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reference designLM25149-Q1 | Demoboard LM25149-Q1EVM-2100

Texas Instruments LM25149-Q1 | Demoboard LM25149-Q1EVM-2100

LM25149-Q1 5.5-V to 36-V, low IQ, synchronous buck DC/DC controller evaluation module

Overview

TopologyBuck Converter
Input voltage5.5-36 V
Switching frequency100-2200 kHz
Output 15 V / 8 A
IC revisionA

Description

The LM25149-Q1 is a 42-V synchronous buck DC/DC controller for high-current single-output applications. Refer to the Errata. The device uses peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The LM25149-Q1 can be set up in interleaved mode (paralleled output) with accurate current sharing for high-current applications. The LM25149-Q1 can operate at input voltages as low as 3.5 V, at nearly 100% duty cycle if needed. The LM25149-Q1 has two unique EMI reduction features: active EMI filter and Dual Random Spread Spectrum (DRSS). Active EMI filter senses any noise or ripple voltage on the DC input bus and injects an out-of-phase cancellation signal to reduce the noise or ripple voltage. DRSS combines a low-frequency triangular and high-frequency random modulation to optimize EMI preformance in the low-frequency and high-frequency radio frequency bands.

Features

  • AEC-Q100 qualified for automotive applications:-Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Two integrated EMI mitigation mechanisms-Active EMI filter for enhanced EMI performance at lower frequencies-Dual random spread spectrum (DRSS) for enhanced EMI performance across low and high-frequency bands-EMI reduced by an average of 25 dBµV-Reduces the external differential-mode filter size by 50% and lowers systems cost
  • Versatile synchronous buck DC/DC controller-Wide input voltage range of 3.5 V to 42 V-1% accurate, fixed 3.3-V, 5-V, 12-V, or adjustable outputs from 0.8 V to 36 V-150°C maximum junction temperature-Shutdown mode current: 2.2 µA-No-load standby current: 9 µA
  • Switching frequency from 100 kHz to 2.2 MHz-SYNC in and SYNC out capability
  • Inherent protection features for robust design-Internal hiccup-mode overcurrent protection-ENABLE and PGOOD functions-VCC, VDDA, and gate-drive UVLO protection-Internal or external loop compensation-Thermal shutdown protection with hysteresis
  • Create a custom design using the LM25149-Q1 with WEBENCH Power Designer

Typical applications

  • Automotive electronic systems, infotainment systems, instrument clusters, ADAS
  • High-voltage battery-operated systems

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
fres(MHz)
VOP(V)
Mount
ISAT,10%(A)
RDC max.(mΩ)
SamplesAvailability & Sample
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744373490056
SPECWE-LHMI SMT Power Inductor, 0.56 µH, 17.6 A
Simu­lation
Availability
–
Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-LHMI SMT Power Inductor
Inductance0.56 µH
Performance Rated Current17.6 A
Saturation Current @ 30%36.4 A
DC Resistance3.6 mΩ
Self Resonant Frequency85 MHz
Operating Voltage120 V
MountSMT 
Saturation Current @ 10%19.9 A
DC Resistance4.2 mΩ
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744383560068
SPECWE-MAPI SMT Power Inductor, 0.68 µH, 13.15 A

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
–
Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance0.68 µH
Performance Rated Current13.15 A
Saturation Current @ 30%12.7 A
DC Resistance7.5 mΩ
Self Resonant Frequency75 MHz
Operating Voltage80 V
MountSMT 
Saturation Current @ 10%5.8 A
DC Resistance9 mΩ
–Check availability