Short-Form Datasheet
To request the full datasheet, visit the RAA221320 product page.
RAA221320
20A Smart Power Stage (SPS) with Integrated High Accuracy Current and Temperature Monitors
The RAA221320 is a Smart Power Stage (SPS)
compatible with the ISL68xxx/69xxx Digital
Multiphase (DMP) controllers. The SPS has
Features
• Input range: +3.0V to +16V
• Supports 20A DC current
integrated high-accuracy current and temperature
monitors that are fed back to the controller to
complete a multiphase DC/DC system. These
monitors simplify design and increase performance by
eliminating the DCR sensing network and associated
thermal compensation. An industry-leading thermally
enhanced 4x5 PQFN package allows minimal overall
PCB real estate.
• 3.3V compatible tri-state PWM input
• Downslope current sensing
• ±3% accuracy current monitor (IMON) with REFIN
input
• 8mV/°C temperature monitor with OT flag
• Comprehensive fault protection for high system
reliability
The SPS features a 3.3V compatible tri-state PWM
input that works together with the Renesas
○ Shorted HFET and overcurrent protection
○ Over-temperature protection
multiphase PWM controllers to provide a robust
solution in abnormal operating conditions. The SPS
also improves system performance and reliability with
integrated fault protection of UVLO, shorted HFET,
over-temperature, and overcurrent. An open-drain
fault reporting pin simplifies the handshake between
the SPS and controllers and can disable the controller
during startup and fault conditions.
○ V Undervoltage Lockout (UVLO)
CC
• Fault reporting outputs (TMON, Fault#, and IMON)
• Up to 1.5MHz switching frequency
• Pb-free (RoHS compliant), 25 Ld 4x5 PQFN
Applications
• High frequency and high efficiency VRM and VRD
• Core, graphic, and memory regulators for
microprocessors
• High density VR for server, networking, and cloud
computing
• POL DC/DC converters and video gaming consoles
+12V
+5V
BOOT
PHASE
VCC
VIN
ISL68xxx/
ISL69xxx
Controller
Shoot-
Through
Protection
PWM
IMON
PWM
CS#n
L
OUT
V
OUT
SW
PVCC
REFIN
TMON
CSRTN#n
Smart
Control
TEMP
EN
C
OUT
FAULT#
GND
GND
GND
RAA221320
Figure 1. RAA221320 Simplified Application Block Diagram
R16DO0002EU0101 Rev.1.1
Apr.2.21
Page 1 of 2
© 2020 Renesas Electronics