ltc3602 Linear Technology Corporation, ltc3602 Datasheet
ltc3602
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ltc3602 Summary of contents
Page 1
... OPTI-LOOP compensation allows the transient response to be optimized over a wide range of loads and output capacitors. The LTC3602 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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... LTC3602EFE#PBF LTC3602EFE#TRPBF LTC3602IFE#PBF LTC3602IFE#TRPBF LTC3602EUF#PBF LTC3602EUF#TRPBF LTC3602IUF#PBF LTC3602IUF#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. Consult LTC Marketing for information on non-standard lead based fi nish parts. ...
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... Specifi cations over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. Note 3: The LTC3602 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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... LTC3602 TYPICAL PERFORMANCE CHARACTERISTICS V vs Temperature REF 0.6008 V = 8.4V IN 0.6006 0.6004 0.6002 0.6000 0.5998 0.5996 –50 – 100 TEMPERATURE (°C) 3602 G03 PV Leakage Current IN vs Input Voltage RUN INPUT VOLTAGE (V) 3602 G06 ...
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... INPUT VOLTAGE (V) 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. –50 – TEMPERATURE ( C) LTC3602 Effi ciency vs Load Current, Burst Mode Operation 100 FIGURE 6 CIRCUIT 0.01 0.1 90 100 LOAD CURRENT (A) 3602 G13 Effi ciency vs Frequency 100 FIGURE 6 CIRCUIT ...
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... LTC3602 PIN FUNCTIONS FE/UF Package SYNC/MODE (Pin 1/Pin 4): Mode Select and External Clock Synchronization Input. PGOOD (Pin 2/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. R (Pin 3/Pin 6): Frequency Set Pin. ...
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... Frequency Synchronization will disable Burst CC The internal oscillator of the LTC3602 can be synchronized to an external 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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... MOSFET will be held off and switching cycles will be skipped until the inductor current is reduced. 8 Overtemperature Protection When using the LTC3602 in an application circuit, care must be taken not to exceed any of the ratings speci- fi the Absolute Maximum Ratings section added safeguard, however, the LTC3602 does incorporate an overtemperature shutdown feature. If the junction temperature reaches approximately 150° ...
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... Operation at lower frequencies improves effi ciency by reducing internal gate charge and switching losses but requires larger inductance values and/or capacitance to maintain low output ripple voltage. The operating frequency of the LTC3602 is determined by an external resistor that is connected between the R pin and ground. The value of the T ...
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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 LTC3602 R1 SGND 3602 F01 Figure 1. Setting the Output Voltage 3602f ...
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... R resistor to ensure that adequate slope compensation present. When synchronized, the LTC3602 will operate in pulse-skipping mode. INTV Regulator CC The LTC3602 features an integrated P-channel low dropout ...
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... SW 3602 F03 Figure 3. Topside MOSFET Supply Run and Soft-Start/Tracking Functions The LTC3602 has a low power shutdown mode which is controlled by the RUN pin. Pulling the RUN pin below 0.7V puts the LTC3602 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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... R Loss = I Other losses, including C losses and inductor core losses, generally account for 2 R losses. less than 2% of the total power loss. LTC3602 2 R loss dominates operating current comprises three components: to ground. The resulting dQ/dt is the current that is typically larger than the DC bias CC = f(9 ...
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... where T is the ambient temperature example, consider the LTC3602 in dropout at an input voltage of 8V, a load current of 2.5A and an ambi- ent temperature of 70°C. From the Typical Performance graph of Switch Resistance, the R DS(ON) at 70°C is approximately 120mΩ. Therefore, power dis- sipated by the part is: ...
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... SGND pin at one point which is then connected to the PGND pin close to the LTC3602. 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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... C : TAIYO YUDEN TMK325BJ226MM TAIYO YUDEN AMK316BJ107ML OUT: 16 1.8V, 2.5A Regulator at 1MHz, Burst Mode Operation 1 16 SYNC/MODE INTV PGOOD BOOST LTC3602EUF RUN TRACK/SS PGND 8 9 PGND PGND Effi cinecy vs Load Current 100 ...
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... PGOOD BOOST LTC3602EUF RUN TRACK/SS PGND 8 9 PGND PGND LTC3602 V IN 10V C C VCC IN 1μF 22μ BST 0.22μF L1 1μH V OUT 3.3V 2.5A C OUT 47μF 3602 TA04 VCC IN 1μF 22μ ...
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... LTC3602 PACKAGE DESCRIPTION 6.60 ±0.10 4.50 ±0.10 SEE NOTE 4 RECOMMENDED SOLDER PAD LAYOUT 4.30 – 4.50* (.169 – .177) 0.09 – 0.20 (.0035 – .0079) (.020 – .030) NOTE: 1. CONTROLLING DIMENSION: MILLIMETERS 2. DIMENSIONS ARE IN 3. DRAWING NOT TO SCALE 18 FE Package 16-Lead Plastic TSSOP (4.4mm) (Reference LTC DWG # 05-08-1663) Exposed Pad Variation BA 2 ...
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... UF Package 20-Lead Plastic QFN (4mm × 4mm) (Reference LTC DWG # 05-08-1710) 0.70 ±0.05 PACKAGE OUTLINE 0.25 ±0.05 0.50 BSC 0.75 ± 0.05 2.45 ± 0.10 (4-SIDES) 0.200 REF 0.00 – 0.05 LTC3602 BOTTOM VIEW—EXPOSED PAD PIN 1 NOTCH R = 0.115 R = 0.30 TYP TYP 19 20 0.38 ± 0. (UF20) QFN 10-04 0.25 ± 0.05 ...
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... LTC3602 RELATED PARTS PART NUMBER DESCRIPTION LTC1877 600mA (I ), 550kHz, Synchronous Step-Down DC/DC Converter OUT LTC1879 1. 550kHz, Synchronous Step-Down DC/DC Converter OUT LTC3404 600mA (I ), 1.4MHz, Synchronous Step-Down DC/DC Converter OUT LTC3405/LTC3405A 300mA (I ), 1.5MHz, Synchronous Step-Down DC/DC Converter OUT LTC3406/LTC3406B 600mA (I ), 1.5MHz, Synchronous Step-Down DC/DC Converter OUT LTC3407/LTC3407-2 Dual 600mA/810mA (I ...