Overview

The LT8362 (LT8362EMSE / LT8362HDD) is a high-efficiency 60V, 2A low-EMI switching regulator IC manufactured by Analog Devices (Linear Technology). Packaged in a compact 16-lead MSOP or 10-lead DFN (3×3 mm3 \times 3\text{ mm}), it can be configured in Boost, SEPIC (Step-Up/Step-Down), or Inverting (Negative Output) topologies.

Operating over a wide input supply voltage range of 2.8V to 60.0V DC, the LT8362 features an integrated 60V, 2.0A power switch, an ultra-low 9 μA9\ \mu\text{A} quiescent current in Burst Mode operation, Spread Spectrum Frequency Modulation (SSFM) for low-EMI compliance, and programmable switching frequencies from 300 kHz to 2.0 MHz.

Quick reference

Input Supply Voltage (VIN)2.8 V to 60.0 V DC
Output Voltage LimitUp to 60.0 V60.0\text{ V} DC (Positive or Negative output)
Integrated Power Switch60 V,2.0 A60\text{ V}, 2.0\text{ A} continuous switch rating
Quiescent Current (IQ)9 μA9\ \mu\text{A} typical (Burst Mode operation)
Programmable Frequency300 kHz300\text{ kHz} to 2.0 MHz2.0\text{ MHz} (Syncable to external clock)
EMI MitigationSpread Spectrum Frequency Modulation (SSFM)
Topologies SupportedBoost, SEPIC, Inverting (Single feedback pin FB senses positive or negative output)
Package16-lead MSOP (PowerPAD) / 10-lead DFN (3×3 mm3 \times 3\text{ mm})

Pinout (16-Lead MSOP Package — PowerPAD)

text
                       ┌─────────────┐
                 [EN] 1│ 1        16│ [SW] (Switch Drain Output 60V)
               [SYNC] 2│            │15 [SW]
                [BIAS]3│   LT8362   │14 [VIN] (2.8V to 60V Input)
               [INTVCC]4│   MSOP-16E │13 [VIN]
                 [FB] 5│            │12 [GND]
                 [SS] 6│            │11 [GND]
                 [RT] 7│            │10 [VC] (Compensation Node)
                 [NC] 8│            │9  [NC]
                       └─────────────┘
Pin NameTypeDescription
EN/UVLOInputActive-HIGH Enable & Undervoltage Lockout Input
SYNC/MODEInputClock Synchronization & Mode Select (Burst Mode / Pulse-Skipping / SSFM)
BIASInputInternal Regulator Bias Power Input (Connect to Output for higher efficiency)
INTVCCPowerInternal 3.2V3.2\text{V} LDO Regulator Output (Bypass with 1.0µF capacitor)
FBInputSingle Feedback Input Pin (Senses Positive or Negative Output Voltages)
SSInputSoft-Start Programming Pin (Connect capacitor to GND)
RTInputFrequency Programming Resistor Pin (Connect resistor RTR_T to GND)
VCOutputError Amplifier Output Node for Loop Compensation
VINPowerMain Power Supply Input (+2.8V to +60V DC)
SWOutputInternal 60V 2A Power Switch Drain Pins

Specifications

ParameterSymbolMinTypMaxUnitConditions
Operating Supply VoltageVINV_{IN}2.812.0/24.060.0VDC
Switch Current LimitISWI_{SW}2.02.5—AVIN=12VV_{IN} = 12\text{V}
Switch On-ResistanceRDS(on)R_{DS(on)}—165240mΩVINTVCC=3.2VV_{INTVCC} = 3.2\text{V}
Positive Feedback VoltageVFB+V_{FB+}1.571.601.63VPositive Output Mode
Negative Feedback VoltageVFB−V_{FB-}-100+10mVNegative Output Mode (VFBV_{FB} grounded through internal resistor)

Common mistakes

  • Forgetting ground plane connection on MSOP PowerPAD: Thermal dissipation at 2A2\text{A} switch currents relies on soldering the exposed metal pad beneath the MSOP-16E package to a solid PCB ground plane.
  • Applying >60V> 60\text{V} to SW pins: Inductive ringing spikes on SW (Pin 15/16) must not exceed 60V60\text{V}. Use a snubber circuit in high-voltage SEPIC/Boost configurations.

Notes

  • LT8362 vs LM2577: LT8362 operates at 2.0 MHz with 9µA quiescent current and low EMI SSFM in a tiny 3x3mm DFN package; LM2577 is a legacy 52kHz bulky TO-220 part.

Assets & downloads