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SC668
LDOn Short Circuit Duration . . . . . . . . . . . . . . .Continuous
ESD Protection Level (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5
AbsoluteMaximumRatings
Pin Voltage — IN (V) . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0
Pin Voltage — All Other Pins (V) . . . . . . . . . -0.3 to (V IN + 0.3)
(1)
(2)
Recommended Operating Conditions
Ambient Temperature Range (°C) . . . . . . . . . -40 ≤ T A ≤ +85
Input Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . 2.9 ≤ V IN ≤ 5.5
Backlight Sink Voltage (V) . . . . . . . . . . . . . . . 0.05 ≤ V IN ≤ 4.2
Thermal Information
Thermal Resistance, Junction to Ambient (3) (°C/W) . . . . 35
Storage Temperature Range (°C) . . . . . . . . . . . . -65 to +150
Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . . +260
Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters
specified in the Electrical Characteristics section is not recommended.
NOTES:
(1) Subscripting for all LDOs (LDOn), n = 1, 2, 3, 4.
(2) Tested according to JEDEC standard JESD22-A114-B.
(3) Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
Electrical Characteristics
Unless otherwise noted, T A = +25°C for Typ, -40oC to +85°C for Min and Max, T J(MAX) = 125oC, V IN = 3.7V, C IN = C LDO1 = C LDO2 = C LDO3 = C LDO4 = 1.0μF,
C BYP = 22nF, (ESR = 0.03Ω) (1)
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Supply Specifications
Input Supply Voltage
V IN
2.9
5.5
V
Shutdown Current
Total Quiescent Current
I Q(OFF)
I Q
Shutdown, V IN = 4.2V
Sleep (all LDOs off ), EN = V IN(2)
Sleep (all LDOs on), EN = V IN (2)
0.1
90
300
2.0
135
450
μA
μA
LED Sink Electrical Specifications
8 LEDs on
1.5
Maximum Total Backlight Current
I OUT(MAX)
Sum of all active LED currents, V IN above dropout level
200
mA
Backlight Current Setting Range
Backlight Current Accuracy
I BL
I BL_ACC
Nominal setting for BL1 – BL8
I BLn(3) = 12mA
0
±1.5
25
mA
%
Backlight Current Matching (4)
Dropout Voltage (5)
Current Sink Off-State Leakage Current
I BL-BL
V DO
I BL/FL(OFF)
I BLn(3) = 12mA
One bank of 6 backlights set equal to 20mA
V IN = V BLn(3) = 4.2V
-3.5
±0.5
59
0.1
+3.5
1
%
mV
μA
3
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