参数资料
型号: TC1301B-UWAVMF
厂商: Microchip Technology Inc.
英文描述: Dual LDO with Microcontroller RESET Function
中文描述: 双路LDO稳压器与微控制器的复位功能
文件页数: 16/28页
文件大小: 890K
代理商: TC1301B-UWAVMF
TC1301A/B
DS21798B-page 16
2005 Microchip Technology Inc.
5.14
TC1301B RESET Timing
The timing waveforms for the TC1301B RESET output
are shown in Figure 5-4. Note that the RESET
threshold input for the TC1301B is V
OUT1
. The V
OUT1
to RESET threshold detector connection is made
internal in the case of the TC1301B.
FIGURE 5-4:
TC1301B RESET Timing.
5.15
Device Protection
5.15.1
OVERCURRENT LIMIT
In the event of a faulted output load, the maximum
current the LDO output will permit to flow is limited
internally for each of the TC1301A/B outputs. The peak
current limit for V
OUT1
is typically 1.1A, while the peak
current limit for V
OUT2
is typically 0.5A. During short-
circuit operation, the average current is limited to
200 mA for V
OUT1
and 140 mA for V
OUT2
.The V
DET
and RESET circuit will continue to operate in the event
of an overcurrent on either output for the TC1301A.
The voltage detect and RESET circuit will continue to
operate in the event of an overcurrent on V
OUT1
(or
V
OUT2
) for the TC1301B. In the event of an overcurrent
on V
OUT1
, the RESET will detect the absence of V
OUT1
.
5.15.2
OVERTEMPERATURE
PROTECTION
If the internal power dissipation within the TC1301A/B
is excessive due to a faulted load or higher-than-
specified line voltage, an internal temperature-sensing
element will prevent the junction temperature from
exceeding approximately 150
°
C. If the junction
temperature does reach 150
°
C, both outputs will be
disabled until the junction temperature cools to
approximately 140
°
C. The device will resume normal
operation. If the internal power dissipation continues to
be excessive, the device will again shut off. The V
DET
and RESET circuit will continue to operate normally
during an overtemperature fault condition for both the
TC1301A and TC1301B.
RESET Time
T
RPD
V
TH
V
OUT1
RESET
1V
V
OL
V
OH
V
IN
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