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Intersil Electronic Components Datasheet

ISL6550C Datasheet

SAM Supervisor And Monitor

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®
Data Sheet
ISL6550A, ISL6550B, ISL6550C
July 2003
FN9036.2
SAM (Supervisor And Monitor)
The ISL6550 is a precision, flexible, VID-code-controlled
reference and voltage monitor for high-end microprocessor
and memory power supplies. It monitors various input
signals, and supervises the system (typically a DC/DC
converter) with its output signals. See the Block Diagram for
reference.
The ISL6550 includes a 5-bit DAC (Digital-to-Analog
Converter), which is programmed by the five VID inputs. The
voltage range of the BDAC (Buffered DAC output) is
determined by the DACHI and DACLO voltage levels, which
are externally adjustable through the R1, R2, R3 resistor
divider network. VREF5 is a precision-trimmed 5V reference,
and is used to set the voltage at the top of the resistor
divider.
Programmable window comparators monitor Over-Voltage
(OV) and Under-Voltage (UV) levels. The OVUVSEN input,
usually coming from the associated power converter device
is monitored and compared with BDAC; an error band is
established via the R4 and R5 resistor setting on the
OVUVTH pin. An optional external capacitor on the UVDLY
pin gives a programmable delay on the UV. A high gain
operational amplifier is available at pins VOPP, VOPM, and
VOPOUT; it can be used as a gain stage to permit
monitoring voltages that are different from the BDAC levels.
The PEN (Power supply ENable) input, driven from an open-
collector source, enables (when logic high) the external
converter output, via the PGOOD or START outputs (both
open-drain). They both basically indicate that the power
supply is enabled (PEN = high) and there are no fault
conditions. There are three logic options available, which
determine the START and PGOOD states; see the block
diagram or the Logic Options Table for more detail. The
three logic options are identified with a suffix letter A, B, or C
in the ordering information.
Features
• 12V supply operation
• 5V reference output
• 5-bit digital-to-analog converter
• Programmable DAC Range, within 0.8–5.0V
• Programmable undervoltage and overvoltage thresholds,
and latched fault detection
• Optional delayed undervoltage (programmable with
external capacitor)
• Undervoltage lockout (power-on-reset)
• Status Indicators (START, PGOOD)
• Uncommitted operational amplifier
• Compatible with ISL6551 full bridge controller
• 20 Lead SOIC and 20 lead QFN (5x5) packages
Applications
• Power Supplies for High End Microprocessors and Servers
• Can be paired with the ISL6551 FBC for a complete full-
bridge 48V-input converter, or used independently
Ordering Information
PART
NUMBER
TEMP. RANGE
(oC) PACKAGE PKG. DWG. #
ISL6550AIB
-40 to 85 20 Lead SOIC M20.3
ISL6550BIB
-40 to 85 20 Lead SOIC M20.3
ISL6550CIB
-40 to 85 20 Lead SOIC M20.3
ISL6550AIR
-40 to 85 20 Lead QFN L20.5x5
ISL6550BIR
-40 to 85 20 Lead QFN L20.5x5
ISL6550CIR
-40 to 85 20 Lead QFN L20.5x5
NOTE: The same part numbers with a “-T” suffix are available as
Tape and Reel.
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 registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.


Intersil Electronic Components Datasheet

ISL6550C Datasheet

SAM Supervisor And Monitor

No Preview Available !

ISL6550A, ISL6550B, ISL6550C
Pinout
20 PIN WIDE BODY (SOIC)
TOP VIEW
VCC 1
VOPP 2
VOPM 3
VOPOUT 4
VREF5 5
GND 6
BDAC 7
OVUVTH 8
DACHI 9
DACLO 10
20 UVDLY
19 OVUVSEN
18 PGOOD
17 START
16 PEN
15 VID0
14 VID1
13 VID2
12 VID3
11 VID4
20 PIN 5X5 (QFN)
TOP VIEW
20 19 18 17 16
VID1 1
VID0 2
15 OVUVTH
14 BDAC
PEN 3
13 GND
START 4
PGOOD 5
12 VREF5
11 VOPOUT
6 7 8 9 10
2


Part Number ISL6550C
Description SAM Supervisor And Monitor
Maker Intersil Corporation
Total Page 11 Pages
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