ISL99227 Datasheet, PDF (1/17 Pages) Intersil Corporation – ISL99227 with 3.3V compatible tri-state PWM input

DATASHEET
Smart Power Stage (SPS) Module with Integrated High
Accuracy Current and Temperature Monitors
ISL99227, ISL99227B
The ISL99227, ISL99227B are Smart Power Stages (SPS)
compatible with Intersil’s ISL68xxx/69xxx Digital Multiphase
(DMP) controllers and phase doubler (ISL6617A), respectively.
The ISL99227, ISL99227B have integrated high accuracy
current and temperature monitors that can be fed back to the
controller and doubler to complete a multiphase DC/DC
system. They simplify design and increase performance by
eliminating the DCR sensing network and associated thermal
compensation. Light-load efficiency is supported via a
dedicated LFET control pin. An industry leading thermally
enhanced 5x5 PQFN package allows minimal overall PCB real
estate.
The ISL99227, ISL99227B feature a 3.3V compatible, 5.0V
compatible tri-state PWM input that, working together with
Intersil’s multiphase PWM controllers, will provide a robust
solution in the event of abnormal operating conditions. The
ISL99227, ISL99227B also improve system performance and
reliability with integrated fault protection of UVLO,
over-temperature and overcurrent. An open-drain fault
reporting pin simplifies the handshake between SPS and
Intersil controllers and can be used to disable the controller
during start-up and fault conditions.
Related Literature
• TB363 “Guidelines for Handling and Processing Moisture
Sensitive Surface Mount Devices (SMDs)”
Features
• Input range: +4.5V to +18V
• Supports 60A DC current
• ISL99227 with 3.3V compatible tri-state PWM input
• ISL99227B with 5.0V compatible tri-state PWM input
• Downslope current sensing
• ±3% accuracy current monitor (IMON) with REFIN input
• 8mV/°C temperature monitor with OT flag
• Dedicated low-side FET control input
• Comprehensive fault protection for high system reliability
- High-side FET short and overcurrent protection
- Over-temperature protection
- V_CC and V_IN Undervoltage Lockout (UVLO)
• Open-drain fault reporting output
• Up to 2MHz switching frequency
• Pb-free (RoHS compliant), 32 Ld 5x5 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
+5V
PWM
CS#n
ISL68xxx/
ISL69xxx
CSRTN#n
CONTROLLER TEMP
EN
GND
VCC PVCC
BOOT
PHASE
LGCTRL
PWM
IMON
REFIN
TMON
FAULT#
SHOOT-
THROUGH
PROTECTION
SMART
CONTROL
PVCC
ISL99227
GND
+12V
VIN
SW
GND
L_OUT
C_OUT
FIGURE 1. ISL99227 SIMPLIFIED APPLICATION BLOCK DIAGRAM
V_OUT
October 27, 2016
1
FN8684.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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