công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
TC1014 bảng dữ liệu(PDF) 8 Page - TelCom Semiconductor, Inc |
|
TC1014 bảng dữ liệu(HTML) 8 Page - TelCom Semiconductor, Inc |
8 / 10 page TC1015 3 PRELIMINARY INFORMATION TC1015-01-6/5/97 100mA CMOS LDO WITH SHUTDOWN AND REFERENCE BYPASS Pin No. 1VIN Unregulated supply input. 2 GND Ground terminal. 3 SHDN Shutdown control input. The regulator is fully enabled when a logic high is applied to this input. The regulator enters shutdown when a logic low is applied to this input. During shutdown, output voltage falls to zero, and supply current is reduced to under 1 microamp (typical). 4 Bypass Reference bypass input. Connecting a 470pF to this input further reduces output noise. 5VOUT Regulated voltage output. PIN DESCRIPTION (SOT-23A-5) Symbol Description DETAILED DESCRIPTION The TC1015 is a precision fixed output voltage regula- tor. (If an adjustable version is desired, please see the TC1070 or TC1071 data sheets.) Unlike the bipolar regula- tors, the TC1015 supply current does not increase with load current. In addition, VOUT remains stable and within regula- tion at very low load currents (an important consideration in RTC and CMOS RAM battery back-up applications). Figure 1 shows a typical application circuit. The regula- tor is enabled any time the shutdown input (SHDN) is at or above VIH, and shutdown (disabled) when SHDN is at or below VIL. SHDN may be controlled by a CMOS logic gate, or I/O port of a microcontroller. If the SHDN input is not required, it should be connected directly to the input supply. While in shutdown, supply current decreases to 0.05 µA (typical) and VOUT falls to zero volts. Bypass Input A 470pF capacitor connected from the Bypass input to ground reduces noise present on the internal reference, which in turn significantly reduces output noise. If output noise is not a concern, this input may be left unconnected. Larger capacitor values may be used, but results in a longer time period to rated output voltage when power is initially applied. Output Capacitor A 1 µF (min) capacitor from VOUT to ground is recom- mended. The output capacitor should have an effective series resistance of 5 Ω or less, and a resonant frequency above 1MHz. A 1 µF capacitor should be connected from VIN to GND if there is more than 10 inches of wire between the regulator and the AC filter capacitor, or if a battery is used as the power source. Aluminum electrolytic or tantalum capaci- tor types can be used. (Since many aluminum electrolytic capacitors freeze at approximately – 30 °C, solid tantalums are recommended for applications operating below – 25 °C.) When operating from sources other than batteries, supply- noise rejection and transient response can be improved by increasing the value of the input and output capacitors and employing passive filtering techniques. Thermal Considerations Thermal Shutdown Integrated thermal protection circuitry shuts the regula- tor off when die temperature exceeds 160 °C. The regulator remains off until the die temperature drops to approximately 150 °C. Power Dissipation The amount of power the regulator dissipates is prima- rily a function of input and output voltage, and output current. The following equation is used to calculate worst case actual power dissipation: Figure 1. Typical Application Circuit 1 µF 470pF Reference Bypass Cap (Optional) Shutdown Control (to CMOS Logic or Tie to V IN if Unused) TC1015 VIN BATTERY VOUT Bypass SHDN GND VOUT 1 µF |
Số phần tương tự - TC1014 |
|
Mô tả tương tự - TC1014 |
|
|
Link URL |
Chính sách bảo mật |
ALLDATASHEET.VN |
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không? [ DONATE ] |
Alldatasheet là | Quảng cáo | Liên lạc với chúng tôi | Chính sách bảo mật | Trao đổi link | Tìm kiếm theo nhà sản xuất All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |