ISL6398 Datasheet, PDF (11/57 Pages) Intersil Corporation – Programmable soft-start rate and DVID rate

ISL6398
Electrical Specifications Recommended Operating Conditions, V_CC = 5V, Unless Otherwise specified. Boldface limits apply across the
operating temperature range. (Continued)
PARAMETER
TEST CONDITIONS
MIN
MAX
(Note 7) TYP (Note 7) UNITS
OSCILLATORS
Accuracy of Switching Frequency Setting
390kHz, F3[2:0] = 0h = Original, ISL6398HRTZ
390kHz, F3[2:0] = 0h = Original, ISL6398IRTZ
355 390 425 kHz
348 390 425 kHz
Maximum Switching Frequency
- 2.025 -
MHz
Minimum Switching Frequency
- 0.120 -
MHz
DVID = 0.3125mV/µs, Minimum
0.3125 -
- mV/µs
Soft-start Ramp Rate
DVID = 2.5mV/µs
DVID = 5.0mV/µs
2.5 3.0 3.4 mV/µs
5.0 6.0 7.0 mV/µs
DVID = 13.25mV/µs, Maximum
13.25 -
- mV/µs
Minimum Dynamic VID Slew Rate
DVID = 0.3125mV/µs, Minimum
0.3125 -
- mV/µs
Maximum Dynamic VID Slew Rate
DVID = 13.25mV/µs, Maximum
13.25 -
- mV/µs
Maximum Duty Cycle Per PWM
390kHz
95
98
99
%
PWM GENERATOR
Sawtooth Amplitude
BUFFERED COMP AMPLIFIER
VR_{RAMP_ADJ} = 0.7V, ISENIN+ = 12V
VR_{RAMP_ADJ} = 1.0V, ISENIN+ = 12V
VR_{RAMP_ADJ} = 1.2V, ISENIN+ = 12V
VR_{RAMP_ADJ} = 1.5V, ISENIN+ = 12V
-
0.7
-
V
-
1.0
-
V
-
1.2
-
V
-
1.5
-
V
Open-Loop Gain
Open-Loop Bandwidth
R_L = 10k to ground
-
96
-
dB
-
20
-
MHz
Maximum Output Voltage
No Load
3.6 4.0
-
V
Output High Voltage
1mA Load
3.4 3.9
-
V
Output Low Voltage
1mA Load
1.88
1.99
V
PWM OUTPUT (PWM[6:1])
PWM = Low with 1mA Load, for Fast Transition
-
80
-

PWM[6:1] Sink Impedance
PWM = Low with 1mA Load, ISL6398HRTZ
170 285 425

PWM = Low with 1mA Load, ISL6398IRTZ
170 285 400

PWM[6:1] Source Impedance
PWM = High, Forced to 3.7V
60 125 210

PWM Mid-Level
0.4mA Load, 5V PWM
36
40
44 %VCC
PWM Mid-Level
0.4mA Load, 3.3V PWM
24
28
31 %VCC
CURRENT SENSE AND OVERCURRENT PROTECTION
Sensed Current Tolerance
CS Offset and Mirror Error Included,
R_SET = 12.8k
(T_J = 0°C to +70°C)
(T_J = -40°C to +100°C, HRTZ, IRTZ)
Average OC Trip Level at Normal CCM PWM Mode (T_J = 0°C to +70°C)
CS Offset and Mirror Error Included,
R_SET = 12.8k
(T_J = -40°C to +100°C, HRTZ, IRTZ)
Average Overcurrent Trip Level at PSI1/2/3 Mode (T_J = 0°C to +70°C)
CS Offset and Mirror Error Included,
R_SET = 12.8k
(T_J = -40°C to +100°C, HRTZ, IRTZ)
73
78 82.5 µA
72
78
83
µA
96 103 111 µA
95 103 112 µA
92 107 122 µA
90 125 124 µA
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FN8575.1
August 13, 2015