LTC3559EUD#PBF Linear Technology, LTC3559EUD#PBF Datasheet
LTC3559EUD#PBF
Specifications of LTC3559EUD#PBF
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LTC3559EUD#PBF Summary of contents
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... The LTC3559/LTC3559-1 are offered in a low profi le ther- mally enhanced 16-lead (3mm × 3mm) QFN package. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners 500mA ...
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... Operating Temperature Range (Note 3).... –40°C to 85°C Storage Temperature .............................. –65°C to 125°C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC3559EUD#PBF LTC3559EUD#TRPBF LTC3559EUD-1#PBF LTC3559EUD-1#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based fi nish parts. ...
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ELECTRICAL CHARACTERISTICS range, otherwise specifi cations are at T SYMBOL PARAMETER ΔV Differential Undervoltage Lockout DUVLO Hysteresis V PROG Pin Servo Voltage PROG h Ratio PROG Pin Current PROG BAT I Trickle Charge Current TRKL V Trickle ...
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LTC3559/LTC3559-1 ELECTRICAL CHARACTERISTICS range, otherwise specifi cations are at T SYMBOL PARAMETER V Feedback Voltage Input Current FB D Maximum Duty Cycle MAX PMOS PMOS DS(ON NMOS NMOS DS(ON ...
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TYPICAL PERFORMANCE CHARACTERISTICS Battery Charge Current vs Supply Voltage 500 495 HPWR = 5V 490 R = 1.74k PROG EN1 = EN2 = 0V 485 480 475 470 465 460 455 450 445 440 4.3 4.4 ...
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LTC3559/LTC3559-1 TYPICAL PERFORMANCE CHARACTERISTICS CHRG Pin Output Low Voltage vs Temperature 140 5mA CHRG 120 100 –55 –35 – TEMPERATURE (°C) 3559 G13 Timer Accuracy ...
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TYPICAL PERFORMANCE CHARACTERISTICS Buck Regulator Enable Thresholds vs Temperature 1200 PV = 3.8V IN 1100 1000 900 800 RISING 700 FALLING 600 500 400 25 45 –55 –35 – 105 TEMPERATURE (°C) 3559 G22 Buck Regulator Effi ...
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LTC3559/LTC3559-1 TYPICAL PERFORMANCE CHARACTERISTICS Buck Regulator Start-Up Transient V OUT 500mV/DIV INDUCTOR CURRENT I = 200mA/DIV L EN 2V/DIV PV = 3.8V 50μs/DIV IN PULSE SKIP MODE LOAD = 6Ω Buck Regulator Burst Mode Operation V OUT 20mV/DIV (AC) SW ...
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PIN FUNCTIONS GND (Pin 1): Ground, Connect to Exposed Pad (Pin 17). BAT (Pin 2): Charge Current Output. Provides charge cur- rent to the battery and regulates fi nal fl oat voltage to 4.2V (LTC3559) or 4.1V (LTC3559-1). MODE (Pin ...
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LTC3559/LTC3559-1 BLOCK DIAGRAM CHRG 15 HPWR 12 SUSP 11 NTC 13 MODE 3 EN1 5 UNDERVOLTAGE EN2 9 FB1 4 DIE TEMPERATURE BANDGAP OSCILLATOR 2.25MHz FB2 BAT IN BODY MAXER CA TA LOGIC T ...
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OPERATION The LTC3559/LTC3559-1 are linear battery chargers with dual monolithic synchronous buck regulators. The buck regulators are internally compensated and need no external compensation components. The battery charger employs a constant- current/constant- voltage charging algorithm and is capable of charging ...
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LTC3559/LTC3559-1 APPLICATIONS INFORMATION Suspend Mode The battery charger can also be disabled by pulling the SUSP pin above 1.2V. In suspend mode, the battery drain current is reduced to 1.5μA and the input current is reduced to 8.5μA. Charge Cycle ...
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APPLICATIONS INFORMATION In any mode, the actual battery current can be determined by monitoring the PROG pin voltage and using the follow- ing equation: PROG = I • 800 BAT R PROG Thermal Regulation To prevent thermal damage to the ...
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LTC3559/LTC3559-1 APPLICATIONS INFORMATION NTC Thermistor The battery temperature is measured by placing a nega- tive temperature coeffi cient (NTC) thermistor close to the battery pack. The NTC circuitry is shown in Figure 3. To use this feature, connect the NTC ...
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APPLICATIONS INFORMATION Alternate NTC Thermistors and Biasing The battery charger provides temperature qualifi ed charging if a grounded thermistor and a bias resistor are connected to the NTC pin. By using a bias resistor whose value is equal to the ...
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LTC3559/LTC3559-1 APPLICATIONS INFORMATION Solving these equations for R NTC|COLD results in the following 0.536 • R NTC|HOT NOM and R = 3.25 • R NTC|COLD NOM By setting R equal to R25, the above equations result NOM in ...
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APPLICATIONS INFORMATION Power Dissipation The conditions that cause the LTC3559/LTC3559-1 to reduce charge current through thermal feedback can be approximated by considering the power dissipated in the IC. For high charge currents, the LTC3559/LTC3559-1 power dissipation is approximately ...
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LTC3559/LTC3559-1 APPLICATIONS INFORMATION Average, rather than instantaneous, battery current may be of interest to the user. For example switching power supply operating in low-current mode is connected in parallel with the battery, the average current being pulled out ...
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APPLICATIONS INFORMATION most applications. Experimentation with capacitor sizes between 2pF and 22pF may yield improved transient response if so desired by the user. Buck Switching Regulator Operating Modes The step-down switching regulators include two possible operating modes to meet the ...
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LTC3559/LTC3559-1 APPLICATIONS INFORMATION leakage pulled to ground through a 10k resistor on the switch (SW1 or SW2) pin when in shutdown. Buck Switching Regulator Dropout Operation It is possible for a step-down switching regulator’s input voltage to approach its programmed ...
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APPLICATIONS INFORMATION Table 2 Recommended Inductors INDUCTOR TYPE L (μH) DB318C 4.7 3.3 D312C 4.7 3.3 DE2812C 4.7 3.3 CDRH3D16 4.7 3.3 CDRH2D11 4.7 3.3 CLS4D09 4.7 SD3118 4.7 3.3 SD3112 4.7 3.3 SD12 4.7 3.3 SD10 4.7 3.3 LPS3015 ...
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LTC3559/LTC3559-1 TYPICAL APPLICATIONS The Output Voltage of a Buck Regulator Is Programmed for 3.3V. When BAT Voltage Approaches 3.3V, the Regulator Operates in Dropout and the Output Voltage Will Be BAT – 3-Resistor Bias Network for NTC Sets ...
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... SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights ...
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... Li-Ion Battery Charger LTC3456 2-Cell, Multi-Output DC/DC Converter with USB Power Manager LTC4080 500mA Standalone Charger with 300mA Synchronous Buck Hot Swap is a trademark of Linear Technology Corporation. Linear Technology Corporation 24 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...