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NCP5021
Table 4. ANALOG SECTION: (Typical values are referenced to Ta = +25 ° C, Min & Max values are referenced ? 40 ° C to +85 ° C ambient
temperature, unless otherwise noted), operating conditions 2.85 V < Vbat < 5.5 V, unless otherwise noted.
Pin
7
6
Symbol
I REF
I PK
Rating
Reference Current @ Vref = 1144 mV (Note 6)
Reference Current @ Vref = 1144 mV (Note 6)
Min
1.0
1.0
Typ
Max
100
100
Unit
m A
m A
k ref
k pk
Reference Current to ILED Peak Current Ratio
Reference Current to Inductor Peak Current Ratio
250
9700
7
6
9
9
4
V REF
V REFK
V FB
M DCY
I LKGM
F LF
V VSD
Reference Voltage (Note 6)
Reference Voltage (Note 6)
Feedback Voltage (Note 7)
Boost Operating Maximum Duty Cycle
Current Mirror Leakage Current
Low Frequency Clock derived from the internal 1.3 MHz clock (Note 9)
Photo Sense Bias Supply @ Ibias = 1 mA
? 3%
? 10%
90.5
0.6
2.5
1144
1144
425
94
+3%
+10%
200
20
Vbat
mV
mV
mV
%
nA
Hz
V
4
4
5
R VSD
I SDUSD
G AMB0.25
G AMB0.50
G AMB01
G AMB02
G AMB04
V iph
Photo Sense Bias Supply internal impedance
Photo Sense Leakage Current (Note 9)
Photo Sense Internal Gain 1/4
Photo Sense Internal Gain 1/2
Photo Sense Internal Gain 1
Photo Sense Internal Gain 2
Photo Sense Internal Gain 4
Photo Sense Input Voltage (Note 10)
30
0.25
0.5
1
2
4
100
1.5
W
nA
V
6. The external circuit must not force the I REF or I PK pin voltage either higher or lower than the 1144 mV specified. The reference voltage applies
to both IREF and IPK pins.
7. The overall output current tolerance depends upon the accuracy of the external resistor. Using 1% or better resistor is recommended.
8. This parameter guarantees the function for production test purposes.
9. Guaranteed by design and characterized.
10. The ambient sense linearity is guaranteed when the voltage at the output of the internal amplifier is limited to 1.5 V. This voltage is equal to the
input voltage times the programmed gain. Beyond this value, the operational amplifier is in the saturation region and the linearity is no longer
guaranteed.
Table 5. DIGITAL PARAMETERS SECTION (Typical values are referenced to Ta = +25 ° C, Min & Max values are referenced ? 40 ° C
to +85 ° C ambient temperature, unless otherwise noted), operating conditions 2.85 V < Vbat < 5.5 V, unless otherwise noted. (Note 11)
Symbol
F SCK
Rating
InputI2C Clock Frequency (Note 9)
Min
Typ
Max
400
Unit
kHz
V IH
V IL
C IN
V IHD
V ILD
Positive going Input High Voltage Threshold, SCL,
SDA signals
Negative going Input High Voltage Threshold, SCL,
SDA signals
SDA Input Capacitance (Note 9)
I2C Address Extension
I2C Address Extension
1.6
0
Vbat * 0.7
0
10
V BAT
0.4
15
Vbat + 0.3 V
0.3
V
V
pF
V
V
11. Digital inputs undershoot < ? 0.30 V to ground, Digital inputs overshoot < 0.30 V to V BAT
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