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參數(shù)資料
| 型號： | LT3695IMSE-5#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2 A SWITCHING REGULATOR, 2420 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-16 |
| 文件頁數(shù)： | 16/30頁 |
| 文件大小： | 491K |
| 代理商： | LT3695IMSE-5#PBF |
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LT3695 Series
23
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APPLICATIONS INFORMATION
Table 5: Effects of Pin Shorts
PINS
EFFECT
PGND-DA
No effect if VIN < VIN(MAX). See Input Voltage Range section for description of VIN(MAX).
SW-RUN/SS
The result of this short depends on the load resistance and on R3 (Figure 10). See the following discussion.
RUN/SS-RT
No effect or VOUT will fall below regulation voltage if IR3 (Figure 10) < 1mA.
RT-SYNC
No effect or VOUT will fall below regulation voltage if the current into the RT pin is less than 1mA.
SYNC-VIN
No effect if VIN does not exceed the absolute maximum voltage of SYNC (20V).
PG-GND
No effect.
GND-BD (LT3695)
VOUT may fall below regulation voltage, power dissipation of the power switch will be increased. Note that this short also
grounds the voltage source supplying BD. Make sure it is safe to short the supply for BD to ground. For this reason BD should
not be connected to VIN, but it is safe to connect it to VOUT.
BD-BOOST (LT3695)
If diode D2 (see Figure 10) is used, no effect or VOUT may fall below regulation voltage. Otherwise the device may be damaged.
GND-OUT2
(LT3695-3.3, LT3695-5)
VOUT will fall below regulation voltage, because this shorts the output to ground. As a result, the power dissipation of the part
may increase.
Table 6: Effects of Floating Pins
PIN
EFFECT
PGND
No effect if the Exposed Pad is soldered.
Otherwise: VOUT may fall below regulation voltage. Make sure that VIN < VIN(MAX) (see Input Voltage Range section for details)
and provide a bypass resistor at the DA pin. See the following discussion.
DA
VOUT may fall below regulation voltage. Make sure that VIN < VIN(MAX) (see Input Voltage Range section for details) and provide
a bypass resistor. See the following discussion.
SW
VOUT will fall below regulation voltage.
RUN/SS
VOUT will fall below regulation voltage.
RT
VOUT will fall below regulation voltage.
SYNC
VOUT may fall below regulation voltage. A oating SYNC pin congures the LT3695 for pulse-skipping mode. However, a
oating SYNC pin is sensitive to noise which can degrade device performance.
VIN
VOUT will fall below regulation voltage.
VC
VOUT may fall below regulation voltage. Disconnecting the VC pin alters the loop compensation and potentially degrades device
performance. The output voltage ripple will increase if the part becomes unstable.
FB (LT3695)
VOUT will fall below regulation voltage.
PG
No effect.
GND
Output maintains regulation, but potential degradation of device performance.
BD (LT3695)
VOUT may fall below regulation voltage. If BD is not connected, the boost capacitor cannot be charged and thus the power
switch cannot saturate properly, which increases its power dissipation.
OUT1, OUT2
(LT3695-3.3, LT3695-5)
No effect.
BOOST
VOUT may fall below regulation voltage. If BOOST is not connected, the boost capacitor cannot be charged and thus the power
switch cannot saturate properly, which increases its power dissipation.
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