Rainbow Electronics MAX1621 - Manual (Page 4)

MAX1620/MAX1621
Digitally Adjustable LCD Bias Supplies
4 _______________________________________________________________________________________
Operating mode, output in regulation
µA
150 250
0µA
≤
I REF
≤
25µA
No load
REF Load Regulation
Voltage on POK rising
V
POL = V DD , 3.0V
≤
V DD
≤
5.5V
FB = 0V - 50mV
3.0 5.5
4V ≤ BATT
≤
12V
V DD Operating Range
FB = REF + 100mV
POL = AGND, 3.0V ≤ V
DD
≤ 5.5V
mV 5 10
V 1.44 1.5 1.56 REF Voltage
V 27 Positive Output Voltage
0.957 0.992 1.027
Shutdown mode, V SHDN = V DD 20
-10 120
FB Input Current (Note 3)
V
DD
Supply Current
V
-30 10
mV -10 0 10
V 1.5 2.8 Undervoltage Lockout Threshold (Note 1)
nA
1.44 1.5 1.56
µs-V Microsecond-Volt Time Constant (k-factor) 16 24
V 1.8 20 BATT Operating Range (Note 2)
-27 Negative Output Voltage
FB Regulation Voltage
V
POK Threshold Voltage
DOUT Maximum Output Voltage (Note 3) V
REF - REF +
0.02 0.02
0µA
≤
I DOUT
≤
40µA
-20µA
≤
I DOUT
≤
0µA DOUT Minimum Output Voltage (Note 3) V 0 0.01
Guaranteed monotonic DOUT Differential Nonlinearity LSB ± 1
UP, DN, SHDN, POL Input High Voltage
3.0V ≤ V
DD
≤ 3.6V 1.4
V DD = 5.5V 2.3
V
UP, DN, SHDN, POL Input Low Voltage 0.6 V
3.0V ≤ V DD
≤ 3.6V 1.4
V DD = 5.5V 2.3
SCL, SDA, SUS Input Low Voltage 0.6 V
SDA Output Low Voltage I SDA = -6mA 0.4 V
CONDITIONS UNITS MIN TYP MAX PARAMETER
ELECTRICAL CHARACTERISTICS
(V DD = 3.3V, V BATT = 10V, T A = -40°C to +85°C . Typical values are at T A = +25°C, unless otherwise noted. Limits over this
temperature range are guaranteed by design.)
V
SCL, SDA, SUS Input High Voltage V
SWITCHING REGULATOR
REFERENCE AND OUTPUT
DIGITAL INPUTS AND OUTPUTS