LTC3789IGN#PBF

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LTC3789IGN#PBF

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IC REG CTRLR BUCK-BOOST 28SSOP

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Thông số kỹ thuật

thuộc tính Giá trị
Supplier Analog Devices Inc.
Package Tube
ProductStatus Active
OutputType Transistor Driver
Function Step-Up/Step-Down
OutputConfiguration Positive
Topology Buck-Boost
NumberofOutputs 2
OutputPhases 1
Voltage-Supply(Vcc/Vdd) 4V ~ 38V
Frequency-Switching 200kHz ~ 640kHz
DutyCycle(Max) 90%
SynchronousRectifier Yes
ClockSync No
ControlFeatures Current Limit, Enable, Frequency Control, Power Good, Soft Start
OperatingTemperature -40°C ~ 125°C (TJ)
MountingType Surface Mount
Package/Case 28-SSOP (0.154, 3.90mm Width)

Tổng quan

Description

LTC3789 is a high‑voltage, dual, 2‑phase PWM controller for DC‑DC converters (buck/boost/buck‑boost with external FETs to generate high‑current rails). The “IGN” suffix is the package code for the device variant (typically a specific leadframe/PCB package), and “#PBF” denotes Pb‑free packaging (tape & reel). Key features include wide input range, current‑mode control, adjustable switching frequency, soft‑start, enable and current limit, and remote sense for accurate regulation. It’s commonly used for CPU VRMs, telecom, and industrial power supplies to regulate voltages from a wide input to multiple rails. For exact specifications (input range, switching frequency, max current, topology, pinout), consult the LTC3789 datasheet and the product page.

Features

Key features of LTC3789IGN#PBF:
- Dual synchronous buck-boost DC-DC controller for two rails from a single input
- Wide input range suitable for 4.5–60V systems (high-voltage automotive/applications)
- Internal high-side and low-side MOSFETs for each channel
- Independent regulation with current-mode control and cycle-by-cycle current limit
- Seamless buck/boost operation to maintain outputs across input swings
- Programmable switching frequency and soft-start
- Enable input and Power-Good/status reporting
- Robust protections: overcurrent/short-circuit with hiccup, overvoltage, undervoltage, and thermal shutdown
- Fault/status pins for diagnostics and protection monitoring
- Pb-free, RoHS-compliant package (LTC3789IGN#PBF)
Note: Exact pinout and package details are in the datasheet.

Pinout

- Pin count: 28 pins (28‑lead package; PBF indicates lead-free).
- Function: LTC3789IGN#PBF is a triple (multi-rail) synchronous buck regulator controller. It provides three PWM-driven high-side/low-side switch channels for multi-output regulation, with current‑sense, overcurrent protection, soft-start, enable/shutdown, and I2C monitoring/programming capabilities.

Manufacturer

Manufacturer: Analog Devices, Inc. (the LTC parts originated from Linear Technology Corporation; LTC is now a brand under Analog Devices after its acquisition in 2017).
What kind of company: American multinational semiconductor company that designs, manufactures, and markets analog, mixed-signal, and power-management integrated circuits.

Application

Application areas for LTC3789IGN#PBF:
- Automotive power electronics (wide-input buck/boost regulation for vehicle systems)
- Industrial and process-control DC-DC rails (high-efficiency power conversion)
- Telecom/datacom power modules (stable multi-rail supplies)
- Solar and battery charging/energy-storage systems (buck-boost regulation)
- Multi-output power supplies requiring high-efficiency buck-boost operation
Note: It’s a high-power, wide-input, multiphase buck/boost controller suitable for demanding DC-DC applications.

Package

28-pin plastic LQFP package (Pb-free, RoHS) for LTC3789IGN#PBF.

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