LTC3416 Linear Technology, LTC3416 Datasheet
LTC3416
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LTC3416 Summary of contents
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... OPTI-LOOP sation allows the transient response to be optimized over a wide range of loads and output capacitors. The LTC3416 operates in forced continuous operation and provides tracking of another power supply rail. Forced continuous operation reduces noise and RF interference and provides excellent transient response ...
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... I = 300mA –300mA 0V 5.5V RUN IN temperature range are assured by design, characterization and correlation with statistical process controls. Note 3: The LTC3416 is tested in a feedback loop that adjusts V achieve a specified error amplifier output voltage (I www.DataSheet4U.com ORDER PART NUMBER 20 PGND LTC3416EFE ...
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... ELECTRICAL CHARACTERISTICS Note 4: Dynamic supply current is higher due to the internal gate charge being delivered at the switching frequency. Note calculated from the ambient temperature T J dissipation P as follows: D LTC3416E )(38 C/ TYPICAL PERFOR A CE CHARACTERISTICS V vs Temperature 3.3V REF IN 0.800 ...
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... LTC3416 W U TYPICAL PERFOR A CE CHARACTERISTICS Frequency vs Temperature 1090 V = 3.3V IN 1070 R = 294k OSC 1050 1030 1010 990 970 950 930 910 –40 – 100 120 60 TEMPERATURE ( C) 3416 G07 Efficiency vs Input Voltage OUT OUT 2.5 3.0 4.0 3.5 INPUT VOLTAGE (V) ...
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... FB Do not float this pin. RUN/SS (Pin 4): Run Control and Soft-Start Input. Forcing this pin below 0.5V shuts down the LTC3416. In shutdown all functions are disabled, drawing < supply current. A capacitor to ground from this pin sets the ramp time to full output current. ...
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... U OPERATIO Main Control Loop The LTC3416 is a monolithic, constant frequency, current mode step-down DC/DC converter. During normal opera- tion, the internal top power switch (P-channel MOSFET) is turned on at the beginning of each clock cycle. Current in the inductor increases until the current comparator trips and turns off the top power MOSFET ...
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... P-channel MOSFET and the inductor. www.DataSheet4U.com Low Supply Operation The LTC3416 is designed to operate down to an input supply voltage of 2.25V. One important consideration at low input supply voltages is that the R P-channel and N-channel power switches increases. The ...
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... LTC3416 U U APPLICATIO S I FOR ATIO The basic LTC3416 application circuit is shown in Figure 1a. External component selection is determined by the maxi- mum load current and begins with the selection of the operating frequency and inductor value followed by C and C . OUT Operating Frequency Selection of the operating frequency is a tradeoff between efficiency and component size ...
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... The resistive divider allows the V of the output voltage as shown in Figure 2. Voltage Tracking The LTC3416 allows the user to program how its output voltage ramps during start-up by means of the TRACK pin. Through this pin, the output voltage can be set up to either LTC3416 www ...
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... implement the coincident tracking shown in Figure 3a, connect an extra resistor divider to the output of V connect its midpoint to the TRACK pin of the LTC3416 as shown in Figure 4. The ratio of this divider should be selected the same as that of V implement the ratiometric sequencing in Figure 3b, no extra resistor divider is necessary. Simply connect the TRACK pin alternative method of tracking is shown in Figure 5 ...
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... LTC3416 SGND Figure 5. Dual Voltage System with Tracking Soft-Start The RUN/SS pin provides a means to shut down the LTC3416 as well as a timer for soft-start. Pulling the RUN/ SS pin below 0.5V places the LTC3416 in a low quiescent current shutdown state (I < 1 A). Q The soft-start gradually raises the clamp on I ...
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... TH tor shown in figure 1a will provide adequate compensation for most applications Design Example As a design example, consider using the LTC3416 in an application with the following specifications 1.8V, V OUT1 f = 1MHz. V and powering down. First, calculate the timing resistor: ...
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... TRACK OSC1 294k 5 18 SGND PGND PGND ITH1 10 11 5.9k PGND PGND C ITH1 680pF X7R 3416 F06 LTC3416 www.DataSheet4U.com – OUT2 2. OUT2 100 357k R4 78.7k R3 ...
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... SGND pin at one point which is then connected to the PGND pin close to the LTC3416. 2. Connect the (+) terminal of the input capacitor(s close as possible to the PV provides the AC current into the internal power MOSFETs. ...
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... BSC 0.195 – 0.30 (.0077 – .0118) 4. RECOMMENDED MINIMUM PCB METAL SIZE FOR EXPOSED PAD ATTACHMENT MILLIMETERS (INCHES) *DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.150mm (.006") PER SIDE LTC3416 www.DataSheet4U.com 6.40 – 6.60* (.252 – .260) 4.95 (.195 2.74 6 ...
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... Step-Down Regulator Tracking from 3.3V I/O Supply I/O SUPPLY IN1 100 174k RUN LTC3416 100k 17 19 PGOOD PGOOD TRACK OSC 294k 5 18 SGND PGND PGND 200k 10 ...