White LED Step-Up Converter in SOT23
DC ELECTRICAL CHARACTERISTICS (continued)
(V+ = 3V, V OUT = 11V, L = 33μH, C OUT = 1μF, C COMP = 0.15μF, R SENSE = 5 Ω , V CTRL = 1V, T A = 0 ° C to +85 ° C , unless otherwise
noted. Typical values are at T A = +25 ° C.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
N-CHANNEL SWITCH
LX On-Resistance
I LX = 100mA
1.4
2.2
Ω
LX Leakage Current
LX Current Limit
V OUT = V LX = 13V
Duty cycle = 65%
T A = +25 ° C
T A = +85 ° C
300
0.01
0.05
500
2
750
μA
mA
DC ELECTRICAL CHARACTERISTICS
(V+ = 3V, V OUT = 11V, L = 33μH, C OUT = 1μF, C COMP = 0.15μF, R SENSE = 5 Ω , V CTRL = 1V, T A = -40 ° C to +85 ° C , unless otherwise
noted. (Note 1)
PARAMETER
Supply Voltage
Undervoltage Lockout Threshold
Quiescent Current
Overvoltage Threshold
CONDITIONS
V+ rising, 40mV hysteresis typical
V+ falling
Not switching, V CTRL = V CS = V+
Switching, V CTRL = V+, V CS = GND
V+ rising, 1V hysteresis typical
V+ falling
MIN
2.6
2.15
2.10
12.25
11.25
MAX
5.5
2.59
2.56
0.4
2
14.00
13.25
UNITS
V
V
mA
V
OUT Input Bias Current
Output Voltage Range
V OUT = 13V
V CTRL > 0.25V
V CTRL = GND
10
V+ -
V DIODE
30
1
12.25
μA
V
ERROR AMPLIFIER
CTRL to CS Regulation
V CTRL = 2V, V+ = 2.6V to 5.5V
65
85
mV/V
CS Input Bias Current
CTRL Input Resistance
V CS = V CTRL /13.33
450
1
1100
μA
k Ω
CTRL Dual Mode Threshold
COMP Pin Resistance to Ground
COMP Output Voltage Swing
Hysteresis = 25mV typical
Device in shutdown or overvoltage
100
7.5
0.3
240
50.0
2.4
mV
k Ω
V
OSCILLATOR
Operating Frequency
0.9
1.6
MHz
Maximum Duty Cycle
V CTRL = V+, V CS = GND
85
97
%
N-CHANNEL SWITCH
LX On-Resistance
I LX = 100mA
2.2
Ω
LX Current Limit
Duty cycle = 65%
225
850
mA
Note 1: Limits are 100% production tested at T A = +25°C. Limits over the operating temperature range are guaranteed through cor-
relation using statistical quality control (SQC) methods.
_______________________________________________________________________________________
3
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