LTC4075X Linear Technology, LTC4075X Datasheet
LTC4075X
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LTC4075X 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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... R = 2.1k BAT TRIKL IUSB V Rising BAT Hysteresis From Low to High Hysteresis From Low to High Hysteresis www.DataSheet4U.com 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. www.DataSheet4U.com ...
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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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... USBIN USBIN 4.3V USBIN 5 ENABLE = 0V 0 –50 – 100 TEMPERATURE (°C) 4075X G17 LTC4075/LTC4075X www.DataSheet4U.com 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 ...
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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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... This should be bypassed with a 1μF capacitor. Exposed Pad (Pin 11): GND. The exposed backside of the package is ground and must be soldered to PC board ground for electrical connection and maximum heat transfer. LTC4075/LTC4075X IDC •1000 ...
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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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... R Device powered from wall adapter source The charge termination current threshold (I set by the following equation: ⎯ P ⎯ W ⎯ LOW USBPWR: LOW = R ITERM No charging ⎯ P ⎯ W ⎯ Hi-Z USBPWR: LOW LTC4075/LTC4075X www.DataSheet4U.com ) are calculated using the CHRG V 1000 − CHRG DC R − ...
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... The LTC4075X does not include the trickle charge feature; it outputs full charge current to the battery when the BAT pin voltage is below 2.9V. The LTC4075X is useful in applications where the trickle charge current may be insuffi cient to supply the load during low battery voltage conditions ...
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... DCIN POWER APPLIED ENABLE ENABLE DRIVEN HIGH DRIVEN LOW USBIN POWER DCIN POWER REMOVED OR REMOVED DCIN POWER Figure 1. LTC4075 State Diagram of a Charge Cycle LTC4075/LTC4075X www.DataSheet4U.com TRICKLE CHARGE MODE* BAT < 2.9V 1/10th FULL CURRENT CHRG STATE: PULLDOWN BAT > 2.9V CHARGE 2.9V < BAT MODE FULL CURRENT ...
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... LTC4075/LTC4075X U U APPLICATIO S I FOR ATIO Using a Single Charge Current Program Resistor The LTC4075 can program the wall adapter charge current and USB charge current independently using two program resistors, R and R . Figure 2 shows a charger circuit IDC IUSB that sets the wall adapter charge current to 800mA and the USB charge current to 500mA ...
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... LTC4075. Refer to Linear Technology Application Note 88, ° entitled “Ceramic Input Capacitors Can Cause Overvoltage 45 C Transients” for a detailed discussion of this problem. The ° long cable lengths of most wall adapters and USB cables LTC4075/LTC4075X www.DataSheet4U.com double sided 1oz copper board, the LTC4075 4075Xf 13 ...
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... LTC4075/LTC4075X U U APPLICATIO S I FOR ATIO makes them especially susceptible to this problem. To bypass the USB pin and the wall adapter input, add a 1Ω resistor in series with a ceramic capacitor to lower the effective Q of the network and greatly reduce the ringing. A tantalum, OS-CON, or electrolytic capacitor can be used in place of the ceramic and resistor, as their higher ESR reduces the Q, thus reducing the voltage ringing ...
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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 www.DataSheet4U.com R = 0.115 0.38 ± 0.10 TYP 6 10 3.00 ± ...
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... LTC4075/LTC4075X U TYPICAL APPLICATIO WALL ADAPTER USB POWER RELATED PARTS PART NUMBER DESCRIPTION LTC3455 Dual DC/DC Converter with USB Power Management and Li-Ion Battery Charger LTC4053 USB Compatible Monolithic Li-Ion Battery Charger LTC4054/LTC4054X Standalone Linear Li-Ion Battery Charger with Integrated Pass Transistor in ThinSOT ...