LTC3567EUF#TRPBF Linear Technology, LTC3567EUF#TRPBF Datasheet

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... QFN surface mount package. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PowerPath and Bat-Track are a trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6522118 and 6404251. ...

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... ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC3567EUF#PBF LTC3567EUF#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 3.01k, unless otherwise noted. CLPROG SYMBOL PARAMETER I V Current Available Before OUT (POWERPATH) OUT Loading BAT V CLPROG Servo Voltage in Current CLPROG Limit V V Undervoltage ...

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LTC3567 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are 3.01k, unless otherwise noted. CLPROG SYMBOL PARAMETER R Battery Charger Power FET On ON_CHG Resistance (Between V OUT BAT) T Junction Temperature in Constant LIM Temperature Mode ...

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... Pull-Down in Shutdown VOUT1 OUT1 D Maximum Buck Duty Cycle BUCK(MAX) D Maximum Boost Duty Cycle BOOST(MAX) t Soft-Start Time SS1 Burst Mode is a registered trademark of Linear Technology Corporation. l The denotes the specifi cations which apply over the full operating = 25° 5V 3.8V BUS IN1 OUT1 ...

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LTC3567 ELECTRICAL CHARACTERISTICS 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. Note 2: The LTC3567E ...

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TYPICAL PERFORMANCE CHARACTERISTICS PowerPath Switching Regulator Effi ciency vs Output Current 100 BAT = 3.8V 5x, 10x MODE 1x MODE 0.01 0.1 OUTPUT CURRENT (A) 3567 G07 Output Voltage vs Load Current in Suspend ...

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LTC3567 TYPICAL PERFORMANCE CHARACTERISTICS Oscillator Frequency vs Temperature 2.6 2.4 BAT = 3. BUS BUS 2.2 BAT = BUS 2.0 BAT = 2. BUS 1.8 –40 –15 ...

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TYPICAL PERFORMANCE CHARACTERISTICS Buck-Boost Regulator PWM Mode Effi ciency 100 90 BURST MODE 80 OPERATION PWM MODE 70 CURVES CURVES IN1 IN1 V = 3.6V IN1 V = 3.6V IN1 ...

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LTC3567 PIN FUNCTIONS until it re-enters the valid range. A low drift bias resistor is required from V to NTC and a thermistor is required BUS from NTC to ground. If the NTC function is not desired, the NTC pin ...

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PIN FUNCTIONS CHRGEN (Pin 23): Logic Input. This logic input pin in- dependently enables the battery charger. Active low. Has a 1.6μA internal pull-down current source. This pin is logically ORed with its corresponding bit in the I EN1 (Pin ...

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LTC3567 TIMING DIAGRAM ADDRESS START SDA SCL SDA t LOW SCL t t HD, STA START t r CONDITION ...

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OPERATION set to exceed the allowable USB current, the USB specifi ca- tion will not be violated. The switching regulator will limit the average input current so that the USB specifi cation is never violated. Furthermore, load current at V ...

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LTC3567 OPERATION chip P-channel MOSFET transistor whenever the voltage approximately 15mV (V OUT FWD BAT. The resistance of the internal ideal diode is approxi- mately 180mΩ. If this is suffi cient for the application, then no external ...

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OPERATION Battery Charger The LTC3567 includes a constant-current/constant-volt- age battery charger with automatic recharge, automatic termination by safety timer, low voltage trickle charging, bad cell detection and thermistor sensor input for out-of- temperature charge pausing. Battery Preconditioning When a battery ...

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LTC3567 OPERATION microprocessor. An open-drain output, the CHRG pin can drive an indicator LED through a current limiting resistor for human interfacing or simply a pull-up resistor for mi- croprocessor interfacing. To make the CHRG pin easily recognized by both ...

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OPERATION to approximately 0°C. The hot and cold comparators each have approximately 3°C of hysteresis to prevent oscillation about the trip point. Grounding the NTC pin disables the NTC charge pausing function. Thermal Regulation To optimize charging time, an internal ...

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LTC3567 OPERATION 2 Table Serial Port Mapping (Defaults 0xFF00 in Reset State Reserved for Internal Switching Regulator Use Voltage (See Table 4) Table 3. USB Current Limit Settings ...

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OPERATION Buck-Boost DC/DC Switching Regulator The LTC3567 contains a 2.25MHz constant-frequency volt- age mode buck-boost switching regulator. The regulator provides output load current. The buck-boost can be programmed to a minimum output voltage of 2.75V and ...

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LTC3567 OPERATION Burst Mode operation is 50mA. The buck-boost regulator will not go to sleep if the current is greater than 50mA, and if the load current increases beyond this point while in Burst Mode operation the output will lose ...

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APPLICATIONS INFORMATION V and V Bypass Capacitors BUS OUT The style and value of capacitors used with the LTC3567 determine several important parameters such as regulator control-loop stability and input voltage ripple. Because the LTC3567 uses a step-down switching power ...

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LTC3567 APPLICATIONS INFORMATION Table 7. Recommended Inductors for Buck-Boost Regulator MAX MAX INDUCTOR L I DCR SIZE TYPE (μH) (A) (Ω) (L × W × H) LPS4018 3.3 2.2 0.08 3.9 × 3.9 × 1.7 2.2 2.5 ...

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APPLICATIONS INFORMATION R = Value of thermistor at the hot trip point NTC|HOT r = Ratio R25 COLD NTC|COLD r = Ratio R25 HOT NTC|HOT R = Primary thermistor bias resistor (see Figure 4a) ...

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LTC3567 APPLICATIONS INFORMATION LTC3567 V V BUS BUS NTC BLOCK 0.765 • V BUS R – NOM 100k NTC + 3 R NTC 100k – 0.349 • V BUS + + – 0.017 • V BUS ( best ...

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APPLICATIONS INFORMATION A simple Type I compensation network (as shown in Figure 6) can be incorporated to stabilize the loop but at the cost of reduced bandwidth and slower transient re- sponse. To ensure proper phase margin, the loop must ...

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LTC3567 APPLICATIONS INFORMATION the Exposed Pad on the backside of the package and the copper board will result in higher thermal resistances. Furthermore, due to its high frequency switching cir- cuitry imperative that the input capacitors, induc- tors, ...

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... RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 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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... Maximum Charge Current, 180mΩ Ideal Diode with <50mΩ Option, Automatic Charge Current Reduction Maintains 3.6V Minimum V when all Logic Inputs are Grounded, 3mm × 4mm DFN-14 Package www.linear.com ● , Battery Charger Disabled OUT 3567f LT 0608 • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2008 ...