SC643 Datasheet, PDF (3/26 Pages) Semtech Corporation – Light Management Unit with 4 LDOs and SemPulse®Interface

SC643
Absolute Maximum Ratings
Recommended Operating Conditions
IN, OUT (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0
C1+, C2+ (V) . . . . . . . . . . . . . . . . . . . . . . . -0.3 to (V + 0.3)
OUT
Pin Voltage — All Other Pins (V) . . . . . . . . . -0.3 to (V + 0.3)
IN
OUT , LDOn⁽¹⁾ Short Circuit Duration. . . . . . . . . .Continuous
ESD Protection Level⁽²⁾ (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Ambient Temperature Range (°C). . . . . . . . -40 ≤ T ≤ +85
A
Input Voltage (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.9 ≤ V ≤ 5.5
IN
Output Voltage (V). . . . . . . . . . . . . . . . . . . . . .
2.5
≤
V
OUT
≤
5.25
Voltage difference between any two LEDs (V) . . . ΔV ≤ 1.0
F
Thermal Information
Thermal Resistance, Junction to Ambient⁽³⁾ (°C/W) . . . . 35
Maximum Junction Temperature (°C) . . . . . . . . . . . . . . +150
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) subscript n = 1, 2, 3, and 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 = +25°C for Typ, -40ºC to +85°C for Min and Max, T = 125ºC, V = 3.7V, C = C = 2.2μF, C = C = 4.7μF,
A
J(MAX)
IN
1
2
IN
OUT
(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
I
Q(OFF)
Shutdown, V = 4.2V
IN
0.1
2.0
μA
Sleep (all LDOs off ), SPIF = V (2)
IN
Sleep (all LDOs on), SPIF = V (2)
IN
90
135
μA
300 450
Total Quiescent Current
I
1x mode, I = 2.5mA, I ⁽³⁾ = 0.5mA, 5 LEDs on
2.5
Q
OUT
BLn
1x mode, I = 125mA, I = 25mA, 5 LEDs on
OUT
BLn
4.3
mA
1.5x or 2x mode, I = 125mA, I = 25mA, 5 LEDs on
5.1
OUT
BLn
Charge Pump Electrical Specifications
Maximum Total Output Current
Backlight Current Setting Range
Backlight Current Accuracy
Backlight Current Matching⁽⁴⁾
1x Mode to 1.5x Mode
Falling Transition Voltage
I
OUT(MAX)
I
BL
I
BL_ACC
I
BL-BL
V
TRANS1x
Sum of all active LED currents,
V ≤ 4.2V
OUT
Nominal setting for BL1 – BL5
I = 12mA
BLn
I = 12mA
BLn
I = 50mA, I = 10mA, V = 3.2V
OUT
BLn
OUT
125
mA
0
25 mA
-8 ±1.5
8
%
-3.5 ±0.5 +3.5 %
3.22
V
1.5x Mode to 1x Mode Hysteresis
V_HYST1x
I_OUT = 50mA, I_BLn = 10mA, V_OUT = 3.2V
250
mV
3