IR3565A Datasheet, PDF (1/4 Pages) International Rectifier – Dual Output Digital Multi-Phase Controller

Dual Output Digital Multi-Phase Controller _IR3565A
FEATURES
 Dual output 4+2 phase PWM Controller
 Easiest layout and fewest pins in the industry
 Fully supports AMD® SVI1 & SVI2 with dual OCP
and Intel® VR12 & VR12.5
 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, CFP
 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; -20°C to 85°C ambient
operation
 Pb-Free, RoHS, 6x6mm, 48-pin, 0.4mm pitch QFN
DESCRIPTION
The IR3565A 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 IR3565A 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 IR3565A provides extensive OVP, UVP, OCP and OTP fault
protection and includes thermistor based temperature sensing
with VRHOT signal.
The IR3565A 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
 High Performance Graphics Processors
BASIC APPLICATION
VR_RDY_L1
VR_RDY_L2
VR_HOT#
ENABLE
SVC
SVD
SVT/ALERT#
3.3V
IR3565A
VR_RDY_L1 PWM1
VR_RDY_L2 ISEN1
VR_HOT# ^IRTN1
ENABLE
SVC
PWM4
ISEN4
IRTN4
SVD
PWM1_L2
SVT/ALERT#
ISEN1_L2
IRTN1_L2
VCC
PWM2_L2
ISEN2_L2
IRTN2_L2
Power
Stage 1
...
Power
Stage 4
Power
Stage 5
Power
Stage 6
12V
VOUT1
VOUT2
Figure 1: IR3565A Basic Application Circuit
PIN DIAGRAM
48 47 46 45 44 43 42 41 40 39 38 37
RCSP 1
36 RCSP_L2
RCSM 2
35 RCSM_L2
VRDY2 3
34 VCC
CFP 4
33 VSEN_L2
VSEN 5
VRTN 6
RRES 7
TSEN1 8
IR3565A
48 Pin 6x6 QFN
Top View
32 VRTN_L2
31 PWM1_L2
30 PWM2_L2
29 PWM4
V18A 9
PWRGD/
VRDY1 ¹⁰
PWROK/EN_L2/
INMODE
11
VINSEN 12
13 14 15 16
28 PWM3
27 PWM2
49 GND
26 PWM1
25
VGD/TSEN2/
VAUXSEN
17 18 19 20 21 22 23 24
Figure 2: IR3565A Package Top View
1 August 9, 2012 | FINAL | Product Brief | V2.04