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| MAX1606 Datasheet, PDF (3/10 Pages) Maxim Integrated Products – 28V Internal Switch LCD Bias Supply with True Shutdown | |||
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28V Internal Switch LCD Bias Supply
with True Shutdown
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 3.3V, VCC = BATT = SHDN, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONTROL INPUTS (SHDN, LIM)
CONDITIONS
MIN TYP MAX UNITS
SHDN Input Threshold
SHDN Input Bias Current
LIM Input Low Level
LIM Input Float Level
VIH
2.4V ⤠VCC ⤠5.5V
VIL
ISHDN
2.4V ⤠VCC ⤠5.5V
VCC = 5.5V, V SHDN = 0 to 5.5V
2.4V ⤠VCC ⤠5.5V
2.4V ⤠VCC ⤠5.5V,
ILIM = ±0.5µA
0.8 Ã
VCC
-1
(VCC / 2)
- 0.25V
V
0.2 Ã
VCC
1
µA
0.4
V
(VCC / 2)
+ 0.25V
V
LIM Input High Level
2.4V ⤠VCC ⤠5.5V
VCC
- 0.4V
V
LIM Input Bias Current
ILIM
SHDN = VCC, LIM = GND or VCC
SHDN = GND
-2
2
µA
0.1
1
PMOS ISOLATION SWITCH (BATT to SW)
PMOS Current Limit
PMOS On-Resistance
VCC = 2.5V, VBATT = 1.5V
0.65 0.85 1.5
A
RDS(ON) VCC = 2.5V, VBATT = 1.5V, ISW = 100mA
0.25 0.4
â¦
Soft-Start Time
tSS
VCC = 2.5V, VBATT = 1.5V,
RSW = 50⦠to GND
0.3
ms
ELECTRICAL CHARACTERISTICS
(VCC = 3.3V, VCC = BATT = SHDN, TA = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
VCC Supply Voltage
VCC
BATT Input Voltage Range
VBATT
VCC Undervoltage Lockout
VUVLO
VCC Quiescent Supply Current
ICC
VCC Shutdown Supply Current
BATT Input Supply Current
IBATT
BATT Shutdown Supply Current
Feedback Set Point
VFB
Feedback Input Bias Current
IFB
INDUCTOR CONNECTIONS (LX, SW)
LX Voltage Range
VLX
LX Switch Current Limit
ILX(MAX)
LX On-Resistance
RLX
LX Leakage Current
Maximum LX On-Time
tON
CONDITIONS
(Note 1)
(Note 1)
VCC falling, 30mV typical hysteresis
VFB = 1.3V
SHDN = GND
VFB = 1.3V
SHDN = GND
VFB = 1.3V
LIM = VCC
LIM = floating
LIM = GND
VCC = 3.3V, ILX = 100mA
VLX = 28V
MIN TYP MAX UNITS
2.4
5.5
V
0.8
5.5
V
2.0
2.37
V
360
µA
1
µA
40
µA
1
µA
1.215
1.285
V
100
nA
28
V
0.35
0.58
0.18
0.30
A
0.08
0.17
2
â¦
2
µA
9
17
µs
_______________________________________________________________________________________ 3
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