Dual Output Digital Multi-Phase Controller
IR3564A
IR3570A
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
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; -40°C to 85°C ambient
operation
Pb-Free, RoHS, 5x5mm, 40-pin, 0.4mm pitch QFN
DESCRIPTION
The IR3564A/70A 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 IR3564A/70A 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 IR3564A/70A provides extensive OVP, UVP, OCP and OTP
fault protection and includes thermistor based temperature
sensing with VRHOT signal.
The IR3564A/70A 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
BASIC APPLICATION
IR3570A
VR_RDY_L1
VR_RDY_L2
VR_HOT#
ENABLE
SVC
SVD
SVT/ALERT#
3.3V
PIN DIAGRAM
IRTN4
2
/IRTN2_L2
1
12V
ISEN1
ISEN2
IRTN1
IRTN2
IRTN3
ISEN3
IRTN1_L2
32
VR_RDY_L1 PWM1
VR_RDY_L2 ISEN1
IRTN1
VR_HOT#
ENABLE
SVC
SVD
PWM3
ISEN3
IRTN3
.
.
.
Power
Stage 3
40
39
38
37
36
35
34
33
31
30
29
28
27
26
25
24
23
VOUT1
RCSP
RCSM
VRDY2
VSEN
VRTN
ISEN1_L2
Power
Stage 1
1
2
3
4
5
6
7
8
9
10
ISEN4
2
/ISEN2_L2
1
RCSP_L2
RCSM_L2
VCC
VSEN_L2
VRTN_L2
PWM1_L2
PWM4
2
/PWM2_L2
1
PWM3
PWM2
PWM1
PWM1_L2
SVT/ALERT#
ISEN1_L2
IRTN1_L2
VCC
PWM2_L2
ISEN2_L2
IRTN2_L2
Power
Stage 4
RRES
TSEN1
V18A
PWRGD/
VRDY1
PWROK/EN_L2/
INMODE
IR3570A/IR3564A
40 Pin 5x5 QFN
Top View
SM_DIO
VRHOT_ICRIT#
Figure 1: IR3564A/70A Basic Application Circuit
1
August 9, 2012 | FINAL | Produc t Brief | V2.04
Figure 2: IR3564A/70A Package Top View
ADDR_PROT
SVT/
SV_ALERT
VDDIO/
SV_ADDR
SV_CLK/
VIDSEL1
SV_DIO/
VIDSEL0
SM_CLK
Power
Stage 5
VOUT2
1 = IR3570A
2 = IR3564A
22
41 GND
21
14
15
16
17
18
19
20
11
12
13
VINSEN
EN
Microcontroller MCU
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