Texas Instruments LM25148-Q1

Description

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.

Features

• 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

Typical applications

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

More information

• Datasheet
• IC product information