Digital Multi-Phase Buck Controller
CHL8203/12/13/14
FEATURES
DESCRIPTION
Dual output 2/3/4+1-phase PWM Controller
(CHL8212/13/14) and single output 3-phase PWM
Controller (CHL8203)
The CHL8212/13/14 are dual-loop digital multi-phase
buck controllers and the CHL8203 is a single-loop digital
multiphase buck controller designed for GPU voltage
regulation. Dynamic voltage control is provided by
registers which are programmed through I2C and then
selected using a 3-bit parallel bus for fast access.
Easiest layout and fewest pins in the industry
Footprint compatible with CHL8225 (CHL8213/14)
for analog and power signals
Up to 3 VID select lines for dynamic voltage
transitions
The CHL8203/12/13/14 include IR Efficiency Shaping
Technology to deliver exceptional efficiency at minimum
cost across the entire load range. IR 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.
Slow OCP for Thermal Design Current (TDC)
protection
Programmable ICRITICAL signal
I2C interface for configuration & telemetry
Pin programmable I2C address (CHL8203/13/14)
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.
Overclocking support with I2C voltage override and
Vmax setting
Flexible I2C bus security features
I2C security enable pin (CHL8203/13/14)
Independent loop switching frequencies from 200kHz
to 1.2MHz per phase
The CHL8203/12/13/14 provides extensive OVP, UVP, OCP
and OTP fault protection and the CHL8203/13/14 includes
thermistor based temperature sensing with VRHOT signal.
IR Efficiency Shaping with Dynamic Phase Control
(DPC)
1-phase & Active Diode Emulation modes for light
load efficiency
The CHL8203/12/13/14 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.
IR Adaptive Transient Algorithm (ATA) on both loops
minimizes output bulk capacitors and system cost
Per-Loop Fault Protection: OVP, UVP, OCP
Thermal Protection (OTP) and VRHOT# flag
(CHL8203/13/14)
PIN DIAGRAM
Multiple time programmable (MTP) memory for
custom configuration
40
39
38
37
36
35
34
33
32
31
1
2
30
29
28
27
26
25
24
23
22
21
RCSP_L2
RCSM_L2
VCC
RCSP
RCSM
VPGM
VSEN
Compatible with IR ATL and 3.3V tri-state Drivers
3.3V +10%/-15% supply voltage; 0ºC to 85ºC
operation
3
4
VSEN_L2
VRTN_L2
PWM_L2
CHL8213/14
40 Pin 6x6 QFN
Top View
5
VRTN
Pb-Free, RoHS, QFN packages
6
RRES
TSEN
PWM41
NC2
/
7
8
PWM3
PWM2
PWM1
V18A
1 CHL8214
2 CHL8213
41 GND
VRRDY1
9
APPLICATIONS
10
VRRDY2
Multi-phase GPU Systems
11
12
13
14
15
16
17
18
19
20
GDDR Memory
Figure 1: CHL8213/14 Package Top View
1
October 13, 2011 | FINAL | V1.3