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參數(shù)資料
| 型號： | TC1189 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | MAX8863/64 Pin Compatible, Low Dropout, 120 mA Linear Regulators |
| 中文描述： | MAX8863/64引腳兼容，低壓差，120毫安線性穩(wěn)壓器 |
| 文件頁數(shù)： | 6/16頁 |
| 文件大?。?/td> | 301K |
| 代理商： | TC1189 |
TC1188/TC1189
DS21364B-page 6
2002 Microchip Technology Inc.
3.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PIN FUNCTION TABLE
3.1
Detailed Description
The TC1188/TC1189 devices are fixed output, low
dropout linear regulators. Utilizing CMOS construction,
the internal quiescent current consumed by the regula-
tor is minimized when compared to older bipolar low
dropout regulators.
The LDO output voltage is sensed at the non-inverting
pin of the internal error amplifier. The internal voltage
reference is sensed at the inverting pin of the internal
error amplifier. The error amplifier adjusts the gate
source voltage of the internal P-channel pass device
until the divided down output voltage matches the inter-
nal reference voltage. When it does, the LDO output
voltage is in regulation.
The SHDN, when pulled low, is used to turn off the P-
Channel MOSFET and lower the internal quiescent
current to less than 1 μA maximum. For normal opera-
tion, the SHDN pin is pulled to a high level. (> 2.0V).
The TC1189 incorporates an internal N-Channel MOS-
FET, which is used to discharge the output capacitor
when shutdown. The TC1188 does not have the inter-
nal N-Channel MOSFET, therefore, when the device is
shutdown, the output voltage will decrease at a rate
which is dependant on the load current.
3.2
Turn-On Response
The turn-on response is defined as two separate
response categories: Wake-Up Time (t
WK
) and Settling
Time (t
S
).
The TC1188/TC1189 have fast wake-up times (10 μsec
typical) when released from shutdown. See Figure 3-1
for the wake-up time, designated as t
WK
. The wake-up
time is defined as the time it takes for the output to rise
to 2% of the V
OUT
value after being released from shut-
down.
The total turn on response is defined as the Settling
Time (t
S
) (Figure 3-1). Settling Time (inclusive with t
WK
)
is defined as the condition when the output is within 2%
of its fully enabled value (140 μsec typical) when
released from shutdown. The settling time of the output
voltage is dependent on load conditions and output
capacitance on V
OUT
(RC response).
FIGURE 3-1:
Wake-Up Response Time.
3.3
Internal P-Channel Pass
Transistor
The Internal P-Channel MOSFET is operated in the lin-
ear region to regulate the LDO output voltage. The
RDSon of the P-Channel MOSFET is approximately
1.1
,
making the LDO able to regulate with little input
to output voltage differential, "Low Dropout". Another
benefit of using CMOS construction is that the P-Chan-
nel MOSFET is a voltage controlled device, so it
doesn't consume a fraction of the bias current required
of bipolar PNP LDOs.
Symbol
Description
SHDN
Active Low Shutdown Input. When the SHDN input is low (< 0.2V), the quiscent current for the
TC1188/TC1189 is reduced to 0.1 nA. When the input voltage to the SHDN pin is high (> 2.0V) the
output of the TC1188/TC1189 is enabled. For the TC1189 only, the output capacitor is discharged by
an internal switch when the SHDN is low.
Ground. Connect to ground.
Unregulated Input Voltage. The input voltage can range from 2.7V to 6.0V.
Regulator Output. Sources up to 120 mA. Bypass with a 1 μF, <1
typical ESR capacitor to GND.
Connect to GND.
GND
V
IN
V
OUT
GND
V
IH
t
S
t
WK
V
OUT
98%
2%
V
IL
SHDN
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TC12-11YWA | Coaxial Cable; Coaxial RG/U Type:59; Impedance:75ohm; Conductor Size AWG:25; No. Strands x Strand Size:Solid; Jacket Material:Polyethylene; Capacitance:16.9pF/ft; Conductor Material:Copper; Jacket Color:Yellow RoHS Compliant: Yes |
| TC12-11GWA | 30 MM 5 X 7 DOT MATRIX DISPLAYS |
| TC12-11SRWA | 30 MM 5 X 7 DOT MATRIX DISPLAYS |
| TC12-11EWA | 30 MM 5 X 7 DOT MATRIX DISPLAYS |
| TC120303EHA | PWM/PFM Step-Down Combination Regulator/Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC-1189 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:MAX8863/64 Pin Compatible, Low Dropout, 120 mA Linear Regulators |
| TC1189QECTTR | 功能描述:低壓差穩(wěn)壓器 - LDO 1.80V 100mA MAX8863/ 64 Pin Comp LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TC1189RECTTR | 功能描述:低壓差穩(wěn)壓器 - LDO 2.80V 100mA MAX8863/ RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TC1189SECTTR | 功能描述:低壓差穩(wěn)壓器 - LDO 2.84V 100mA MAX8863/ 64 Pin Comp LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TC1189TECTTR | 功能描述:低壓差穩(wěn)壓器 - LDO 3.15V 100mA MAX8863/ 64 Pin COMP LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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