6+1 Dual Output Digital Multi-Phase Controller
IR35203
FEATURES
Ultra Low Quiescent Power Dual output 6+1 phase
PWM Controller
Intel VR12 Rev 1.7, VR12.5 Rev 1.5, IMVP8 Rev
1.2, and Memory VR modes
®
DESCRIPTION
The IR35203 is a dual-loop digital multi-phase
buck controller designed for CPU voltage
®
regulation, and is fully compliant with Intel VR12
2
Rev 1.7, VR12.5 Rev 1.5, IMVP8 Rev 1.2
specifications.
The IR35203 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 phases based
upon load current. The IR35203 can be configured
to enter 1 or 2-phase PS1 operation and active
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.
IR35203 has 127 possible address values for both
the PMBus and I2C bus interfaces. The device
configuration can be easily defined using the IR
PowIRCenter GUI, and is stored in the on-chip
Non-Volatile Memory (NVM). This reduces external
components and minimizes the package size.
The IR35203 provides extensive OVP, UVP, OCP,
OTP & CAT_FLT fault protection, and includes
thermistor based temperature sensing or per
phase temperature reporting when using the IR
powIRstage. The controller is designed to work
with either Rdson current sense PowIRstages or
with DCR current sense.
The IR35203 also includes numerous VR design
simplifying and differentiating features, like register
diagnostics, which enable fast time-to-market.
Switching frequency from 194KHz to 2MHz per
phase in 56 steps
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 PID Coefficient auto-
scaling
Fault Protection: OVP, UVP, OCP, OTP, CAT_FLT
I2C/SMBus/PMBus system interface for reporting of
Temperature, Voltage, Current & Power telemetry for
both loops
Multiple Time Programming (MTP) with integrated
charge pump for easy non-volatile programming
Compatible with 3.3V tri-state drivers
+3.3V supply voltage; -40 C to 85 C ambient
o
o
operation; -40 C to 125 C junction
o
o
Pb-Free, RoHS, 6x6mm 48-pin, 0.4mm pitch QFN
APPLICATIONS
Intel® VR12, VR12.5 and IMVP8 (overclocking only)
based systems
Servers and High End Desktop CPU VRs
High Performance Graphics Processors, Memory VR
ORDERING INFORMATION
Base Part
Number
IR35203
IR35203
IR35203
Notes:
1.
2.
Package Type
Form
48-pin, QFN 6 mm x 6 mm
48-pin, QFN 6 mm x 6 mm
48-pin, QFN 6 mm x 6 mm
Tape and Reel
Tape and Reel
Tray
Standard Pack
Quantity
3000
3000
4900
Orderable
Part Number
IR35203MxxyyTRP
1
IR35203MTRPBF
IR35203MTYPBF
Customer Specific Configuration File, where xx = Customer ID and yy = Configuration File (Codes assigned by IR Marketing).
IR35203 is not intended for application where ultra low power PS4 shutdown functionality is required.
1
www.irf.com
| © 2016 International Rectifier
February 8, 2016 | V1.5
6+1 Dual Output Digital Multi-Phase Controller
IR35203
ORDERING INFORMATION
IR35203M
P/PBF
– Lead Free
TR
– Tape & Reel /
TY
- Tray
yy
– Configuration File ID
xx
– Customer ID
Package Type (QFN)
48
ISEN6
RCSP
RCSM
VRDY2
VSEN
VRTN
I_IN
TSEN1
CFILT
VRDY1
EN_L2/
CAT_FLT
VINSEN
1
2
3
4
5
6
7
8
9
10
11
47
46
45
44
43
42
41
40
39
38
37
36
ISEN1_L2
35
RCSP_L2
34
RCSM_L2
33
VCC
VSEN_L2
VRTN_L2
IR35203 6+1
48 Pin 6x6 QFN
Top View
32
31
30
PWM1_L2
29
28
27
26
PWM6
PWM5
PWM4
PWM3
PWM2
49
GND
12
25
13
14
15
16
17
18
19
20
21
22
23
24
Figure 1: IR35203 Pin Diagram
2
www.irf.com
| © 2016 International Rectifier
February 8, 2016 | V1.5
