参数资料
型号: ADP2370ACPZ-5.0-R7
厂商: Analog Devices Inc
文件页数: 24/32页
文件大小: 0K
描述: IC REG BUCK SYNC 5V 0.8A 8LFCSP
标准包装: 1,500
类型: 降压(降压)
输出类型: 固定
输出数: 1
输出电压: 5V
输入电压: 3.2 V ~ 15 V
PWM 型: 电流模式
频率 - 开关: 600kHz ~ 1.2MHz
电流 - 输出: 800mA
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-WDFN 裸露焊盘,CSP
包装: 带卷 (TR)
供应商设备封装: 8-LFCSP(3x3)
ADP2370/ADP2371
SW
1
Data Sheet
2
V OUT
3
INDUCTOR CURRENT
ENABLE
V OUT
32
4
SYNC
1
PG
W M2.00μs A CH2
W
CH1 5.00V BW CH2 50.0mV
CH3 200mA ? BW CH4 5.00V
B
B
T 20.0%
–57.0mV
CH1 500mV BW
CH3 5.00V BW
CH2 1.00V BW
M40.0μs
T 10.00%
A CH3
3.40V
Figure 79. SYNC Transient 800 kHz to 1.2 MHz
POWER GOOD
The ADP2370 / ADP2371 power-good (PG) output indicates the
state of the monitored output voltage. The PG function is an active
high, open-drain output, requiring an external pull-up resistor that
is typically supplied from the I/O supply rail, as shown in Figure 1.
When the sensed output voltage is below 87% of its nominal value,
the PG pin is held low. When the sensed output voltage rises above
92% of the nominal level, the PG line is pulled high after t RESET .
The PG pin remains high when the sensed output voltage is
above 92% of the nominal output voltage level.
2
Figure 80. Typical PG Timing at Startup
V OUT
PG
LOAD CURRENT
1
CH1 500mV
W
The typical PG delay when the buck is in PWM mode is 20 μs.
Figure 80 shows the typical PG operation during startup. Figure 81
shows the PG operation when there is a large load transient that
3
B
CH3 500mA ? BW
CH2 1.00V BW
M1.00μs A CH3
T 10.00%
740mA
causes the output voltage to fall just below the PG threshold.
Figure 81. Typical PG Timing with 200 mA to 1100 mA Load Transient
When not using the PG function, remove the pull-up resistor
and leave the PG pin either open or shorted to ground.
Rev. D | Page 24 of 32
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