ISL6211 Datasheet, PDF (1/16 Pages) Intersil Corporation – Crusoe™ Processor Core-Voltage Regulator

N^{TMO1cTN-o8ORn8t8EaR-CIcENtOCToMD}_EOuRM^aMr _S^tETMa_IeNLE^S_cDoNh^{hErnDeDwiEecwDtFawlORS.RiEunPNptepLEroAsWirClt.cDECoEMemSnE/ItdNGeeTrNsaSigtNnovember 2001}
Crusoe™ Processor Core-Voltage
Features
ISL6211
FN9043.1
Regulator
• High Efficiency Over Wide Load Range
The ISL6211 is a single-output power-controller to power
core of Transmeta’s Crusoe™ CPU. The ISL6211 includes a
5-bit digital-to-analog converter (DAC) that adjusts the core
PWM output voltage from 0.6VDC to 1.75VDC. The DAC
settings may be changed during operation. Special
• Loss-Less Current-Sense Scheme
- Uses MOSFET’s R_DS(ON)
- Optional Current-Sense Resistor for Higher Tolerance
Overcurrent Protection
measures are taken to allow such a transition with controlled
• Powerful Gate Drivers with Adaptive Dead Time
slew rate to comply with Transmeta’s LongRun™
technology. A precise reference and a proprietary
architecture with integrated compensation provide excellent
static and dynamic core voltage regulation.
In nominal currents, the controller operates at a selectable
frequency of 300kHz or 600kHz. When the filter inductor
current becomes discontinuous, the controller operates in a
hysteretic mode dramatically improving system efficiency.
The hysteretic mode of operation can be inhibited by a
designated control pin.
• Summing Current-Mode Control and On-Chip Active
Droop for Optimum Transient Response
• TTL-Compatible 5-Bit Digital Output Voltage Selection
- Wide Range - 0.6VDC to 1.0VDC in 25mV Steps, and
from 1.0VDC to 1.75VDC in 50mV Steps
- “On-the-Fly” VID code change with customer
programmable slew rate
• Alternative Input to Set Output Voltage During Start-up or
Power Saving Modes
The ISL6211 monitors the output voltage. A Power-Good
signal is issued when soft start is completed and the output
is in regulation. A built-in over-voltage protection prevents
• Selectable Forced Continuous Conduction Mode of
Operation
• Power-Good Output Voltage Monitor
the load from seeing output voltages higher than 1.9V.
Under-voltage protection latches the chip off when the
output drops below 75% of the set value. The PWM
controller's over-current circuitry monitors the converter load
• No Negative Core Voltage on Turn-off
• Over-Voltage, Under-Voltage and Over-Current Fault
Monitors
by sensing the voltage drop across the lower MOSFET. The
• 300/600kHz Selectable Switching Frequency
overcurrent threshold is set by an external resistor. If
precision overcurrent protection is required, an external
Applications
current-sense resistor may optionally be used.
• _{Mobile PCs}
Pinout
• _{Web Tablets}
ISL6211 (SSOP)
TOP VIEW
GND ₁
VCC 2
PGOOD 3
EN 4
FCCM 5
ALTV 6
FREQ 7
VID4 8
24 PVCC
23 LGATE
22 PGND
21 ISEN
20 PHASE
19 UGATE
18 _BOOT
17 NC
• _{Internet Appliances}
Ordering Information
PART NUMBER TEMP. (^oC)
PACKAGE
PKG. NO.
ISL6211CA
-10 to 85 24 Ld SSOP
M24.15
ISL6211CA-T
-10 to 85 24 Ld SSOP, M24.15
Tape and Reel
VID3 9
VID2 ₁₀
VID1 11
VID0 12
16 VSEN
15 OCSET
14 SOFT
13 _VIN
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2001. All Rights Reserved
Crusoe™ and LongRun™ are trademarks of Transmeta Corporation.