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LM5143QRWGRQ1 +BOM
This product is AEC-Q100 qualified, ensuring superior performance and reliability in automotive environments
VQFNP-40-
Manufacturer:
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Mfr.Part #:
LM5143QRWGRQ1
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Datasheet:
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Series:
Automotive, AEC-Q100
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Output Type:
Transistor Driver
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Function:
Step-Down
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Output Configuration:
Positive
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EDA/CAD Models:
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LM5143QRWGRQ1 General Description
The LM5143-Q1 is a 65-V synchronous buck DC/DC controller for high-current single or dual outputs. The device uses an interleaved, stackable, peak current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with paralleled phases for higher output current. A high-side switch minimum on-time of 65 ns gives large step-down ratios, enabling the direct conversion from 12-V, 24-V, or 48-Vautomotive inputs to low-voltage rails for reduced system complexity and solution cost. The LM5143-Q1 continues to operate during input voltage dips as low as 3.5 V, at nearly 100% duty cycle if needed.
Current is sensed using the inductor DCR for highest efficiency or an optional shunt resistor for high accuracy. The 15-μA no-load quiescent current with the output voltage in regulation extends operating run-time in battery-powered systems. Power the LM5143-Q1 from the output of the switching regulator or another available source for even lower input quiescent current and power loss.
Key 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 - Versatile synchronous buck DC/DC controller
– Wide input voltage range of 3.5 V to 65 V
– 1% accurate, fixed 3.3-V, 5-V, or adjustable
outputs from 0.6 V to 55 V
– 150°C maximum junction temperature
– Shutdown mode current: 4 µA typical
– No-load standby current: 15 µA typical - Two interleaved synchronous buck channels
– Dual-channel or single-output multiphase
– 65-ns tON(min) for high VIN/VOUT ratio
– 60-ns tOFF(min) for low dropout - Inherent protection features for robust design
– Hiccup-mode overcurrent protection
– Independent ENABLE and PGOOD functions
– VCC, VDDA, and gate-drive UVLO protection
– Thermal shutdown protection with hysteresis - Optimized for ultra-low EMI requirements
– Slew-rate controlled adaptive gate drivers
– Spread spectrum reduces peak emissions
– Optimized for CISPR 25 Class 5 requirements - Switching frequency from 100 kHz to 2.2 MHz
– SYNC in and SYNC out capability
– Selectable diode emulation or FPWM - VQFNP-40 pacakge with wettable flank pins
- Create a custom design using the LM5143-Q1 with
WEBENCH® Power Designer
Application
• Automotive electronic systems
• Infotainment systems, instrument clusters
• Advanced driver assistance systems (ADAS)
Specifications
Category | Integrated Circuits (ICs)Power Management (PMIC)DC DC Switching Controllers | Series | Automotive, AEC-Q100 |
Output Type | Transistor Driver | Function | Step-Down |
Output Configuration | Positive | Topology | Buck |
Number of Outputs | 2 | Output Phases | 2 |
Voltage - Supply (Vcc/Vdd) | 3.5V ~ 65V | Frequency - Switching | 100kHz ~ 2.2MHz |
Duty Cycle (Max) | 100% | Synchronous Rectifier | Yes |
Clock Sync | Yes | Serial Interfaces | - |
Control Features | Current Limit, Dead Time Control, Enable, Frequency Control, Power Good, Soft Start | Operating Temperature | -40°C ~ 150°C (TJ) |
Mounting Type | Surface Mount, Wettable Flank | Base Product Number | LM5143 |
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LM5143QRWGRQ1 Datasheet PDF
LM5143QRWGRQ1 PDF Preview
In Stock: 4,319
Minimum Order: 1
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