DIGITAL POL BUCK CONTROLLER with I2C AND PMBus
Interface
FEATURES
IR36021
DESCRIPTION
Dual output (2+1) Digital Controller with proprietary
control algorithm
Two‐phase operation available on Output #1 for
powering very high current ASICs and DSPs
I2C /PMBus interface for configuration & telemetry
with pin programmable address
Operating ambient temperature: ‐400C to 850C
3.3V bias operation
Independent loop switching frequencies from 200kHz
to 2MHz per phase
IR Efficiency Shaping with Dynamic Phase Control
(DPC)
Active Diode Emulation modes for light load efficiency
IR Adaptive Transient Algorithm (ATA) minimizes
output bulk capacitors and system cost
Independent OVP, UVP, OCP for each output
Thermal Protection (OTP) and VRHOT# flag
Multiple time programmable (MTP) memory for
custom configuration
Flexible I2C bus security features
Pb‐Free, RoHS, 32‐pin 5mm X 5mm QFN package
The IR36021 is a dual‐loop digital multi‐phase buck
controller designed for point of load applications.
The IR36021 include Efficiency Shaping Technology to
deliver exceptional efficiency at minimum cost across the
entire load range. 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 Intuitive Power Designer (IPD) GUI and
stored in on‐chip MTP.
The IR36021 provides extensive OVP, UVP, OCP and OTP
fault protection and includes thermistor based temperature
sensing with VRHOT signal.
The IR36021 includes numerous features like register
diagnostics for fast design cycles and platform
differentiation, truly simplifying VRD design and enabling
fastest time‐to‐market (TTM) with “set‐and‐forget”
methodology.
APPLICATIONS
BASIC APPLICATION
Embedded Telecom Systems
Netcom Applications
Server Application
Distributed Point of Load Power Architectures
PIN DIAGRAM
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February 27, 2013 | Rev 3.5
ISEN2
SM_CLK
ISEN1b
IRTN2
SM_DIO
IRTN1b
SM_ALERT
ISEN1a
IRTN1a
ADDR_PROT
RCSP1
VRHOT_ICRIT
EN1
RCSM1
NC
Figure 1: IR36021 Basic Application Circuit
VINSEN
Figure 2: IR36021 Package Top View
DIGITAL POL BUCK CONTROLLER with I2C AND PMBus
Interface
PIN DIAGRAM
32
31
30
29
28
27
26
25
PGood2
1
24
RCSP2
VSEN1
2
23
RCSM2
VRTN1
3
22
VCC
RRES
4
21
VSEN2
TSEN
5
20
VRTN2
V18A
6
19
PWM2
PGood1
7
18
PWM1b
EN2
8
17
PWM1a
32 Pin 5x5 QFN
Top View
33 GND
9
10
11
12
13
14
15
16
Figure 3: IR36021 Package Bottom View
5mm X 5mm QFN
ORDERING INFORMATION
Package
Tape and Reel Qty
Part Number
M
3000
IR36021MTRPbF
2
February 27, 2013 | Rev 3.5
IR36021
DIGITAL POL BUCK CONTROLLER with I2C AND PMBus
Interface
IR36021
QFN Package; 5x5-32 Lead
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7903
This product has been designed and qualified for the consumer market.
Visit us at www.irf.com for sales contact information
Data and specifications subject to change without notice. 02/2013
3
February 27, 2013 | Rev 3.5
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