TPS51640A Datasheet, PDF (1/54 Pages) Texas Instruments – Dual-Channel (3-Phase CPU/1-Phase GPU) SVID, D-CAP+™ Step-Down Controller for

TPS51640A, TPS59640, TPS59641
www.ti.com
SLUSAQ2 – JANUARY 2012
Dual-Channel (3-Phase CPU/1-Phase GPU) SVID, D-CAP+™ Step-Down Controller for
IMVP-7 V_CORE with Two Integrated Drivers
FEATURES
1
•2 Intel IMVP-7 Serial VID (SVID) Compliant
• Supports CPU and GPU Outputs
• CPU Channel 1, 2, or 3 Phase
• Single-Phase GPU Channel
• Full IMVP-7 Mobile Feature Set Including
Digital Current Monitor
• 8-Bit DAC with 0.250-V to 1.52-V Output Range
• Optimized Efficiency at Light and Heavy Loads
• V_CORE Overshoot Reduction (OSR)
• V_CORE Undershoot Reduction (USR)
• Accurate, Adjustable Voltage Positioning
• 8 Independent Frequency Selections per
Channel (CPU/GPU)
• Patent Pending AutoBalance™ Phase
Balancing
• Selectable 8-Level Current Limit
• 3-V to 28-V Conversion Voltage Range
• Two Integrated Fast FET Drivers w/Integrated
Boost FET
• Internal Driver Bypass Mode for Use with
DrMOS Devices
• Small 6 × 6 , 48-Pin, QFN, PowerPAD™
Package
DESCRIPTION
The TPS51640A, TPS59640 and TPS59641 are
dual-channel, fully SVID compliant IMVP-7 step-down
controllers with two integrated gate drivers. Advanced
control features such as D-CAP™+ architecture with
overlapping pulse support (undershoot reduction,
USR) and overshoot reduction (OSR) provide fast
transient response, lowest output capacitance and
high efficiency. All of these controllers also support
single-phase operation for light loads. The full
compliment of IMVP-7 I/O is integrated into the
controllers including dual PGOOD signals, ALERT
and VR_HOT. Adjustable control of V_CORE slew rate
and voltage positioning round out the IMVP-7
features. In addition, the controllers' CPU channel
includes two high-current FET gate drivers to drive
high-side and low-side N-channel FETs with
exceptionally high speed and low switching loss. The
TPS51601 or TPS51601A driver is used for the third
phase of the CPU and the GPU channel.
The BOOT voltage (V_BOOT) on the TPS51640A and
TPS59640 is 0 V. The TPS59641 is specifically
designed for a V_BOOT level of 1.1 V.
These controllers are packaged in a space saving,
thermally enhanced 48-pin QFN. The TPS51640A is
rated to operate from –10°C to 105°C. The
TPS59640 and TPS59641 are rated to operate
from –40°C to 105°C.
APPLICATIONS
• IMVP-7 V_CORE Applications for Adapter,
Battery, NVDC or 3 V/5 V/12 V rails
SIMPLIFIED APPLICATION
Processor
3-phase CPU
Controller
IMVP-7
SVID Interface
Internal
FET Driver
Internal
FET Driver
TPS51601
FET Driver
CPU Power Stage
VCC_CPU
1-phase GPU
Controller
TPS51640
TPS51601
FET Driver
GPU Power Stage
VCC_GFX
UDG-11062
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
D-CAP+, PowerPAD, D-CAP are trademarks of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated