LTC3576EUFE-1#PBF Linear Technology, LTC3576EUFE-1#PBF Datasheet
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LTC3576EUFE-1#PBF
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LTC3576EUFE-1#PBF Summary of contents
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... QFN package. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. Bat-Track and PowerPath are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. ...
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... LEAD FREE FINISH TAPE AND REEL LTC3576EUFE#PBF LTC3576EUFE#TRPBF LTC3576EUFE-1#PBF LTC3576EUFE-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. For more information on lead free part marking, go to: For more information on tape and reel specifi ...
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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T otherwise noted. SYMBOL PARAMETER h Ratio of Measured V Current to CLPROG BUS (Note 4) CLPROG Program Current I V Current Available Before VOUT(POWERPATH) OUT Discharging Battery V CLPROG Servo ...
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LTC3576/LTC3576-1 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T otherwise noted. SYMBOL PARAMETER Overvoltage Protection V Overvoltage Protection Threshold OVCUTOFF V OVGATE Output Voltage OVGATE t OVGATE Time to Reach Regulation RISE Battery Charger V BAT Regulated Output ...
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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T otherwise noted. SYMBOL PARAMETER Always On 3.3V LDO Supply V Regulated Output Voltage LDO3V3 R Closed-Loop Output Resistance CL_LDO3V3 R Dropout Output Resistance OL_LDO3V3 Logic ( EN1, ...
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... Power-On Reset Time for Switching RST3 Regulator Burst Mode is a registered trademark of Linear Technology Corporation. Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime ...
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TYPICAL PERFORMANCE CHARACTERISTICS Ideal Diode V-I Characteristics 1.0 INTERNAL IDEAL DIODE WITH SUPPLEMENTAL EXTERNAL VISHAY 0.8 Si2333 PMOS 0.6 INTERNAL IDEAL DIODE ONLY 0.4 0 BUS 0 0 0.04 0.12 0.16 0.08 FORWARD VOLTAGE (V) 3576 G01 ...
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LTC3576/LTC3576-1 TYPICAL PERFORMANCE CHARACTERISTICS V Quiescent Current BUS vs V Voltage (Suspend) BUS BUS VOLTAGE (V) 3576 G10 Battery Charge Current vs V Voltage OUT 600 R = ...
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TYPICAL PERFORMANCE CHARACTERISTICS OTG Boost Quiescent Current vs V Voltage OUT 2.5 2.3 2.1 1.9 1.7 1.5 1.3 1.1 0.9 0.7 0.5 4.20 2.90 3.55 4.85 V (V) OUT 3576 G19 OTG Boost Effi ciency vs V Voltage OUT 95 ...
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LTC3576/LTC3576-1 TYPICAL PERFORMANCE CHARACTERISTICS Battery Charging from USB-HV BUCK-USB V OUT 1V/DIV AC COUPLED V BUS 100mV/DIV AC COUPLED V SW 5V/DIV 0V HVOK 5V/DIV 500μs/DIV BUS HV = 12V IN USING LT3653 OVP Connect Waveform ...
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TYPICAL PERFORMANCE CHARACTERISTICS 3.3V LDO Output Voltage vs Load Current BUS 3.4 BAT = 3.4V BAT = 3.9V, 4.2V BAT = 3.5V BAT = 3.6V 3.2 3.0 BAT = 3V 2.8 BAT = 3.1V BAT = 3.2V ...
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LTC3576/LTC3576-1 TYPICAL PERFORMANCE CHARACTERISTICS Switching Regulator Constant Frequency Quiescent Currents 8 SWITCHING 7 REGULATOR SWITCHING 3 REGULATORS – –40 35 TEMPERATURE (°C) 3576 G46 Switching Regulators 1, 2 Feedback ...
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PIN FUNCTIONS CLPROG (Pin 1): USB Current Limit Program and Monitor Pin resistor from CLPROG to ground determines the upper limit of the current drawn or sourced from the V pins. A precise fraction, h BUS CLPROG rent ...
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... I IN3 V (Pin 26): Bat-Track External Switching Regulator C Control Output. This pin drives the V Linear Technology step-down switching regulator 1μF MLCC OUT external P-channel MOSFET is sometimes required to provide power to V (see the Applications Information section). In concert with WALL and ACPR, it will regulate V charger effi ...
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PIN FUNCTIONS ACPR (Pin 28): External Power Source Present Output (Active Low). ACPR indicates that the output of the external high voltage step-down switching regulator is suitable for use by the LTC3576/LTC3576-1. It should be connected to the gate of ...
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LTC3576/LTC3576-1 BLOCK DIAGRAM OVSENS 6 OVP OVGATE BUS V 34 BUS CLPROG 1 NTCBIAS 3 BATTERY TEMPERATURE MONITOR NTC 4 CHRG 30 CHARGE STATUS I LIM DECODE LOGIC I 37 LIM0 I 38 LIM1 ENOTG 11 EN1 ...
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TIMING DIAGRAM SDA t SU,DAT t LOW SCL t t HIGH HD,STA START t r CONDITION WRITE PROTOCOL WRITE ADDRESS START SDA SCL ...
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LTC3576/LTC3576-1 OPERATION Introduction The LTC3576/LTC3576-1 are highly integrated power man- agement ICs designed to make optimal use of the power available from a variety of sources, while minimizing power dissipation and easing thermal budgeting constraints. They include a high effi ...
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OPERATION Bidirectional PowerPath Switching Regulator— Step-Down Mode The power delivered from BUS a 2.25MHz constant frequency bidirectional switching regulator operating in step-down mode. V combination of the external load (step-down switching regulators 1, 2 and 3) and ...
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LTC3576/LTC3576-1 OPERATION The input current limit is programmed by the pins or by the I C serial port. The input current limit LIM1 has fi ve possible settings ranging from the USB suspend limit of 500μA up ...
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OPERATION TO AUTOMOTIVE, FIREWIRE, ETC. OVERVOLTAGE PROTECTION OVSENS 6 – OVGATE USB BUS 35 CABLE V BUS 34 V BUS VOLTAGE CONTROLLER I /N SWITCH – CLPROG – 1.15V AVERAGE V ...
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LTC3576/LTC3576-1 OPERATION proaches this limit CLPROG servos to 1.15V and V rapidly When V is close to V OUT BUS be suffi cient negative slope on the inductor current when the PMOS switch balance ...
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OPERATION 2200 VISHAY Si2333 2000 OPTIONAL EXTERNAL 1800 IDEAL DIODE 1600 LTC3576/ 1400 LTC3576-1 1200 IDEAL DIODE 1000 800 600 ON SEMICONDUCTOR 400 MBRM120LT3 200 0 0 120 180 240 300 360 60 FORWARD VOLTAGE (mV) (BAT – V Figure ...
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LTC3576/LTC3576-1 OPERATION Likewise, the USB current limit programming will always be observed and only additional power will be available to charge the battery. When system loads are light, battery charge current will be maximized. Charge Termination The battery charger has ...
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OPERATION BAT < 2.85V CHARGE AT 100V/R (C/10 RATE) PROG RUN EVENT TIMER NO TIMER > 30 MINUTES YES INHIBIT CHARGING INDICATE BATTERY FAULT AT CHRG NO BAT > 2.85V YES Battery Charger Flow Chart POWER ON/ ENABLE CHARGER CLEAR ...
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LTC3576/LTC3576-1 OPERATION Each of the two faults has its own unique “blink” rate for human recognition as well as two unique duty cycles for machine recognition. The CHRG pin does not respond to the C/10 threshold if the LTC3576/LTC3576-1 is ...
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OPERATION Thermal Regulation To prevent thermal damage to the LTC3576/LTC3576-1 or surrounding components, an internal thermal feedback loop will automatically decrease the programmed charge current if the die temperature rises to 105°C. This thermal regulation technique protects the LTC3576/LTC3576-1 from ...
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LTC3576/LTC3576-1 OPERATION Byte Format Each byte sent to the LTC3576/LTC3576-1 must be eight bits long followed by an extra clock cycle for the acknowledge bit. The data should be sent to the LTC3576/LTC3576-1 with the most signifi cant bit (MSB) ...
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OPERATION Input Data Table 3 illustrates the four data bytes that may be written to the LTC3576/LTC3576-1. The fi rst byte at sub-address 0 controls the servo volt- age for switching regulators 1 and 2. The second byte at 2 ...
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LTC3576/LTC3576-1 OPERATION The third data byte at sub-address 2 controls the operating modes of each switching regulator as well as the input current limit settings. Each switching regulator can be independently set to one of three operating modes listed in ...
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OPERATION Step-Down Switching Regulators The LTC3576/LTC3576-1 contain three general purpose 2.25MHz step-down constant-frequency current mode switching regulators. Two regulators provide up to 400mA and a third switching regulator can provide up to 1A. All three switching regulators can be programmed ...
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LTC3576/LTC3576-1 OPERATION In Burst Mode operation, the switching regulator automati- cally switches between fi xed frequency PWM operation and hysteretic control as a function of the load current. At light loads, the regulator operates in hysteretic mode and uses a ...
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APPLICATIONS INFORMATION Bidirectional PowerPath Switching Regulator CLPROG Resistor and Capacitor Selection As described in the Bidirectional Switching Regula- tor—Step-Down Mode section, the resistor on the CLPROG pin determines the average V limit when the switching regulator is set to either ...
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LTC3576/LTC3576-1 APPLICATIONS INFORMATION There are MLCCs available with several types of dielectrics each having considerably different characteristics. For example, X7R MLCCs have the best voltage and tempera- ture stability. X5R MLCCs have apparently higher packing density but poorer performance over ...
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APPLICATIONS INFORMATION The inductor value also has an effect on Burst Mode op- eration. Lower inductor values will cause the Burst Mode operation switching frequency to increase. Table 8 shows several inductors that work well with the LTC3576/LTC3576-1’s general purpose ...
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LTC3576/LTC3576-1 APPLICATIONS INFORMATION MN1 USB/WALL ADAPTER C1 R1 Figure 6. Overvoltage Protection Figure 7. Dual-Input Overvoltage Protection It is possible to protect both V BUS overvoltage damage with several additional components, as shown ...
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APPLICATIONS INFORMATION capacitance on this pin must be kept to a minimum. With no additional capacitance on the PROG pin, the charger is stable with program resistor values as high as 25k. However, additional capacitance on this node reduces the ...
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LTC3576/LTC3576-1 APPLICATIONS INFORMATION The trip points for the LTC3576/LTC3576-1’s temperature qualifi cation are internally programmed at 0.349 • NTCBIAS for the hot threshold and 0.765 • NTCBIAS for the cold threshold. Therefore, the hot trip point is set when: R ...
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APPLICATIONS INFORMATION Hot Plugging and USB On-the-Go If there is more than 4. BUS enabled, the bidirectional switching regulator will not try to drive USB on-the-go is enabled and an external BUS supply is then ...
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LTC3576/LTC3576-1 APPLICATIONS INFORMATION LTC3576/ LTC3576-1 ENOTG ON-THE-GO TRANSCEIVER A DEVICE LTC3576/ LTC3576-1 ENOTG ON-THE-GO TRANSCEIVER B DEVICE down on-the-go A device and a powered down standard host. A suitable pulse can be generated because of the disparity in the bypass ...
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APPLICATIONS INFORMATION Figure 13. Higher Frequency Ground Current Follow Their Incident Path. Slices in the Ground Plane Create Large Loop Areas. The Large Loop Areas Increase the Inductance of the Path Leading to Higher System Noise the ideal diode of ...
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LTC3576/LTC3576-1 TYPICAL APPLICATIONS Minimum Parts Count USB Power Manager with Low-Battery Start-Up and USB On-the-Go USB ON-THE-GO 35 USB, WALL ADAPTER 34 C1 10μF 5 0805 0.1μF 3.01k 0402 2 12 1μF 30 ...
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TYPICAL APPLICATIONS High Effi ciency USB/Automotive Power Manager with Overvoltage Protection, Reverse-Voltage Protection, Low-Battery Start-Up and USB On-the-Go AUTOMOTIVE FIREWIRE, ETC. M1 150k 4.7μF 68nF 40.2k USB ON-THE-GO USB, M3 WALL M2 C1 ADAPTER 22μF 0805 R1 6.2k 100k R2 ...
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LTC3576/LTC3576-1 TYPICAL APPLICATIONS High Effi ciency USB/Automotive Power Manager with Overvoltage Protection, USB On-the-Go, Pushbutton Start, Automatic Supply Sequencing and 10 Second Push-and-Hold Hard Shutdown AUTOMOTIVE FIREWIRE, ETC. 4 4.7μF 150k 68nF 5 40.2k 10 USB ON-THE-GO USB ...
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TYPICAL APPLICATIONS High Effi ciency USB/Automotive Power Manager with Current Limiting and Overvoltage Protection on Both Inputs, Low-Battery Start-Up and USB On-the-Go AUTOMOTIVE 7.5V TO 36V FIREWIRE, ETC. TRANSIENTS TO 60V 1 4.7μF 34.2k 3 USB ON-THE-GO USB ...
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LTC3576/LTC3576-1 TYPICAL APPLICATIONS High Effi ciency USB/Wall Power Manager with Dual Overvoltage Protection, Reverse-Voltage Protection, Low-Battery Start-Up and USB On-The-Go 5V WALL ADAPTER M3 M1 USB ON-THE-GO USB 22μF 0805 R1 6.2k 100k 100k ...
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... 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. UFE Package 38-Lead Plastic QFN (4mm × ...
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... Voltage (LTC4098-1), 4mm × 3mm 14-Pin DFN Package www.linear.com ● 4.7μH 0.47μF 8 22μ 3.3μ OTHER LOADS 33 C2 22μF 32 0805 + Li-Ion 3.01k 0.1μF 1k 0402 3576 TA06 LT 0809 REV B • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2008 3576fb ...