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參數(shù)資料
| 型號： | ISL6211CA-T |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Crusoe⑩ Processor Core-Voltage Regulator |
| 中文描述： | SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | PLASTIC, SSOP-24 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 257K |
| 代理商： | ISL6211CA-T |
1
TM
ISL6211
Crusoe Processor Core-Voltage
Regulator
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
measures are taken to allow such a transition with controlled
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.
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
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
by sensing the voltage drop across the lower MOSFET. The
overcurrent threshold is set by an external resistor. If
precision overcurrent protection is required, an external
current-sense resistor may optionally be used.
Pinout
ISL6211 (SSOP)
TOP VIEW
Features
High Efficiency Over Wide Load Range
Loss-Less Current-Sense Scheme
- Uses MOSFET’s R
DS(ON)
- Optional Current-Sense Resistor for Higher Tolerance
Overcurrent Protection
Powerful Gate Drivers with Adaptive Dead Time
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
Selectable Forced Continuous Conduction Mode of
Operation
Power-Good Output Voltage Monitor
No Negative Core Voltage on Turn-off
Over-Voltage, Under-Voltage and Over-Current Fault
Monitors
300/600kHz Selectable Switching Frequency
Applications
Mobile PCs
Web Tablets
Internet Appliances
VCC
FCCM
VID1
VID0
PVCC
UGATE
BOOT
PGND
SOFT
EN
VSEN
NC
GND
LGATE
VID3
VID2
ISEN
VIN
VID4
PHASE
PGOOD
OCSET
24
23
22
21
1
2
3
4
5
6
7
8
9
10
11
12
13
14
18
17
16
15
19
20
ALTV
FREQ
Ordering Information
PART NUMBER
TEMP. (
o
C)
PACKAGE
PKG. NO.
ISL6211CA
-10 to 85
24 Ld SSOP
M24.15
ISL6211CA-T
-10 to 85
24 Ld SSOP,
Tape and Reel
M24.15
FN9043.1
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.
Data Sheet
November 2001
NOT RECOMMENDED FOR NEW DESIGNS
NO RECOMMENDED REPLACEMENT
contact our Technical Support Center at
1-888-INTERSIL or www.intersil.com/design
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