低噪声, 5.5V输入,
PWM降压型稳压器
典型工作特性(续)
( SYNC / PWM = GND ,T
A
= + 25 ℃,除非另有说明。 )
MAX1692
振荡器频率与
电源电压
MAX1692-11
最大输出电流与
输入电压
MAX1692-12
启动时从关机
V
SHDN
2V/div
MAX1692-14
800
T
A
= +85°C
振荡器频率(kHz )
750
T
A
= +25°C
700
T
A
= -40°C
650
I
OUT
= 200毫安
600
2.7
3.1
3.5
3.9
4.3
4.7
5.1
1.4
最大输出电流( A)
LIM = IN
1.1
V
OUT
1V/div
0.8
LIM = GND
0.5
V
OUT
= 1.8V
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
2ms/div
输入电压( V)
I
IN
0.5A/div
5.5
电源电压( V)
重负载开关波形
MAX1692-15
负载瞬态响应
MAX1692-17
线路瞬态响应
V
IN
AC-
再加
2V/div
V
OUT
AC-
再加
50mV/div
MAX1692-18
V
LX
5V/div
I
LX
0.5A/div
V
LX
5V/div
I
OUT
2.5A/div
V
OUT
AC-
再加
100mV/div
V
OUT
AC耦合
100mV/div
2ms/div
V
IN
= 5V, V
OUT
= 3.3V ,我
OUT
= 700毫安
500µs/div
I
负载
= 30毫安700mA的
2ms/div
V
IN
= 3V至5V ,我
OUT
= 300毫安
回收100%占空比
MAX1692-19
开关谐波和噪声
MAX1692-22
V
IN
2V/div
V
LX
5V/div
V
OUT
AC-
再加
500mV/div
1mV/div
2ms/div
V
IN
= 3.3V至4.5V ,V
OUT
= 3.3V ,我
OUT
= 500毫安
100kHz
I
OUT
= 500毫安
1MHz
1ms/div
10MHz
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