LTC3423 LINEAR [Linear Integrated Systems], LTC3423 Datasheet
LTC3423
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LTC3423 Summary of contents
Page 1
... Other features include shutdown, thermal shutdown and current limit. The LTC3423 and LTC3424 are available in the 10-lead MSOP package. For applications requiring an output voltage greater than 2.6V, the LTC3401 and ...
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... SHDN = 0V, Not Including Switch Leakage V = 0V, MODE/SYNC = 0V 300k (Note LTC3423 LTC3424 R = 15k 15k 5.5V MODE/SYNC I = – ORDER PART NUMBER 10 SHDN 9 V LTC3423EMS LTC3424EMS 7 V OUT PART MARKING = 125 C LTQM LTQN = MIN TYP MAX 2.7 5.5 0.5 5.5 1.5 5.5 1.22 1.25 1.28 ...
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... SHDN Input Current Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LTC3423/LTC3424 are guaranteed to meet performance specifications from Specifications over the – operating temperature range are assured by design, characterization and correlation with statistical process controls ...
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... Oscillator Frequency Accuracy 2. 15k T 2.05 2.00 1.95 1.90 –55 – 105 125 TEMPERATURE ( C) 3423/24 G09 Efficiency Loss Without Schottky vs Frequency 105 125 0.2 65 3423/24 G11 LTC3423 Current Limit 1.80 1.75 1.70 1.65 1.60 1.55 1.50 1.45 1.40 –55 – TEMPERATURE ( C) NMOS R DS(ON) 0. 1.8V OUT V = 3.3V DD 0.25 0.20 0.15 0.10 0.05 –55 – TEMPERATURE ( ...
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... IC. Tie to >1V to enable (V During shutdown the output voltage will hold minus a diode drop due to the body diode of the PMOS synchronous switch. If the application requires a com- plete disconnect during shutdown then refer to section “Output Disconnect”. LTC3423/LTC3424 – 105 125 ...
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... 2.7V TO 5.5V SYNC OSC 0.3 OUT OPTIONAL 10mV I SENSE AMP – CURRENT + LIMIT 1.6A TYP (LTC3423) – 2.8A TYP (LTC3424) – CURRENT COMP + PWM LOGIC + – SLEEP Burst Mode CONTROL SLOPE COMP P V OUT – I ZERO AMP + 1.25V ERROR R1 AMP FB – ...
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... The minimum inductance value is proportional to the operat- ing frequency and is limited by the following constraints and L f where for LTC3423, 2 for LTC3424 f = Operating Frequency (Hz) Ripple = Allowable Inductor Current Ripple (A) V IN(MIN) V OUT(MAX) LTC3423/LTC3424 ...
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... LTC3423/LTC3424 U U APPLICATIO S I FOR ATIO The inductor current ripple is typically set to 20% to 40% of the maximum inductor current. For high efficiency, choose an inductor with a high fre- quency core material, such as ferrite, to reduce core losses. The inductor should have low ESR (equivalent ...
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... Specifically, a “load feed forward” signal coupled into the V current loop a head start in providing the change in output current. The transconductance of the LTC3423 converter at the V pin with respect to the inductor current is typically C ...
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... The typical error amp compensation is shown in Figure 3. The equations for the loop dynamics are as follows: f POLE 1 which is extremelyclose ZERO 1 f POLE 2 Hz Refer to Application Note AN76 for more closed loop examples. Typical Application with Output Disconnect = 0.9V TO 1.5V IN LTC3423/LTC3424 SHDN V OUT 2 8 MODE/SYNC ...
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... BSC 4.88 0.10 DETAIL “A” (.192 .004) 0.254 (.010) 0 – 6 TYP 0.53 0.01 (.021 .006) DETAIL “A” SEATING PLANE 0.17 – 0.27 (.007 – .011) LTC3423/LTC3424 V OUT 1.8V 300mA R1 110k 249k C5 4.7pF 3423/24 TA04 0.497 0.076 (.0196 .003 ...
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... Step-Up DC/DC Converter ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 12 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com Triple Output Converter 0.1 F 0 2.2 H LTC3423 110k 10 7 SHDN V OUT ...