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| MAX1582 Datasheet, PDF (3/10 Pages) Maxim Integrated Products – High-Efficiency, 26V Step-Up Converter for White LED Main and Subdisplay Backlighting | |||
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High-Efficiency, 26V Step-Up Converter
for White LED Main and Subdisplay Backlighting
ELECTRICAL CHARACTERISTICS (continued)
(VV+ = +3.0V, VOUT1 = 20V, L1 = 22µH, COUT = 0.1µF, CCOMP = 0.022µF, RSENSE = 7.5â¦, VCTRL = +1.5V, EN1 = EN2 = V+, TA =
0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
CONDITIONS
MIN
N-CHANNEL SWITCH
LX On-Resistance
LX Leakage Current
VLX = +28V
TA = +25°C
TA = +85°C
LX Current Limit
Duty cycle = 90%
450
MAIN AND SUBDISPLAY ON/OFF SWITCHES
OUT1 to OUT2 On-Resistance EN1 = GND, EN2 = V+
OUT2 to CS On-Resistance
EN1 = V+, EN2 = GND
OUT1 to OUT2 Leakage Current
OUT2 to CS Leakage Current
EN1 = EN2 = V+, VOUT1 = 25V, VOUT2 = +9V, TA = +85°C
EN1 = EN2 = V+, VOUT2 = 12V, VCS = 0, TA = +85°C
EN1 and EN2 Logic Input Voltage
High
+2.6V < VV+ < +5.5V
1.6
TYP MAX UNITS
1.50 2.25
â¦
0.01
5
µA
0.02
650
950
mA
2.5
â¦
2.5
â¦
0.05
µA
0.05
µA
V
EN1 and EN2 Logic Input Voltage
Low
+2.6V < VV+ < +5.5V
EN1 and EN2 Input Leakage
VV+ = VEN1 = VEN2 = +5.5V
TA = +25°C
TA = +85°C
0.6
V
0.02
1
µA
0.1
ELECTRICAL CHARACTERISTICS
(VV+ = +3.0V, VOUT1 = +20V, L1 = 22µH, COUT = 0.1µF, CCOMP = 0.022µF, RSENSE = 7.5â¦, VCTRL = +1.5V, EN1 = EN2 = V+, TA =
-40°C to +85°C, unless otherwise noted.) (Notes 1, 3)
PARAMETER
Supply Voltage
Undervoltage Lockout (UVLO)
Threshold
Quiescent Current
Overvoltage Lockout (OVLO)
Threshold
OUT1 Input Bias Current
CONDITIONS
V+ rising or falling
No switching, VC = +0.25V
Rising
VOUT1 = +26V, EN1 = EN2 = V+
Output Voltage Range
(Note 2)
ERROR AMPLIFIER
CTRL to CS Regulation
CTRL Input Resistance
CS to COMP Transconductance
OSCILLATOR
Operating Frequency
VCTRL = +1.0V, VV+ = +2.6V to +5.5V
0 < VCTRL < +1.0V
VCOMP = 1.0V
MIN
2.6
2.10
26
20
(VV+ -
VDIODE)
0.093
290
32
0.75
MAX
5.5
UNITS
V
2.55
V
0.56
mA
29
V
65
µA
25.5
V
0.107
V
780
kâ¦
85
µS
1.30 MHz
_______________________________________________________________________________________ 3
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