參數(shù)資料
型號(hào)： TPS62000SHKK
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 1.6 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, CDFP10
封裝： CERAMIC, DFP-10
文件頁(yè)數(shù)： 7/23頁(yè)
文件大?。?/td> 531K
代理商： TPS62000SHKK
Low Noise Antiringing Switch
An
antiringing
switch is implemented in order to reduce the EMI radiated from the converter during discontinuous
conduction mode (DCM). In DCM, the inductor current ramps to zero before the end of each switching period.
The internal load comparator turns off the low side switch at that instant thus preventing the current flowing
backward through the inductance which increases the efficiency. An antiringing switch across the inductor
prevents parasitic oscillation caused by the residual energy stored in the inductance (see
Figure 12
).
Soft Start
As the enable pin (EN) goes high, the soft-start function generates an internal voltage ramp. This causes the
start-up current to slowly rise preventing output voltage overshoot and high inrush currents. The soft-start
duration is typical 1 ms (see
Figure 13
). When the soft-start function is completed, the error amplifier is
connected directly to the internal voltage reference.
Enable
Logic low on EN forces the TPS62000 into shutdown. In shutdown, the power switch, drivers, voltage reference,
oscillator, and all other functions are turned off. The supply current is reduced to less than 1
μ
A in the shutdown
mode.
Undervoltage Lockout
An undervoltage lockout circuit provides the save operation of the device. It prevents the converter from turning
on when the voltage on V
IN
is less than typically 1.6 V.
No Load Operation
In case the converter operates in the forced PWM mode and there is no load connected to the output, the
converter will regulate the output voltage by allowing the inductor current to reverse for a short period of time.
www.ti.com
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