LTC3450 Linear Technology, LTC3450 Datasheet
LTC3450
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LTC3450 Summary of contents
Page 1
... LCD panel. A master shutdown input reduces quiescent current to <2 A and quickly discharges each output for rapid turn off of the LCD panel. The LTC3450 is offered in a low profile (0.8mm max), 3mm mizing the solution profile and footprint. , LTC and LT are registered trademarks of Linear Technology Corporation. ...
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... GND SW.......................................................... – 0 SHDN, MODE ................................................. – 0 OUT .............................................................................. V NEG ........................................................................ Operating Temperature Range LTC3450E (Note 4) ............................. – Storage Temperature Range ................. – 125 C ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T PARAMETER Input Voltage Range V Quiescent Supply Current IN V ...
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... MODE = GND (Note 3) Note 3: Measured from point at which V – C2 starts switching. Note 4: The LTC3450E is guaranteed to meet performance specifications from Specifications over the – operating temperature range are assured by design, characterization and correlation with statistical process controls. LTC3450 MIN ...
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... LTC3450 W U TYPICAL PERFOR A CE CHARACTERISTICS AV Efficiency 100 L = 100 1.5 2.0 2.5 No Load V Current in Blank Mode IN 100 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 V (V) IN 3450 G04 V vs Load GH 15.6 15.4 15.2 15.0 14.8 14.6 14.4 0 100 200 300 400 500 600 700 800 900 1000 V LOAD ( A) ...
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... AV DD 5V/DIV 5V/DIV V = 3.6V 2ms/DIV 2 Transient Response 100mV/DIV (AC) 5mA AV LOAD DD 5mA/DIV 1mA 3450 G10 Turn-On Showing Inrush DD Current Limiting INDUCTOR CURRENT 100mA/DIV 2V/DIV 0 3450 G12 V = 3.6V IN LTC3450 100 s/DIV 3450 G11 20 s/DIV 3450 G13 3450f 5 ...
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... X5R type ceramic capacitor. V configured for –15V with two external low current Schottky diodes (see Applications section). MODE (Pin 4): Drive MODE high to force the LTC3450 into high power (scan) mode. Drive MODE low to force the LTC3450 into low power (blank) mode. The output volt- ages remain active with the MODE pin driven low but with reduced output current capability ...
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... SHUTDOWN CHARGE PUMP DOUBLER IN SHUTDOWN CHARGE PUMP TRIPLER IN SHUTDOWN CHARGE PUMP INVERTER IN SHUTDOWN 9 GND LTC3450 10V will generate –5V or –10V INV . See Applications section for –15V NEG (Pin 3) on the PCB. Do not connect the NEG C2 2 CF1 – ...
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... Output Sequencing Refer to the following text and Figure 1 for the LTC3450 power-up sequence. When input power is applied, the boost converter initializes and charges its output towards the final value of 5.1V. When the boost converter output reaches approximately 90% of its final value (4 ...
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... Inductors in the range 100 H with saturation current (I ) ratings of at least 150mA are recommended SAT for use with the LTC3450. Ferrite core materials are strongly recommended for their superior high frequency performance characteristics. A bobbin or toroid type core will reduce radiated noise. Inductors meeting these re- quirements are listed in Table 1 ...
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... NEG Figure 3. Suggested Layout 5.1V, –15V, 15V Triple Output TFT-LCD Supply OUT CF1 10 0.1 F – MODE V2X LTC3450 CF2 5 13 0.1 F – SHDN C2 15 V3X 9 16 GND V INV – NEG 0.1 F CF3 0.1 F GND ...
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... Plastic QFN (3mm 3mm) (Reference LTC DWG # 05-08-1691) 0.57 0.05 PACKAGE OUTLINE 0.23 0.05 0.50 BCS 0.75 0.05 3.00 0.10 (4 SIDES) PIN 1 TOP MARK 1.45 0.10 MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE LTC3450 BOTTOM VIEW—EXPOSED PAD R = 0.115 0.40 0.10 TYP (4-SIDES) (UD) QFN 0802 0.200 REF 0.23 0.05 0.00 – 0.05 ...
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... McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 5.1V, – 5V, 15V Triple Output TFT-LCD Supply OUT CF1 10 0.1 F – MODE V2X LTC3450 CF2 5 13 0.1 F – SHDN C2 15 V3X 9 16 GND V INV – NEG CF3 0.1 F COMMENTS ...