Rainbow Electronics MAX8645Y - Manual (Page 3)

MAX8645X/MAX8645Y
1x/1.5x/2x White LED Charge Pumps with Two
LDOs in 4mm x 4mm TQFN
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ELECTRICAL CHARACTERISTICS (continued)
(V IN = 3.6V, V GND = V PGND = 0V, ENM1 = ENM2 = ENF = IN, R SETM = R SETF = 6.8k Ω, P1 = P2 = unconnected, C
REF = 0.01µF,
T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
1x to 1.5x or 1.5x to 2x Mode
Transition Threshold
90 100 110 mV
Input Voltage-Mode Transition
Hysteresis
150 mV
Charge-Pump Maximum OUT
Current
V IN
≥ 3.15V, V
OUT = 3.9V 580 mA
1x mode (V IN - V OUT ) / I OUT 0.3 1.0
1.5x mode (1.5V IN - V OUT ) / I OUT 1.1 4.0 Open-Loop OUT Resistance
2x mode (2V IN - V OUT ) / I OUT 1.5 4.14
Ω
Charge-Pump Short-Circuit
Current
V OUT < 1.25V 500 mA
Switching Frequency 1 MHz
OUT Pulldown Resistance in
Shutdown
ENM_ = ENF = GND 5 k Ω
LED DRIVER
SET_ Bias Voltage T A = +25°C 0.6 V
T A = +25°C 0.01 1
SET_ Leakage in Shutdown ENM_ = ENF = GND
T A = +85°C 0.1
µA
SET_ Current Range 10 145 µA
SETM-to-Main LED Current Ratio
(I
M_
/I
SETM
)
100% setting, M1–M6 230 A/A
SETF-to-Flash LED Current Ratio
(I
F_ /I SETF )
100% setting, F1 and F2 1380 A/A
T A = +25°C -1.25 +1.25
M_, F_ Current Accuracy
T A = -40°C to current derating start temperature -4 +4
%
Maximum Main LED Sink Current R SETM = 4.6k Ω, for each M_ 30 mA
Maximum Flash LED Sink Current R SETF = 4.12k Ω, I
F1 + I F2 400 mA
Current-Derating-Function Start
Temperature
+40 °C
Current-Derating-Function Slope T A = +40°C to +85°C -1.7 %/°C
Dropout Voltage (Note 2) 40 90 mV
1.5x and 2x Regulation Voltage 150 mV
T A = +25°C 0.01 2
M_, F_ Leakage in Shutdown ENM_ = ENF = GND
T
A
= +85°C 0.1
µA
LDO_
Output Voltage Accuracy I LDO_ = 150mA, relative to V OUT(NOM) (Note 3) -1.7 0 +1.7 %
Output Current Range 0 200 mA
Current Limit V LDO_ = 0V 280 475 750 mA
Soft-Start Current Limit 160 mA