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PDF ISL16AHPEVAL1 Data sheet ( Hoja de datos )
| Número de pieza | ISL16AHPEVAL1 | |
| Descripción | Dual Power Supply Controller | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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TM
Data Sheet
ISL6118
May 2001
File Number 9008.1
Dual Power Supply Controller
The ISL6118 is a dual channel, fully independent overcurrent
(OC) fault protection IC for the +2.5V to +5.5V environment.
This device features internal current monitoring, accurate
current limiting, integrated power switches and current
limited delay to latch-off for system protection.
The ISL6118 current sense and limiting circuitry sets the
current limit to a nominal 0.6A, which is well suited for the
3.3V AUX ACPI application. The ISL6118 is the ideal
companion chip to the HIP1011D and HIP1011E dual PCI
hot plug controllers. Together these and the ISL6118 fully
control the four legacy PCI voltages (+/-12V, +3.3V, +5V) and
the 3.3V AUX, respectively for power control of two PCI slots
compliant to PCI Bus Power Management Interface Spec
Rev 1.1. Designed to be co-located with the HIP1011D on
the motherboard, the ISL6118 provides OC fault notification,
accurate current limiting and a consistent timed latch-off thus
isolating and protecting the voltage bus in the presence of an
OC event or short circuit during all PCI Bus Power States as
defined by the PCI specification. The 12ms time to latch-off
is independent of the adjoining switch’s electrical or thermal
condition and the OC response time is inversely related to
the OC magnitude.
Each ISL6118 incorporates in a single 8-lead SOIC
package two 80mΩ N-channel MOSFET power switches for
power control. Each switch is driven by a constant current
source giving a controlled ramp up of the output voltage.
This provides a soft start turn-on eliminating bus voltage
drooping caused by inrush current while charging heavy
load capacitances. Independent enabling inputs and fault
reporting outputs for each channel are compatible with 3V
and 5V logic to allow external control and monitoring.
The ISL6118 undervoltage (UV) feature prevents turn-on of
the outputs unless the correct ENABLE state and VIN >
2.5V are present. During initial turn-on the ISL6118
prevents fault reporting by blanking the fault signal. Rising
and falling outputs are current-limited voltage ramps so that
both the inrush current and voltage slew rate are limited,
independent of load. This reduces supply droop due to
surge and eliminates the need for external EMI filters.
During operation, once an OC condition is detected the
appropriate output is current limited for 12ms to allow
transient conditions to pass. If still in current limit after the
current limit period has elapsed, the output is latched off
and the fault is reported by pulling the corresponding
FAULT low. The FAULT signal is latched low until reset by
the ENABLE signal being de-asserted at which time the
FAULT signal will clear.
Features
• 80mΩ Integrated Power N-Channel MOSFET Switches
• Accurate Current Sensing and Limiting
• 12ms Fault Delay to Latch-Off, No Thermal Dependency
• 2.5V to 5.5V Operating Range
• Disabled Output Internally Pulled Low
• Undervoltage Lockout
• Controlled Turn-On Ramp Time
• Channel Independent Fault Output Signals
• Compatible with 3.3V and 5V Logic Families
• Channel Independent Logic Level Enable High Inputs
(ISL6118H) or Enable Low Inputs (ISL6118L)
Applications
• ACPI 3.3V AUX Control
• Electronic Circuit Limiting and Breaker
Ordering Information
TEMP. RANGE
PART NUMBER
(oC)
PACKAGE PKG. NO.
ISL6118LIB
-40 to 85 8 Ld SOIC M8.15
ISL6118LIB-T
-40 to 85 8 Ld SOIC Tape and Reel
ISL6118HIB
-40 to 85 8 Ld SOIC M8.15
ISL6118HIB-T
-40 to 85 8 Ld SOIC Tape and Reel
ISL6118EVAL1 ISL6118 Evaluation Platform
ISL16AHPEVAL1 ACPI (HIP1011D and ISL6118H) Evaluation
Platform
Pinout
ISL6118 (SOIC)
TOP VIEW
GND 1
VIN 2
ENABLE_1 3
ENABLE_2 4
8 FAULT_1
7 OUT_1
6 OUT_2
5 FAULT_2
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
1 page  
Typical Performance Curves
ISL6118
ON
ENABLE
FAULT
VOUT
OFF
LATCH-OFF SET
RESET BY
ENABLE
CURRENT REGULATION
SETTLING TIME (1.4ms)
OVERCURRENT
IOUT
0.6A CURRENT
LIMIT
12ms CURRENT REGULATION PERIOD
FIGURE 1. OPERATIONAL WAVEFORMS
120
110
100 VIN = 2.7V
90
80 VIN = 5V
70
60 VIN = 3.3V
50
40
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100
TEMPERATURE (oC)
FIGURE 2. SWITCH ON RESISTANCE AT 0.4A
3.1
700
-40oC
650
600 25oC
550
85oC
500
1.25 1.5
1.75 2.0 2.25 2.5
VOUT (V)
2.75 3.0
FIGURE 4. CURRENT REGULATION vs VOUT (VIN = 3.3V)
ENABLE
CL=0.1µF
tPD
560µs
CL = 100µF
CL = 10µF
VOUT
VOUT VOLTAGE (0.5V/DIV.)
TIME (400µs /DIV.)
FIGURE 3. VOUT SOFT START vs CL and PROP DELAY, Rl = 8Ω
700
-40oC
650
25oC
600
85oC
550
500
1.3 1.5 2.0 2.5 3.0 3.5 4.0 4.5 4.8
VOUT (V)
FIGURE 5. CURRENT REGULATION vs VOUT (VIN = 5V)
5
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