XR77128 Datasheet, PDF (6/28 Pages) Exar Corporation – Quad Output Digital PWM/PFM

Symbol
Parameter
Conditions
Output Fall Time from V_IHmin to V_IL-
max
Internal Pin Capacitance
Gate Drivers
GH, GL Rise Time
GH, GL Fall Time
GH, GL Pull-Up On-State Output
Resistance
GH, GL Pull-Down On-State Output
Resistance
GH, GL Pull-Down Off-Mode Resis-
tance
Bootstrap Diode Forward Resistance
Minimum On-Time
Minimum Off-Time
Minimum Programmable Dead Time
Maximum Programmable Dead Time
Programmable Dead Time Adjust-
ment Step
With a bus capacitance (C_b) from 10pF to
400pF
At 10-90% of full scale, 1nF Cload
At 10-90% of full scale, 1nF Cload
VCC = VCCD = 0V
at 10mA
1nF of gate capacitance
1nF of gate capacitance
Does not include dead time variation from
driver output stage, T_SW = switching
period
103MHz internal clock frequency
Note 1: Fine Set Point Resolution not available in PFM
Note 2: 3.3V CMOS logic compatible, 5V tolerant
Note 3: 3.3V/5.0V CMOS logic compatible, maximum rating of 15.0V
XR77128
Min
Typ
Max
20 +
250
0.1C_b
1
Units
ns
pF
17
ns
11
ns
4.35
5
Ω
1.96
2.5
Ω
48
kΩ
8.5
Ω
50
ns
125
ns
20
ns
T_SW
607
ps
© 2014 Exar Corporation
6 / 28
exar.com/XR77128
Rev 1A