参数资料
型号: BD9533EKN-E2
厂商: Rohm Semiconductor
文件页数: 10/23页
文件大小: 0K
描述: IC REG SW VAR SOFT START 20-HQFN
标准包装: 1
系列: H³Reg™
应用: 转换器,DDR SDRAM
输入电压: 4.5 V ~ 28 V
输出数: 1
输出电压: 0.7 V ~ 2 V
工作温度: -10°C ~ 100°C
安装类型: 表面贴装
封装/外壳: 20-VFQFN 裸露焊盘
供应商设备封装: 20-HQFN
包装: 标准包装
产品目录页面: 1373 (CN2011-ZH PDF)
其它名称: BD9533EKN-E2DKR
● Timing Chart
? Soft Start Function
Soft start is exercised with the EN pin set high. Current
EN
T SS
control takes effect at startup, enabling a moderate
output voltage “ramping start.” Soft start timing and
incoming current are calculated with formulas (2) and
(3) below.
SS
Soft start time
V OUT
Tss=
REF × Css
2 μ A(typ)
[sec] ??? (2)
Incoming current
IIN
I IN =
Co × V OUT
Tss
[A] ??? (3)
(Css: Soft start capacitor; Co: Output capacitor)
? Timer Latch Type Short Circuit Protection
REF × 0.7
Short protection kicks in when output falls to or below
V OUT
SCP
T SCP
REF X 0.7. When the programmed time period elapses,
output is latched OFF to prevent destruction of the IC.
Output voltage can be restored either by reconnecting
the EN pin or disabling UVLO. Short circuit protection
time is programmed using formula (4) below.
Short protection time setting
EN/UVLO
Tscp=
1.25(V) × C SCP
2 μ A(typ)
[sec] ??? (4)
? Over Voltage Protection
REF × 1.2
VOUT
HG
LG
Switching
10/20
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