Overview
The LM3489MM/NOPB, produced by Texas Instruments, is a high-efficiency PFET switching regulator controller designed to facilitate the development of small, cost-effective switching buck regulators. This device employs a hysteretic control architecture, which simplifies the design process by eliminating the need for control loop compensation. It is particularly suited for a wide range of applications due to its ease of use and robust performance characteristics.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| VIN Supply Voltage | 4.5 | - | 35 | V |
| Operating Junction Temperature | -40 | - | 125 | °C |
| Feedback Voltage | 1.214 | 1.239 | 1.264 | V |
| Quiescent Current at Ground Pin | 280 | 400 | - | µA |
| Shutdown Input Supply Current | 7 | 15 | - | µA |
| Maximum Operation Frequency | - | - | > 1 MHz | - |
| Current Limit ADJ Current Source | 3 | 5.5 | 7 | µA |
| Package Type | - | - | VSSOP-8 | - |
Key Features
- Qualified for Automotive Parts with AEC-Q100 qualification
- Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
- Device HBM ESD Classification Level 2 and CDM ESD Classification Level C5
- Easy-to-use control methodology with no control loop compensation required
- Wide 4.5-V to 35-V input range and 1.239 V to VIN adjustable output range
- High efficiency: up to 93%
- ±1.3% (±2% over temperature) internal reference
- 100% duty cycle operation and maximum operation frequency > 1 MHz
- Current limit protection and dedicated enable pin (on if unconnected)
- Shutdown mode draws only 7-µA supply current
Applications
- Set-Top Boxes
- DSL or Cable Modems
- PC/IA
- Auto PCs
- TFT Monitors
- Battery-Powered Portable Applications
- Distributed Power Systems
- Always-On Power
- High-Power LED Drivers
- Automotive Systems
Q & A
- What is the input voltage range of the LM3489MM/NOPB?
The input voltage range is from 4.5 V to 35 V.
- What is the operating junction temperature range for the LM3489MM/NOPB?
The operating junction temperature range is from –40°C to 125°C.
- What is the typical feedback voltage of the LM3489MM/NOPB?
The typical feedback voltage is 1.239 V.
- Does the LM3489MM/NOPB require control loop compensation?
No, it does not require control loop compensation due to its hysteretic control architecture.
- What is the maximum operation frequency of the LM3489MM/NOPB?
The maximum operation frequency is greater than 1 MHz.
- How much current does the LM3489MM/NOPB draw in shutdown mode?
In shutdown mode, it draws only 7 µA of supply current.
- What type of package does the LM3489MM/NOPB come in?
The LM3489MM/NOPB comes in an 8-pin VSSOP package.
- Is the LM3489MM/NOPB qualified for automotive applications?
- What is the efficiency of the LM3489MM/NOPB?
The efficiency of the LM3489MM/NOPB can be up to 93%.
- Does the LM3489MM/NOPB have current limit protection?
