company blog about Mingjiada Electronics Supply ADI LTC3863 Series Low IQ Inverting DC/DC PMOS Controller

Mingjiada Electronics Supply ADI LTC3863 Series Low IQ Inverting DC/DC PMOS Controller

In industrial automation, communications equipment, test and measurement, and automotive electronic systems, negative voltage supply rails are commonly used in applications such as operational amplifiers, ADCs/DACs, sensor biasing, and OLED/display biasing. The design of negative voltage power supplies often faces challenges such as complex topologies, cumbersome gate driving, and high standby power consumption. ADI (Analog Devices) has launched the LTC3863, a 60V, low IQ, negative-output DC/DC PMOS controller that utilises an external P-channel MOSFET as the main switch, thereby simplifying the design of negative-output power supplies. Mingjiada Electronics supplies the ADI LTC3863, offering samples, small-batch procurement and full-reel supply.

[ADI/LINEAR] LTC3863 – 60V, Low IQ, Negative Output DC/DC Controller
The LTC3863 is a robust negative output DC/DC PMOS controller, optimised for automotive and industrial applications. It drives a single P-channel power MOSFET to generate a negative output, and requires only a single inductor to form a complete circuit. Output voltages typically range from –0.4 V to –150 V, with the potential for higher voltages (limited only by external components).
The LTC3863 offers excellent light-load efficiency, drawing only 70 μA of quiescent current in a user-programmable burst-mode operation. Its peak-current-mode, constant-frequency PWM architecture enables precise control of the switching frequency and output current limits. The switching frequency can be set within a range of 50 kHz to 850 kHz using an external resistor, and can be synchronised to an external clock with a frequency between 75 kHz and 750 kHz.

Key Features of the LTC3863:
Wide operating VIN range: 3.5 V to 60 V
Wide negative VOUT range: –0.4 V to over –150 V
Low operating IQ = 70 μA
Robust high-voltage MOSFET gate driver
Constant-frequency current-mode architecture
Validated via FMEA for adjacent pin open-circuit and short-circuit conditions
Option to operate in high-efficiency Burst Mode® or pulse-skipping mode under light load conditions
Programmable fixed frequency: 50 kHz to 850 kHz
Lock-in frequency: 75 kHz to 750 kHz
Accurate current limit
Programmable soft-start or voltage tracking
Internal soft-start ensures smooth start-up
Low quiescent current: IQ = 7 μA
Available in a small-outline 12-pin thermally enhanced MSOP package and a DFN package

Typical applications for the LTC3863:
Negative supply rails for industrial automation and PLCs
Negative bias for telecommunications base stations, network switches and optical modules
Test and measurement, ATE and data acquisition systems
Negative power supplies for operational amplifiers and ADCs/DACs
Negative bias for OLEDs and display panels
Negative rails for sensors and audio amplifiers
Negative power supplies for automotive electronics

Availability Information
Shenzhen Mingjiada Electronics Co., Ltd. — Long-standing distributor of the ADI/LINEAR product range. The LTC3863 series of negative-output DC/DC PMOS controllers is always in stock:
LTC3863EDE
LTC3863EMSE
LTC3863HMSE
LTC3863IDE
LTC3863IMSE
LTC3863MPDE
LTC3863MPMSE

[LTC3863] Suitable for industrial and automotive power supplies, telecommunications power supplies, distributed power systems and other fields. Mingjiada Electronics maintains stock of mainstream models and supports both small-batch samples and large-volume orders. Backed by an efficient logistics system, we ensure rapid product delivery. For further information on the LTC3863 series of negative-output DC/DC PMOS controllers or to enquire about sample prices, please visit the Mingjiada Electronics website (https://www.integrated-ic.com/) for more supply details.