規格
| 屬性 | 價值 |
| 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) |
概述
Description
The LTC3789EGN#PBF is Linear Technology (now Analog Devices) high‑voltage, dual‑channel switching regulator controller. It drives external MOSFETs to implement two synchronous buck regulators from a higher input, enabling two regulated rails with shared timing and sequencing. Key features include programmable switching frequency, soft‑start, enable/disable control, current‑limit protection, undervoltage/overvoltage protection, and remote sensing for accurate regulation. It requires external power MOSFETs, inductors and diodes (or uses synchronous rectification with external FETs). The EGN suffix denotes the Pb‑free, RoHS‑compliant package variant, and #PBF indicates the Pb‑free packaging code. Typical applications are multi‑rail power supplies in telecom, networking, servers, and industrial equipment where two well‑regulated rails are needed from a single high‑voltage input. For exact pinout and electrical specs, refer to the LTC3789 data sheet and application notes.
Features
Here are the key features of LTC3789EGN#PBF (datasheet highlights):
- Wide input range up to about 60V; supports buck, boost, and buck-boost operation.
- High-current, dual/2-phase capable DC-DC controller for high-power designs.
- Programmable switching frequency (typically 100 kHz–600 kHz range).
- Current-mode control with slope compensation and cycle-by-cycle current limit.
- Programmable soft-start and adjustable output voltage via feedback network.
- Enable input and Power-Good indication.
- Protections: overcurrent/short-circuit, overvoltage, undervoltage, and thermal shutdown.
- Internal bias regulator for logic and bias needs.
- Pb-free package (PBF suffix) in EGN package.
Notes: For exact voltage ranges, timing, and connection pins, please consult the LTC3789 datasheet.
- Wide input range up to about 60V; supports buck, boost, and buck-boost operation.
- High-current, dual/2-phase capable DC-DC controller for high-power designs.
- Programmable switching frequency (typically 100 kHz–600 kHz range).
- Current-mode control with slope compensation and cycle-by-cycle current limit.
- Programmable soft-start and adjustable output voltage via feedback network.
- Enable input and Power-Good indication.
- Protections: overcurrent/short-circuit, overvoltage, undervoltage, and thermal shutdown.
- Internal bias regulator for logic and bias needs.
- Pb-free package (PBF suffix) in EGN package.
Notes: For exact voltage ranges, timing, and connection pins, please consult the LTC3789 datasheet.
Pinout
- Pin count: 28 pins (28-lead package)
- Function: High-voltage dual synchronous buck-boost controller. Drives external MOSFETs for buck/boost operation, provides dual feedback and current-mode control, soft-start, enable/shutdown, and protection features (overcurrent/UVLO/PGOOD).
- Function: High-voltage dual synchronous buck-boost controller. Drives external MOSFETs for buck/boost operation, provides dual feedback and current-mode control, soft-start, enable/shutdown, and protection features (overcurrent/UVLO/PGOOD).
Manufacturer
Manufacturer: Analog Devices, Inc. (ADI) — the company that now owns Linear Technology; LTC prefixes are from Linear Technology, which ADI acquired.
What kind of company: A multinational semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits.
What kind of company: A multinational semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits.
Application
LTC3789EGN#PBF is a high‑voltage, wide-input buck‑boost controller. Typical application areas include:
- Automotive power management (12–60V input, rail generation, battery charging, load-dump tolerance)
- Industrial power supplies with wide input ranges
- Telecom/datacom DC‑DC modules requiring high efficiency
- Solar MPPT and renewable‑energy charge controllers
- Battery charging and backup/UPS power systems
- Any compact, high‑efficiency DC‑DC converter needing buck‑boost operation over a wide input range
- Automotive power management (12–60V input, rail generation, battery charging, load-dump tolerance)
- Industrial power supplies with wide input ranges
- Telecom/datacom DC‑DC modules requiring high efficiency
- Solar MPPT and renewable‑energy charge controllers
- Battery charging and backup/UPS power systems
- Any compact, high‑efficiency DC‑DC converter needing buck‑boost operation over a wide input range
Package
28‑lead Plastic TSSOP (Thin Shrink Small Outline Package); Pb‑Free variant (suffix #PBF).
