Rainbow Electronics MAX8982X - Manual (Page 9)

Power-Management ICs for
ICERA E400/E450 Platform
MAX8982A/MAX8982X
9
GENERAL ELECTRICAL CHARACTERISTICS (continued)
(MAX8982A: V IN1A = V IN1B = +5.0V and C OUT1,2,3+CIN_ = 1000FF, MAX8982X: V IN1A = V IN1B = +3.3V and CO UT1,2,3+CIN_ = 20FF,
C
REFBP
= 0.1FF, T
A = -40NC to +85NC. Typical values are at T A
= +25NC, unless otherwise noted.) (Note 3)
BUCK1 ELECTRICAL CHARACTERISTICS
(MAX8982A: V IN1A = V IN1B = +5.0V and C OUT1,2,3+CIN_ = 1000µF, MAX8982X: V IN1A = V IN1B = +3.3V and C OUT1,2,3+CIN_ = 20µF,
C REFBP = 0.1µF, C OUT = 10µF, L = 2.2µH, T A = -40NC to +85NC, unless otherwise noted. Typical values are at T A = +25NC.) (Note 3)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Maximum Pulse Width of Spikes
that Must be Suppressed by the
Input Filter of Both SDA and SCL
Signals
50 ns
Setup Time for STOP Condition
(t
SU_STO
)
0.6 F s
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Current (Note 4) No load, no switching 65 F A
Default Output Voltage I LOAD = 100mA 0.873 0.9 0.927 V
Output Voltage Accuracy
I
LOAD
= 100mA, V
BUCK1
tested at 0.6V, 0.775V, 1V,
1.2V in production (0.6V to 1.2V in 25mV steps)
-3 +3 %
Maximum Output Current V BUCK1 = 0.9V, T A = +25NC 1200 mA
Current Limit
pFET switch 1400 1800 2500
mA
nFET rectifier 1000 1400 1900
On-Resistance
pFET switch, I LX1 = -150mA 0.3
I
nFET rectifier, I LX1 = 150mA 0.15
Ramp-Up/Down Rate Control Same for both up and down
RASD1[0:1] = 00 5
mV/
F s
RASD1[0:1] = 01 10
RASD1[0:1] = 10
12.5
(default)
RASD1[0:1] = 11 25
Rectifier Off Current Threshold 40 mA
Minimum On-Time t ON 40 ns
Minimum Off-Time t OFF 40 ns
Efficiency (Note 4) V BUCK1 = 0.9V, I LOAD = 400mA 85 %
Shutdown Output Resistance
(Active Discharge Resistance)
I 2 C programmable, default OFF 1 kI
Output Load Regulation Equal to inductor DC resistance divided by 4 R L /4 V/A