RH1959
PRODUCTIONRadiation Hardened 4.5A, 500kHz Step-Down Switching Regulator
- Part Models
- 3
- 1ku List Price
- Starting From $700.14
Overview
- MIL-PRF-38535 Class V Compatible Dice*
- Operates with Input as Low as 4V
- Output Voltages Down to 1.21V
- Constant 500kHz Switching Frequency
- Synchronizable to 1MHz
- Internal Slope Compensation
- Cycle-by-Cycle Current Limiting
- Integrated 4.5A Switch
- Current Mode Control
Radiation Performance*
- Total Ionizing Dose (TID) Tolerance, per TM1019.8, MIL-STD-883:
- 100kRad (Si), per condition A at 50Rads(Si)/sec
- 50kRad (Si), per condition D at 10mRads(Si)/sec
- ELDRS Pass 50kRad(Si)
- Displacement Damage Defect (DDD) up to 1E12 Neutrons/cm2
- Single Event Performance up to an LET of at least 80 MeVcm2/mg
* Radiation and Qualification completed on the packaging vendor’s assembled unit.
The RH1959 is a 500kHz monolithic buck mode switching regulator with a 4.5A integrated switch that will operate down to 1.21V. High switching frequency allows a considerable reduction in the size of external components. The topology is current mode for fast transient response and good loop stability.
A special high speed bipolar process and new design techniques achieve high efficiency at high switching frequency. Efficiency is maintained over a wide output current range by keeping quiescent supply current near 3.3mA and by utilizing a supply boost capacitor to saturate the power switch.
Full cycle-by-cycle short-circuit protection and thermal shutdown are provided. Standard surface mount external parts are used, including the inductor and capacitors. Optional shutdown and synchronization functions are available. Implementing shutdown reduces supply current to 30μA. Synchronization allows an external logic level signal to increase the internal oscillator from 580kHz to 1MHz.
Applications
- POL Regulator Applications
- Satellite System Power Supply
- Microprocessor, FPGA Power Source
- High Efficiency Low Voltage Subsystem Power Supply
Documentation
Data Sheet 2
Radiation Report 1
High Dose Rate Radiation Reports 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 |
|---|---|---|---|
| RH1959MILDICE | DIE | ||
| RH1959MW | 16-Lead FlatPack | ||
| RH1959MW-EMX | FLATPACK |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 30, 2020 - 20_0325 ADI Philippines as an assembly plant to replace ADI Hillview for Radiation Hardened products in TO5 packages and die sales. |
||
| RH1959MILDICE | PRODUCTION | |
|
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 |
||
| RH1959MW | PRODUCTION | |
| RH1959MW-EMX | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
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