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LTC3728LXCUH
+BOMIC REG CTRLR BUCK 32QFN
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Nhà sản xuấtCông ty Analog Devices Inc.
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Ông. Phần #LTC3728LXCUH
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Thông số kỹ thuật
| thuộc tính | Giá trị |
| Part Status | Discontinued at DigiKey |
| Base Product Number | LTC3728 |
| Output Type | Transistor Driver |
| Function | Step-Down |
| Output Configuration | Positive |
| Topology | Buck |
| Number of Outputs | 2 |
| Output Phases | 2 |
| Voltage - Supply (Vcc/Vdd) | 4.5V ~ 28V |
| Frequency - Switching | 260kHz ~ 550kHz |
| Duty Cycle (Max) | 99.4% |
| Synchronous Rectifier | Yes |
| Clock Sync | No |
| Control Features | Enable, Power Good, Soft Start |
| Operating Temperature | 0°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 32-WFQFN Exposed Pad |
| Supplier Device Package | 32-QFN (5x5) |
| Packaging | Tube |
Tổng quan
Description
LTC3728LXCUH is a Linear Technology (now Analog Devices) DC-DC controller used to implement efficient buck regulators for multi-rail power systems. It provides dual, independent PWM controllers with current-mode control intended to drive external N-channel MOSFETs in a buck topology. Key features typically include programmable switching frequency, soft-start, enable/disable control, and protective functions (overcurrent, UVLO, thermal) for robust operation. It is well suited for point-of-load and multi-rail designs in telecom, computing, automotive, and industrial applications where two regulated outputs are derived from a common input. The LXCUH suffix denotes the device’s packaging and lead-free manufacturing, in a 28-pin package suitable for compact implementations. Design generally requires external MOSFETs, inductors, and feedback network to set output voltages. For exact electrical specifications, pinouts, and application notes, consult the LTC3728 datasheet and the LXCUH packaging guide.
Features
LTC3728LXCUH features (highlights):
- Dual synchronous buck controller with 2-phase interleaved operation
- Independent channel control with current-mode regulation and cycle-by-cycle current limit
- Programmable switching frequency; supports forced-PWM and light-load modes (auto/PWM- or PFM-like)
- Separate voltage feedback for each channel, with true remote sensing and independent output regulation
- Phase/tracking options, soft-start, and enable control for glitch-free startup
- Robust protection: undervoltage lockout (UVLO), overvoltage protection, overcurrent/short-circuit protection
- Thermal shutdown and safe operating area considerations
- Power-good/status indicators for each channel
- Suitable for high-efficiency multiphase buck regulators (e.g., CPU VRMs), with integrated gate drive capability
Note: For exact electrical specs, pinout, and package details (LXCUH), please consult the LTC3728 datasheet.
- Dual synchronous buck controller with 2-phase interleaved operation
- Independent channel control with current-mode regulation and cycle-by-cycle current limit
- Programmable switching frequency; supports forced-PWM and light-load modes (auto/PWM- or PFM-like)
- Separate voltage feedback for each channel, with true remote sensing and independent output regulation
- Phase/tracking options, soft-start, and enable control for glitch-free startup
- Robust protection: undervoltage lockout (UVLO), overvoltage protection, overcurrent/short-circuit protection
- Thermal shutdown and safe operating area considerations
- Power-good/status indicators for each channel
- Suitable for high-efficiency multiphase buck regulators (e.g., CPU VRMs), with integrated gate drive capability
Note: For exact electrical specs, pinout, and package details (LXCUH), please consult the LTC3728 datasheet.
Pinout
Pin count: 28 pins.
Function: LTC3728LXCUH is a dual-phase, synchronous buck (step-down) DC-DC controller for multiphase VRMs. It provides two PWM/gate-drive channels (for external MOSFETs), supports current/voltage regulation, soft-start, protection features, and is intended to drive a multi-phase DC-DC converter. External MOSFETs are required.
Function: LTC3728LXCUH is a dual-phase, synchronous buck (step-down) DC-DC controller for multiphase VRMs. It provides two PWM/gate-drive channels (for external MOSFETs), supports current/voltage regulation, soft-start, protection features, and is intended to drive a multi-phase DC-DC converter. External MOSFETs are required.
Manufacturer
Manufacturer: Analog Devices, Inc. (formerly Linear Technology Corporation, LTC).
What kind of company: A multinational semiconductor company that designs and manufactures analog, mixed-signal, and power-management integrated circuits.
What kind of company: A multinational semiconductor company that designs and manufactures analog, mixed-signal, and power-management integrated circuits.
Application
LTC3728LXCUH is a dual, high-efficiency, multi-rail buck regulator controller. Common applications include:
- Automotive and industrial DC-DC power supplies (wide input range, robust regulation)
- Multi-output point‑of‑load (POL) regulators for CPUs, GPUs, FPGAs, and ASICs
- Telecom and data‑center equipment VRMs (routers, switches, line cards)
- Server, storage, and embedded systems requiring compact, efficient low-voltage rails
These use cases leverage its multi‑phase, high‑efficiency regulation to generate several low-voltage rails from a single source.
- Automotive and industrial DC-DC power supplies (wide input range, robust regulation)
- Multi-output point‑of‑load (POL) regulators for CPUs, GPUs, FPGAs, and ASICs
- Telecom and data‑center equipment VRMs (routers, switches, line cards)
- Server, storage, and embedded systems requiring compact, efficient low-voltage rails
These use cases leverage its multi‑phase, high‑efficiency regulation to generate several low-voltage rails from a single source.
Package
The LTC3728LXCUH comes in a 28‑lead QFN package (approx. 5x6 mm) with an exposed pad.
