IR3536 datasheet(1/3 Pages) IRF

No de pièce	IR3536

Description	Digital Multi-Phase Buck Controller 6-phase 8-phase dual output PWM Controller

PDF	3 Pages

Scroll/Zoom	100%

Fabricant	IRF [International Rectifier]

Site Internet	http://www.irf.com

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1 / 3 page

June 21, 2013 | FINAL | V1.09

1

Digital Multi-Phase Buck Controller

IR3536/38

CHL8326/28

FEATURES

 6-phase & 8-phase dual output PWM Controller

 Phases are flexibly assigned between Loops 1 & 2

 Intel® VR12, AMD® 3.4MHz SVI/PVI & Memory

modes

 Overclocking & Gaming Mode with Vmax setting

 Switching frequency from 200kHz to 1.2MHz per

phase

 IR Efficiency Shaping Features including Variable

Gate Drive and Dynamic Phase Control

 Programmable 1-phase or 2-phase 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

 Non-Volatile Memory (NVM) for custom

configuration

 Compatible with IR ATL and 3.3V Tri-state Drivers

 +3.3V supply voltage; -20ºC to 85ºC ambient

operation

 Pb-Free, RoHS, 7x7 48-pin & 8x8 56-pin QFN, MSL2

package

APPLICATIONS

 Intel ® VR12 & AMD® SVI & PVI based systems

 DDR Memory with Vtt tracking

 Overclocked & Gaming platforms

PIN DIAGRAM

49 GND

CHL8326

48 Pin 7x7 QFN

Top View

1

2

7

8

5

6

3

4

10

9

12

11

36

35

30

29

32

31

34

33

27

28

25

26

47

43

45

40

46

42

44

39

41

48

38

37

14

18

16

21

15

19

17

22

20

13

23

24

PWM5

VRTN

RCSM

PWM6

VSEN

PWM4

VR_READY

1 /

PWRGD

2

RCSP

TSEN

PWM3

VINSEN

V18A

RRES

VCC

PWM2

PWM1

RCSM_L2

RCSP_L2

CFP

1 /

VFIXEN_PSI

2

VR_READY_L2

1

/ PWROK

2

VCC

VAR_GATE

VRTN_L2

VSEN_L2

Figure 1: IR3536/CHL8326 Package Top View

DESCRIPTION

The IR3536/CHL8326 and IR3538/CHL8328 are dual-loop

digital multi-phase buck controllers. The IR3536/CHL8326

drive up to 6 phases and the IR3538/CHL8328 drives up to

8 phases. The IR3536/CHL8326 and IR3538/CHL8328 are

fully Intel® VR12 and AMD® SVI/PVI compliant on both

loops and provide a Vtt tracking function for DDR memory.

The IR3536/CHL8326 and IR3538/CHL8328 include the

IR 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 Dynamic Phase

Control adds/drops phases based upon load current.

The IR3536/CHL8326 and IR3538/CHL8328 can be

configured to enter 1-phase 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.

The I2C/PMBus interface can communicate with up to 16

IR3536/CHL8326 and IR3538/CHL8328 based VR loops.

Device configuration and fault parameters are easily

defined using the IR Intuitive Power Designer (DPDC) GUI

and stored in on-chip NVM.

The IR3536/CHL8326 and IR3538/CHL8328 provides

extensive OVP, UVP, OCP and OTP fault protection and

includes thermistor based temperature sensing with

VR_HOT signal.

NVM storage saves pins and enables a small package size.

The IR3536/CHL8326 and IR3538/CHL8328 also include

numerous features like register diagnostics for fast design

cycles and platform differentiation, truly simplifying

VRD design and enabling fastest time-to-market with its

“set-and-forget” methodology.

PWM5

VRTN

RCSM

PWM6

VSEN

PWM4

VR_READY

1 /

PWRGD

2

RCSP

TSEN

PWM3

VINSEN

V18A

RRES

VCC

PWM2

PWM1

RCSM_L2

RCSP_L2

CFP

1 /

VFIXEN_PSI

2

VR_READY_L2

1

/ PWROK

2

VCC

PWM7

VRTN_L2

VSEN_L2

57 GND

CHL8328

56 Pin 8x8 QFN

Top View

55

51

53

48

54

50

52

47

49

56

46

45

43

44

1

2

7

8

5

6

3

4

10

9

12

11

14

13

16

20

18

23

17

21

19

24

22

15

25

26

28

27

42

41

36

35

38

37

40

39

33

34

31

32

29

30

ISEN8

GPO_B

PWM8

ISEN7

1Intel/MPoL mode

2AMD mode

Figure 2: IR3538/CHL8328 Package Top View

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