MAX1661 Datasheet, PDF (5/16 Pages) Maxim Integrated Products – Active-Matrix Liquid Crystal Display AMLCD Supply

Active-Matrix Liquid Crystal Display
(AMLCD) Supply
Typical Operating Characteristics (continued)
(f_BPCLK = 22.5kHz, FPLL = GND, L1 = 3.3µH, L2 = 4.7µH, T_A = +25°C, unless otherwise noted.)
V_OUT1 LINE-TRANSIENT RESPONSE
V_OUT2+ LINE-TRANSIENT RESPONSE
A
50mV/
div
B
500mV/
div
2ms/div
V_OUT1 = 5V, I_LOAD = 250mA, C_OUT1 = 20µF
A: V_OUT1, 50mV/div, AC COUPLED
B: V_IN, 3V to 4V
V_OUT2- LINE-TRANSIENT RESPONSE
200mV/
A
div
A
200mV/
div
B
500mV/
div
2ms/div
V_OUT2+ = 15V, I_LOAD = 5mA, C_OUT2+ = 0.22µF
A: V_OUT2+, 200mV/div, AC COUPLED
B: V_IN, 3V to 4V
V_OUT1 LOAD-TRANSIENT RESPONSE
A
50mV/
div
B
500mV/
div
B
100mA/
div
2ms/div
V_OUT2- = -5V, I_LOAD = 5mA, C_OUT2- = 0.47µF
A: V_OUT2-, 200mV/div, AC COUPLED
B: V_IN, 3V to 4V
INTERNAL FET ON-RESISTANCE
vs. TEMPERATURE
1400
1200
LX2N
1000
800
BPDRV P-CHANNEL ^LX2P
600
400
BPDRV N-CHANNEL
200
LX1
0
0 10 20 30 40 50 60 70 80 90
TEMPERATURE (°C)
2ms/div
V_OUT1 = 5V, V_IN = 3.3V, C_OUT1 = 20µF
A: V_OUT1, 50mV/div, AC COUPLED
B: I_OUT1, 25mA TO 225mA, 100mA/div
BPDRV RISE AND FALL TIME
vs. LOAD CAPACITANCE
300
250
200
RISE TIME
150
100
50
0
0.001
FALL TIME
C_LOAD FROM
BPDRV TO GND
0.01
0.1
1
LOAD CAPACITANCE (µF)
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