ISL6420A Просмотр технического описания (PDF) - Intersil
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ISL6420A Datasheet PDF : 20 Pages
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ISL6420A
Electrical Specifications
PARAMETER
Operating Conditions, Unless Otherwise Noted: VIN = 12V, PVCC shorted with VCC5, TA = 25°C (Continued)
SYMBOL
TEST CONDITIONS
MIN
TYP MAX UNITS
REFERENCE AND SOFT-START/ENABLE
Internal Reference Voltage
Reference Voltage Accuracy
Soft-Start Current
Soft-Start Threshold
Enable Low (Converter disabled)
VREF
-
0.600
-
V
TA = -40°C to 85°C, VIN = 5.6V to 28V
-1.0
-
+1.0
%
ISS
-
10
-
µA
VSOFT
1.0
-
-
V
-
-
1.0
V
PWM CONTROLLER GATE DRIVERS
Gate Drive Peak Current
-
0.7
-
A
Rise Time
Co = 1000pF
-
20
-
ns
Fall Time
Co = 1000pF
-
20
-
ns
Dead Time Between Drivers
-
20
-
ns
ERROR AMPLIFIER
DC Gain (Note 7)
-
88
-
dB
Gain-Bandwidth Product (Note 7)
GBW
-
15
-
MHz
Slew Rate (Note 7)
SR
-
6
-
V/µs
OVERCURRENT PROTECTION
OCSET Current Source
IOCSET
Dynamic Current Limit ON time
TOCON
Dynamic Current Limit OFF time
TOCOFF
POWER GOOD AND CONTROL FUNCTIONS
VOCSET = 4.5V
Frequency = 300kHz
Frequency = 300kHz
80
100
120
µA
-
20
-
ms
-
128
-
ms
Power-Good Lower Threshold
Power-Good Higher Threshold
PGOOD Leakage Current
PGOOD Voltage Low
PGOOD Delay
VPG- Fraction of the set point; ~3µs noise filter -14
-10
-8
%
VPG+
Fraction of the set point; ~3µs noise filter
9
-
16
%
IPGLKG VPULLUP = 5.5V
-
-
1
µA
IPGOOD = 4mA
-
-
0.5
V
CDEL = 0.1µF
-
125
-
ms
CDEL Current for PGOOD
CDEL threshold = 2.5V
-
2
-
µA
CDEL Threshold
-
2.5
-
V
EXTERNAL REFERENCE
MIn External Reference Input at
GPIO1/REFIN.
VMSET/MODE = H, CREFOUT = 2.2µF
-
0.600
-
V
Max External Reference Input at
GPIO1/REFIN.
VMSET/MODE = H, CREFOUT = 2.2µF
-
-
1.250
V
REFERENCE BUFFER
Buffered Output Voltage - Internal Reference VREFOUT IREFOUT = 1mA,
VMSET/MODE = High,
0.583 0.595 0.607
V
CREFOUT = 2.2µF, TA = -40°C to 85°C
Buffered Output Voltage - Internal Reference VREFOUT IREFOUT = 20mA,
VMSET/MODE = High,
0.575 0.587 0.599
V
CREFOUT = 2.2µF, TA = -40°C to 85°C
Buffered Output Voltage - External Reference
VREFOUT
VREFIN = 1.25V, IREFOUT = 1mA,
VMSET2/MODE = High,
CREFOUT = 2.2µF
1.227 1.246 1.265
V
7
FN9169.1
October 13, 2005
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