24-pin (RTW) package image

LM27403SQE/NOPB ACTIVE

3-V to 20-V voltage-mode synchronous buck controller and temperature-compensated DCR current sensing

ACTIVE custom-reels CUSTOM Custom reel may be available

Pricing

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Additional package qty | Carrier options These products are exactly the same but come in a different carrier type

LM27403SQ/NOPB ACTIVE custom-reels CUSTOM Custom reel may be available
Package qty | Carrier 1,000 | SMALL T&R
Inventory
Qty | Price 1ku | +
LM27403SQX/NOPB ACTIVE custom-reels CUSTOM Custom reel may be available
Package qty | Carrier 4,500 | LARGE T&R
Inventory
Qty | Price 1ku | +

Quality information

Rating Catalog
RoHS Yes
REACH Yes
Lead finish / Ball material SN
MSL rating / Peak reflow Level-1-260C-UNLIM
Quality, reliability
& packaging information

Information included:

  • RoHS
  • REACH
  • Device marking
  • Lead finish / Ball material
  • MSL rating / Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
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Additional manufacturing information

Information included:

  • Fab location
  • Assembly location
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Export classification

*For reference only

  • US ECCN: EAR99

Packaging information

Package | Pins WQFN (RTW) | 24
Operating temperature range (°C) -40 to 125
Package qty | Carrier 250 | SMALL T&R

Features for the LM27403

  • Up to 97% Efficiency and 93% Duty Cycle
  • Wide Input Voltage Range of 3 V to 20 V
  • Switching Frequency From 200 kHz to 1.2 MHz
  • Inductor-DCR-Based Overcurrent Protection With
    Thermal Compensation
  • 0.6-V Reference With 1% Feedback Accuracy
  • 30-ns Min On-Time for Low VOUT
  • Integrated High-Current MOSFET Drivers
    • Adaptive Deadtime Control
  • Ultrafast Line and Load Transient Response
    • High GBW Error Amplifier
    • PWM Line Feedforward
  • Integrated VDD Bias Supply LDO Subregulator
  • Programmable System-Level OTP
  • Precision Enable With Hysteresis
  • Frequency Synchronization
  • Monotonic Prebiased Start-up
  • Programmable Soft-Start With Tracking
  • Output Remote Sense
  • Open-Drain Power Good Indicator
  • 4-mm x 4-mm WQFN-24 PowerPAD™ Package

Description for the LM27403

The LM27403 is a feature-rich, easy-to-use, synchronous buck controller offering exceptional levels of integration and performance for superior efficiency in high power density, point-of-load (POL) DC-DC regulator solutions. The resistor-programmable switching frequency from 200 kHz to 1.2 MHz and integrated, high-current MOSFET gate drivers with adaptive deadtime offer flexibility to optimize solution size and maximize conversion efficiency.

High precision and low output voltage are easily obtained with a 0.6-V, 1% accurate voltage reference together with a 30-ns high-side MOSFET minimum controllable on-time. Using lossless inductor dc resistance (DCR) current sensing and an inexpensive 2N3904 BJT to sense temperature remotely at the inductor, the LM27403 supports accurate and thermally compensated overcurrent protection (OCP).

The LM27403 has a conventional voltage-mode control loop with high gain-bandwidth error amplifier and PWM input voltage feedforward to simplify compensation design and enable excellent transient response throughout the full line voltage and load current ranges. Forced-PWM (FPWM) operation eliminates frequency variation to minimize EMI in sensitive applications. An open-drain Power Good circuit provides power-rail sequencing and fault reporting. Other features include programmable system-level thermal shutdown with automatic recovery, output voltage remote sense, configurable soft-start, monotonic start-up into prebiased loads, an integrated bias supply low-dropout (LDO) regulator, external power supply tracking, precision enable with customizable hysteresis for programmable line undervoltage lockout (UVLO), and synchronization capability for beat frequency sensitive and multiregulator applications. The LM27403 is offered in a 4-mm x 4-mm thermally enhanced WQFN-24 package with 0.5-mm pitch.

Pricing

Qty Price
+

Additional package qty | Carrier options These products are exactly the same but come in a different carrier type

LM27403SQ/NOPB ACTIVE custom-reels CUSTOM Custom reel may be available
Package qty | Carrier 1,000 | SMALL T&R
Inventory
Qty | Price 1ku | +
LM27403SQX/NOPB ACTIVE custom-reels CUSTOM Custom reel may be available
Package qty | Carrier 4,500 | LARGE T&R
Inventory
Qty | Price 1ku | +

Carrier options

You can choose different carrier options based on the quantity of parts, including full reel, custom reel, cut tape, tube or tray.

A custom reel is a continuous length of cut tape from one reel to maintain lot- and date-code traceability, built to the exact quantity requested. Following industry standards, a brass shim connects an 18-inch leader and trailer on both sides of the cut tape for direct feeding into automated assembly machines. TI includes a reeling fee for custom reel orders.

Cut tape is a length of tape cut from a reel. TI may fulfill orders using multiple strips of cut tapes or boxes to satisfy the quantity requested.

TI often ships tube or tray devices inside a box or in the tube or tray, depending on inventory availability. We pack all tapes, tubes or sample boxes according to internal electrostatic discharge and moisture-sensitivity-level protection requirements.

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Lot and date code selection may be available

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