參數(shù)資料
型號： L6731BTR
廠商： 意法半導體
英文描述： Transistor; Type: Amplifiers/Bipolar; VCEO (V): -25; Ic (A): -1; Pc (W): 0.8; hFE: 85 to 330; VCE (sat) (V) max: -0.5; Package: TO-92Mod
中文描述： 可調(diào)式降壓同步整流專用的DDR控制器內(nèi)存
文件頁數(shù)： 12/24頁
文件大?。?/td> 311K
代理商： L6731BTR
Device description
L6731B
12/24
5.5
Error amplifier
5.6
Soft start
When both V
CC
and V
IN
are above their turn-ON thresholds (V
IN
is monitored by the OCH pin)
the start-up phase takes place. Otherwise the SS pin is internally shorted to GND. At start-up, a
ramp is generated charging the external capacitor C
SS
with an internal current generator. The
initial value for this current is 35μA and charges the capacitor up to 0.5V. After that it becomes
10μA until the final charge value of approximately 4V (see
Figure 6.
).
Figure 5.
Error Amplifier Reference
Figure 6.
Device start-up: Voltage at the SS pin.
2.5V
100K
DDR-IN
V
CCDR
0.6V/500KHz
0.6V/250KHz
DDR-IN/2
250KHz
Error Amplifier Ref.
V
CC
V
IN
t
t
0.5V
4V
Vcc
Vn
Vss
4.2V
1.25V
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相關代理商/技術參數(shù)
參數(shù)描述
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L6732_08 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification
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