ACT88320QI-T
Rev 2.0, 20-Dec-2017
INTERNAL STEP-DOWN DC/DC ELECTRICAL CHARACTERISTICS REGULATOR: (BUCK1)
(VIN = 5V, TA = 25°C, unless otherwise specified.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
Input Operating Voltage Range
2.7
0.6
5.5
4.0
V
V
Output Voltage Programming Range
See CMI section for programming details
Standby Supply Current, Low Power Mode
Enabled
VOUT_B1 = 103% setpoint, Enabled, VOUT_B1
setpoint = 1.0V, No Load
40
55
1
µA
µA
Shutdown Current
Regulator Disabled
VOUT_B1 = default CMI voltage, continuous
PWM mode
Output Voltage Accuracy
Output Voltage Accuracy
Line Regulation
-1
-2
VNOM
VNOM
0.1
1
2
%
%
VOUT_B1 = default CMI voltage, PFM mode
VOUT_B1 = default CMI voltage, PWM Reg-
ulation
%/V
Load Regulation
VOUT_B1 = at default CM, PWM Regulation
VOUT_B1 Rising
0.1
92.5
3
%/A
Power Good Threshold
Power Good Hysteresis
Overvoltage Fault Threshold
Overvoltage Fault Hysteresis
90
95
%VNOM
%VNOM
%VNOM
%VNOM
VOUT_B1 Falling
VOUT_B1 Rising
107.5
110
3
112.5
VOUT_B1 Falling
1.125 /
2.25
Switching Frequency
VOUT_B1 ≥ 20% of VNOM, Configurable
10% to 90% VNOM
-5%
+5%
MHz
Soft-Start Period Tset
480
4.6
600
µs
A
Current Limit, Cycle-by-Cycle
4.14
5.06
% compared to Current Limit, cycle-by-
cycle
Current Limit, Shutdown
Current Limit, Warning
112.5
122.5
75
132.5
82.5
%
%
% compared to Current Limit, cycle-by-
cycle
67.5
PMOS On-Resistance
NMOS On-Resistance
ISW = -1A, VIN = 5.0V
ISW = 1A, VIN = 5.0V
VIN = 5.5V, VSW = 0V
VIN = 5.5V, VSW = 5.5V
40
16
50
25
1
mΩ
mΩ
µA
SW Leakage Current
1
µA
Dynamic Voltage Scaling Rate
Output Pull Down Resistance
3.50
4.4
mV/µs
Ohms
Enabled when regulator disabled
8.75
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11
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