LTC3534 Linear Dimensions Semiconductor, LTC3534 Datasheet
LTC3534
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LTC3534 Summary of contents
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... Other features include fi xed 1MHz operating frequency, a <1μA shutdown, short-circuit protection, programmable soft-start, current limit and thermal overload protection. The LTC3534 is available in the thermally enhanced 16-lead (3mm × 5mm) DFN and 16-lead GN packages. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. ...
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... LTC3534EGN#PBF LTC3534EGN#TRPBF LEAD BASED FINISH TAPE AND REEL LTC3534EDHC LTC3534EDHC#TR LTC3534EGN LTC3534EDE#TR Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. For more information on lead free part marking, go to: For more information on tape and reel specifi cations, go to: ...
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... Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC3534E is guaranteed to meet performance specifi cations from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls ...
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... LTC3534 www.DataSheet4U.com TYPICAL PERFORMANCE CHARACTERISTICS 4 Alkaline Cells to 5V Effi ciency vs I LOAD 100 Burst Mode 90 OPERATION 0.01 0.1 LOAD CURRENT (mA) Active Quiescent and Burst Mode SLEEP Currents vs V 425 V = 1.2V FB ACTIVE QUIESCENT CURRENT 415 405 395 385 2.4 3.2 4 INPUT VOLTAGE (V) ...
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... OUT Burst Mode OPERATION 50 7.2 8 2.4 3.2 4 4.8 5.6 INPUT VOLTAGE (V) 3534 G14 LTC3534 T = 25°C, unless otherwise noted. A Feedback Voltage vs Temperature 1.001 25mA 1.000 300mA 0.999 0.998 0.997 75 100 –50 – TEMPERATURE (°C) 3534 G09 BURST No-Load Input Current ...
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... LTC3534 www.DataSheet4U.com TYPICAL PERFORMANCE CHARACTERISTICS V Ripple at 300mA Load OUT 3. 6.4V IN 1μs/DIV V = 5V, AC-COUPLED OUT 20mV/DIV C = 22μF OUT I = 300mA LOAD Burst Mode Operation V Ripple at 25mA Load V = 50mV/DIV OUT INDUCTOR CURRENT = 200mA/DIV 10μs/DIV OUT C = 22μF ...
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... The feedback reference voltage is typically 1V. Exposed Pad (Pin 17; DHC Package): IC Substrate Ground. This pin MUST be soldered to the printed circuit board ground to provide both electrical contact and a good thermal contact to the PCB. LTC3534 to GND. A ceramic OUT and PGND IN resistor divider tap ...
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... LTC3534 www.DataSheet4U.com BLOCK DIAGRAM SW1 – 1.8A + – 2.6A + – 2.2V SHUTDOWN R SS SHUTDOWN RUN/SS AND 2 SOFT-START C SS 1MHz OSC PGND1 SW2 ANTIRING GATE DRIVERS –500mA AND SW B ANTICROSS SW C – CONDUCTION PGND1 PGND2 ...
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... Four-Switch Control Figure 1 shows a simplifi ed diagram of how the four internal switches are connected to the inductor, PV and PGND2. Figure 2 shows the regions of operation for the LTC3534 as a function of the internal control voltage Dependent on the magnitude operate in buck, buck-boost or boost mode. V ...
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... Burst Mode OPERATION Burst Mode operation reduces the LTC3534’s quiescent current consumption at light loads and improves overall conversion effi ciency, increasing battery life. During Burst Mode operation the LTC3534 delivers energy to the output until it is regulated and then enters a sleep state where ~ V ) ...
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... V IN OUT when returning to fi xed frequency mode operation, even at the same load current. To prevent this, the LTC3534 IN mA; incorporates an active clamp circuit that holds the voltage OUT < ...
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... Figure 4. Recommended Component Placement. Traces Carrying High Current are Direct. Trace Area at FB and V Kept Low. Lead Length to Battery Should be Kept Short. Keep V Inductor Selection The high frequency operation of the LTC3534 allows the use of small surface mount inductors. The inductor ripple current is typically set to 20% to 40% of the maximum inductor current ...
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... MBRM120T3 or equivalent. Do not use ordinary rectifi er diodes since their slow recovery times will compromise effi ciency. Output Voltage < 1.8V The LTC3534 can operate as a buck converter with output voltages as low as 400mV. Since synchronous switch D is powered from V cantly at output voltages below 1.8V typical, a Schottky ...
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... LTC3534 www.DataSheet4U.com APPLICATIONS INFORMATION The output fi lter zero is given by FILTER _ ZERO 2 • π • R ESR where R is the equivalent series resistance of the ESR output capacitor. A troublesome feature in boost mode is the right-half plane zero (RHP), given by RHPZ 2 • π •I • ...
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... V C BURST PWM PWM PGND1 GND PGND2 4 Alkaline/NiMH Cells to 5V Effi ciency vs I 100 Burst Mode 90 OPERATION 0.01 0 LOAD CURRENT (mA) LTC3534 V OUT 5V C 500mA R OUT FF 22μF 10k 649k 33pF 330pF Z 15k C P2 10pF R2 ...
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... TO 5.25V L1: COILCRAFT MSS7341 16 USB 500mA L1 5μH SW1 SW2 OUT 10k LTC3534 200k 10μ 33pF RUN/ 330pF 0.056μ BURST PWM PWM 10pF PGND1 GND PGND2 *NOTE: OUTPUT CURRENT CAN BE LESS THAN 500mA IF USB INPUT CURRENT LIMIT REACHED. USB to 5V Effi ...
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... PGND1 GND PGND2 Li-Ion to 3.3V Effi ciency vs I 100 Burst Mode 90 OPERATION 0.01 0 100 LOAD CURRENT (mA) LTC3534 V OUT 3.3V C 400mA R OUT FF 22μF 10k 374k 66pF 470pF Z 15k C P2 10pF R2 162k 3534 TA04a LOAD = 2 ...
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... LTC3534 www.DataSheet4U.com PACKAGE DESCRIPTION 3.50 ±0.05 1.65 ±0.05 2.20 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS PIN 1 TOP MARK (SEE NOTE 6) 0.200 REF NOTE: 1. DRAWING PROPOSED TO BE MADE VARIATION OF VERSION (WJED-1) IN JEDEC PACKAGE OUTLINE MO-229 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH ...
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... BSC .015 .004 45 .0532 – .0688 (0.38 0.10) (1.35 – 1.75) 0 – 8 TYP .008 – .012 (0.203 – 0.305) TYP INCHES LTC3534 .189 – .196* (4.801 – 4.978) .009 (0.229 REF .150 – .157** (3.810 – 3.988 ...
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... LTC3534 www.DataSheet4U.com RELATED PARTS PART NUMBER DESCRIPTION LTC3125 1. 1.5MHz, Synchronous Step-Up DC/DC SW Converter with Programmable Input Current LTC3421 3MHz, Synchronous SW Step-Up DC/DC Converter with Output Disconnect LTC3422 1. 3MHz, Synchronous SW Step-Up DC/DC Converter with Output Disconnect LTC3425 8MHz (Low Ripple), 4-Phase Synchronous SW Step-Up DC/DC Converter with Output Disconnect ...