Digital Multi-Phase Buck Controller
CHL8316
FEATURES
Intel VR11.x compliant Digital PWM Controller
Programmable 1-phase to 6-phase operation
Customized Digital Over-Clocking features an
easy-to-use SMBus Gamer command and a Gamer
VID control up to 2.3V, Gamer Vmax, VID Override
or Track, Digital Load-Line Adjust, Gamer OC/OVP,
Gamer OFF pin and Gamer OTP
IR Efficiency Shaping features a Variable Gate Drive
and Dynamic Phase Control
1-phase to 2-phase PSI for Light Loads
Adaptive Transient Algorithm minimizes capacitors
Enables Thermal Phase Balancing
SMBus Fault Indicators: OVP, UVP, OCP, OTP
SMBus interface for configuring and monitoring;
SMBus commands include monitoring input
current and power
Compatible with IR ATL Drivers and tri-state Drivers
9 bytes of NVM storage available for customer use
+3.3V supply voltage; 0ºC to 85ºC Ambient
operation
RoHS Compliant, MSL level 1 package
DESCRIPTION
The CHL8316 is a 6-phase digital synchronous buck
controller for core regulation of high-performance Intel®
VR11.1 and VR11.0 platforms. The CHL8316 is fully
compliant with VR11.1 including Power Status Indicator
(PSI) and for improved light load efficiency and accurate
current output (IMON).
The CHL8316 includes a customized set of digital over-
clocking features which require no external components.
Gaming applications can use the SMBus interface to place
the VRD into “Gamer Mode” to extend VID up to 2.3V with
6.25 mV resolution.
The CHL8316 deploys a number of efficiency shaping
features such as variable MOSFET gate drive versus load,
programmable PSI modes for optimum light-load along
with programmable phase shedding to autonomously
add/drop phases versus load.
CHL8316 supports NTC temperature sense to report
temperature and trigger VR HOT and OTP faults. Digital
thermal balancing allows proportional current imbalance
between phases.
The CHL8316 provides extensive OVP, UVP, OCP, and
OTP fault protection. Device and fault configuration
parameters are easily defined using the IR Power Designer
GUI and stored in on-chip non-volatile memory (NVM).
The 3-pin SMBus interface can be used to monitor a variety
of operating parameters on up to seven CHL8316 based
VRs. The controller includes a unique sensorless and
lossless input current monitoring capability.
APPLICATIONS
Intel® VR11.x CPU VRD and VRM; DDR Memory
High Performance Desktops, Servers and
Graphics Cards
Over-clocking and High-Efficiency Application
BASIC APPLICATION
CHL8316
PIN DIAGRAM
ISEN1
ISEN2
IRTN3
ISEN3
ISEN4
ISEN5
48 47 46 45 44 43 42 41 40 39 38 37
RCSP
RCSM
VCC
VCPU
VRTN
SADDR/
GAMER_OFF
IMON
RRES
VINSEN
TSEN
EN
V18A
1
2
3
4
5
6
7
8
9
10
11
12
13 14
15 16 17 18 19 20 21 22 23 24
SALERT#
SDA
PSI#
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
SCL
ISEN6
IRTN1
IRTN2
IRTN4
IRTN5
IRTN6
36
35
34
33
CHL8316
48 Pin
7mmx 7mm
QFN
TOP VIEW
GND
32
31
30
29
28
VCC
PWM6
PWM5
PWM4
PWM3
PWM2
PWM1
NC
VCC
VAR_GATE
VR_HOT
VR_READY
27
26
25
Figure 1: CHL8316 Basic Application Circuit
1
October 12, 2011 | FINAL | V1.02
Figure 2: CHL8316 Package Top View
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