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LTC1148LCS-3.3

Name: LTC1148LCS-3.3
Rating: 4.7 (12 reviews)

IC REG CTRLR BUCK 14SOIC

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規格

Part Status	Obsolete
Base Product Number	LTC1148
Output Type	Transistor Driver
Function	Step-Down
Output Configuration	Positive
Topology	Buck
Number of Outputs	1
Output Phases	1
Voltage - Supply (Vcc/Vdd)	3.5V ~ 20V
Frequency - Switching	Up to 250kHz
Duty Cycle (Max)	100%
Synchronous Rectifier	Yes
Clock Sync	No
Control Features	Current Limit, Enable
Operating Temperature	0°C ~ 70°C (TA)
Mounting Type	Surface Mount
Package	14-SOIC (0.154", 3.90mm Width)
Supplier Device Package	14-SO
Packaging	Tube

概述

Description

The LTC1148LCS-3.3 is a 3.3V-logic version of Linear Technology’s LTC1148 family. It’s a high-performance DC power switch controller intended to gate external MOSFETs to form a low-loss power-distribution switch. The LCS suffix indicates the package type for this variant.
Key points:
- 3.3V logic-domain operation with protection features
- Current limiting, overcurrent protection, undervoltage lockout, and thermal shutdown
- Fault reporting/output status to simplify system monitoring
- Suitable for power rails in embedded systems, CPU/SoC power gating, LED drivers, and other load-switching applications
How it’s used:
- Connect input supply to VIN, place external MOSFETs as switches, and drive control/feedback pins with logic signals
- Use protection and status outputs to ensure robust operation
For exact pins, electrical specs, timing, and application notes, consult the official LTC1148LCS-3.3 datasheet. If you share a link or specific requirements, I can summarize the key figures.

Package

LTC1148LCS-3.3 uses an LCS package: Leadless Chip Scale Package, 8‑lead, with a small 3×3 mm body footprint.

Pinout

- Pin count: 8 pins (LCS package).
- Function: 3.3V microprocessor supervisor/reset IC; monitors the 3.3V rail and provides a reset output (with optional manual reset) when the supply is out of tolerance.

Manufacturer

Manufacturer: Linear Technology Corporation (LTC). It is a semiconductor company specializing in analog and mixed-signal integrated circuits. Linear Technology was acquired by Analog Devices in 2017, so LTC parts are now offered under Analog Devices.

Application

Fixed 3.3V step-down switching regulator used to generate 3.3V rails from higher inputs in compact power supplies. Typical applications: microprocessor/FPGA/ASIC and memory rails; DSPs; telecom/networking equipment; consumer electronics; automotive and industrial controllers; battery-powered/portable devices requiring high efficiency.

Equivalent

LTC1148LCS-3.3 is a hot-swap/current-limit controller. There isn’t a direct 1:1 cross‑reference published, but close equivalents include:
- Texas Instruments: TPS2460/TPS2462/TPS2463 (and TPS2440/TPS2442)
- On Semiconductor: NCP3063/NCP3064
Note: pinouts and exact specs differ; verify voltage range, current limit, enable, and packaging before replacing.