LTC4089-5 Linear Technology, LTC4089-5 Datasheet
LTC4089-5
Related parts for LTC4089-5
LTC4089-5 Summary of contents
Page 1
... The LTC4089 provides an adaptive output that tracks the battery voltage for high effi ciency charging from the high voltage input. The LTC4089-5 provides a fi xed 5V output from the high voltage input to charge single cell Li-Ion batteries. The charge current is programmable and an end-of-charge status output (CHRG) indicates full charge ...
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... LTC4089/LTC4089-5 www.DataSheet4U.com ABSOLUTE AXI U RATI GS (Notes Terminal Voltage BOOST ...................................................... –0.3V to 50V BOOST above SW .....................................................25V HVIN, HVEN .............................................. –0.3V to 40V IN, OUT, HVOUT t < 1ms and Duty Cycle < 1% .................. –0. ............................................................ –0. BAT .............................................................. –0. NTC, TIMER, PROG, CLPROG .......–0. CHRG, HPWR, SUSP, HVPR ......................... – ...
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... HVIN = 12V, BOOST = 17V 2k, SUSP = 0V, unless otherwise noted. CONDITIONS V Powers Part, Rising Threshold IN V Rising – V Falling IN IN Not Switching Shutdown; HVEN = 0V Assumes HVOUT to OUT Connection (LTC4089) Assumes HVOUT to OUT Connection (LTC4089-5) V Rising HVIN V > 3.95V HVOUT HVOUT (Note ...
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... Falling Threshold Hysteresis NTC Input Voltage to GND (Falling) Hysteresis Note 5: The LTC4089/LTC4089-5 are guaranteed to meet specifi ed performance from 0°C to 85°C and are designed, characterized and expected to meet these extended temperature limits, but are not tested at –40°C and 85°C. ...
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... IN 800 700 600 500 400 300 200 100 0 100 125 0 50 100 V (mV) FWD 40895 G05 LTC4089-5 High Voltage Regulator Effi ciency vs Output Load 100 HVIN = 8V 95 HVIN = 12V HVIN = 24V HVIN = 36V FIGURE 10 SCHEMATIC 4.21V (I ...
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... LTC4089/LTC4089-5 www.DataSheet4U.com TYPICAL PERFORMANCE CHARACTERISTICS High Voltage Regulator Maximum Load Current 10µH 1.6 1.5 TYPICAL 1.4 1.3 1.2 MINIMUM 1.1 1.0 0 (V) IN High Voltage Regulator Switch Frequency 800 780 760 740 720 700 680 660 640 620 600 –50 –25 75 100 TEMPERATURE (°C) High Voltage Switch Current Limit 2 ...
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... I BAT 0.5A/DIV 1ms/DIV 40895 G21 V = 3.85V BAT I = 100mA OUT R = 100k PROG 50mV/DIV 0.5A/DIV 20µS/DIV 40895 G24 LTC4089/LTC4089 25°C, unless otherwise specifi ed. A Response to HPWR HPWR 5V/DIV I IN 0.5A/DIV I BAT 0.5A/DIV 100µs/DIV 40895 G19 V = 3.85V BAT I ...
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... LTC4089 high voltage regulator will maintain just enough differential voltage between HVOUT and BAT to keep the battery charger MOSFET out of dropout (typically 300mV from OUT to BAT). The LTC4089-5 high voltage regula- tor will provide a fi xed 5V output to the battery charger MOSFET. HVOUT should be bypassed with at least 10µF to GND ...
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... PC board for is less than V OUT BAT proper functionality and for maximum heat transfer (use is kept greater than V , BAT several vias directly under the LTC4089). LTC4089/LTC4089 GND sets the timer period. The timer period is: C • R • 3 TIMER PROG ...
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... CHARGE CONTROL SOFT-START2 VOLTAGE DETECT UVLO BAT UV RECHRG NTCERR CONTROL LOGIC HOLD RESET 2µA GND SUSP PART NUMBER SET 3.6V LTC4089 5V LTC4089-5 V SET – – – 75mV (RISING) 25mV (FALLING) + – 4.25V (RISING) 3.15V (FALLING) – + 25mV CC/CV REGULATOR – + 25mV ...
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... HVPR pin allowing OUT to charge the battery and/or supply power to the application. The LTC4089 maintains approximately 300mV between the OUT pin and the BAT pin, while the LTC4089-5 provides a fi xed 5V output. Input Current Limit Whenever the input power path is enabled (i.e., SUSP = 0V and HVIN = 0V) and power is available at IN, power is delivered to OUT ...
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... OUT BAT R CLPROG The current limiting circuitry in the LTC4089/LTC4089-5 can and should be confi gured to limit current to 500mA for USB applications (selectable using the HPWR pin and programmed using the CLPROG pin 500 400 I LOAD 300 200 ...
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... This frequency foldback helps to control the regulator output current during start-up and overload. Ideal Diode from BAT to OUT The LTC4089/LTC4089-5 has an internal ideal diode as well as a controller for an optional external ideal diode battery is the only power supply available the load ...
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... However, if more conductance is needed, an external P-channel MOSFET can be added from BAT to OUT. The GATE pin of the LTC4089/LTC4089-5 drives the gate of the PFET for automatic ideal diode control. The source of the external MOSFET should be connected to OUT and the drain should be connected to BAT ...
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... U OPERATIO when the LTC4089/LTC4089-5 is powered from the IN pin, the programmed input current limit takes precedent over the charge current. In such a scenario, the charge current cannot exceed the programmed input current limit. For example, if typical 500mA charge current is required, calculate • ...
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... As the temperature drops, the resistance of the NTC thermistor rises. The LTC4089/ LTC4089-5 is designed to go into hold mode when the value of the NTC thermistor increases to 2.82 times the value This resistance is R NOM NTHS0603N02N1002J thermistor, this value is 28 ...
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... HVIN). Figure 5 shows an example of combining a 5V wall adapter and a USB power input. With its gate grounded by 1k, P-channel MOSFET MP1 provides USB power to the LTC4089/LTC4089-5 when 5V wall power is not available. When 5V wall power is available, D1 both supplies power to the LTC4089, pulls the gate of MN1 high ...
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... T494, Tantalum T495 Ceramic, POSCAP Alternate NTC Thermistors Polymer, Tantalum The LTC4089/LTC4089-5 NTC trip points were designed Ceramic to work with thermistors whose resistance-temperature Ceramic, TPS characteristics follow Vishay Dale’s “R-T Curve 2.” The Tantalum Series Vishay NTHS0603N02N1002J is an example of such a Ceramic thermistor ...
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... This is the value 121k NTC 14 R1 (see Figure 13.3k NTC R NTC 100k ] − − COLD HOT HOT LTC4089/LTC4089-5 is the value of the bias resistor, R NOM are the values the desired temperature NTC − COLD HOT = − 2 815 0 4086 . . − 100 k • ...
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... This example assumes 87% effi ciency 3.7V (V resulting in less than 0.5W total dissipation. If the LTC4089-5 is being powered from HVIN, the power dissipation can be estimated by calculating the regulator power loss from an effi ciency measurement and subtract- ing the catch diode loss. ...
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... Board Layout Considerations As discussed in the previous section critical that the exposed metal pad on the backside of the LTC4089/ LTC4089-5 package be soldered to the PC board ground. Furthermore, proper operation and minimum EMI requires a careful printed circuit board (PCB) layout. Note that large, switched currents fl the power switch (between the HVIN and SW pins), the catch diode and the HVIN input capacitor ...
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... LTC4089/LTC4089-5 www.DataSheet4U.com U U APPLICATIO S I FOR ATIO 36V 22µF 1M GND 50V 1% JP1 VIN 1000pF OFF 50V E3 USB 4.35V C5 TO 5.5V 4.7µF 6.3V JP2 CURRENT R2 1 1Ω USB 500mA 2 3 100mA E8 HPWR JP3 USB ON/OFF 1 OFF ...
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... R = 0.10 0.889 PACKAGE OUTLINE 0.25 ± 0.05 0.50 BSC 5.35 ± 0.05 (2 SIDES) 6.00 ±0.10 (2 SIDES 0.10 TYP 3.00 ±0.10 1.65 ± 0.10 (2 SIDES) (2 SIDES) 0.75 ±0.05 0.00 – 0.05 LTC4089/LTC4089 0.115 0.40 ± 0.05 TYP 0.889 12 22 0.889 11 1 0.25 ± 0.05 0.50 BSC 5.35 ± 0.10 (DJC) DFN 0605 (2 SIDES) BOTTOM VIEW—EXPOSED PAD PIN #1 NOTCH R0.30 TYP OR 0.25mm × 45° ...
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... LTC4089/LTC4089-5 www.DataSheet4U.com RELATED PARTS PART NUMBER DESCRIPTION Battery Chargers LTC1733 Monolithic Lithium-Ion Linear Battery Charger LTC1734 Lithium-Ion Linear Battery Charger in TM ThinSOT LTC4002 Switch Mode Lithium-Ion Battery Charger LTC4053 USB Compatible Monolithic Li-Ion Battery Charger LTC4054 Standalone Linear Li-Ion Battery Charger with Integrated Pass Transistor ...