参数资料
型号: MAX1748EUE+
厂商: Maxim Integrated Products
文件页数: 7/16页
文件大小: 0K
描述: IC DC-DC CONV TRPL LCD 16-TSSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 96
应用: 转换器,TFT,LCD
输入电压: 2.7 V ~ 5.5 V
输出数: 3
输出电压: 2.7 V ~ 13 V
工作温度: 0°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 16-TSSOP
包装: 管件
产品目录页面: 1410 (CN2011-ZH PDF)
Triple-Output TFT-LCD
DC-DC Converters
Typical Operating Characteristics (continued)
(Circuit of Figure 5, V IN = 3.3V, T A = +25°C, unless otherwise noted.)
MAIN BOOST STARTUP
MAIN BOOST STARTUP WAVEFORM
MAX1748/8726 toc16
WAVEFORM WITH LOAD
MAX1748/8726 toc17
2V
0
10V
0
V SHDN
2V/div
V MAIN
5V/div
2V
0
10V
0
V SHDN
2V/div
V MAIN
5V/div
I LX
500mA/div
0
1ms/div
R MAIN = 1k Ω , V MAIN = 10V
MAX1748 POWER-UP SEQUENCING
MAX1748/8726 toc18
2ms/div
V MAIN = 10V, V NEG = -5V, V POS = 15V
I LX
500mA/div
V SHDN
2V/div
V MAIN
5V/div
V NEG
5V/div
V POS
10V/div
0
1ms/div
V MAIN = 10V, R MAIN = 50 Ω ( 200mA)
MAX8726 POWER-UP SEQUENCING
MAX1748/8726 toc19
V SHDN
5V/div
V MAIN
5V/div
V NEG
5V/div
V POS
10V/div
4ms/div
V MAIN = 10V, V NEG = -5V, V POS = 15V
Pin Description
PIN
1
2
3
4
5
6
7
NAME
RDY
FB
INTG
IN
GND
REF
FBP
FUNCTION
Active-Low, Open-Drain Output. Indicates all outputs are ready. The on-resistance is 125 Ω (typ).
Main Boost Regulator Feedback Input. Regulates to 1.248V nominal. Connect feedback resistive
divider to analog ground (GND).
Main Boost Integrator Output. If used, connect 470pF to analog ground (GND). To disable integrator,
connect to REF.
Supply Input. +2.7V to +5.5V input range. Bypass with a 0.1μF capacitor between IN and GND, as
close to the pins as possible.
Analog Ground. Connect to power ground (PGND) underneath the IC.
Internal Reference Bypass Terminal. Connect a 0.22μF capacitor from this terminal to analog ground
(GND). External load capability to 50μA.
Positive Charge-Pump Regulator Feedback Input. Regulates to 1.25V nominal. Connect feedback
resistive divider to analog ground (GND).
_______________________________________________________________________________________
7
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