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| 型号： | MAX8784ETL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/24页 |
| 文件大小： | 0K |
| 描述： | IC REG STP UP W/AMP 40-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | LCD 电视机/监控器 |
| 电源电压： | 4 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
Step-Up Regulator, Internal Charge Pumps, Switch
Control, and Operational Amplifier for TFT LCDs
Pin Description
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13, 19,
20, 26
14
15
16
17
18
21
22
23
24
25
27, 28
29, 30
NAME
C1N
C1P
BGND
SUP
POS1
NEG1
OUT1
OUT2
NEG2
POS2
POS3
OUT3
N.C.
ADEL
GDEL
CTL
HVS
DRVN
FBN
REF
AGND
V CC
SHDN
PGND
LX
FUNCTION
Negative Terminal of Flying Capacitor C1
Positive Terminal of Flying Capacitor C1
Operational Amplifier and Charge-Pump Supply Ground
Operational Amplifier and Charge-Pump Supply Input. Connect SUP to AVDD. Bypass SUP to BGND with
0.1μF capacitor.
Operational Amplifier Noninverting Input
Operational Amplifier Inverting Input
Operational Amplifier Output
Operational Amplifier Output
Operational Amplifier Inverting Input
Operational Amplifier Noninverting Input
Operational Amplifier Noninverting Input
Operational Amplifier Output
No Connection. Not internally connected.
Step-Up Regulator Delay Input. Connect a capacitor from ADEL to AGND to set the delay time. A 5μA current
source charges C ADEL . ADEL is internally pulled to AGND by a 20 ? resistor in shutdown. For details, see the
Power-Up Sequence section.
Positive Charge-Pump Startup Delay and High-Voltage Switch Delay Input. Connect a capacitor from GDEL to
AGND to set the delay time. A 5μA current source charges C GDEL . GDEL is internally pulled to AGND by a
20 ? resistor in shutdown. For details, see the Power-Up Sequence section.
High-Voltage Switch Control Input. When CTL is high, the switch between GON and POUT is turned on and
the switch between GON and DRN is turned off. When CTL is low, the switch between GON and DRN is
turned on and the switch between GON and POUT is turned off. For details, see the High-Voltage Switch
Control section.
HVS Mode Input. Connect HVS to V CC to enable HVS mode. For details, see the HVS Mode section.
Negative Charge-Pump Regulator Output. Connect DRVN to the negative charge-pump flying capacitor(s).
Negative Charge-Pump Regulator Feedback Input. Connect FBN to the center of a resistive voltage-divider
between the negative output and REF. Place the resistive voltage-divider within 5mm of FBN. For details, see
the Output-Voltage Selection section.
Reference Output. Connect a 0.22μF capacitor from REF to AGND.
Analog Ground
V CC Supplies the Internal Reference and Other Internal Circuitry. Connect V CC to the input supply voltage
and bypass V CC to AGND with a minimum 1μF ceramic capacitor.
Active-Low Shutdown. When SHDN is low, the device enters its low-power shutdown mode.
Power Ground
Step-Up Regulator Switching Node. Connect inductor and Schottky diode to LX and minimize trace area for
lowest EMI.
10
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