IC-Hersteller Texas Instruments

IC-Hersteller (108)

Texas Instruments LM25148-Q1

Automotive 42-V synchronous buck DC/DC controller with ultra-low IQ

Details

TopologieAbwärtswandler
Eingangsspannung3.5-42 V
Schaltfrequenz100-2200 kHz
Ausgang 112 V / 3.2 A
IC-RevisionA

Beschreibung

The LM25148-Q1 is a 42-V, ultra-low IQ synchronousbuck DC/DC controller for high-current, single-outputapplications. The controller uses a peak current-modecontrol architecture for easy loop compensation,fast transient response, and excellent load and lineregulation. The LM25148-Q1 can be set up in idual-phase mode (paralleled output) with accurate currentsharing for high-current applications. It can operate atinput voltages as low as 3.5 V, at nearly 100% dutycycle if needed.The LM25148-Q1 has a unique EMI reductionfeature known as dual random spread spectrum(DRSS). Combining low-frequency triangular andhigh-frequency random modulations mitigates EMIdisturbances across lower and higher frequencybands, respectively. This hybrid technique aligns withthe multiple resolution bandwidth (RBW) settingsspecified in industry-standard EMC tests.

Eigenschaften

  • AEC-Q100 qualified for automotive applications:
  • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Functional Safety-Capable
  • Documentation available to aid functional safety system design
  • Integrated EMI mitigation
  • Selectable dual random spread spectrum (DRSS) feature for enhanced EMI performance across low and high-frequency bands
  • Optimized for CISPR 25 Class 5 requirements
  • 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 output from 0.8 V to 36 V
  • 150°C maximum junction temperature
  • Lossless DCR or shunt current sensing
  • Shutdown mode current of 2.3μA
  • No-load sleep current of 9.5μA
  • Internal soft-start ramp of 3ms
  • Stackable up to two phases
  • Internal bootstrap diode
  • Switching frequency from 100 kHz to 2.2 MHz
  • SYNC in and SYNC out capability
  • Selectable PFM or FPWM modes
  • 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 LM25148-Q1with WEBENCH® Power Designer

Typische Anwendungen

  • Automotive electronic systems, Advanced driver assistance systems (ADAS), Infotainment and clusters, Body electronics

Weiterführende Informationen

Von Texas Instruments freigegebene Bauteile

Jetzt einloggen, um Verfügbarkeiten zu sehen und Verfügbarkeitsprognosen anzufragen. LOGIN
Artikel Nr.
Daten­blatt
Simu­lation
Downloads
Status
Produktserie
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC max.(mΩ)
fres(MHz)
Montageart
MusterVerfügbarkeit & Muster
Jetzt einloggen, um Verfügbarkeiten zu sehen und Verfügbarkeitsprognosen anzufragen. LOGIN
SPECWE-LHMI SMT Speicherdrossel, 0.56 µH, 17.6 A
Simu­lation
Verfügbarkeit
Status
AktivProduktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.
iProduktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.
Induktivität0.56 µH
Performance Nennstrom17.6 A
Sättigungsstrom 119.9 A
Sättigungsstrom @ 30%36.4 A
Gleichstromwiderstand4.2 mΩ
Eigenresonanzfrequenz85 MHz
MontageartSMT 
Verfügbarkeit prüfen
SPECWE-LHMI SMT Speicherdrossel, 2.2 µH, 14.3 A
Simu­lation
Verfügbarkeit
Status
AktivProduktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.
iProduktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.
Induktivität2.2 µH
Performance Nennstrom14.3 A
Sättigungsstrom 118.1 A
Sättigungsstrom @ 30%38.7 A
Gleichstromwiderstand7 mΩ
Eigenresonanzfrequenz27 MHz
MontageartSMT 
Verfügbarkeit prüfen