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reference designLT83402 | Demoboard EVAL-LT83402-AZ

Analog Devices LT83402 | Demoboard EVAL-LT83402-AZ

42V, 1A/2.5A Step-Down Silent Switcher 3 with Ultra-Low Noise Reference

Overview

TopologyBuck Converter
Input voltage4.8-42 V
Output 13.3 V / 2.5 A

Description

The EVAL-LT83401-AZ and EVAL-LT83402-AZ (abbreviated as EVAL-LT83401/2-AZ) demonstration boards are 42V, 1A, and 2.5A synchronous Silent Switcher® 3 step-down regulators with ultra-low noise, high efficiency, and power density, featuring the LT83401 and LT83402 (abbreviated as LT83401/2), respectively. The input voltage range of the EVAL-LT83401/2-AZ is 4.8V to 42V. The default demo board setting is 3.3V output with a maximum 1A/2.5A DC output current. The LT83401/2 is a compact, ultra-low noise, ultra-low emission, high efficiency, and high-speed synchronous monolithic step-down switching regulator. The uniquely designed combination of the ultra-low noise reference and third-generation Silent Switcher architecture enables the LT83401/2 to achieve both high efficiency and excellent wideband noise performance. A minimum on-time of 22ns allows high VIN to low VOUT conversion at high frequency.

Features

Silent Switcher® 3 ArchitectureUltra-Low RMS Noise (10Hz–100kHz): 2.8μVRMSUltra-Low Spot Noise: 4nV/√Hz at 10kHzUltra-Low EMI EmissionsUltra-Fast Transient ResponseMinimizes the Output CapacitanceHigh Efficiency at High FrequencyUp to 92.4% Efficiency at 2MHz, 12VIN to 5VOUTInput Voltage Range: 2.8V to 42VOutput Voltage Range: 0V to (VIN - 1V)Unity Gain Configuration Up to 15VOUTFast Minimum Switch On-Time: 22nsPrecision Reference: ±0.8% Over Temperature with Remote SenseForced Continuous Mode CapabilityAdjustable and Synchronizable: 300kHz to 6MHz;Programmable Power GoodTiny, 15-Lead 3mm x 2mm LFCSP Package;Pin-to-Pin Compatible Family: LT83201 (18V, 1A), LT83203 (18V, 3A), and LT83205 (18V, 5A)AEC-Q100 Qualification in Progress

Typical applications

More information

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Order Code
Data­sheet
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Status
Product series
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
fres(MHz)
VOP(V)
Mount
SamplesAvailability & Sample
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74438356047
SPECWE-MAPI SMT Power Inductor, 4.7 µH, 4 A

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

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Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance4.7 µH
Performance Rated Current4 A
Saturation Current @ 30%5.75 A
DC Resistance63 mΩ
Self Resonant Frequency22 MHz
Operating Voltage80 V
MountSMT 
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