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reference designLT80603

Analog Devices LT80603

3V to 65V, 2.5A/3.5A/4.5A Synchronous Step-Down Silent Switcher with 8μA Quiescent Current

Overview

TopologyBuck Converter
Input voltage3-65 V
Switching frequency200-3000 kHz
Output 15 V / 0.01 A
Output 23.3 V / 0.01 A
IC revision1

Description

The LT8060x and LT8060xHV step-down regulators family feature the Silent Switcher® architecture to minimize electromagnetic interference (EMI) emissions while delivering high efficiency at frequencies up to 3MHz. The LT80602 and LT80602HV deliver up to 2.5A continuous current, the LT80603 and LT80603HV support up to 3.5A, and the LT80603A and LT80603AHV provide up to 4.5A continuous current. An ultralow 8μA quiescent current, with the output in full regulation, enables applications requiring the highest efficiency at light loads. An accurate enable threshold can be set using the EN/UV pin and a resistor at the RT pin to program the switch frequency.

Features

Silent Switcher® Architecture Ultralow EMI Emissions
 Spread Spectrum Frequency Modulation
 High Efficiency at High Frequency Up to 94.3% at 400kHz, 90% at 2.1MHz,
24VIN to 5VOUT Up to 95.6% at 400kHz, 91.1% at 2.1MHz,48VIN to 12VOUT Pin Selectable Fixed 3.3V, Fixed 5V, or AdjustableOutput from 0.8V to 99% of VIN Low Quiescent Current Burst Mode Operation 8μA IQ Regulating 24VIN to 5VOUT On-the-Fly Mode Change Among Burst Mode, PulseSkipping Mode, and FCM Built-in Output-Voltage Monitoring and DieTemperature Monitoring with PG/TJ 200kHz to 3MHz Adjustable Switching Frequencywith External Clock Synchronization 80V Transient-Input Tolerant (LT8060xHV) Programmable Soft-Start and Tracking
 Small 17-Lead 3mm × 3mm Quad Flat No-lead (QFN)

More information

Products

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Data­sheet
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Status
Product series
Z @ 100 MHz(Ω)
Zmax(Ω)
IR(A)
RDC(mΩ)
Type
SamplesAvailability & Sample
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78279221281
SPECWE-MPSA EMI Multilayer Power Suppression Bead, 280 Ω, 288 Ω
Availability
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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-MPSA EMI Multilayer Power Suppression Bead
Impedance @ 100 MHz280 Ω
Maximum Impedance288 Ω
Rated Current3.5 A
DC Resistance35 mΩ
TypeHigh Current 
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