参数资料
型号: MAX1777EEI+T
厂商: Maxim Integrated
文件页数: 10/32页
文件大小: 0K
描述: IC REG QD BUCK/LINEAR 28QSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
拓扑: 降压(降压)(2),线性(LDO)(2)
功能: 任何功能
输出数: 4
频率 - 开关: 200kHz ~ 500kHz
电压/电流 - 输出 1: 控制器
电压/电流 - 输出 2: 控制器
电压/电流 - 输出 3: 3.3V,100mA
带 LED 驱动器:
带监控器:
带序列发生器:
电源电压: 4.5 V ~ 24 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 28-SSOP(0.154",3.90mm 宽)
供应商设备封装: 28-QSOP
包装: 带卷 (TR)
High-Efficiency, Quad Output, Main Power-
Supply Controllers for Notebook Computers
Typical Operating Characteristics (continued)
(Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF, V+ = 12V, ON3 = ON5 = V CC , SHDN = V+,
R CS = 7m ? , V ILIM _ = 0.5V, T A = +25°C, unless otherwise noted.)
5.00
4.99
4.98
4.97
4.96
4.95
LDO5 REGULATOR OUTPUT VOLTAGE
vs. OUTPUT CURRENT
3.350
3.348
3.346
3.344
3.342
3.340
3.338
3.336
3.334
3.332
3.330
LDO3 REGULATOR OUTPUT VOLTAGE
vs. OUTPUT CURRENT
2.005
2.004
2.003
2.002
2.001
2.000
1.999
1.998
1.997
1.996
1.995
REFERENCE VOLTAGE
vs. OUTPUT CURRENT
0
10 20 30 40 50 60 70 80 90 100
LDO5 OUTPUT CURRENT (mA)
0
10 20 30 40 50 60 70 80 90 100
LDO3 OUTPUT CURRENT (mA)
-10 0 10 20 30 40 50 60 70 80 90 100
I REF ( μ A)
DELAYED START WAVEFORMS
DELAYED START WAVEFORMS
12V
0
REF, LDO3, AND LDO5 POWER-UP
MAX1777 toc22
V+
5V/div
5V
0
(ON3 = REF)
MAX1777 toc23
ON5
2V/div
5V
0
(ON5 = REF)
MAX1777 toc24
ON3
2V/div
3.3V
0
LDO3
2V/div
3.3V
0
OUT3
2V/div
3.3V
0
OUT3
2V/div
5V
5V
5V
0
2V
0
4ms/div
LDO5
5V/div
REF
2V/div
0
200 μ s/div
OUT5
2V/div
0
200 μ s/div
OUT5
2V/div
MAX1777/MAX1999 (TON = V CC )
5V PWM-MODE
SOFT-START WAVEFORMS
MAX1777 toc25
SHUTDOWN WAVEFORMS
MAX1777 toc26
LOAD TRANSIENT RESPONSE
MAX1777 toc27
5A
I L5
5V
ON3
V OUT ,
0
5A
0
5A/div
I L3
5A/div
0
3.3V
0
5V/div
OUT3
5V/div
5V
4A
AC-
COUPLED
100mV/div
INDUCTOR
CURRENT
3.3V
0
OUT3
5V/div
5V
0
OUT5
5V/div
1A
2A/div
5V
0
OUT5
5V/div
5V
0
SWITCHING
DL3
5V/div
5V
0
DL5
5V/div
200 μ s/div
10ms/div
20 μ s/div
10
______________________________________________________________________________________
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