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Conv DC-DC 2.95V to 5.5V Synchronous Step Down Single-Out 0.8V to 5V 5A Automotive 16-Pin HTSSOP EP T/R

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LM20145QMHE/NOPB General Description

The LM20145 is a full featured adjustable frequency synchronous buck regulator capable of delivering up to 5A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suited for a wide variety of low voltage systems.

The device features internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn-on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing is possible with the integrated power good circuit.

The LM20145 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20145 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.

The frequency of this device can be adjusted from 250 kHz to 750 kHz by connecting an external resistor from the RT pin to ground.

The LM20145 is offered in a 16-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heatsinks.

Texas Instruments, Inc Inventory

Key Features

  • Available in AEC-Q100 Temperature Grade 1
  • Input Voltage Range 2.95V to 5.5V
  • Accurate Current Limit Minimizes Inductor Size
  • 97% Peak Efficiency
  • Adjustable Switching Frequency (250 kHz to 750 kHz)
  • 32 mΩ Integrated FET Switches
  • Starts up into Pre-Biased Loads
  • Output Voltage Tracking
  • Peak Current Mode Control
  • Adjustable Output Voltage down to 0.8V
  • Adjustable Soft-Start with External Capacitor
  • Precision Enable Pin with Hysteresis
  • Integrated OVP, UVLO, Power Good and Thermal Shutdown
  • HTSSOP 16-Pin Exposed Pad Package

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Texas Instruments, Inc Original Stock
Texas Instruments, Inc Inventory


Vin (min) (V) 2.95 Vin (max) (V) 5.5
Vout (min) (V) 0.8 Vout (max) (V) 5
Iout (max) (A) 5 Iq (typ) (mA) 3.5
Switching frequency (min) (kHz) 250 Switching frequency (max) (kHz) 750
Features Enable, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Operating temperature range (°C) -40 to 125
Rating Automotive Regulated outputs (#) 1
Control mode current mode Duty cycle (max) (%) 85
Type Converter feature-type Synchronous Step Down
feature-isolation feature-process-technology
feature-output-type Adjustable feature-switching-frequency-khz 260 to 750
feature-number-of-outputs 1 feature-output-voltage-v 0.8 to 5
feature-maximum-output-current-a 5 feature-maximum-output-power-w
feature-minimum-input-voltage-v 2.95 feature-maximum-input-voltage-v 5.5
feature-typical-switch-current-a feature-efficiency- 97
feature-packaging Tape and Reel feature-rad-hard
feature-pin-count 16 feature-supplier-package HTSSOP EP
feature-standard-package-name1 SOP feature-cecc-qualified No
feature-esd-protection Yes feature-escc-qualified
feature-military No feature-aec-qualified Yes
feature-aec-qualified-number AEC-Q100 feature-auto-motive Yes
feature-p-pap Yes feature-eccn-code EAR99
feature-svhc No


Shipping Method

Our products are mainly transported and delivered by DHL, FedEx, UPS and other logistics partners on site -- Available to 200+ countries.

Delivery Time

The delivery time is usually within 2-7 days, depending on the logistics provider and the area of delivery.

The following are the estimated delivery times of some logistics service providers.

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We accept TT prepayment (bank transfer), paypal, credit cards, Western Union, Money Gram.

Checks and other instruments are not supported to pay for orders and customers are required to pay all possible fees, including sales tax,
customs fees, etc.

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Our policies and procedures are designed to ensure compliance with various quality specifications and to quickly resolve quality-related issues.

We promise to provide 365 days quality assurance service for all our products.

If you have any dissatisfaction with the quality of the product you received, you can contact us for a refund or exchange, as long as the product is kept in its original condition.


AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.
  • ESD


  • Tape and Reel

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LM20145QMHE/NOPB Datasheet PDF

Preliminary Specification LM20145QMHE/NOPB PDF Download

LM20145QMHE/NOPB PDF Preview

Buying Guide

  • What is the lifespan of LM20145QMHE/NOPB?

    The lifespan of LM20145QMHE/NOPB depends on various factors such as the quality of materials used, operating conditions, and the manufacturer's recommended usage time. The datasheet provided by the manufacturer specifies the expected lifespan of the product.

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