MAX158 Maxim, MAX158 Datasheet - Page 2

• Manufacturer Part Number: MAX158
• Description: High-Efficiency / 26V Step-Up Converter for White LED Main and Subdisplay Backlighting
• Manufacturer: Maxim

ABSOLUTE MAXIMUM RATINGS
V+, VP, CTRL to GND............................................-0.3V to +6.0V
PGND to GND .......................................................-0.3V to +0.3V
LX, OUT1 to GND ...................................................-0.3V to +30V
OUT2 to GND .........................................................-0.3V to +14V
COMP, CS, EN1, EN2 to GND ....................-0.3V to (V
I
High-Efficiency, 26V Step-Up Converter
for White LED Main and Subdisplay Backlighting
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
0°C to +85°C, unless otherwise noted. Typical values are at T
2
LX ....................................................................................................
Supply Voltage
Undervoltage Lockout (UVLO)
Threshold
UVLO Hysteresis
Quiescent Current
Shutdown Supply Current
Overvoltage Lockout (OVLO)
Threshold
OVLO Hysteresis
OUT1 Input Bias Current
Output Voltage Range
ERROR AMPLIFIER
CTRL to CS Regulation
CS Input Bias Current
CTRL Input Resistance
CS to COMP Transconductance
OSCILLATOR
Operating Frequency
Minimum Duty Cycle
Maximum Duty Cycle
V+
_______________________________________________________________________________________
= +3.0V, V
PARAMETER
OUT1
= 20V, L1 = 22µH, C
V+ rising or falling
No switching, V
EN1 = EN2 = GND, OUT1 = V+
V
OUT1 = V+, EN1 = EN2 = GND
(Note 2)
V
V
0 < V
V
PWM mode
Pulse skipping
CTRL = V+, CS = GND
OUT1
CTRL
CS
COMP
= V
CTRL
OUT
= +1.0V, V
= +26V, EN1 = EN2 = V+
= +1.0V
CTRL
< +1V
= 0.1µF, C
/ 10
CTRL
V+
V+
+ 0.3V)
1A
= +2.6V to +5.5V
= V
CONDITIONS
COMP
RMS
CS
A
= +25°C.) (Note 1)
= +0.25V
= 0.022µF, R
Continuous Power Dissipation (T
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
12-Pin Thin QFN (derate 16.9mW/°C above +70°C) ....1349mW
16-Pin UCSP (derate 6.5mW/°C above +70°C)..............518mW
SENSE
T
T
T
T
T
T
A
A
A
A
A
A
= +25°C
= +85°C
= +25°C
= +85°C
= +25°C
= +85°C
= 7.5Ω, V
CTRL
V
(V
DIODE
0.095
2.10
0.80
MIN
290
2.6
26
20
32
91
V+
= +1.5V, EN1 = EN2 = V+, T
A
-
)
= +70°C)
0.100
TYP
2.38
0.40
0.01
0.01
0.05
0.01
500
0.1
1.0
40
27
40
50
12
94
2
1
0
0.106
MAX
2.55
0.56
25.5
1.25
780
5.5
29
65
82
1
1
1
UNITS
MHz
mV
mA
µA
µA
µA
kΩ
µS
%
%
V
V
V
V
V
V
A
=