900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Renesas Electronics Components Datasheet

ISL6524 Datasheet

VRM8.5 PWM and Triple Linear Power System Controller

No Preview Available !

DATASHEET
ISL6524
VRM8.5 PWM and Triple Linear Power System Controller
FN9015
Rev 3.00
Apr 18, 2005
The ISL6524 provides the power control and protection for
four output voltages in high-performance microprocessor
and computer applications. The IC integrates one PWM
controller and three linear controllers, as well as the
monitoring and protection functions into a 28-pin SOIC
package. The PWM controller regulates the microprocessor
core voltage with a synchronous-rectified buck converter.
One linear controller supplies the computer system’s AGTL+
1.2V bus power. The other two linear controllers regulate
power for the 1.5V AGP bus and the 1.8V power for the chip
set core voltage and/or cache memory circuits.
The ISL6524 includes an Intel VRM8.5 compatible, TTL
5-input digital-to-analog converter (DAC) that adjusts the
microprocessor core-targeted PWM output voltage from
1.050V to 1.825V in 25mV steps. The precision reference and
voltage-mode control provide ±1% static regulation. The linear
regulators use external N-channel MOSFETs or bipolar NPN
pass transistors to provide fixed output voltages of 1.2V ±3%
(VOUT2), 1.5V ±3% (VOUT3) and 1.8V ±3% (VOUT4).
The ISL6524 monitors all the output voltages. A delayed-
rising VTT (VOUT2 output) Power Good signal is issued
before the core PWM starts to ramp up. Another system
Power Good signal is issued when the core is within ±10% of
the DAC setting and all other outputs are above their under-
voltage levels. Additional built-in overvoltage protection for
the core output uses the lower MOSFET to prevent output
voltages above 115% of the DAC setting. The PWM
controllers’ overcurrent function monitors the output current
by using the voltage drop across the upper MOSFET’s
rDS(ON), eliminating the need for a current sensing resistor.
Ordering Information
TEMP.
PART NUMBER RANGE (°C)
PACKAGE
PKG.
DWG. #
ISL6524CB*
0 to 70 28 Ld SOIC
M28.3
ISL6524CBZ*
(See Note)
0 to 70
28 Ld SOIC
(Pb-free)
M28.3
ISL6524CBZA*
(See Note)
0 to 70
28 Ld SOIC
(Pb-free)
M28.3
ISL6524EVAL1
Evaluation Board
*Add “-T” suffix for tape and reel.
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which are RoHS compliant and compatible
with both SnPb and Pb-free soldering operations. Intersil Pb-free
products are MSL classified at Pb-free peak reflow temperatures that
meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
Features
• Provides 4 Regulated Voltages
- Microprocessor Core, AGTL+ Bus, AGP Bus Power,
and North/South Bridge Core
• Drives N-Channel MOSFETs
• Linear Regulator Drives Compatible with both MOSFET
and Bipolar Series Pass Transistors
• Simple Single-Loop Control Design
- Voltage-Mode PWM Control
• Fast PWM Converter Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Ratio
• Excellent Output Voltage Regulation
- Core PWM Output: ±1% Over Temperature
- All Other Outputs: ±3% Over Temperature
• VRM8.5 TTL-Compatible 5-Bit DAC Microprocessor Core
Output Voltage Selection
- Wide Range - 1.050V to 1.825V
• Power-Good Output Voltage Monitors
- Separate delayed VTT Power Good
• Overcurrent Fault Monitor
- Switching Regulator Doesn’t Require Extra Current
Sensing Element, Uses MOSFET’s rDS(ON)
• Small Converter Size
- Constant Frequency Operation
- 200kHz Internal Oscillator
• Pb-Free Available (RoHS Compliant)
Applications
Motherboard Power Regulation for Computers
Pinout
ISL6524 (SOIC) TOP VIEW
DRIVE2 1
FIX 2
VID3 3
VID2 4
VID1 5
VID0 6
VID25 7
PGOOD 8
VTTPG 9
FAULT/RT 10
VSEN2 11
SS24 12
SS13 13
VSEN4 14
28 VCC
27 UGATE
26 PHASE
25 LGATE
24 PGND
23 OCSET
22 VSEN1
21 FB
20 COMP
19 VSEN3
18 DRIVE3
17 GND
16 VAUX
15 DRIVE4
FN9015 Rev 3.00
Apr 18, 2005
Page 1 of 17


Renesas Electronics Components Datasheet

ISL6524 Datasheet

VRM8.5 PWM and Triple Linear Power System Controller

No Preview Available !

Block Diagram
DRIVE3
DRIVE4
VSEN4
FIX
DRIVE2
VSEN2
VSEN3
VSEN1
OCSET
VCC
VAUX
EA3
-
+
+-
EA4
1.5V or 1.26V
x0.75
x0.75
+ 1.8V or 1.26V
-
- UV3
+
+- UV4
x 1.10
x 0.90
x0.90
+
- 1.2V
UV2
SET
Q
CLK
QD
CLR
INHIBIT
-
+ EA2
OV
SOFT-
START
AND FAULT
LOGIC
FAULT
VCC
x 1.15
OSCILLATOR
28A
4.5V
28A
4.5V
POWER-ON
RESET (POR)
+- 200A
+
-
+-
OC +-
VCC
DRIVE1
+
-
EA1
DACOUT
+
-
PWM
COMP
PWM
GATE
CONTROL
SYNCH
DRIVE
TTL D/A
CONVERTER
(DAC)
VCC
VAUX
PGOOD
UGATE
PHASE
LGATE
PGND
GND
VTTPG
FAULT/RT SS13
SS24
FIGURE 1.
FB COMP VID3 VID2 VID1 VID0 VID25


Part Number ISL6524
Description VRM8.5 PWM and Triple Linear Power System Controller
Maker Renesas
Total Page 17 Pages
PDF Download

ISL6524 Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 ISL6520 Single Synchronous Buck Pulse-Width Modulation (PWM) Controller
Renesas
2 ISL6520A Single Synchronous Buck Pulse-Width Modulation (PWM) Controller
Renesas
3 ISL6520B Single Synchronous Buck Pulse-Width Modulation (PWM) Controller
Renesas
4 ISL6521 PWM Buck DC-DC and Triple Linear Power Controller
Renesas
5 ISL6522 Buck and Synchronous Rectifier Pulse-Width Modulator (PWM) Controller
Renesas
6 ISL6522A Buck and Synchronous Rectifier Pulse-Width Modulator (PWM) Controller
Renesas
7 ISL6522B Buck and Synchronous Rectifier Pulse-Width Modulator (PWM) Controller
Renesas
8 ISL6523 VRM8.5 Dual PWM and Dual Linear Power System Controller
Renesas
9 ISL6523A VRM8.5 Dual PWM and Dual Linear Power System Controller
Intersil Corporation





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy