參數(shù)資料
型號(hào)： LM3370TLX-2613/NOPB
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： 1.4 A DUAL SWITCHING CONTROLLER, 2400 kHz SWITCHING FREQ-MAX, PBGA20
封裝： 3 X 2 MM, 0.60 MM HEIGHT, 0.50 MM PITCH, , MO-211DG, MICRO, SMD-20
文件頁數(shù)： 7/26頁
文件大?。?/td> 5436K
代理商： LM3370TLX-2613/NOPB
FORCED PWM MODE
The LM3370 auto mode can be bypassed by forcing the de-
vice to operate in PWM mode, this can be implemented
through the I2C-compatible interface, see Table 1.
SOFT-START
The LM3370 has a soft start circuit that limits in-rush current
during start up. Soft start is activated only if EN goes from
logic low to logic high after V
IN reaches 2.7V.
LDO - LOW DROP OUT OPERATION
The LM3370 can operate at 100% duty cycle (no switching,
PFET switch completely on) for low drop out support of the
output voltage. In this way the output voltage will be controlled
down to the lowest possible input voltage. The minimum input
voltage needed to support the output voltage is V
IN,MIN =
I
LOAD*(RDSON,PFET + RINDUCTOR) + VOUT
I
LOAD
load current
R
DSON/PFET
drain to source resistance of PFET switch in the
triode region
R
INDUCTOR
inductor resistance
20167303
FIGURE 2. Operation in PFM Mode and Transfer to PWM Mode
15
www.national.com
LM3370
相關(guān)PDF資料
PDF描述
LM3370TL-2613/NOPB 1.4 A DUAL SWITCHING CONTROLLER, 2400 kHz SWITCHING FREQ-MAX, PBGA20
LM3420A12.6MDA 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC
LM3420A-8.2MWA 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC
LM3420A-4.2MWA 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC
LM3420A-4.2MDA 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC
相關(guān)代理商/技術(shù)參數(shù)
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