company blog about Mingjiada Supply And Recycle ADI LTC4372CDD - LTC4372 Series Low Quiescent Curren Ideal Diode Controller

Mingjiada Supply And Recycle ADI LTC4372CDD - LTC4372 Series Low Quiescent Curren Ideal Diode Controller

In cutting-edge application areas such as humanoid robots, automotive electronics and industrial power supplies, the efficient management and reliability of power paths remain core challenges in system design.

With the surging demand for highly reliable redundant power supplies and low-power battery protection in humanoid robots, collaborative robotic arms and high-performance mobile robots, the ADI (Analog Devices) LTC4372 series of low-quiescent-current ideal diode controllers has become a key component in robotic power distribution units (PDUs) and backup battery switching circuits. Shenzhen Mingjiada Electronics Co., Ltd. — currently maintains a long-term stock of ADI LTC4372CDD and the full range of LTC4372/LTC4373 ideal diode controllers, whilst offering high-value buy-back services. We support the disposal of samples, small batches and full factory batches of obsolete stock.

I. ADI LTC4372CDD Product Overview
The LTC4372CDD is a high-voltage, low-quiescent-current ideal diode controller that drives an external N-channel MOSFET to replace a power Schottky diode, thereby significantly reducing conduction losses. It is widely used in systems requiring efficient OR-gating and power path protection.
An operating current of 5 μA ensures high efficiency for intermittent load applications or always-on standby power supplies. In the event of a power supply failure or short circuit, the fast turn-off function minimises reverse current transients. The LTC4372CDD controls back-to-back N-channel MOSFETs for inrush current control and load switching.

II. Specifications (LTC4372CDD)
Part Number: LTC4372CDD (Commercial Temperature Grade 0°C to +70°C)
Function: Single-channel N+1 OR-ing ideal diode controller
Operating Voltage: 2.5V to 80V
Quiescent Current: 5 μA (active) / 0.5 μA (off)
Reverse Turn-Off Time: ≤1.5 μs – fast reverse current blocking
Package: 8-lead DFN (3 mm × 3 mm × 0.75 mm) DFN-8 package with exposed pads
Drive Capability: Drives a single or back-to-back N-MOSFET; supports surge control and load switching
Suitability for Humanoid Robots: The LTC4372CDD’s ultra-low quiescent current and microsecond-level reverse current blocking characteristics make it ideal for applications in humanoid robots, such as redundant parallel connection of multiple battery packs, backup power maintenance for joint modules, and DC bus OR-ing protection. It effectively extends operating time and prevents damage caused by reverse current.

III. Key Features of the LTC4372CDD:
1. Ultra-low on-state voltage drop, reducing the robot’s overall power consumption
Replacing traditional Schottky diodes, the MOSFET’s on-state voltage drop is in the millivolt range. This reduces heat generation from the power supply during prolonged walking and joint movement by humanoid robots, thereby extending the lithium-ion battery’s runtime.
2. Ultra-fast reverse current blocking to protect the robot’s power hardware
In scenarios where multiple batteries are connected in parallel, the circuit is instantly interrupted should a single cell become under-voltage or short-circuited, preventing reverse current from flowing back. This prevents the destruction of servo drivers, AI vision boards and the main control chip, thereby enhancing the operational stability of humanoid robots.
3. Ultra-wide 2.5V–80V voltage range
Compatible with the 24V and 48V power lithium batteries commonly used in humanoid robots, whilst also supporting 3.3V and 12V auxiliary power supplies for control boards; a single chip covers the robot’s multi-voltage power supply system.
4. -28V high-voltage reverse connection protection, simplifying peripheral circuitry
Accidental reverse connection of the battery will not damage the chip, eliminating the need for additional TVS diodes and reverse-connection protection diodes. This reduces the PCB footprint on the robot’s control board and facilitates a more compact, lightweight body design.
5. 3×3mm DFN-8 micro-package
Its compact size makes it suitable for the confined spaces of humanoid robot joint drive boards and built-in power modules within the body, saving internal wiring space.
6. Ultra-low quiescent current in the microampere range
Power consumption is extremely low during robot standby and sleep modes, preventing lithium-ion battery discharge during periods of inactivity, making it suitable for portable humanoid robots and educational humanoid robots.
7. SHDN hardware enable control pin
The power supply can be switched on and off via an MCU output signal, enabling segmented robot sleep and low-power standby management, and supporting intelligent sleep and timed power-off functions.
8. Support for back-to-back MOSFET drive
When paired with two N-channel MOSFETs, this provides bidirectional surge suppression, mitigating high-current surges during robot power-up and emergency stop procedures to protect precision power components.

IV. Main Application Scenarios (LTC4372CDD)
Humanoid Robots / Service Robots — Dual-battery redundancy switching for joint drive modules; OR-gating of ideal diodes on the main control board’s 5V/12V/24V buses
Automotive Electronics — Protection against reverse battery connection and cold start; redundant power paths
Industrial Portable Instruments / Energy Storage — Battery charge/discharge path management; ideal diodes for solar MPPT bypass
Communications and Industrial Control — N+1 power redundancy for 48V or wide-voltage DC systems

V. List of Supplied and Recycled Models
Mingjiada Electronics supplies and recycles the following ADI LTC4372 series models (including but not limited to):
LTC4372CDD
LTC4372CMS8
LTC4372HDD
LTC4372HMS8
LTC4372IDD
LTC4372IMS8

Mingjiada Electronics has long specialised in supplying ADI LTC4372 series ideal diode controllers. We maintain ample stock of the key model, the LTC4372CDD (DFN-8 package), and also offer a long-term buy-back service for chips in this series. These products are widely used in humanoid robots, automotive electronics, industrial power supplies, redundant power systems, portable devices and other fields.

For further information on the ADI LTC4372 series of ideal diode controllers, to order samples or to enquire about buy-back prices, please visit the Mingjiada Electronics website (https://www.integrated-ic.com/) for further details on supply and demand.