ISL6420 Datasheet, PDF (7/19 Pages) Intersil Corporation – Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller

ISL6420
Electrical Specifications
PARAMETER
Operating Conditions, Unless Otherwise Noted: VIN = 12V, PV_CC shorted with V_CC5, T_A = 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)
V_REF
-
0.6
-
V
T_A = -40°C to 85°C, VIN = 5.6V to 16V
-1.0
-
+1.0
%
I_SS
-
10
-
µA
V_SOFT
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)
Guaranteed by Design
-
88
-
dB
Gain-Bandwidth Product (Note 7)
GBW
-
15
-
MHz
Slew Rate (Note 7)
SR
-
6
-
V/µs
PROTECTION
OCSET Current Source
I_OCSET
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
V_PG- Fraction of the set point; ~3µs noise filter -14
-10
-8
%
V_PG+ Fraction of the set point; ~3µs noise filter 10
-
16
%
I_PGLKG V_PULLUP = 5.5V
-
-
1
µA
I_PGOOD = 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
External Reference Input Range at
GPIO1/REFIN.
VMSET/MODE = H, C_REFOUT = 2.2µF
0.6
-
1.25
V
REFERENCE BUFFER
Buffered Output Voltage - Internal Reference V_REFOUT I_REFOUT = 20mA,
VMSET/MODE = HIGH,
0.585 0.6V 0.615
V
C_REFOUT = 2.2µF, T_A = -40°C to 85°C
Buffered Output Voltage - External Reference
V_REFOUT
V_REFIN = 1.25V, I_REFOUT = 20mA,
VMSET/MODE = HIGH,
C_REFOUT = 2.2µF
Vrefin
-
Vrefin
V
-0.01
+0.01
Current Drive Capability
C_REFOUT = 2.2µF
20
-
-
mA
7
FN9151.4
July 18, 2005