Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
IN
= V
EN1
= V
EN2
= 3.6V, C
IN
= C1 = C2 = C
OUT
= 1µF, T
A
= -40°C to +85°C. Typical values are at T
A
= +25°C, unless otherwise
noted.) (Note 1)
PARAMETER
IN Operating Voltage
Undervoltage Lockout Threshold
Supply Current
Shutdown Supply Current
Soft-Start Completion Time
SET Bias Voltage
SET Leakage in Shutdown
SET Current Range
EN1 = EN2 = IN
SET to LED_ Current Ratio (I
LED
/I
SET
)
LED_ Current Accuracy
LED_ Current Matching
Maximum LED_ Sink Current
LED_ Dropout Voltage
LED_ Minimum Regulation Voltage (1.5x Mode)
LED Leakage in Shutdown
Maximum OUT Current
Open-Loop OUT Resistance
Switching Frequency
EN1, EN2 Logic High Voltage
EN1, EN2 Logic Low Voltage
EN1, EN2 Input Current
Thermal-Shutdown Threshold
V
IN
= 2.7V to 5.5V
V
IN
= 2.7V to 5.5V
V
EN
_ = GND or 5.5V, T
A
= +25°C
20°C hysteresis
0.01
160
1.6
0.4
1
I
SET
= 60µA
EN1 = IN, EN2 = GND
EN1 = GND, EN2 = IN
EN1 = EN2 = IN, R
SET
= 4.64kΩ, T
A
= 0°C to +85°C
I
SET
= 130µA, T
A
= 0°C to +85°C (Note 2)
I
SET
= 130µA, EN1 = EN2 = IN
I
SET
= 87µA (Note 3)
EN1 = EN2 = IN, I
SET
= 87µA
EN1 = EN2 = GND, V
LED
= 5.5V, T
A
= +25°C
V
IN
≥
3.4V, V
OUT
≥
3.9V, EN1 = EN2 = IN
1x mode (1 x V
IN
- V
OUT
) / I
OUT
1.5x mode (1.5 x V
IN
- V
OUT
) / I
OUT
1
120
1.5
10
100
25.9
EN1 = EN2 = GND, T
A
= +25°C
40
190
58
19.5
219
66
22
±0.6
±0.2
28
40
150
0.01
80
200
1
0.570
V
IN
rising or falling, 35mV hysteresis
Switching, no load, I
SET
= 130µA
EN1 = EN2 = OUT = GND, T
A
= +25°C
CONDITIONS
MIN
2.7
2.25
2.45
2
0.1
2.1
0.6
0.01
0.630
1
130
245
74
25.0
%
%
mA
mV
mV
µA
mA
Ω
MHz
V
V
µA
°C
A/A
TYP
MAX
5.5
2.60
4
10
UNITS
V
V
mA
µA
ms
V
µA
µA
Note 1:
Specifications to -40°C are guaranteed by design and not production tested.
Note 2:
LED_ current matching is defined as: (I
LED
- I
AVG
) / I
AVG
.
Note 3:
Dropout voltage is defined as the LED_ to GND voltage at which the LED_ current drops 10% from the value at V
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Analogue and Mixed Signal
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