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MAX1848 Fiches technique(PDF) 3 Page - Maxim Integrated Products

No de pièce MAX1848
Description  White LED Step-Up Converter in SOT23
Download  9 Pages
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Fabricant  MAXIM [Maxim Integrated Products]
Site Internet  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1848 Fiches technique(HTML) 3 Page - Maxim Integrated Products

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


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