ACT88320QI-T
Rev 2.0, 20-Dec-2017
INTERNAL STEP-DOWN DC/DC ELECTRICAL CHARACTERISTICS REGULATOR: (BUCK2-3)
(AVIN = VIN = 5V, TA = 25°C, unless otherwise specified.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
Input Operating Voltage Range
2.7
0.8
5.5
V
V
Output Voltage Programming Range
Configurable in 12.5mV steps.
3.9875
Standby Supply Current, Low Power
Mode Enabled
VOUTx = 103%, Regulator Enabled, No load, VOUTx
default CMI voltage
=
35
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%
600
MHz
Soft-Start Period Tset
Startup Time
10% to 90% VNOM
480
700
3.0
µs
µs
Time from Enable to PG
Current Limit, Cycle-by-Cycle
Current Limit, Shutdown
Current Limit, Warning
PMOS On-Resistance
NMOS On-Resistance
2.7
112.5
67.5
3.3
132.5
82.5
A
% compared to Current Limit, cycle-by-cycle
% compared to Current Limit, cycle-by-cycle
ISW_Bx = -500mA, VIN = 5V
122.5
75
%
%
80
mΩ
mΩ
µA
µA
mV/us
Ω
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
Dynamic Voltage Scaling Rate
Output Pull Down Resistance
3.50
9.4
Enabled when regulator disabled
20
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13
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