MAX1518B 查看數據表（PDF） - Maxim Integrated
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MAX1518B Datasheet PDF : 25 Pages
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TFT-LCD DC-DC Converter with
Operational Amplifiers
Typical Operating Characteristics (continued)
(Circuit of Figure 1. VIN = 5V, VMAIN = 13V, VGON = 24V, VGOFF = -8V, VOUT1 = VOUT2 = VOUT3 = VOUT4 = VOUT5 = 6.5V, TA = +25°C
unless otherwise noted.)
OPERATIONAL-AMPLIFIER
LOAD-TRANSIENT RESPONSE
MAX1518B toc15
0V A
OPERATIONAL-AMPLIFIER
LARGE-SIGNAL STEP RESPONSE
MAX1518B toc16
VSUP = 6V
A
OPERATIONAL-AMPLIFIER
SMALL-SIGNAL STEP RESPONSE
MAX1518B toc17
A
+50mA
B
0
-50mA
400ns/div
A: OUTPUT VOLTAGE, 1V/div, AC-COUPLED
B: OUTPUT CURRENT, 50mA/div
1µs/div
A: INPUT SIGNAL, 2V/div
B: OUTPUT SIGNAL, 2V/div
0V
0V
B
B
0V
0V
400ns/div
A: INPUT SIGNAL, 100mV/div
B: OUTPUT SIGNAL, 100mV/div
Pin Description
PIN
NAME
FUNCTION
1
SRC
Switch Input. Source of the internal high-voltage p-channel MOSFET. Bypass SRC to PGND with a
minimum 0.1µF capacitor close to the pins.
2
REF
Reference Bypass Terminal. Bypass REF to AGND with a minimum of 0.22µF close to the pins.
3
AGND
Analog Ground for Step-Up Regulator and Linear Regulators. Connect to power ground (PGND)
underneath the IC.
Power Ground. PGND is the source of the main step-up n-channel power MOSFET. Connect PGND to
4
PGND the output-capacitor ground terminals through a short, wide PC board trace. Connect to analog ground
(AGND) underneath the IC.
5
OUT1 Operational-Amplifier 1 Output
6
NEG1 Operational-Amplifier 1 Inverting Input
7
POS1 Operational-Amplifier 1 Noninverting Input
8
OUT2 Operational-Amplifier 2 Output
9
NEG2 Operational-Amplifier 2 Inverting Input
10
POS2 Operational-Amplifier 2 Noninverting Input
11
BGND Analog Ground for Operational Amplifiers. Connect to power ground (PGND) underneath the IC.
12
POS3 Operational-Amplifier 3 Noninverting Input
13
OUT3 Operational-Amplifier 3 Output
14
SUP
Operational-Amplifier Power Input. Positive supply rail for the operational amplifiers. Typically
connected to VMAIN. Bypass SUP to BGND with a 0.1µF capacitor.
15
POS4 Operational-Amplifier 4 Noninverting Input
16
NEG4 Operational-Amplifier 4 Inverting Input
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