ISL6617_14 Datasheet, PDF (7/15 Pages) Intersil Corporation – PWM Doubler with Phase Shedding Function and Output Monitoring Feature

ISL6617
Electrical Specifications These specifications apply for recommended ambient temperature, unless otherwise noted.
Boldface limits apply over the operating temperature range. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
(Note 6) TYP (Note 6) UNITS
Synchronization Mode Phase Shift
SYNC = 0V, PWM = 300kHz, 10% Width
0
°
PWM INPUT (PWMIN)
Sinking Impedance
Source Impedance
Minimum Pull-Up Current
Tri-State Rising Threshold
Tri-State Falling Threshold
PWM Pulled High Threshold
R_{PWM_SNK}
R_{PWM_SRC}
I_{PWM_SRC} EN_PH_SYNC = LOW
V_VCC = 5V (250mV Hysteresis)
V_VCC = 5V (300mV Hysteresis)
EN_PH = LOW, Ramping PWM low
55
kΩ
48
kΩ
40
mA
0.95 1.20 1.45
V
3.00 3.40 3.7
V
3.4
V
CURRENT SENSE (ISENA±, ISENB±, IOUT) AND PROTECTION (IOUT)
Sensed Current Tolerance
I_OUT
ISENA = ISENB = 0µA
ISENA = ISENB = 20µA
-6
0
6
µA
14
20
26
µA
ISENA = ISENB = 50µA
43
50
57
µA
ISENA = ISENB = 100µA
90
100 110
µA
Un-Tri State Trip For OVP
I_OUT
PWM OUTPUT (PWMA AND PWMB)
ENx = LOW TO HIGH, PWM = LOW
40
60
90
µA
Sourcing Impedance
R_{PWM_SRC} VCC = 5V
Sink Impedance
R_{PWM_SNK} VCC = 5V
Tri-State Level
V_PWMA/B VCC = 5V, EN_PH = LOW
SWITCHING TIME (See Figure 1 on Page 8)
45
100 200
Ω
45
100 125
Ω
1.65 2.00 2.6
V
PWMA/B Low to High Rise Time
t_R1
Unloaded, 10% to 90%
4.5
ns
PWMA/B Tri-State to High Rise Time
t_R2
Unloaded, 10% to 90%
4.5
ns
PWMA/B High to Low Fall Time
t_F1
Unloaded, 90% to 10%
4.0
ns
PWMA/B High to Tri-State Fall Time
t_F2
100% to 60% (3V), Assume Equavilent
255
ns
Loading of RC = 50kΩ*10pF = 500ns
PWMA/B Turn-On Propagation Delay
t_PDH Outputs Unloaded
35
ns
PWMA/B Turn-Off Propagation Delay
t_PDL Outputs Unloaded, excluding extension
35
ns
PWMA/B Extension
t_EXT
ENx = VCC, I_PWMA > I_PWMB
70
ns
ENx = VCC, I_PWMA < I_PWMB
70
ns
ENx = 80%*VCC, I_PWMA > I_PWMB
190
ns
ENx = 80%*VCC, I_PWMA < I_PWMB
190
ns
Tri-State to High or Low Propagation
t_PTS Outputs Unloaded, excluding extension
10
ns
Delay
Tri-State Shutdown Holdoff Time
t_TSSHD Including Propagation Delay
65
ns
NOTE:
6. 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.
7
FN7564.0
February 4, 2010