IR3566A Datasheet, PDF (1/4 Pages) International Rectifier – Dual Output Digital Multi-Phase Controller

Dual Output Digital Multi-Phase Controller _IR3566A
FEATURES
 Dual output 6+1 phase PWM Controller
 Fully supports AMD® SVI1 & SVI2 with dual OCP
and Intel® VR12 & VR12.5
 PVI and SVI GPU VR modes
 Overclocking & Gaming Mode
 Switching frequency from 200kHz to 2MHz
per phase
 IR Efficiency Shaping Features including
Dynamic Phase Control and Automatic Power
State Switching
 Programmable 1-phase or 2-phase operation for
Light Loads and Active Diode Emulation for Very
Light Loads
 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 telemetry
of 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, RoHS, 6x6mm, 48-pin, 0.4mm pitch QFN
DESCRIPTION
The IR3566A is a dual-loop digital multi-phase buck controller
designed for CPU voltage regulation and is fully compliant with
AMD® SVI1 & SVI2 and Intel^© VR12 & VR12.5 specifications.
The IR3566A includes IR’s Efficiency Shaping Technology
to deliver exceptional efficiency at minimum cost across the
entire load range. IR Variable Gate Drive optimizes the
MOSFET gate drive voltage based on real-time load current.
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 IR3566A provides extensive OVP, UVP, OCP and OTP fault
protection and includes thermistor based temperature sensing
with VRHOT signal.
The IR3566A 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
 Servers and High End Desktop CPU VRs
 High Performance Graphics Processors
BASIC APPLICATION
VR_RDY_L1
VR_RDY_L2
VR_HOT#
ENABLE
SV_CLK
SV_DIO
SV_ALERT
3.3V
IR3566A
VR_RDY_L1 PWM1
VR_RDY_L2 ISEN1
VR_HOT# ^IRTN1
ENABLE
SV_CLK
PWM2
ISEN2
IRTN2
SV_DIO
SV_ALERT ^PWM6
ISEN6
IRTN6
VCC
PWM1_L2
ISEN1_L2
IRTN1_L2
Power
Stage 1
Power
Stage 2
...
Power
Stage 6
Power
Stage 7
12V
VOUT1
VOUT2
Figure 1: IR3566A Basic Application Circuit
PIN DIAGRAM
48 47 46 45 44 43 42 41 40 39 38 37
ISEN6 1
36 ISEN1_L2
RCSP 2
35 RCSP_L2
RCSM 3
34 RCSM_L2
VRDY2 4
33 VCC
VSEN 5
VRTN 6
RRES 7
TSEN1 8
V18A 9
VRDY1 10
EN_L2/INMODE/PWROK 11
VINSEN 12
IR3566A
48 Pin 6 x 6 QFN
Top View
49 GND
32 VSEN_L2
31 VRTN_L2
30 PWM1_L2
29 PWM6
28 PWM5
27 PWM4
26 PWM3
25 PWM2
13 14 15 16 17 18 19 20 21 22 23 24
Figure 2: IR3566A Package Top View
1 August 9, 2012 | FINAL | Product Brief | V2.04