RH3845MK
PRODUCTIONRadiation Hardened High Voltage Synchronous Current Mode Step-Down Controller with Adjustable Operating Frequency
- Part Models
- 6
- 1ku List Price
- Starting From $1247.97
Overview
- Processed in Compliance with LTC Certified MIL-PRF-38535 Class V Flow
- High Voltage Operation: Up to 60V
- Review of the published Single Event Reports supplied in the “Radiation Reports” section below is recommended for applications above 30V.
- Output Voltages Up to 36V
- Synchronizable Up to 600kHz
- Adjustable Constant Frequency: 100kHz to 500kHz
- 100μA Shutdown Supply Current
- Capable of Driving Large Power MOSFETs
- Short-Circuit Protection and Soft-Start
- Radiation Performance
- Total Ionizing Dose (TID) Tolerance, per TM1019.8, MIL-STD-883:
- 200kRad (Si), per condition A at 50Rads(Si)/sec
- 100kRad (Si), per condition D at 10mRads(Si)/sec
- ELDRS Pass 100kRad(Si)
- Displacement Damage Defect (DDD) up to 1E12 Neutrons/cm2
- Single Event Transient (SET), Single Event Upset (SEU) and Single Event Latchup (SEL) tests up to a Linear Energy Transfer (LET) of 117.6 MeV.cm2/mg to case temperatures of 100°C
Radiation Performance
The RH3845 is a high voltage, synchronous, current mode controller used for medium to high power, high efficiency supplies. It offers a wide 7.5V to 60V input range. With an external VCC supply, the input can drop to 4V and continue to operate after startup. An onboard regulator simplifies the biasing requirements by providing IC power directly from VIN.
Additional features include adjustable fixed operating frequency synchronizable to an external clock for noise sensitive applications, gate drivers capable of driving large N-channel MOSFETs, a precision undervoltage lockout, low shutdown current, short-circuit protection and a programmable soft-start, and overtemperature protection.
Note that Burst Mode® operation, available in the LT3845, is not available in the RH3845 version.
RH3845MW-1 operates in pulse skip mode where reverse inductor current is disallowed. Regulation is achieved at light loads by skipping cycles. Operation in pulse skip mode yields higher light load efficiency, but higher output voltage ripple.
RH3845MW-2 operates in forced continuous mode where reverse inductor current is allowed. This mode of operation maintains a constant frequency over all loads making it suitable for noise sensitive applications. However, forced continuous mode is less efficient at light loads.
THIRD PARTY VENDOR AVAILABILITYWe partner with third party vendors who assemble and test packaged products with RH Dice inside.
| Part Number | Description |
| MSK5055RH | High Voltage Switching Controller (RH3845A IC only) |
| MSK5063RH | 10A ,60V DC-DC Buck Regulator Module (External Inductor) |
Applications
- Intermediate Bus Power Supplies
- Avionics and Control Systems
- Distributed Power Converters
Documentation
Data Sheet 3
Controlled Drawings 1
Radiation Report 4
Product Selector Card 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| RH3845MKDICE | DIE | ||
| RH3845MW-1 | 16-Lead Flatpak Glass Sealed (Hermetic) | ||
| RH3845MW-1-EMX | 16-Lead Flatpak Glass Sealed (Hermetic) | ||
| RH3845MW-2 | 16-Lead Flatpak Glass Sealed (Hermetic) | ||
| RH3845MW-2-EMX | 16-Lead Flatpak Glass Sealed (Hermetic) | ||
| RHK3845MKDICE | DIE |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 30, 2022 - 22_0196 Test Site Transfer of RH, SMD, Class-S, Special Flow, MIL-STD-883 Products from Analog Devices Milpitas to ADGT |
||
| RH3845MKDICE | PRODUCTION | |
| RH3845MW-1 | PRODUCTION | |
| RH3845MW-2 | PRODUCTION | |
|
Oct 5, 2020 - 20_0294 Golden Altos as an Alternate Assembly Plant for Radiation Hardened/ Military Products in TO39 and dies sales. |
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| RH3845MKDICE | PRODUCTION | |
|
Sep 17, 2020 - 20_0296 ADI Philippines as an Alternate Assembly Plant for Radiation Hardened Products in Cerpak and Die Sales. |
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| RH3845MKDICE | PRODUCTION | |
|
Jun 8, 2020 - 20_0150 RHK3845MK and RH3845MK DICE Datasheet Electrical Specification Change |
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| RH3845MKDICE | PRODUCTION | |
| RH3845MW-1 | PRODUCTION | |
| RH3845MW-2 | PRODUCTION | |
|
Oct 19, 2023 - 23_0194 RH3845MW-1 / RH3845MW-2 on 16L Cerpack Aluminum Bonding Wire Change |
||
| RH3845MW-1 | PRODUCTION | |
| RH3845MW-2 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
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