ACT88326VA
Rev 1.0, 29-May-2018
INTERNAL STEP-DOWN DC/DC ELECTRICAL CHARACTERISTICS REGULATOR: (BUCK2/3)
(AVIN = VIN = 5V, TA = 25°C, unless otherwise specified.)
PARAMETER
CONDITIONS
MIN
2.7
TYP
MAX
5.5
UNIT
V
Input Operating Voltage Range
Buck2 Output Voltage Programming
Range 1
See CMI section for programming details
See CMI section for programming details
See CMI section for programming details
0.6
3.0
V
Buck2 Output Voltage Programming
Range 2
0.8
0.8
4.0
4.0
V
V
Buck3 Output Voltage Programming
Range
Standby Supply Current, Low Power
Mode Enabled
VOUTx = 103%, Regulator Enabled, No load, VOUTx
default CMI voltage
=
40
0.1
µA
µA
V
Shutdown Current
VIN = 5.0V, Regulator Disabled
1
VOUTx = default CMI voltage, IOUTx = 1A (continuous
PWM mode)
Output Voltage Accuracy
-1%
VNOM
1%
Line Regulation
VOUTx = default CMI voltage, PWM Regulation
0.1
0.1
92.5
3
%
Load Regulation
VOUTx = default CMI voltage, PWM Regulation
%
Power Good Threshold
Power Good Hysteresis
Overvoltage Fault Threshold
Overvoltage Fault Hysteresis
VOUTx Rising
VOUTx Falling
VOUTx Rising
VOUTx Falling
90
95
%VNOM
%VNOM
%VNOM
%VNOM
107.5
110
3
112.5
1.125 /
2.25
Switching Frequency
VOUTx ≥ 20% of VNOM
-5%
+5%
750
MHz
Soft-Start Period Tset
Startup Time
10% to 90% VNOM
480
700
µs
µs
Time from Enable to PG
ILIM[1:0] = 00
ILIM[1:0] = 01
ILIM[1:0] = 10
ILIM[1:0] = 11
3.7
3.1
2.6
2.2
4.6
3.9
3.2
2.6
5.4
4.5
3.8
3.1
Current Limit, Cycle-by-Cycle
(accuracy is only valid for the specific
CMI’s default setting)
A
Current Limit, Shutdown
Current Limit, Warning
PMOS On-Resistance
NMOS On-Resistance
% compared to Current Limit, cycle-by-cycle
% compared to Current Limit, cycle-by-cycle
ISW_Bx = -500mA, VIN = 5V
112.5
67.5
122.5
75
132.5
82.5
%
%
80
mΩ
mΩ
µA
ISW_Bx = 500mA, VIN = 5V
50
VIN = 5.5V, VSW_Bx = 0 or 0V
1
1
SW Leakage Current
VIN = 5.5V, VSW_Bx = 0 or 5.5V
µA
Dynamic Voltage Scaling Rate
Output Pull Down Resistance
3.50
9.4
mV/us
Ω
Enabled when regulator disabled
20
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12
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