SIMPLE SWITCHER® 4.5V to 42V, 5A Step-Down DC/DC Switching Reg. with Frequency Synchronization
Product details
Parameters
Package | Pins | Size
Features
- Wide Input Voltage Range: 4.5 V to 42 V
- Internally Compensated Voltage Mode Control
- Stable With Low ESR Ceramic Capacitors
- 100-mΩ N-Channel MOSFET
- Output Voltage Options:
- -ADJ (Outputs as Low as 1.285 V)
- -5.0 (Output Fixed to 5 V)
- ±1.5% Feedback Reference Accuracy
- 500-kHz Default Switching Frequency
- Adjustable Switching Frequency and
Synchronization - –40°C to +125°C Operating Junction Temperature
Range - Precision Enable Input
- Integrated Boot-Strap Diode
- Integrated Soft-Start
- Fully WEBENCH® Enabled
- LM22677-Q1 is an Automotive-Grade Product
that is AEC-Q100 Grade 1 Qualified (–40°C to
+125°C Operating Junction Temperature) - NDR (Exposed Pad)
Description
The LM22677 switching regulator provides all of the functions necessary to implement an efficient high-voltage step-down (buck) regulator using a minimum of external components. This easy-to-use regulator incorporates a 42-V N-channel MOSFET switch that can provide up to 5 A of load current. Excellent line and load regulation along with high efficiency (> 90%) are featured. Voltage mode control offers short minimum on-time, allowing the widest ratio between input and output voltages. Internal loop compensation means that the user is free from the tedious task of calculating the loop compensation components. Fixed 5-V output and adjustable output voltage options are available. The default switching frequency is set at 500 kHz, thus allowing for small external components and good transient response. In addition, the frequency can be adjusted over a range of 200 kHz to 1 MHz with a single external resistor. The internal oscillator can be synchronized to a system clock or to the oscillator of another regulator. A precision enable input allows simplification of regulator control and system power sequencing. In shutdown mode the regulator draws only 25 µA (typical). The LM22677 also has built-in thermal shutdown, and current limiting to protect against accidental overloads.
The LM22677 device is a member of Texas Instruments SIMPLE SWITCHER family. The SIMPLE SWITCHER® concept provides for an easy-to-use complete design using a minimum number of external components and the TI WEBENCH design tool. TI's WEBENCH tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy design-in.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The LM22677 evaluation board is designed to demonstrate the capabilities of the LM22677 switching regulator. The LM22677 evaluation board schematic shown in Figure 1 is configured to provide an output voltage of 3.3V up to 5A load current with an input voltage range of 4.5V to 42V. Due to the low (...)
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
Design files
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download TIDA-00162 BOM (DS90UB913A-Q1).pdf (39KB) -
download TIDA-00162 BOM (DS90UB914A-Q1).pdf (139KB) -
download TIDA-00162 PCB (DS90UB913A-Q1).pdf (402KB) -
download TIDA-00162 PCB (DS90UB914A-Q1).pdf (7756KB) -
download TIDA-00162 Gerber (DS90UB913A-Q1).zip (10722KB) -
download TIDA-00162 Gerber (DS90UB914A-Q1).zip (1727KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
TO-263 (NDR) | 7 | View options |
Ordering & quality
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- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
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