schematics.

Question: Is this IC suitable for new designs despite being obsolete?

Answer: While marked obsolete, it remains available for existing designs and legacy repairs through PCX’s inventory.

Question: Can it generate positive voltages?

Answer: Yes, its ratiometric architecture supports both positive (xVin) and negative (-Vin) outputs.

Question: What is the quiescent current consumption?

Answer: Typical quiescent current is 60μA at 3.3V input (no load).

Question: Is evaluation hardware available?

Answer: PCX provides datasheets and application notes; contact our technical team for design support.

Product images are representational only. Refer to datasheet for exact specifications.

Download Datasheet: NCP1729SN35T1G Technical Documentation

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