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LT8614EUDC#TRPBF

42V 4A Silent Switcher Buck Regulator, 2.5uA IQ, 3MHz, QFN-18, AEC-Q100

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Pieza del fabricante：

LT8614EUDC#TRPBF

Paquete：

QFN-18 (3 x 4 x 0.75 mm, exposed pad)

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Descripción

Productos

The LT8614EUDC#TRPBF from Analog Devices is a 42 V, 4 A synchronous step-down Silent Switcher regulator with ultralow 2.5 µA quiescent current. It features Silent Switcher architecture to minimize EMI emissions while delivering up to 96% efficiency at frequencies up to 3 MHz. The device is housed in an 18-lead 3 mm x 4 mm QFN package with exposed pad and is AEC-Q100 qualified for automotive applications.

Especificaciones

Topology Synchronous Buck (Silent Switcher)
Input Voltage 3.4 V to 42 V
Output Voltage 0.97 V to V_IN (Adjustable)
Corriente de salida 4 A
Switching Frequency 200 kHz to 3 MHz (Adjustable)
Quiescent Current (Burst Mode) 2.5 µA
Min On-Time 30 ns
Dropout Voltage 125 mV at 1 A
Reference Voltage 0.97 V
Paquete QFN-18 (3 x 4 x 0.75 mm, EP)
Temperatura de funcionamiento -40°C to 125°C
Cualificación AEC-Q100

Características

  • Silent Switcher architecture for ultralow EMI emissions
  • Up to 96% efficiency at 1 MHz, 12 V_IN to 5 V_OUT
  • 2.5 µA quiescent current in Burst Mode with output in regulation
  • Output ripple below 10 mV_P-P at all loads
  • 30 ns minimum switch on-time for high V_IN to low V_OUT
  • Low dropout: 125 mV at 1 A under all conditions
  • Safe operation during inductor saturation in overload
  • Adjustable and synchronizable frequency: 200 kHz to 3 MHz
  • Accurate 1 V enable pin threshold for programmable UVLO
  • Internal compensation, soft-start, and output tracking

Aplicaciones

  • Automotive and industrial power supplies
  • General purpose step-down converters
  • GSM and RF power supplies with low EMI
  • Post-regulation from 12 V / 24 V / 48 V buses
  • Battery-powered systems requiring ultralow standby current

The LT8614EUDC#TRPBF from Analog Devices (formerly Linear Technology) is a 42 V, 4 A synchronous step-down regulator featuring Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at frequencies up to 3 MHz. Assembled in a compact 3 mm x 4 mm QFN package, the monolithic construction integrates power switches and all necessary circuitry for minimal PCB footprint. The ultralow 2.5 µA quiescent current in Burst Mode—with output in full regulation—enables highest efficiency at very small load currents. Output ripple remains below 10 mV_P-P from zero to full current. The 30 ns minimum on-time allows high V_IN to low V_OUT conversion at high frequencies.

The LT8614 uses a constant-frequency peak current-mode control architecture with integrated high-side and low-side N-channel MOSFET switches (85 mOhm top, 40 mOhm bottom). The Silent Switcher architecture distributes the input current through symmetrical inductor pairs and utilizes copper pillars in the flip-chip package to minimize parasitic inductance and thus radiated EMI. The oscillator frequency is programmed via an external RT resistor (200 kHz to 3 MHz). In Burst Mode operation, the device delivers pulses to maintain regulation and then enters sleep mode where both MOSFETs and most circuitry shut off, achieving 2.5 µA IQ. The SYNC/MODE pin allows external clock synchronization and selection of Burst Mode or pulse-skipping mode. The TR/SS pin provides soft-start and output tracking. The EN/UV pin with 1 V threshold enables programmable undervoltage lockout.

Pin Nombre Tipo Función
1 BST Potencia Bootstrap capacitor for top switch
2 SW Salida Switch node output
3 SW Salida Switch node output
4 VIN Potencia Input supply voltage
5 VIN Potencia Input supply voltage
6 EN/UV Entrada Enable / undervoltage lockout (1V threshold)
7 VFB Entrada Feedback voltage sense (0.97V reference)
8 RT Entrada Frequency set resistor
9 SYNC/MODE E/S External sync / mode select
10 PG Salida Power good (open drain)
11 TR/SS E/S Soft-start / tracking
12 BIAS Potencia Bias supply input
13 INTVCC Potencia Internal regulator bypass
14 GND Suelo Signal ground
15-18 GND/NC Ground/- Ground and no-connect
Tampón GND Suelo Exposed thermal pad
  • Automotive infotainment and ADAS power supplies
  • Industrial 24V/48V bus step-down converters
  • GSM and RF power systems requiring low EMI
  • Battery-powered IoT with ultralow standby current
  • Post-regulation for high-voltage front-end supplies
Fabricante Número de pieza Paquete Notas
Dispositivos analógicos LT8614IUDC#TRPBF QFN-18 -40°C to 125°C I-grade
Dispositivos analógicos LT8645SIV#TRPBF QFN-20 42V, 5A Silent Switcher 2
Texas Instruments LM53603NQDSXR QFN-12 36V, 3A, low EMI buck
Texas Instruments TPS54560DDAR HSOIC-8 42V, 5A buck converter
Monolithic Power MP8759GD-Z QFN-18 36V, 5A synchronous buck
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Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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