ISL6524 Datasheet, PDF (5/16 Pages) Intersil Corporation – VRM8.5 PWM and Triple Linear Power System Controller

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted. Refer to Figures 1, 2 and 3 (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNITS
Gain-Bandwidth Product
GBWP Note 2
-
15
-
MHz
Slew Rate
SR
COMP = 10pF, Note 2
-
6
-
V/µs
PWM CONTROLLERS GATE DRIVERS
UGATE Source
UGATE Sink
LGATE Source
LGATE Sink
PROTECTION
I_UGATE
R_UGATE
I_LGATE
R_LGATE
VCC = 12V, V_UGATE = 6V
V_GATE-PHASE = 1V
VCC = 12V, V_LGATE = 1V
V_LGATE = 1V
-
1
-
A
-
1.7 3.5
Ω
-
1
-
A
-
1.4 3.0
Ω
FAULT Sourcing Current
OCSET Current Source
Soft-Start Current
POWER GOOD
I_OVP
I_OCSET
I_SS13,24
V_FAULT/RT = 2.0V
V_OCSET = 4.5V_DC
V_SS13,24 = 2.0V_DC
-
8.5
-
mA
170 200 230
µA
-
28
-
µA
VSEN1 Upper Threshold
(VSEN1/DACOUT)
VSEN1 Rising
108
-
110
%
VSEN1 Undervoltage
(VSEN1/DACOUT)
VSEN1 Rising
92
-
94
%
VSEN1 Hysteresis (VSEN1/DACOUT)
VSEN1 Falling
-
2
-
%
PGOOD Voltage Low
VSEN2 Undervoltage
V_PGOOD
I_PGOOD = -4mA
VSEN2 Rising
-
-
0.8
V
1.08
V
VSEN2 Hysteresis
VSEN2 Falling
-
48
-
mV
VTTPG Voltage Low
NOTE:
2. Guaranteed by design
V_VTTPG I_VTTPG = -4mA
-
-
0.8
V
Typical Performance Curves
1000
100
R_T PULLUP
TO +12V
10
R_T PULLDOWN TO V_SS
10
100
SWITCHING FREQUENCY (kHz)
FIGURE 4. R_T RESISTANCE vs FREQUENCY
1000
100
C_UGATE = C_LGATE = C
VIN = 5V
80 VCC = 12V
C = 4800pF
60
C = 3600pF
40
C = 1500pF
20
C = 660pF
0
100 200 300 400 500 600 700 800 900 1000
SWITCHING FREQUENCY (kHz)
FIGURE 5. BIAS SUPPLY CURRENT vs FREQUENCY
5
FN9015.3
April 18, 2005