参数资料
型号: MAX1997ETJ+T
厂商: Maxim Integrated Products
文件页数: 7/31页
文件大小: 0K
描述: IC PWR SUPPLY TFT LCD 32TQFN
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: 5
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: 32-WFQFN 裸露焊盘
供应商设备封装: 32-TQFN-EP(5x5)
包装: 带卷 (TR)
Quintuple/Triple-Output TFT LCD Power Supplies
with Fault Protection and VCOM Buffer
Typical Operating Characteristics
(Circuit of Figure 1, V IN = 3.3V, V MAIN = 9V, V G_ON = 20V, V G_OFF = -7V, V LOGIC = 2.5V, V GAMMA = 8.6V, T A = +25 ° C,
unless otherwise noted.)
100
STEP-UP REGULATOR EFFICIENCY
vs. LOAD CURRENT (V MAIN = 9V)
9.1
STEP-UP REGULATOR OUTPUT VOLTAGE
vs. LOAD CURRENT (V MAIN = 9V)
100
STEP-UP REGULATOR EFFICIENCY
vs. LOAD CURRENT (V MAIN = 13V)
90
80
70
9.0
8.9
90
80
70
V IN = 5.5V
V IN = 3.3V
60
50
40
30
V IN = 2.7V
V IN = 3.3V
V IN = 5.5V
8.8
8.7
V IN = 2.7V
V IN = 3.3V
V IN = 5.5V
60
50
40
30
V IN = 2.7V
20
10
0
8.6
8.5
20
10
0
1
10
100
1000
1
10
100
1000
1
10
100
1000
LOAD CURRENT (mA)
STEP-UP REGULATOR EFFICIENCY
vs. LOAD CURRENT
LOAD CURRENT (mA)
STEP-UP REGULATOR
SWITCHING FREQUENCY vs. INPUT VOLTAGE
LOAD CURRENT (mA)
STEP-UP REGULATOR NORMAL OPERATION
(200mA LOAD)
100
90
80
70
60
50
V IN = 5.5V
V IN = 3.3V
1700
1500
1300
1100
V MAIN = 9V
I MAIN = 200mA
FREQUENCY = V IN
A
MAX1997 toc06
10V
5V
0
9.02V
40
30
20
10
0
V IN = 2.7V
750kHz OPERATION
L = 4.7 μ H COILCRAFT LPO25061B-472
C OUT = 3 x 4.7 μ F/10V X7R CERAMIC
900
700
500
300
FREQUENCY = OPEN
FREQUENCY = 0
B
C
9V
8.98V
1A
0
1
10
100
1000
2.5
3.0
3.5
4.0
4.5
5.0
5.5
1 μ s/div
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
STEP-UP REGULATOR LOAD TRANSIENT RESPONSE
(WITHOUT LAG COMPENSATION, FIGURE 1)
MAX1997 toc07
200mA
A
0
9V
B
8.95V
1A
C
0.5A
0
10 μ s/div
A: I MAIN = 0 TO 200mA, 200mA/div
B: V MAIN = 9V, 50mV/div, AC-COUPLED
C: INDUCTOR CURRENT, 500mA/div
A: V LX , 5V/div
B: V MAIN = 9V, 20mV/div, AC-COUPLED
C: INDUCTOR CURRENT, 1A/div
_______________________________________________________________________________________
7
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