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TC1240 数据表(PDF) 2 Page - TelCom Semiconductor, Inc |
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TC1240 数据表(HTML) 2 Page - TelCom Semiconductor, Inc |
2 / 9 page TC1240 2 TC1240-1 7/7/00 Positive Doubling Charge Pump with Shutdown in SOT Package ABSOLUTE MAXIMUM RATINGS* Input Voltage (VIN to GND) .......................... +4.5V, –0.3V Output Voltage (OUT to GND) .............. +9.0V, VIN – 0.3V Current at OUT Pin ................................................. 50 mA Short-Circuit Duration –OUT to GND ................ Indefinite Operating Temperature Range ...............–40 °C to +85°C Power Dissipation (TA ≤ 70°C) 6-Pin SOT-23A ..........................................240 mW Storage Temperature (Unbiased) ......... –65 °C to +150°C Lead Temperature (Soldering, 10 sec) ................. +300 °C *Static-sensitive device. Unused devices must be stored in conductive material. Protect devices from static discharge and static fields. Stresses above those listed under Absolute Maximum Ratings may cause perma- nent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to Absolute Maximum Rating Conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS: TA = –40 to +85 °C, VIN = +2.8V, C1 = C2 = 3.3µF , SHDN = GND, unless otherwise noted. Typical values are at TA = +25°C. Symbol Parameter Test Conditions Min Typ Max Units IDD Supply Current RLOAD = ∞ — 180 300 µA ISHDN Shutdown Supply Current SHDN = VIN — 0.1 1.0 µA VMIN Minimum Supply Voltage RLOAD = 1.0KΩ 2.5 — — V VMAX Maximum Supply Voltage RLOAD = 1.0KΩ — — 4.0 V FOSC Oscillator Frequency TA = –40 °C to +85°C — 160 — kHz FSW Switching Frequency TA = –40 °C to +85°C 40 80 125 kHz VIH Shutdown Input Logic High VIN = VMIN to VMAX 1.4 — — V VIL Shutdown Input Logic Low VIN = VMIN to VMAX — — 0.4 V PEFF Power Efficiency RLOAD = 1.0KΩ 86 93 — % VEFF Voltage Conversion RLOAD = ∞ 97.5 99.96 — % Efficiency ROUT Output Resistance RLOAD = 1.0KΩ —17 — Ω (Note 1) TA = –40°C to +85°C— — 30 NOTE: 1. Capacitor contribution is approximately 26% of the output impedance [ESR = 1 / pump frequency x capacitance)]. 2. Switching frequency is one-half internal oscillator frequency. PIN DESCRIPTION Pin No. (6-Pin SOT-23A) Symbol Description 1 VIN Power Supply Input. 2 GND Ground. 3 C – Commutation Capacitor Negative Terminal. 4 SHDN Shutdown Input (Active High). 5 OUT Doubled Output Voltage. 6 C+ Commutation Capacitor Positive Terminal. |
类似零件编号 - TC1240 |
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类似说明 - TC1240 |
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