XR78021
20A Integrated Power Stage "DrMOS" with Current and Temperature Monitoring
Data Sheets
OBS
(Obsolete)
Overview
| Information | 20A Integrated Power Stage "DrMOS" with Current and Temperature Monitoring |
|---|---|
| # of Outputs | 1 |
| IOUT/Ch (A) | 20 |
| VIN MIN (V) | 4.5 |
| VIN MAX (V) | 17 |
| VOUT MAX (V) | 3.3 |
| Switching Frequency (kHz) | 1500 |
| Efficiency (%) | 84 |
| X-Y Dimension (mm) | 4x5 |
| Package | QFN |
| Features | UVLO, TMON, IMON |
| Junction Temp Range (°C) | -40 to 125 |
The XR78021 is an integrated power stage containing a synchronous buck gate driver
which is packaged with both half bridge MOSFETs designed to provide output
currents up to 20Amps. Also known as “DrMOS” (Driver plus MOSFETs), the package
design provides very low thermal impedance and excellent EMI performance by
minimizing parasitic inductances. The ratio of the MOSFET RDS(ON) is optimized for conversions from 12V rails to the low output
voltages required for the latest processor and chipsets of computing systems.
Computing
systems are demanding more and more telemetry of the power system. The XR78021
monitors internal temperature (TOUT pin) and uses that temperature information
to provide a temperature corrected current output (IOUT pin) derived from the
inductor DCR. The output current information has minimal phase delay and is
suitable for use with current mode PWM and valley current mode constant on-time
control.
TOUT serves the secondary function of a fault
flag for VCC UVLO
and Over-Temp fault. The XR78021 is offered in a 4x5x0.9mm QFN package.
- 20A Integrated Power Stage
- Input Voltage Range: 4.5V to 17V
- Output Voltage Range: 0.6V to 3.3V
- 0.6V to 5.5V without current sense
- IMON output 5mV/A (DCR=0.29mohm) with temperature compensation
- Suitable for current mode control loops
- TOUT output 8mV/°C with fault flags for VCC UVLO and temperature
- Designed for 3.3V tristate PWM outputs
- Boost pin refresh
- 4x5x0.9mm Lead free RoHS compliant package
- Servers
- Networking Equipment
- Industrial PC
Documentation & Design Tools
| Type | Title | Version | Date | File Size |
|---|---|---|---|---|
| Data Sheets | XR78021 20A Integrated Power Stage “DrMOS” with Current and Temperature Monitoring | July 2019 | 1.5 MB | |
| Product Briefs | XR78021 Product Brief | October 2017 | 209.8 KB |
Quality & RoHS
Parts & Purchasing
| Part Number | Pkg Code | Min Temp | Max Temp | Status | Suggested Replacement | PDN |
|---|---|---|---|---|---|---|
| XR78021ELTR-F | QFN27 5x4 | -40 | 125 | OBS |
Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Packaging
| Pkg Code | Details | Quantities | Dimensions |
|---|---|---|---|
| QFN27 5x4 |
|
|
|
Notifications
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