仕様
| 属性 | 値 |
| Package / Case | Tube |
| Part Status | Obsolete |
| Function | Step-Down |
| Output Configuration | Positive |
| Topology | Buck |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 3.4V |
| Voltage - Input (Max) | 42V |
| Voltage - Output (Min/Fixed) | 0.97V |
| Voltage - Output (Max) | 40V |
| Current - Output | 2.5A |
| Frequency - Switching | 200kHz ~ 2.2MHz |
| Synchronous Rectifier | Yes |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount |
概要
Description
LT8611IUDD is a wide-input, high-efficiency buck-boost DC-DC converter with integrated MOSFETs from Analog Devices (Linear Technology). It supports buck, boost, and buck-boost operation using current-mode control. The device accepts a broad input range and provides a regulated output via an external feedback network. Key features include soft-start, programmable output voltage and/or current via a feedback divider, peak-current control, and protections such as overcurrent, overvoltage, undervoltage lockout, and thermal shutdown. It is designed for automotive and industrial power-supply applications and is suitable for compact, high-efficiency converters. The IUDD suffix denotes a specific package/lead configuration and temperature grade; review the datasheet for exact pinout and mechanical details.
Features
LT8611IUDD features (highlights):
- Wide input range buck-boost regulator with integrated high‑side/low‑side MOSFETs (synchronous)
- Wide output voltage range with external feedback for adjustable regulation
- High efficiency from synchronous rectification and versatile operation modes
- PWM/current‑mode control with good transient response
- Soft‑start to limit inrush and improve reliability
- Overcurrent/short‑circuit protection and thermal shutdown protection
- Overvoltage protection and UVLO for robust startup/shutdown
- Enable/disable input and Power‑Good indicator
- Suitable for automotive/industrial applications with robust protection
- Small 16‑lead package (IUDD) for compact designs
Note: For exact electrical specifications, pinout, and recommended operating conditions, refer to the LT8611IUDD datasheet.
- Wide input range buck-boost regulator with integrated high‑side/low‑side MOSFETs (synchronous)
- Wide output voltage range with external feedback for adjustable regulation
- High efficiency from synchronous rectification and versatile operation modes
- PWM/current‑mode control with good transient response
- Soft‑start to limit inrush and improve reliability
- Overcurrent/short‑circuit protection and thermal shutdown protection
- Overvoltage protection and UVLO for robust startup/shutdown
- Enable/disable input and Power‑Good indicator
- Suitable for automotive/industrial applications with robust protection
- Small 16‑lead package (IUDD) for compact designs
Note: For exact electrical specifications, pinout, and recommended operating conditions, refer to the LT8611IUDD datasheet.
Pinout
- Pin count: 28 pins (28-pin package)
- Function: High-voltage synchronous buck-boost DC-DC converter/controller with integrated MOSFETs, used to regulate a wide input voltage to a fixed output.
- Function: High-voltage synchronous buck-boost DC-DC converter/controller with integrated MOSFETs, used to regulate a wide input voltage to a fixed output.
Manufacturer
The LT8611IUDD is manufactured by Analog Devices, Inc. (ADI), which acquired Linear Technology. Analog Devices is a multinational semiconductor company that designs and manufactures analog, mixed-signal, and power-management integrated circuits (ICs), among other technologies.
Application
LT8611IUDD is a high‑voltage, wide‑input buck‑boost DC‑DC converter. Typical applications:
- Automotive power systems (12/24V, including load-dump tolerance)
- Industrial, telecom, and data‑center DC power rails needing wide VIN
- Solar/battery‑powered equipment with fluctuating input
- Portable/battery-powered devices requiring efficient regulation over a wide input range
- Front‑end or post‑regulation stages in high‑efficiency power supplies and adapters
(Uses wide VIN regulation to maintain stable outputs across varying inputs.)
- Automotive power systems (12/24V, including load-dump tolerance)
- Industrial, telecom, and data‑center DC power rails needing wide VIN
- Solar/battery‑powered equipment with fluctuating input
- Portable/battery-powered devices requiring efficient regulation over a wide input range
- Front‑end or post‑regulation stages in high‑efficiency power supplies and adapters
(Uses wide VIN regulation to maintain stable outputs across varying inputs.)
Package
LT8611IUDD is in a QFN package: 28 pins in a 4x4 mm package with an exposed pad.
