ISL6322G Datasheet, PDF (7/39 Pages) Intersil Corporation – Two-Phase Buck PWM Controller with Integrated MOSFET Drivers, I2C Interface and Phase Dropping

ISL6322G
Electrical Specifications Recommended Operating Conditions, 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
TEST CONDITIONS
MIN
TYP
MAX UNITS
DAC Input High Voltage (VR10, VR11)
0.8
V
DAC Input Low Voltage (AMD)
0.6
V
DAC Input High Voltage (AMD)
1.0
V
PIN-ADJUSTABLE OFFSET
OFS Sink Current Accuracy (Negative Offset)
OFS Source Current Accuracy (Positive Offset)
ERROR AMPLIFIER
R_OFS = 10kΩ from OFS to GND
R_OFS = 30kΩ from OFS to VCC
37.0
40.0
43.0 µA
50.5
53.5
56.5 µA
DC Gain
Gain-Bandwidth Product
Slew Rate
Maximum Output Voltage
R_L = 10k to ground, (Note 3)
C_L = 100pF, R_L = 10k to ground, (Note 3)
C_L = 100pF, Load = ±400µA, (Note 3)
Load = 1mA
96
20
8
3.90
4.20
dB
MHz
V/µs
V
Minimum Output Voltage
Load = -1mA
1.30
1.5
V
SOFT-START RAMP
Soft-Start Ramp Rate
VR10/VR11, R_S = 100kΩ
AMD
1.563
2.063
mV/µs
mV/µs
Adjustment Range of Soft-Start Ramp Rate (Note 3)
0.625
6.25 mV/µs
PWM OUTPUT
PWM Output Voltage LOW Threshold
PWM Output Voltage HIGH Threshold
CURRENT SENSING
I_Load = ±500µA
I_Load = ±500µA
0.5
V
4.5
V
Current Sense Resistance, R_ISEN
Sensed Current Tolerance
T = +25°C
ISEN1 + ISEN2 = 80µA
297
300
303
Ω
69
78
85
µA
OVERCURRENT PROTECTION
Overcurrent Trip Level - Average Channel
1-Phase normal operation
110
126
140
µA
2-Phase normal operation
224
252
280
µA
1-Phase Dynamic VID change
142
164
184
µA
2-Phase Dynamic VID change
290
327
360
µA
Overcurrent Trip Level - Individual Channel
Normal operation
150
177
204
µA
Dynamic VID change (Note 3)
209.4
238
266.6 µA
PROTECTION
Undervoltage Threshold
VSEN falling
55
60
65 %VID
Undervoltage Hysteresis
VSEN rising
10
%VID
Overvoltage Threshold During Soft-Start
VR10/VR11
1.24
1.28
1.32
V
AMD
2.13
2.20
2.27
V
Overvoltage Threshold (Default)
VSEN rising
VDAC + VDAC + VDAC + V
225mV 250mV 275mV
Overvoltage Threshold (Alternate)
VSEN rising
VDAC + VDAC + VDAC + V
150mV 175mV 200mV
Overvoltage Hysteresis
VSEN falling
100
mV
7
FN6715.0
May 22, 2008