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Renesas Electronics Components Datasheet

ISL6569A Datasheet

Multi-Phase PWM Controller

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ISL6569A
Multi-Phase PWM Controller
NOT RECOMMENDED FOR NEW DESIGNS
NO RECOMMENDED REPLACEMENT
contact our Technical Support Center at
1-888-INTERSIL or www.intersil.com/tsc
DATASHEET
FN9092
Rev 2.00
Dec 29, 2004
The ISL6569A provides core-voltage regulation by driving
two interleaved synchronous-rectified buck-converter
channels in parallel. Interleaving the channel timing results
in increased ripple frequency which reduces input and output
ripple currents. The reduction in ripple results in lower
component cost, reduced dissipation, and a smaller
implementation area.
The ISL6569A uses cost and space-saving rDS(ON) sensing
for channel current balance, active voltage positioning, and
over-current protection. Output voltage is monitored by an
internal differential remote sense amplifier. A high-bandwidth
error amplifier drives the output voltage to match the
programmed 5-bit DAC reference voltage. The resulting
compensation signal guides the creation of pulse width
modulated (PWM) signals to control companion Intersil
MOSFET drivers. The OFS pin allows direct offset of the
DAC voltage from 0V to 50mV using a single external
resistor. The reference and amplifiers are trimmed to ensure
a system accuracy of ± 0.5% over temperature.
Outstanding features of this controller IC include
Dynamic VIDTM technology allowing seamless on-the-fly VID
changing without the need of any external components.
Output voltage “droop” or active voltage positioning is
optional. When employed, it allows the reduction in size and
cost of the output capacitors required to support load
transients. A threshold-sensitive enable input allows the use
of an external resistor divider for start-up coordination with
Intersil MOSFET drivers or any other devices powered from
a separate supply.
Superior over-voltage protection is achieved by gating on the
lower MOSFET of all phases to crowbar the output voltage.
An optional second crowbar on VIN, formed with an external
MOSFET or SCR gated by the OVP pin, is triggered when
an over-voltage condition is detected. Under-voltage
conditions are detected, but PWM operation is not disrupted.
Over-current conditions cause a hiccup-mode response as
the controller repeatedly tries to restart. After a set number
of failed startup attempts, the controller latches off. A power
good logic signal indicates when the converter output is
between the UV and OV thresholds.
Features
• Multi-Phase Power Conversion
- 2 Phase Operation
• Active Channel Current Balancing
• Precision rDS(ON) Current Sharing
- Lossless
- Low Cost
• Input Voltage: 12V or 5V Bias
• Precision CORE Voltage Regulation
- ± 0.5% System Accuracy Over Temperature
- Differential Remote Output Voltage Sensing
- Programmable Reference Offset
• Microprocessor Voltage Identification Input
- 5-Bit VID Input
- 0.800V to 1.550V in 25mV Steps
- Dynamic VIDTM Technology
• Programmable Droop Voltage
• Fast Transient Recovery Time
• Over Current Protection
• Digital Soft Start
• Threshold Sensitive Enable Input
• High Ripple Frequency (160kHz to 2MHz)
• QFN Package:
- Compliant to JEDEC PUB95 MO-220
QFN - Quad Flat No Leads - Package Outline
- Near Chip Scale Package footprint, which improves
PCB efficiency and has a thinner profile
• Pb-Free Available (RoHS Compliant)
Applications
• AMD Hammer Family Processor Voltage Regulator
• Low Output Voltage, High Current DC-DC Converters
• Voltage Regulator Modules
Ordering Information
PART NUMBER
TEMP.
(oC)
PACKAGE
PKG.
DWG. #
ISL6569ACB
0 to 70 24 Ld SOIC
M24.3
ISL6569ACBZ (Note) 0 to 70 24 Ld SOIC (Pb-free) M24.3
ISL6569ACR
0 to 85 32 Ld 5x5 QFN
L32.5x5
ISL6569ACRZ (Note) 0 to 85 32 Ld 5x5 QFN (Pb-free) L32.5x5
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.
FN9092 Rev 2.00
Dec 29, 2004
Page 1 of 22


Renesas Electronics Components Datasheet

ISL6569A Datasheet

Multi-Phase PWM Controller

No Preview Available !

ISL6569A
Pinouts
ISL6569ACB (24 LD SOIC)
TOP VIEW
GND 1
OVP 2
VID4 3
VID3 4
VID2 5
VID1 6
VID0 7
OFS 8
COMP 9
FB 10
IOUT 11
VDIFF 12
24 EN
23 FS/DIS
22 PGOOD
21 ISEN1
20 PWM1
19 PWM2
18 GND
17 ISEN2
16 VCC
15 GND
14 RGND
13 VSEN
ISL6569ACR (32 LD 5x5 QFN)
TOP VIEW
32 31 30 29 28 27 26 25
VID2 1
24 NC
VID1 2
23 NC
VID0 3
22 ISEN1
NC 4
21 PWM1
OFS 5
20 PWM2
COMP 6
19 GND
FB 7
18 ISEN2
NC 8
17 NC
9 10 11 12 13 14 15 16
FN9092 Rev 2.00
Dec 29, 2004
Page 2 of 22


Part Number ISL6569A
Description Multi-Phase PWM Controller
Maker Renesas
Total Page 22 Pages
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