LTC4065-4.4 Linear Technology, LTC4065-4.4 Datasheet
LTC4065-4.4
Related parts for LTC4065-4.4
LTC4065-4.4 Summary of contents
Page 1
... The full-featured LTC4065-4.4 also includes automatic recharge, low-battery charge conditioning (trickle charg- ing) and soft-start (to limit inrush current). The LTC4065-4.4 is available in a tiny 6-lead, low profile (0.75mm) 2mm × 2mm DFN package. U 500mA + 4 ...
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... LTC4065-4 ABSOLUTE AXI U RATI GS (Note < 1ms and Duty Cycle < 1% ................. – 0. Steady State ........................................... – 0. BAT, CHRG ................................................. –0. EN, PROG ....................................... –0. BAT Short-Circuit Duration ...........................Continuous BAT Pin Current ................................................. 800mA PROG Pin Current ............................................... 800µA Junction Temperature (Note 6) ............................ 125°C Operating Temperature Range (Note 2) .. – ...
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... CHRG (Note 5) PROG I = 200mA BAT Note 4: Although the LTC4065-4.4 functions properly at 3.75V, full charge current requires an input voltage greater than the desired final battery voltage per the ∆V UVCL1 Note expressed as a fraction of measured full charge current C/10 with indicated PROG resistor. ...
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... LTC4065-4.4 W TYPICAL PERFOR A CE CHARACTERISTICS Battery Regulation (Float) Voltage vs Charge Current 4. 25° PROG 4.42 4.40 4.38 www.DataSheet4U.com 4.36 100 200 400 0 300 I (mA) BAT Charge Current vs Supply Voltage (Constant-Current Mode) 200 R = 10k PROG V = 3.8V 175 BAT T = 25°C A 150 125 100 ...
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... G13 Timer Accuracy vs Temperature –1 –2 –3 –4 –5 –6 –7 –50 – 100 TEMPERATURE (°C) 4065 G10 LTC4065-4.4 Manual Shutdown Supply Current vs Temperature 100 75 –50 – TEMPERATURE (°C) 4065 G11 ...
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... EN (Pin 5): Enable Input Pin. Pulling this pin above the manual shutdown threshold (V the LTC4065-4.4 in shutdown mode. In shutdown mode, the LTC4065-4.4 has less than 20µA supply current and less than 1µA battery drain current. Enable is the default state, but the pin should be tied to GND if unused. ...
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... CHRG R5 2 – 2.9V LOBAT + BAT ×1 SHUTDOWN D1 – MA 1.2V CA – 0.1V ENABLE PROG 6 R PROG Figure 1. LTC4065-4.4 Block Diagram LTC4065-4 – ×1000 3. – 1.2V CHARGE CONTROL R2 LOGIC COUNTER SHUTDOWN OSCILLATOR GND 1 UVLO BAT 3 + 4056 F01 406544f 7 ...
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... V (typically 0.82V). MS When the input voltage is not present, the battery drain current is reduced to less than 4µA. The LTC4065-4.4 can also be shut down by pulling the EN pin above the shutdown threshold voltage. Programming Charge Current The charge current is programmed using a single resistor from the PROG pin to ground ...
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... Shutdown Mode The LTC4065-4.4 can be disabled by pulling the EN pin above the shutdown threshold (approximately 0.82V). In shutdown mode, the battery drain current is reduced to less than 1µA and the supply current to about 20µA. ...
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... LTC4065-4 charge cycle. A high impedance state indicates that the charge current has dropped below 10% of the full-scale current, the timer has ended or the LTC4065-4.4 is disabled. Figure 2 shows the CHRG status under various conditions. www.DataSheet4U.com Charge Current Soft-Start and Soft-Stop The LTC4065-4 ...
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... IS V < 4.3V? BAT YES BAD BATTERY MODE RECHARGE MODE FULL CHARGE CURRENT CHRG STRONG PULL-DOWN < 3V 1/2 CHARGE CYCLE OR (2.25 HOURS) Figure 2. State Diagram of LTC4065-4.4 Operation LTC4065-4.4 UVLO MODE NO CHRG HIGH IMPEDANCE YES < 4.3V V > 4.3V BAT BAT STANDBY MODE NO CHARGE CURRENT CHRG HIGH IMPEDANCE ...
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... This feature is particularly useful if the LTC4065-4.4 is powered from a supply with long leads (or any relatively high output impedance). For example, USB-powered systems tend to have highly variable source impedances (due primarily to cable quality and length) ...
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... PROG pin and the filter capacitor to ensure stability. Power Dissipation The conditions that cause the LTC4065-4.4 to reduce charge current through thermal feedback can be approxi- mated by considering the power dissipated in the IC. For high charge currents, the LTC4065-4.4 power dissipation ...
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... LTC4065-4.4 package is soldered to the PC board ground. Correctly soldered to a 2500mm sided 1 oz. copper board the LTC4065-4.4 has a thermal resistance of approximately 60°C/W. Failure to make thermal contact between the Exposed Pad on the backside of the package and the copper board will result in thermal resistances far greater than 60° ...
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... Plastic DFN (2mm × 2mm) (Reference LTC DWG # 05-08-1703) 0.675 ±0.05 PACKAGE OUTLINE 0.25 ± 0.05 0.50 BSC 1.42 ±0.05 (2 SIDES 0.115 0.56 ± 0.05 (2 SIDES) 2.00 ±0.10 (4 SIDES) 0.75 ±0.05 BOTTOM VIEW—EXPOSED PAD 0.00 – 0.05 LTC4065-4.4 0.38 ± 0.05 TYP 4 6 PIN 1 CHAMFER OF EXPOSED PAD (DC6) DFN 1103 3 1 0.25 ± 0.05 0.50 BSC 1.37 ±0.05 (2 SIDES) 406544f 15 ...
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... LTC4065-4.4 RELATED PARTS PART NUMBER DESCRIPTION Battery Chargers LTC1734 Lithium-Ion Linear Battery Charger in ThinSOT LTC1734L Lithium-Ion Linear Battery Charger in ThinSOT LTC4002 Switch Mode Lithium-Ion Battery Charger LTC4050 Lithium-Ion Linear Battery Charger Controller LTC4052 Monolithic Lithium-Ion Battery Pulse Charger LTC4053 USB Compatible Monolithic Li-Ion Battery Charger www ...