参数资料
型号: MAX1889ETE+T
厂商: Maxim Integrated Products
文件页数: 7/32页
文件大小: 0K
描述: IC PWR SUP TRPL LCD 16-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
应用: 控制器,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-WQFN 裸露焊盘
供应商设备封装: 16-TQFN-EP(5x5)
包装: 带卷 (TR)
Triple-Output TFT LCD Power Supply
with Fault Protection
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V IN = +3.3V, V MAIN = +9V, V PL = +20V, V NL = -7V, SHDN = FREQ = IN, PGND = GND, T A = +25 ° C, unless
otherwise noted.)
POWER-UP SEQUENCE FROM
SLOW-RISING INPUT SUPPLY
STEP-UP REGULATOR SOFT-START
(10mA LOAD) USING SHDN CONTROL
STEP-UP REGULATOR SOFT-START
(200mA LOAD) USING SHDN CONTROL
A
B
MAX1889 toc10
5V
0
5V
0
A
B
MAX1889 toc11
5V
0
5V
0
A
B
MAX1889 toc12
5V
0
5V
0
20V
5V
5V
C
10V
C
0
C
0
0
10V
10V
D
0
-10V
D
5V
0
D
5V
0
2ms/div
A: V IN , 5V/div
B: V MAIN = 9V, 5V/div
C: V PL = 20V, 10V/div
D: V NL = -7V, 10V/div
POWER-UP SEQUENCE
USING SHDN CONTROL
1ms/div
A: V SHDN , 5V/div
B: V GATE , 5V/div
C: V C2 , 5V/div
D: V MAIN = 9V, 5V/div
STEP-UP REGULATOR NORMAL OPERATION
(200mA LOAD)
1ms/div
A: V SHDN , 5V/div
B: V GATE , 5V/div
C: V C2 , 5V/div
D: V MAIN = 9V, 5V/div
POSITIVE CHARGE-PUMP
OUTPUT VOLTAGE vs. LOAD CURRENT
A
B
MAX1889 toc13
5V
0
5V
0
20V
A
MAX1889 toc14
10V
5V
0
9.05V
26.2
26.0
25.8
25.6
C
10V
B
9V
25.4
0
1A
D
2ms/div
0
-10V
C
1 μ s/div
500mA
0
25.2
25.0
0.1
V IN = 3.3V
I MAIN = 200mA
1
10
A: V SHDN , 5V/div
B: V MAIN = 9V, 5V/div
C: V PL = 20V, 10V/div
D: V NL = -7V, 10V/div
A: V LX , 5V/div
B: V MAIN = 9V, 50mV/div, AC-COUPLED
C: INDUCTOR CURRENT, 500mA/div
LOAD CURRENT (mA)
_______________________________________________________________________________________
7
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