1 Description
• High frequency, low profile DC-DC converters;
• Voltage Regulators for CPUs, GPUs and DDR memory arrays;
• Telecom controlled and uncontrolled
The TDA21590 integrated power-stage contains a low quiescent current synchronous buck gate-driver IC which is
co-packed with control and synchronous MOSFETs along with an active diode structure that achieves low Vsd
similar to a schottky with very little reverse recovery charge. The package is optimized for PCB layout, heat
transfer, driver/MOSFET control timing, and minimal switch node ringing when layout guidelines are followed.
The paired gate driver and MOSFET combination enables higher efficiency at lower output voltages required by
cutting edge CPU, GPU and DDR memory designs.
The internal MOSFET sensing achieves superior current sense accuracy vs. best-in-class controller-based Inductor
DCR sense methods.
Protection includes IC temperature reporting and over temperature protection feature (OTP with thermal
shutdown), cycle-by-cycle over current protection (OCP), control MOSFET short detection (HSS - High side short
detection), VDRV and bootstrap under-voltage protection. The TDA21590 also features "refreshing" of bootstrap
capacitor to prevent the bootstrap capacitor from over-discharging.
Operation of up to 1.5 MHz switching frequency enables high performance transient response, allowing
miniaturization of output inductors, as well as input and output capacitors while maintaining industry leading
efficiency.
Features
• Integrated driver, active diode, control MOSFET Q1 and synchronous MOSFET Q2
• On-chip MOSFET Current sensing and reporting at 5 μA/A.
• Input voltage (VIN) range of 4.25 V to 16 V
• VCC and VDRV supply of 4.25 V to 5.5 V
• Output voltage range from 0.225 V up to 5.5 V at VIN = 12 V
• Output current capability of 90 A
• Operation up to 1.5 MHz
• Enhanced Fault reporting and identification
• VDRV under voltage lockout (UVLO)
• Bootstrap under-voltage protection
• 8mV / °C temperature analog output
• Over temperature protection and thermal shutdown
• Cycle-by-cycle over current Protection (OCP) and flag
• Control MOSFET short (HSS) detection and flag
• Auto-replenishment on bootstrap capacitor
• Compatible with 3.3 V tri-state PWM Input
• Body-Braking™ load transient support
• DEEP SLEEP mode for power saving via EN= low (32 μA typ)
• Small 5 mm x 6 mm x 0.9 mm PQFN package
• Lead free RoHS compliant package