Features
- Qualified to Renesas Rad Hard QML-V Equivalent Screening and QCI Flow (R34TB0001EU)
- All screening and QCI are in accordance with MIL-PRF-38535 Class V
- Separate 2.7V to 5.5V bias rail and 0.75V to 5.5V LDO input rail
- 3A sourcing and sinking low-dropout regulator with 600μV dead band crossover
- Internal buffered reference amplifier provides VREF = VDDQ/2 for DDR applications
- Internal 0.5V voltage reference for standard LDO applications
- Low 142mV typical dropout at 3A sourcing in DDR4 configuration
- Individual OCP setting for source and sink from 300mA to 3A
- Optional LDO and buffer output discharge function
- Externally adjustable soft-start
- TID Rad Hard Assurance (RHA) testing
- LDR (< 10mrad(Si)/s): 75krad(Si)
- SEE Characterization
- No DSEE for VIN = 6.2V, VCC = 6.2V at 86MeV•cm2/mg
- VOUT and BUF-OUT SET < 2% at 86MeV•cm2/mg
- |VOUT - BUF-OUT| SET < 40mV at 86MeV•cm2/mg
- SEFI < 0.18μm2 at 86MeV•cm2/mg
Description
The ISL75055SLH is a radiation hardened 0.75V to 5.5V input, 3A sourcing and sinking low-dropout linear regulator designed for powering the VTT termination rail of DDR memory modules. A buffered reference amplifier provides an accurate VREF reference supply for the DDR. Individual adjustable overcurrent protection (OCP) for sourcing and sinking allows the current limit of the LDO to be configured down to 300mA.
The ISL75055SLH features external error amplifier inputs to set VDDQ/2 as the reference voltage in DDR applications. It also features an internal 0.5V reference for standard LDO applications.
Separate VCC bias and LDO VIN pins, combined with a very low dropout, allow minimal internal losses while maintaining highly accurate output regulation.
The ISL75055SLH is offered in an 18 Lead Ceramic Metal Seal Flatpack Package (CDFP) with two bottom heat slugs and operates across the full military temperature range of -55°C to +125°C.
Parameters
| Attributes | Value |
|---|---|
| Rating | Space |
| IOUT (A) | 3 |
| Supply Voltage (min) (V) | 0.75 - 0.75 |
| Supply Voltage (max) (V) | 5.5 - 5.5 |
| Input Voltage (Min) (V) | 2.7 |
| Input Voltage (Max) (V) | 5.5 |
| VDO @ IOUTMAX (Typ) (mV) | 142 |
| VOUT (min) (V) | 0.5 |
| VOUT (max) (V) | 4.1 |
| Temp. Range (°C) | -55 to +125°C |
| TID LDR (krad(Si)) | 75 |
| DSEE (MeV·cm2/mg) | 86 |
| Flow | RH Hermetic |
| Qualification Level | Class Ve, EM |
| Die Sale Availability? | Yes |
| PROTO Availability? | Yes |
Product Comparison
| ISL75055SLH | ISL73051ASEH | ISL75051ASEH | ISL75055M | |
| Supply Voltage (min) | 0.75 - 0.75 | 2.2 - 2.2 | 2.2 - 2.2 | .75 - .75 |
| Supply Voltage (max) | 5.5 - 5.5 | 6 - 6 | 6 - 6 | 5.5 - 5.5 |
| VOUT (min) (V) | 0.5 | 0.8 | 0.8 | 0.5 |
| VOUT (max) (V) | 4.1 | 5 | 5 | 4.1 |
| Pkg. Type | CFP, DIE | CFP, DIE | CFP, DIE | TQFP-EP |
| Lead Count (#) | 18 | 18 | 18 | 48 |
| IOUT (A) | ±3 | 3 | 3 | ±3 |
| Flow | RH Hermetic | RH Hermetic | RH Hermetic | RT Plastic |
Applications
- DDR, DDR2, DDR3, and DDR4 memory VTT termination rail and buffered VREF reference
- Low-noise supply rail for FPGA, DSP, and ASIC
- General-purpose LDO rails
- Two-quadrant supply for sourcing or sinking up to 3A of current
Renesas Boards & Kits
Radiation Hardened 3A Source and Sink DDR Terminator/LDO Evaluation Board
Support Communities
