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reference designLT7930

Analog Devices LT7930

72V, Parallelable, 4-Switch Buck-Boost Controller for GaN FETs and Si MOSFETs

Overview

TopologyBuck-Boost Converter
Input voltage5-72 V
Switching frequency80-1280 kHz
Output 165 V / 41.6 A
Output 265 V / 25 A
IC revisionRev. 0

Description

The LT7930 is a high-performance, buck-boost switching regulator controller that operates from an input voltage above, below, or equal to the output voltage. The constant-frequency, peak current mode architecture allows a phase-lockable switching frequency of up to 1MHz, while a programmable input or output current loop regulates the average input or output current for accurately supporting battery charging applications. With a wide 5V to 72V input and output range and seamless, low-noise transitions between operating regions, the LT7930 is ideal for 48V input systems. The LT7930 features forced continuous mode (FCM)/ pulse-skipping mode operation. It supports multiphase/ multi-IC parallel operation for high-power applications. The LT7930 includes 5V optimized N-channel gate drivers to drive GaN FETs or NMOS FETs. Its dead time can be continuously programmed with an external resistor, allowing short dead time for GaN FETs or longer dead time for Si MOSFETs in order to maximize efficiency. The LT7930 also provides VIN overvoltage protection, smart EXTVCC auxiliary supply, and programmable inductor peak current limit. A PGOOD pin indicates when the output is within 10% of its designed set point. The LT7930 is packaged in a low-profile, 48-lead LFCSP that is compliant with the IPC-9592 high-voltage pin spacing standard.

Features

Wide VIN Voltage Range: 5V to 72VSingle Inductor Architecture Allows VIN Above, Below, or Equal to the Regulated VOUTSynchronous Rectification: Up to 99% EfficiencyCompatible with GaN FETs and Si MOSFETs±1% Output Voltage Accuracy: 1V ≤ VOUT ≤ 70VDCR or RSENSE Current SensingPeak Current-Mode Control in Buck/Boost/Buck- Boost ModeProgrammable Input or Output Current RegulationContinuously Programmable Dead Time (0ns to 100ns)Phase-Lockable Frequency (150kHz to 1MHz)Multiphase/Multi-IC Parallel OperationVIN Overvoltage ProtectionSelectable Continuous or Pulse-Skipping Mode Operation and Inductor Peak Current Limits48-Lead, 7mm × 7mm LFCSP with Exposed Pad Package, IPC-9592 High-Voltage Spacing Compliant

Typical applications

More information

Parts approved by Analog Devices

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Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC max.(mΩ)
fres(MHz)
Wire Type
SamplesAvailability & Sample
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7443630220
SPECWE-HCF SMT High Current Inductor, 2.2 µH, 39.5 A
Simu­lation
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Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-HCF SMT High Current Inductor
Inductance2.2 µH
Performance Rated Current39.5 A
Saturation Current @ 10%47 A
Saturation Current @ 30%52 A
DC Resistance1.65 mΩ
Self Resonant Frequency32 MHz
Wire TypeFlat 
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7443640680
SPECWE-HCF SMT High Current Inductor, 6.8 µH, 34.95 A
Simu­lation
Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-HCF SMT High Current Inductor
Inductance6.8 µH
Performance Rated Current34.95 A
Saturation Current @ 10%49.8 A
Saturation Current @ 30%55 A
DC Resistance2.64 mΩ
Self Resonant Frequency17 MHz
Wire TypeFlat 
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