English
Language : 

ISL6420B Datasheet, PDF (7/20 Pages) Intersil Corporation – Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller
◁
ISL6420B
Electrical Specifications
Operating Conditions: VIN = 12V, PVCC shorted with VCC5, TA = +25°C; Parameters with MIN and/or MAX
limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP MAX UNITS
REFERENCE AND SOFT-START/ENABLE
Internal Reference Voltage
Soft-Start Current
Soft-Start Threshold
Enable Low (Converter Disabled)
VREF
ISS
VSOFT
0.594
-
0.606
V
-
10
-
µA
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
POWER GOOD AND CONTROL FUNCTIONS
VOCSET = 4.5V
80
100
120
µA
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 = 5.0V (Note 8)
-
-
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
Buffered Output Voltage - External Reference
VREFOUT
VREFIN = 1.25V, IREFOUT = 20mA,
VMSET2/MODE = High,
CREFOUT = 2.2µF
1.219 1.238 1.257
V
7
FN6901.0
April 27, 2009
 ▷