參數(shù)資料
型號(hào)： TC120503EHA
廠商： Microchip Technology Inc.
英文描述： PWM/PFM Step-Down Combination Regulator/Controller
中文描述： PWM / PFM切換降壓組合穩(wěn)壓器/控制器
文件頁(yè)數(shù)： 4/14頁(yè)
文件大小： 436K
代理商： TC120503EHA
TC120
DS21365B-page 4
2002 Microchip Technology Inc.
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
PIN FUNCTION TABLE
Pin No.
(8-Pin SOP)
Symbol
Description
1
2
V
IN
Unregulated supply input.
Extended external switching transistor drive output. This output follows the timing on the EXT
output with an additional 100nsec blanking time on both the leading and trailing edges. That is,
this output transitions from high-to-low 100 nsec prior to the same transition on EXT; and
transitions low-to-high 100nsec after the same transition on EXT; resulting in a longer external
switch ON time. (See
Section 3.9 External Switching Transistor Selection
).
Charge pump capacitor input. An inverting charge pump is formed by attaching a capacitor and
diode to this input. (See
Section 3.5 Improving High Load Efficiency In Regulator Operating
Mode
).
Shutdown and soft-start control input. A soft start capacitor of 100pF (min) must be connected to
this input. The soft start capacitor is charged by an internal
μ
A current source that gently ramps
the TC120 into service. Shutdown control is best implemented with an external open collector (or
open drain) switch. The TC120 enters shutdown when this input is low. During shutdown, the
regulator is disabled, and supply current is reduced to less than 2.5
μ
A. Normal operation is
restored when this input is open-circuited, and allowed to float high. (See
Section 3.6 Low Power
Shutdown Mode/Soft Start Input
).
Voltage sense input. This input must be connected to the output voltage node at the physical
location that requires the tightest voltage regulation.
Ground terminal.
External switching transistor drive output. This output connects directly to the gate of an external
P-channel MOSFET for applications requiring output currents greater than 600mA. The timing of
this output exactly matches that of the gate drive for the internal P-channel transistor. This output
can drive a maximum capacitance of 1000pF. (See
Section 3.9 External Switching Transistor
Selection
).
Inductor terminal. This pin is connected to the drain of the internal P-channel switching transistor.
If the TC120 is operated as a regulator (i.e., using the internal switch); the inductor must be
connected between this pin and the SENSE pin.
EXTW
3
CPC
4
SHDN/SS
5
SENSE
6
7
GND
EXT
8
Lx
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TC120503EHATR 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 PWM/PFM Step-Down RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
TC1207D-100M 制造商:PRODUCTWELL 制造商全稱:PRODUCTWELL 功能描述:TOROID INDUCTORS
TC1207D-320M 制造商:PRODUCTWELL 制造商全稱:PRODUCTWELL 功能描述:TOROID INDUCTORS
TC1210A 制造商:Thomas & Betts 功能描述:Fittings Connector 4inch Steel
TC12-11CGKWA 制造商:Kingbright Corporation 功能描述:DOT MATRIX 1.2" CMN CATHODE GREEN 制造商:Kingbright Corporation 功能描述:DOT MATRIX, 1.2" CMN CATHODE, GREEN 制造商:Kingbright Corporation 功能描述:DOT MATRIX, 1.2" CMN CATHODE, GREEN; Display Dots x Lines:5 x 7; LED Color:Green; Luminous Intensity:73mcd; LED Display Type:Dot Matrix; Peak Wavelength:574nm; Forward Voltage:2.1V; Display Size:22.9mm x 39mm ;RoHS Compliant: Yes
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