Datasheet

ADP8860
Rev. 0 | Page 4 of 52
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
AMBIENT LIGHT SENSING
COMPARATORS
Ambient Light Sensor Current I
ALS
CMP_IN = V
D6
= 2.8 V, Bit CMP2_SEL = 1 0.70 1.08 1.33 mA
DAC Bit Step
Threshold L2 Level I
L2BIT
I
L2BIT
= I
ALS
/250 4.3 μA
Threshold L3 Level I
L3BIT
I
L3BIT
= I
ALS
/2000 0.54 μA
FAULT PROTECTION
Startup Charging Current Source I
SS
V
IN
= 3.6 V, V
OUT
= 0.8 × V
IN
2.5 3.75 5.5 mA
Output Voltage Threshold V
OUT
Exit Soft Start V
OUT(START)
V
OUT
rising 0.92 × V
IN
V
Short-Circuit Protection V
OUT(SC)
V
OUT
falling 0.55 × V
IN
V
Output Overvoltage Protection V
OVP
Activation Level 5.8 V
OVP Recovery Hysteresis 500 mV
Thermal Shutdown
Threshold TSD 150 °C
Hysteresis TSD
(HYS)
20 °C
Isolation from Input to Output
During Fault
I
OUTLKG
V
IN
= 5.5 V, V
OUT
= 0 V, Bit nSTBY = 0 1.5 μA
Time to Validate a Fault t
FAU LT
2 μs
I
2
C INTERFACE
V
DDIO
Voltage Operating Range V
DDIO
5.5 V
Logic Low Input
2
V
IL
V
IN
= 3.6 V 0.6 V
Logic High Input
3
V
IH
V
IN
= 3.6 V 1.30 V
I
2
C TIMING SPECIFICATIONS Guaranteed by design
Delay from Reset Deassertion to
I
2
C access
t
RESET
20 μs
SCL Clock Frequency f
SCL
400 KHz
SCL High Time t
HIGH
0.6 μs
SCL Low Time t
LOW
1.3 μs
Setup Time
Data t
SU, DAT
100 ns
Repeated Start t
SU, STA
0.6 μs
Stop Condition t
SU, STO
0.6 μs
Hold Time
Data t
HD, DAT
0 0.9 μs
Start/Repeated Start t
HD, STA
0.6 μs
Bus Free Time (Stop and Start
Conditions)
t
BUF
1.3 μs
Rise Time (SCL and SDA) t
R
20 + 0.1 C
B
300 ns
Fall Time (SCL and SDA) t
F
20 + 0.1 C
B
300 ns
Pulse Width of Suppressed Spike t
SP
0 50 ns
Capacitive Load Per Bus Line C
B
400 pF
1
Current source matching is calculated by dividing the difference between the maximum and minimum current from the sum of the maximum and minimum.
2
V
IL
is a function of the input voltage. See in the section for typical values over operating ranges. Figure 16
Figure 16
Typical Performance Characteristics
Typical Performance Characteristics
3
V
IH
is a function of the input voltage. See in the section for typical values over operating ranges.