LTC4075 LINER [Linear Technology], LTC4075 Datasheet
LTC4075
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LTC4075 Summary of contents
Page 1
... With power applied to both inputs, the LTC4075/LTC4075X can be put into shutdown mode reducing the DCIN supply current to 20µA, the USBIN supply current to 10µA, and the battery drain current to less than 2µ ...
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... 2.1k BAT TRIKL IUSB V Rising BAT Hysteresis From Low to High Hysteresis From Low to High Hysteresis ORDER PART NUMBER 10 DCIN LTC4075EDD 9 BAT LTC4075XEDD 8 IDC 7 USBPWR 6 ENABLE DD PART MARKING LBSC LBRK MIN TYP MAX UNITS ● 4.3 8 ● 4.3 8 ● 250 800 µA ● ...
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... Note 5: Supply current includes IUSB and ITERM pin current (approximately 100µA each) but does not include any current delivered to the battery through the BAT pin. Note 6: This parameter is not applicable to the LTC4075X. Note 7: Guaranteed by long term current density limitations. MIN ...
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... LTC4075/LTC4075X W U TYPICAL PERFOR A CE CHARACTERISTICS Regulated Output (Float) Voltage vs Charge Current 4. DCIN USBIN 4.24 4.22 4.20 4.18 4. 1.25k IDC IDC IUSB 4.14 4.12 4.10 0 100 200 300 400 500 600 700 800 CHARGE CURRENT (mA) 4075X G01 IUSB Pin Voltage vs Temperature (Constant-Current Mode) 1.008 1.006 1.004 1 ...
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... ENABLE = 0V 0 –50 – 100 TEMPERATURE (°C) 4075X G17 LTC4075/LTC4075X Charge Current vs Battery Voltage 1000 LTC4075X 800 600 400 200 DCIN USBIN LTC4075 θ = 40°C 1.25k IDC 0 2.4 2.7 3.0 3.3 3.6 3.9 4.2 V (V) BAT 4075X G12 ENABLE Pin Threshold (On-to-Off) vs Temperature 900 ...
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... LTC4075/LTC4075X W U TYPICAL PERFOR A CE CHARACTERISTICS Undervoltage Lockout Threshold vs Temperature 4.30 4.25 DCIN UVLO 4.20 4.15 4.10 4.05 USBIN UVLO 4.00 3.95 3.90 –50 – TEMPERATURE (°C) Battery Drain Current vs Temperature 4.2V BAT (NOT CONNECTED) DCIN USBIN –1 –50 – TEMPERATURE (°C) 6 Recharge Threshold vs Temperature 4 ...
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... LED. ⎯ C ⎯ H ⎯ R ⎯ G (Pin 5): Open-Drain Charge Status Output. When the LTC4075 is charging, the ⎯ C ⎯ H ⎯ R ⎯ G pin is pulled low by an internal N-channel MOSFET. When the charge cycle is completed, ⎯ C ⎯ H ⎯ R ⎯ G becomes high impedance. This output is capable of sinking up to 10mA, making it suitable for driving an LED ...
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... LTC4075/LTC4075X W BLOCK DIAGRA DCIN 1mA MAX 7 USBPWR 10mA MAX 4 PWR 10mA MAX CHRG 5 LOGIC RECHRG TRICKLE TERM 6 ENABLE R ENABLE TERMINATION *TRICKLE CHARGE DISABLED ON THE LTC4075X 8 10 CC/CV REGULATOR + DC – 4.15V SOFT-START DCIN UVLO + – BAT + 4.1V RECHARGE – BAT DC_ENABLE – *TRICKLE CHARGER CONTROL CHARGE 2 ...
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... Power Source Selection The LTC4075 can charge a battery from either the wall adapter input or the USB port input. The LTC4075 automati- cally senses the presence of voltage at each input. If both power sources are present, the LTC4075 defaults to the wall adapter source provided suffi ...
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... This ensures that the battery is kept at, or near, a fully charged condi- *Any external sources that hold the ITERM pin above 100mV will prevent the LTC4075 from terminating a charge cycle. 10 tion and eliminates the need for periodic charge cycle initiations ...
Page 11
... LED power is applied at either pin, the ⎯ P ⎯ W ⎯ R pin is high impedance, indicating that the LTC4075 lacks suffi cient power to charge the battery. The pull-down state is capable of sinking up to 10mA. The USB power status output (USBPWR) has two states: pull-down and high impedance ...
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... BAT because the LTC4075 automatically reduces the charge + current during high power conditions. The conditions ITERM that cause the LTC4075 to reduce charge current through R ITERM 1k thermal feedback can be approximated by considering the 1% power dissipated in the IC. Most of the power dissipation 4075 F03 is generated from the internal charger MOSFET ...
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... V ) • BAT BAT Example: An LTC4075 operating from a 5V wall adapter (on the DCIN input) is programmed to supply 800mA full-scale current to a discharged Li-Ion battery with a voltage of 3.3V. Assuming θ is 40°C/W (see Thermal Considerations), JA the ambient temperature at which the LTC4075 will begin ...
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... In other cases where the voltage drop must be kept low, a P-channel MOSFET can be used (as shown in Figure 5). 3455 F04 Figure 5. Low Loss Input Reverse Polarity Protection DRAIN-BULK DIODE OF FET LTC4075 WALL DCIN ADAPTER 4075 F05 4075Xf ...
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... ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE LTC4075/LTC4075X R = 0.115 0.38 ± 0.10 TYP 6 10 3.00 ± ...
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... LTC4411/LTC4412 Low Loss PowerPath ThinSOT and PowerPath are trademarks of Linear Technology Corporation Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● Full Featured Li-Ion Charger LTC4075 DCIN BAT USBIN 1k 1µF 1µF PWR IUSB CHRG IDC ITERM 1 ...