LT1304-5.0V UTC, LT1304-5.0V Datasheet
LT1304-5.0V
Related parts for LT1304-5.0V
LT1304-5.0V Summary of contents
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT MICROPOWER DC/DC CONVERTERS WITH LOW-BATTERY DETECTOR ACTIVE IN SHUTDOWN DESCRIPTION The UTC LT1304 is a micropower step-up DC/DC converter ideal for use in small, low voltage, battery-operated systems. The devices operate from a wide input supply range of 1.5V to 8V. The UTC LT1304-3.3 and LT1304-5.0 generate regulated outputs of 3 ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS PARAMETER Input Voltage SW Voltage FB Voltage(LT1304) I Voltage(LT1304-3.3/LT1304-5.0) LIM SHDN Voltage LBI Voltage LBO Voltage Maximum Power Dissipation Junction Temperature Operating Temperature Range Storage Temperature Range Lead Temperature (soldering,10sec) ELECTRICAL CHARACTERISTICS PARAMETER Minimum Operating Voltage ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT PARAMETER Switch Leakage The * denotes specifications which apply over the 0 PIN FUNCTIONS PIN No. SYMBOL Low Battery Detector Input. When voltage on this pin is less than 1 LBI 1.17V,detector output is low Low Battery Detector Output. Open collector can sink up to 500µA.Low ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT TYPICAL PERFORMANCE CHARACTERISTICS Switch Saturation Voltage 500 Ta =25 ℃ 400 300 200 100 0 0 0.2 0.4 0.6 Switch Current (A) O n-and O ff-times 8 7 Maximum O n-Time ff-T ime -50 - Temperature( Feedback Pin Bias Current ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT Load Transient Response V OUT 100mV / DIV AC COUPLED I LOAD 200mA 0 100 μ DIV BLOCK DIAGRAMS LBO 2 LBI 1.17V ENABLE 1.24V VREF Figure 1. LT1304 Block Diagram. Independent Low-Battery Detector A3 Remains Alive When Device Is in Shutdown UTC UNISONIC TECHNOLOGIES CO ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT 1 LBI 1.17V R3 590K - R4 + 1.24V VREF R4=355K (LT1304-3.3V) R4=195K (LT1304-5.0V) Figure 2. LT1304-3.3/LT1304-5.0 Block Diagram OPERATION The LT1304 operation can best be understood by examining the block diagram in Figure 1.Comparator A1monitors the output voltage via resistor divider string R3/R4 at the FB pin. When V and the timers are turned off. Only the reference, A1 and A3 consume current, typically 120µ ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT DCR is important for best efficiency. Ideally, the inductor DCR should be less than 0.05W, although the physical size of such an inductor makes its use prohibitive in many space conscious applications. If EMI is a concern, such as when sensitive analog circuitry is present, a toroidal inductor such as the Coiltronics CTX20-1 is suggested. ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT V OUT 2V/DIV I IN 500mA/DIV V SHDN 10V/DIV Figure 3. Start-Up Response.Input Current Rises Quickly to 1A. VOUT Reaches 5V in Approximately 1ms.Output Drives 20mA Load + 100 μ CELLS *SUMIDA CD54-220 Figure4.2-Cell to 5V/200mA Boost Converter Takes Four External Parts.Components with Dashed Lines Are for ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT V OUT 2V/DIV I IN 500mA/DIV V SHDN 10V/DIV Figure 5. Start-Up Response with 1μF/1MΩComponents in Figure 2 Added. Input Current Is More Controlled. V Reaches 5V in6ms.Output Drives 20mA Load. 1000 900 800 700 600 500 400 10 LAYOUT/INPUT BYPASSING The LT1304 high speed switching mandates careful attention to PC board layout. Suggested component place-ment is shown in Figure 7 ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT OUT GND (BATTERY AND LOAD RETURN) Figure 7. Suggested Layout for Best Performance.Input Capacitor Placement as Shown Is Highly Recommended.Switch Trace (pin 4) Copper Area Is Minimized Low-Battery Detector The LT1304 contains an independent low-battery detector that remains active when the device is shut down. This detector, actually a hysteretic comparator, has an open collector output that can sink up to 500µ ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT B1 2 CELLS + C1 100μF Figure9.2-cell to 5V Converter Used in Battery Life Study 1000 100 Figure 10. Battery Life vs Current.Dots Specify UTC UNISONIC TECHNOLOGIES CO., LTD 22μH VIN SW SHDN SENSE LT1304-5.0 LBI IBO ILIM GND 200 ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT Figure 11. Output Wall Hours vs Load Current. Note Rapid Fall-Off at Higher Discharge Rates Figure 11’s graph varies significantly from electrical efficiency plot pictured on the first page of this data sheet. Why? As more current is drawn from the battery, voltage drop across the cells’ internal impedance increases. This causes internal power loss (heating), reducing cell terminal voltage ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT 100 Figure 12. Overall System Efficiency Including Battery Efficiency vs Load Current.Internal lmpedance of Alkaline AA Cells Accounts for Rapid Drop in Efficiency at Higher Load Current TYPICAL CHARACTERISTICS Super Burst Low DC/DC Converter I Q 〜 IQ〜10 μA 33 μ H 〜 200K 2N3906 ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT 2-Cell to 3.3V Boost Converter 22μ 100μ CELLS LT130-3.3 SHDN I LIM SHUTDOWN NC 3.3V SEPIC Efficiency(Step-Up/Step-Down Converter) L1A VIN 2 2. VIN 47 μF 16V LT1304-3.3 SENSE SHDN SHUTDOWN I LIM SPEC (Step-Up/Step-Down Converter) L1A ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT 5V to 12V DC/DC Converter L1 22 μH 5V VIN SW + 47μF LT1304 SHDN SHUTDONW GND Single Li-lon Cell to 5V Converter with Load Disconnect at Vin＜2.7V 562k + 100μF 220k 1% NC SINGLE LI-ION 432k CELL 1% UTC UNISONIC TECHNOLOGIES CO., LTD. ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT Negative LCD Bias Generator L1* 10μH VIN LT1304 47μ CELLS ILIM GND 22K VOLTAGE ADJUST 1kHz PWM INPUT Electroluminescent Panel Driver with 200Hz Oscillator VIN 5V=OPERATE 0V=SHUTDOW N 22K 2N3906 + 75K 3.3K UTC UNISONIC TECHNOLOGIES CO ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT 47μ 0.1μF LT1304 SHUTDOWN SHDN I LIM Cell to 5V Converter with Output Disconnect 47μF SHUTDOWN UTC UNISONIC TECHNOLOGIES CO., LTD. 2-to 4-Cell to 1kV Step-Up Converter 0.01μF 0.01μF 0.01μ 0.01μ ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT 2- Cell to 5V Converter with Auxiliary 10V Output + 100μ 2CELLS F SHUTDOWN 2- Cell to 5V Converter with Auxiliary -5V Output + 100 μ CELLS SHUTDOWN UTC UNISONIC TECHNOLOGIES CO., LTD. MBR0530 + 1μF CERAMIC L1 MBR0530 22μH MBRS130L SENSE LT1304-5.0 ...
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... UTC LT1304/LT1304-3.3V/LT1304-5.0V LINEAR INTEGRATED CIRCUIT UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein ...