LTC3722HGN-1

The LTC3722HGN-1 is a dual, high‑voltage, synchronous buck regulator controller from Linear Technology (now Analog Devices). It’s designed to generate two low‑voltage rails from a higher input in compact, high‑efficiency power boards (e.g., CPU/FPGAs, telecom).
Key points
- Two independent current‑mode buck controllers, suitable for interleaved 2‑phase operation.
- Drives external power MOSFETs for each channel; enables high current and efficiency.
- Programmable switching frequency; fast transient response.
- Protections: UVLO/OVLO, overcurrent/short‑circuit, thermal shutdown; soft‑start; enable; remote sense options.
- Outputs set via external feedback resistors; supports multi‑rail designs with status flags (PGOOD/FAULT).
Package: HGN denotes a specific Linear Technology package; -1 indicates a revision/alignment in that family.
For exact electrical specs (input range, max current, efficiency, pinout), consult the LTC3722 data sheet and evaluation boards.

Key features of LTC3722HGN-1 (concise):
- Dual, synchronous buck controller with two gate-drive channels
- Interleaved two-phase operation for improved ripple and transient response
- Drives external N-channel MOSFETs (high-side and low-side) with integrated gate drives
- Current-mode control with slope compensation; cycle-by-cycle overcurrent protection
- Programmable switching frequency; clock synchronization input option
- Adjustable output voltages via feedback network; soft-start and output tracking
- Enable/shutdown control and undervoltage lockout (UVLO)
- Protections: overcurrent/short-circuit, overvoltage, undervoltage, thermal shutdown
- Optional power-good/status indication
- Suitable for CPU VRM/multi-rail supplies; wide input range and high efficiency
- Compact HGN package with robust performance for demanding applications

Pin count: 28 pins (LTC3722HGN-1 in HGN package).
Function: Dual, multiphase, synchronous buck regulator controller. Provides two PWM/controller channels with gate-drive outputs for external N-channel MOSFETs, offering current-mode control, programmable frequency, soft-start, current limit, enable, and power-good features for VRM applications. External MOSFETs/inductors required; no integrated FETs.

- Manufacturer: Analog Devices, Inc. (ADI). The LTC3722HGN-1 is a Linear Technology part now under ADI after their acquisition of Linear Technology in 2017.
- What kind of company: A multinational semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits, including power-management and related solutions.

Applications for LTC3722HGN-1 include:
- High-efficiency multi-rail VRMs for CPUs/GPUs in desktops and servers
- Telecom and data-center DC-DC power systems
- Automotive power management (12V–vehicle to 5V/3.3V rails, battery/ECU use)
- Industrial and medical DC-DC converters
- Solar/battery-powered systems with wide input range
- Embedded power modules requiring compact, synchronous buck/buck-boost regulation

It comes in a 28‑lead HTSSOP (TSSOP) package.