Dual Output Digital Multi-Phase Controller
IR3564B
IR3570B
www.irf.com | © 2015 International Rectifier February 24, 2015 | V1.1
1
FEATURES
Dual output 4+1 and 3+2 phase PWM
Controllers
Easiest layout and fewest pins in the industry
Fully supports AMD® SVI1 & SVI2 with dual
OCP and Intel® VR12 & VR12.5
Complies with VR12.5 Rev 1.3 requirement
for SVID register 15h to have <200 µSec
filter
Overclocking & Gaming Mode
Switching frequency from 200kHz to 2MHz
per phase
IR Efficiency Shaping Features including
Dynamic Phase Control and Automatic Power
State Switching
IR Adaptive Transient Algorithm (ATA) on
both loops minimizes output bulk capacitors
and system cost
Auto-Phase Detection with auto-
compensation
Per-Loop Fault Protection: OVP, UVP, OCP,
OTP
I2C/SMBus/PMBus system interface for
telemetryof Temperature, Voltage, Current &
Power for both loops
Multiple Time Programming (MTP) with
integrated charge pump for easy custom
configuration
Compatible with IR ATL and 3.3V tri-state
Drivers
+3.3V supply voltage; -40°C to 85°C ambient
operation
Pb-Free, Halogen Free, RoHS, 5x5mm,
40-pin, 0.4mm pitch QFN
DESCRIPTION
The IR3564B/70B is a dual loop digital multi-phase buck
controller designed for CPU voltage regulation and is fully
compliant with AMD® SVI1 & SVI2 Rev 1.06 and Intel®
VR12 Rev 1.5 PWM specification and VR12.5 Rev 1.3
PWM specification.
The IR3564B/70B includes IR’s Efficiency Shaping
Technology to deliver exceptional efficiency at minimum
cost across the entire load range. IR’s Dynamic Phase
Control adds/drops active phases based upon load
current and can be configured to enter 1-phase operation
and diode emulation mode automatically or by command.
IR’s unique Adaptive Transient Algorithm (ATA), based
on proprietary non-linear digital PWM algorithms,
minimizes output bulk capacitors and Multiple Time
Programmable (MTP) storage saves pins and enables a
small package size. Device configuration and fault
parameters are easily defined using the IR Digital Power
Design Center (DPDC) GUI and stored in on-chip MTP.
The IR3564B/70B provides extensive OVP, UVP, OCP
and OTP fault protection and includes thermistor based
temperature sensing with VRHOT signal.
The IR3564B/70B includes numerous features like
register diagnostics for fast design cycles and platform
differentiation, simplifying VRD design and enabling
fastest time-to-market (TTM) with “set-and-forget”
methodology.
APPLICATIONS
AMD® SVI1 & SVI2, Intel® VR12 & VR12.5 based
systems
Desktop & Notebook CPU VRs
GPU & Memory VRs
ORDERING INFORMATION
Base Part
Number
Package Type
Standard Pack
Orderable
Part Number
Form Quantity
IR3564B
IR3570B
QFN 5 mm x 5 mm Tape and Reel 3000
IR3564BMxxyyTRP
1
R3570BMxxyyTRP
1
IR3564B
IR3570B
QFN 5 mm x 5 mm Tape and Reel 3000
IR3564BMTRPBF
IR3570BMTRPBF
IR3564B
IR3570B
QFN 5 mm x 5 mm Tray 4900
IR3564BMTYPBF
IR3570BMTYPBF
1. Customer Specific Configuration File, where xx = Customer ID and yy = Configuration File (Codes assigned by IR Marketing).
