MAX1620 Datasheet, PDF (2/20 Pages) Maxim Integrated Products – Digitally Adjustable LCD Bias Supplies

Digitally Adjustable LCD Bias Supplies
ABSOLUTE MAXIMUM RATINGS
V_DD to AGND ..............................................................-0.3V to 6V
PGND to AGND ..................................................................±0.3V
BATT, LX, LCDON to AGND ....................................-0.3V to 30V
DHI, DLO to PGND.....................................-0.3V to (V_DD + 0.3V)
DOUT, FB, POL, POK, REF to AGND.........-0.3V to (V_DD + 0.3V)
UP, DN, SHDN to AGND.............................................-0.3V to 6V
SCL, SDA, SUS to AGND............................................-0.3V to 6V
I_DHI ......................................................................................60mA
I_DLO....................................................................................-30mA
I_LCDON ...............................................................................-10mA
Continuous Power Dissipation (T_A = +70°C)
QSOP (derate 8.3mW/°C above +70°C) ......................667mW
Operating Temperature Range
MAX1620EEE/MAX1621EEE ............................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
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_DD = 3.3V, V_BATT = 10V, T_A = 0°C to +85°C, unless otherwise noted.)
PARAMETER
CONDITIONS
SWITCHING REGULATOR
V_DD Operating Range
V_DD Supply Current
Positive Output Voltage
Operating mode, output in regulation, V_DD = 5.5V
Shutdown mode, V _SHDN = V_DD, V_DD = 5.5V
Negative Output Voltage
Undervoltage Lockout Threshold (Note 1)
BATT Input Current
BATT = 12V, operating mode
BATT = 12V, shutdown mode
LX Input Current
LX = 12V, operating mode
LX = 12V, shutdown mode
BATT Operating Range (Note 2)
Microsecond-Volt Time Constant (k-factor)
On-Resistance (DLO, DHI)
DHI Output Current (Note 3)
DLO Output Current (Note 3)
FB Regulation Voltage
FB Input Current (Note 3)
LCDON Low, Sinking Current
LCDON High, Leakage Current
POK Threshold Voltage
POK Hysteresis
1.8V ≤ BATT ≤ 20V, T_A = +25°C
4V ≤ BATT ≤ 12V, T_A = 0°C to +85°C
V_DD = 4.5V
V_DD = 3.0V
V_DD = 5V
V_DD = 5V
POL = V_DD, 3.0V ≤ V_DD ≤ 5.5V
POL = AGND, 3.0V ≤ V_DD ≤ 5.5V
FB = REF + 100mV
FB = -50mV
V LCDON = 0.4V, POK = 1.017V
V LCDON = 28V, POK = 0.967V
Voltage on POK rising
REFERENCE AND DAC OUTPUT
REF Voltage
REF Load Regulation
No load
0µA ≤ I_REF ≤ 25mA
MIN
3.0
1.5
1.8
16.5
1.46
-8
-20
-10
-2
0.967
1.47
TYP
150
9
13
13
20
7
14
50
-25
1.5
0
-6
0.992
12
1.5
3
MAX UNITS
5.5
250
20
27
-27
2.8
20
1
20
1
20
23.5
1.53
8
10
85
1
1.017
V
µA
V
V
V
µA
µA
V
µs-V
Ω
mA
mA
V
mV
nA
mA
µA
V
mV
1.53
V
10
mV
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