company blog about Original TI LM27402SQ High-Performance Synchronous Buck Controller With DCR Current Sensing

Original TI LM27402SQ High-Performance Synchronous Buck Controller With DCR Current Sensing

Shenzhen Mingjiada Electronics Co., Ltd.——Long Term Supply TI (LM27402SQ) Synchronous Buck Controller, Below are product details for LM27402SQ:

LM27402SQ——Basic Information:
Part Number: LM27402SQ
Package: WQFN-16
Type: Synchronous DC/DC Step-Down Controller
Product Details: LM27402SQ——3V to 20V, voltage mode synchronous buck controller with DCR current sensing.

LM27402SQ——Product Attributes

Output Type: Transistor Driver
Function: Step-Down
Output Configuration: Positive
Topology: Buck
Number of Outputs: 1
Output Phases: 1
Voltage - Supply (Vcc/Vdd): 3V ~ 20V
Frequency - Switching: 200kHz ~ 1.2MHz
Duty Cycle (Max): 95%
Synchronous Rectifier: Yes
Clock Sync: Yes
Control Features: Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking
Operating Temperature: -40°C ~ 125°C (TJ)
Mounting Type: Surface Mount
Package / Case: 16-WQFN Exposed Pad
Supplier Device Package: 16-WQFN (4x4)

LM27402SQ is a voltage-mode, synchronous, DC/DC step-down controller with lossless inductor DCR current sensing capability.

LM27402SQ——Sensing the inductor current eliminates the need to add resistive powertrain elements, which increases overall efficiency and facilitates accurate, continuous current sensing. A 0.6-V ±1% voltage reference enables high accuracy and low voltage capability at the output. An input operating voltage range of 3 V to 20 V makes the LM27402SQ suitable for a large variety of input rails.

LM27402SQ voltage-mode control loop incorporates input voltage feed forward to maintain stability throughout the entire input-voltage range. The switching frequency is adjustable from 200 kHz to 1.2 MHz.

LM27402SQ——Dual, high-current, integrated MOSFET drivers support large QG, low RDS(on) power MOSFETs. A power-good indicator provides power-rail-sequencing capability and output fault detection. An adjustable external soft start limits inrush current and provides monotonic output control during start-up.

LM27402SQ——Other features include external tracking of other power supplies, integrated LDO bias supply, and synchronization capability.

LM27402SQ——Key Features
Wide Input-Voltage Range of 3 V to 20 V
Inductor DCR or Shunt Resistor Based Overcurrent Protection
0.6-V Reference With ±1% FB Accuracy Across Full –40°C to 125°C Junction Temperature Range
Switching Frequency from 200 kHz to 1.2 MHz
Output Voltage as High as 95% of Input Voltage
Integrated High-Current MOSFET Drivers
Internal VDD Bias Supply LDO Subregulator
External Clock Synchronization
Adjustable Soft Start With External Capacitor
Prebiased Start-up Capability
Power Supply Tracking
Voltage-Mode Control With Line Feedforward
Open-Drain Power-Good Indicator
Precision Enable With Hysteresis

LM27402SQ——Applications
High-Current, Low-Voltage Supply for FPGA and ASIC
General-Purpose, High-Current Buck Converters
DC/DC Converters and POL Modules
Telecom, Datacom, Networking, Distributed Power Architectures

LM27402SQ——Typical Application Circuit

[Mingjiada Electronics] Long Term Supply TI (LM27402SQ) Synchronous DC/DC Step-Down Controller, For more product information about LM27402SQ or to request a quotation, please visit the official website of Mingjiada Electronics (https://www.integrated-ic.com/).