IC-Hersteller Texas Instruments

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Texas Instruments LM5148-Q1

Automotive, 80-V synchronous buck DC/DC controller with ultra-low IQ

Details

TopologieAbwärtswandler
Eingangsspannung5.5-36 V
Schaltfrequenz100-2200 kHz
Ausgang 15 V / 8 A

Beschreibung

The LM5148-Q1 is a 80-V, ultra-low IQ synchronous buck DC/DC controller for high-current, single-output applications. The controller uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The LM5148-Q1 can be set up in idual-phase mode (paralleled output) with accurate current sharing for high-current applications. It can operate at input voltages as low as 3.5 V, at nearly 100% duty cycle if needed.The LM5148-Q1 has a unique EMI reduction feature known as dual random spread spectrum (DRSS). Combining low-frequency triangular and high-frequency random modulations mitigates EMI disturbances across lower and higher frequency bands, respectively. This hybrid technique aligns with the multiple resolution bandwidth (RBW) settings specified in industry-standard EMC tests.Additional features of the LM5148-Q1 include 150°C maximum junction temperature operation, user-selectable diode emulation for lower current consumption at light-load conditions, open-drain power-good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated VCC bias supply regulator, internal 3-ms soft-start time, and thermal shutdown protection with automatic recovery.The LM5148-Q1 controller comes in a 3.5-mm × 5.5-mm thermally enhanced, 24-pin VQFN package with wettable flank pins to facilitate optical inspection during manufacturing.

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 80 V
  • 1% accurate, fixed 3.3 V, 5 V, 12 V, or adjustable output from 0.8 V to 55 V
  • 150°C maximum junction temperature
  • Lossless DCR or shunt current sensing
  • Shutdown mode current of 2.3 µA
  • No-load sleep current of 9.5 µA
  • Internal soft-start ramp of 3 ms
  • 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 LM5148-Q1 with WEBENCH Power Designer

Typische Anwendungen

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

Weiterführende Informationen

Artikeldaten

Artikel Nr. Daten­blatt Simu­lation Downloads Status ProduktserieL
(µH)
IRP,40K
(A)
ISAT1
(A)
ISAT,30%
(A)
RDC max.
(mΩ)
fres
(MHz)
Montageart Muster
744373490056SPEC

Anstehende PCN

Aufgrund einer anstehenden PCN wird sich in Kürze das Datenblatt des ausgewählten Produktes ändern. Anbei finden Sie das neue Datenblatt, sowie das noch gültige Datenblatt. Bei weiteren Fragen wenden Sie sich bitte an Ihren Vertriebsmitarbeiter.

8 Dateien Aktiv i| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.WE-LHMI SMT Speicherdrossel 0.56 17.6 19.9 36.4 4.2 85 SMT
Artikel Nr. Daten­blatt Simu­lation
744373490056SPEC

Anstehende PCN

Aufgrund einer anstehenden PCN wird sich in Kürze das Datenblatt des ausgewählten Produktes ändern. Anbei finden Sie das neue Datenblatt, sowie das noch gültige Datenblatt. Bei weiteren Fragen wenden Sie sich bitte an Ihren Vertriebsmitarbeiter.

Muster
Artikel Nr. Daten­blatt Simu­lation Downloads Status ProduktserieL
(µH)
IRP,40K
(A)
ISAT1
(A)
ISAT,30%
(A)
RDC max.
(mΩ)
fres
(MHz)
Montageart Muster