ISL6535 Datasheet, PDF (5/14 Pages) Intersil Corporation – Synchronous Buck Pulse-Width Modulator PWM Controller

ISL6535
Electrical Specifications Recommended Operating Conditions, unless otherwise noted specifications in bold are valid for process,
temperature, and line operating conditions. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Soft-start Current
I_SS
REFERENCE
22
30
38
µA
Reference Voltage
System Accuracy
REFIN Current Source (QFN Only)
T_J = 0°C to +70°C
T_J = -40°C to +85°C
T_J = 0°C to +70°C
T_J = -40°C to +85°C
0.591 0.597 0.603
V
0.588 0.597 0.606
V
-1.0
-
1.0
%
-1.5
-
1.5
%
-4
-6
-8
µA
REFIN Threshold (QFN Only)
2.10
-
3.50
V
REFIN Offset (QFN Only)
-3
-
3
mV
GATE DRIVERS
Upper Drive Source Current
I_{U_SOURCE} V_BOOT - V_PHASE = 12V, 3nF Load (Note 3)
-
1.25
-
A
Upper Drive Source Impedance
R_{U_SOURCE} 90mA Source Current
-
2.0
-
Ω
Upper Drive Sink Current
I_{U_SINK} V_BOOT - V_PHASE = 12V, 3nF Load (Note 3)
-
2
-
A
Upper Drive Sink Impedance
R_{U_SINK} 90mA Source Current
-
1.3
-
Ω
Lower Drive Source Current
I_{L_SOURCE} V_PVCC = 12V, 3nF Load (Note 3)
-
2
-
A
Lower Drive Source Impedance
R_{L_SOURCE} 90mA Source Current
-
1.3
-
Ω
Lower Drive Sink Current
I_{L_SINK} V_PVCC = 12V, 3nF Load (Note 3)
-
3
-
A
Lower Drive Sink Impedance
R_{L_SINK} 90mA Source Current
-
0.94
-
Ω
SSDONE (QFN ONLY)
SSDONE Low Output Voltage
I_SSDONE = 2mA
-
-
0.30
V
Typical Performance Curves
1000
R_RT PULL-UP
TO +12V
100
R_RT PULLDOWN
TO GND
10
10k
100k
1M
SWITCHING FREQUENCY (Hz)
FIGURE 1. R_RT RESISTANCE vs FREQUENCY
80
70
60
C_GATE = 3300pF
50
C_GATE = 1000pF
40
30
20
10
C_GATE = 10pF
0
100 200 300 400 500 600 700 800 900 1000
SWITCHING FREQUENCY (kHz)
FIGURE 2. BIAS SUPPLY CURRENT vs FREQUENCY
5
FN9255.1
May 5, 2008