LTC3603 Linear Dimensions Semiconductor, LTC3603 Datasheet
LTC3603
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LTC3603 Summary of contents
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... OPTI-LOOP compensation allows the transient response to be optimized over a wide range of loads and output capacitors. The LTC3603 can be confi gured for either Burst Mode op- eration or forced continuous operation. Forced continuous operation reduces noise and RF interference, while Burst Mode operation provides the high effi ...
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... Feedback Voltage Line Regulation FB(LINEREG) ΔV Feedback Voltage Load Regulation FB(LOADREG) 2 (Note 1) Operating Junction Temperature Range (Notes 0.3V) LTC3603E .............................................–40°C to 85°C IN –0.3V 6V) LTC3603I............................................ –40°C to 125° Lead Temperature (Soldering, 10 seconds) MSE Package .................................................... 300° BOOST ...
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... The LTC3603I is guaranteed over the –40°C to 125°C operating junction temperature range. Note 3: The LTC3603 is tested in a feedback loop that adjusts V achieve a specifi ed error amplifi er output voltage (I TYPICAL PERFORMANCE CHARACTERISTICS ...
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... LTC3603 www.DataSheet4U.com TYPICAL PERFORMANCE CHARACTERISTICS V vs Temperature REF 0.6006 V = 12V IN 0.6004 0.6002 0.6000 0.5998 0.5996 0.5994 –50 – TEMPERATURE (°C) PV Leakage Current IN vs Input Voltage RUN INPUT VOLTAGE (V) Frequency vs Temperature ...
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... INPUT VOLTAGE (V) 3603 G15 5V LDO Output Voltage vs Temperature 5.10 5.08 5.06 5.04 5.02 5.00 4.98 4.96 4.94 4.92 4.90 –50 – TEMPERATURE (°C) 3603 G18 LTC3603 Effi ciency vs Load Current, Burst Mode Operation 100 FIGURE 6 CIRCUIT 12V 100 0.001 0.01 0.1 LOAD CURRENT (A) 3603 G13 Effi ciency vs Frequency ...
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... LTC3603 www.DataSheet4U.com PIN FUNCTIONS MSE/UF Package INTV (Pin 1/Pin 3): Output of Internal 5V LDO. CC SYNC/MODE (Pin 2/Pin 4): Mode Select and External Clock Synchronization Input. PGOOD (Pin 3/Pin 5): Power Good Output. Open-drain logic output that is pulled to ground when the output volt- age is not within ±10% of regulation point. ...
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... Frequency Synchronization will disable Burst CC The internal oscillator of the LTC3603 can be synchronized to an external 5V clock connected to the SYNC/MODE pin. The frequency of the external clock can be in the range of 300kHz to 3MHz. For this application, the oscillator timing resistor should be chosen to correspond to a frequency that is 25% lower than the synchronization frequency ...
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... Overtemperature and PV Overvoltage Protection IN When using the LTC3603 in an application circuit, care must be taken not to exceed any of the ratings specifi the Ab- solute Maximum Ratings section added safeguard, however, the LTC3603 does incorporate an overtemperature shutdown feature. If the junction temperature reaches ap- proximately 150° ...
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... The operating frequency of the LTC3603 is determined by an external resistor that is connected between the RT pin and ground. The value of the resistor sets the ramp current that is used to charge and ...
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... The resistive divider allows the V ⎞ of the output voltage as shown in Figure 1. ⎠ ⎟ large enough to damage the part. IN ⎛ ⎞ • 1 ⎝ ⎜ ⎠ ⎟ pin to sense a fraction FB V OUT LTC3603 R1 SGND 3603 F01 Figure 1. Setting the Output Voltage 3603f ...
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... Frequency Synchronization can BURST The LTC3603’s internal oscillator can be synchronized to an external 5V clock signal. During synchronization, the top MOSFET turn-on is locked to the falling edge of the external frequency source. The synchronization frequency range is 300kHz to 3MHz. Synchronization only occurs if ...
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... SW 3603 F03 Figure 3. Topside MOSFET Supply Run and Soft-Start/Tracking Functions The LTC3603 has a low power shutdown mode which is controlled by the RUN pin. Pulling the RUN pin below 0.7V puts the LTC3603 into a low quiescent current shutdown mode (I < 1μA). When the RUN pin is greater than 0.7V, Q the controller is enabled ...
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... I Other losses, including C losses and inductor core losses, generally account for 2 R losses. less than 2% of the total power loss. LTC3603 operating current loss dominates the effi ciency loss 2 R loss dominates operating current comprises three components ground. The resulting dQ/dt is the current ...
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... where T is the ambient temperature example, consider the LTC3603 in dropout at an input voltage of 8V, a load current of 2.5A and an ambient temperature of 70°C. From the Typical Performance graph of Switch Resistance, the R DS(ON) is approximately 85mΩ. Therefore, power dissipated by the part is: ...
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... SGND pin at one point which is then connected to the PGND pin close to the LTC3603. 2. Connect the (+) terminal of the input capacitor(s), C close as possible to the PV the AC current into the internal power MOSFETs. ...
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... FB RUN SW TRACK/SS PGND R2 210k PGND PGND 1.2V, 2.5A Regulator at 750kHz, Burst Mode Operation SYNC/MODE INTV CC PGOOD OSC PV IN 143k RT BOOST R ITH 4.32k LTC3603 ITH RUN SW TRACK/SS PGND R2 105k PGND PGND V IN 12V C C VCC IN 1μF 22μ BST 0.22μF L1 1μ ...
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... Regulator, Synchronized to 1.8MHz, Small Size SYNC/MODE INTV CC PGOOD BOOST LTC3603 ITH RUN SW TRACK/SS PGND R2 332k PGND PGND LTC3603 Effi ciency vs Load Current, 1.2V Regulator at 750kHz, Burst Mode Operation 100 7. 12V 0.001 0.01 0.1 1 LOAD CURRENT (A) ...
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... LTC3603 www.DataSheet4U.com PACKAGE DESCRIPTION 2.845 0.102 (.112 .004) 5.23 (.206) MIN 0.305 0.038 (.0120 .0015) TYP RECOMMENDED SOLDER PAD LAYOUT 0.254 (.010) GAUGE PLANE 0.18 (.007) NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006" ...
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... UF Package 20-Lead Plastic QFN (4mm × 4mm) (Reference LTC DWG # 05-08-1710 Rev A) 0.70 0.05 2.45 0.05 PACKAGE OUTLINE 0.25 0.05 0.50 BSC 0.75 0.05 4.00 0.10 2.00 REF 0.200 REF 0.00 – 0.05 LTC3603 BOTTOM VIEW—EXPOSED PAD 0.115 TYP TYP 19 20 0.40 0. 2.45 0.10 2.45 0.10 (UF20) QFN 01-07 REV A ...
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