LTC1530C Linear Technology, LTC1530C Datasheet
LTC1530C
Available stocks
Related parts for LTC1530C
LTC1530C Summary of contents
Page 1
... Shutdown mode drops the LTC1530 supply cur- rent ® The LTC1530 is specified for commercial and industrial -2, SPARC, temperature ranges and is available in the S0-8 package. , LTC and LT are registered trademarks of Linear Technology Corporation. Pentium is a registered trademark of Intel Corp. AMD- registered trademark of Advanced Micro Devices, Inc ...
Page 2
... I ........................................................ – 0.3V to 14V MAX I Input Current (Notes 2,3) ............................ – 100mA FB Operating Ambient Temperature Range LTC1530C ............................................... LTC1530I ............................................ – Maximum Junction Temperature LTC1530C, LTC1530I ...................................... 125 C Storage Temperature Range ................. – 150 C Lead Temperature (Soldering, 10 sec).................. 300 C ELECTRICAL CHARACTERISTICS range, otherwise specifications are ...
Page 3
ELECTRICAL CHARACTERISTICS range, otherwise specifications are at – SYMBOL PARAMETER V Output Voltage OUT V Output Load Regulation OUT Output Line Regulation I Operating Supply Current PVCC Quiescent Current Shutdown Supply Current f Internal Oscillator Frequency OSC Oscillator ...
Page 4
LTC1530 W U TYPICAL PERFOR A CE CHARACTERISTICS Efficiency vs Load Current 100 REFER TO FIGURE 0.3 ...
Page 5
W U TYPICAL PERFOR A CE CHARACTERISTICS Error Amplifier Open-Loop Gain vs Temperature –55 –35 – 105 125 TEMPERATURE ( C) 1530 G10 I Sink Current vs Temperature MAX 300 ...
Page 6
LTC1530 CTIO S PV (Pin 1): Power Supply for G1, G2 and Logic must connect to a potential of at least 5V, generate PV using a simple charge pump IN ...
Page 7
W BLOCK DIAGRA INTERNAL OSCILLATOR I COMP 4 COMP REF HCL MHCL MONO TEST CIRCUITS 750 0 MAX COMP LTC1530-2 100pF G2 ...
Page 8
LTC1530 TEST CIRCUITS PV CC 12V + 0 3300pF LTC1530 COMP COMP G2 V GND 3300pF OUT U U APPLICATIO S I FOR ATIO OVERVIEW The LTC1530 is a voltage feedback, synchronous switch- ing ...
Page 9
U U APPLICATIO S I FOR ATIO Typically, thermal shutdown is activated if the LTC1530’s junction temperature exceeds 150 C. G1 and G2 resume switching when the junction temperature drops below 100 C. Soft-Start and Current Limit Unlike other PWM ...
Page 10
LTC1530 U U APPLICATIO S I FOR ATIO Figure 5b is derived based on the condition that /2. Therefore, it only provides the LMAX LOAD RIPPLE minimum R value. It must be understood that during ...
Page 11
U U APPLICATIO S I FOR ATIO OPTIONAL FOR MBR0530T1 MBR0530T1 V > 6. 13V 10 F 1N5243B LTC1530 Figure 7. Doubling Charge Pump Power MOSFETs Two N-channel power MOSFETs are required for synchro- ...
Page 12
LTC1530 U U APPLICATIO S I FOR ATIO P should be calculated based primarily on required MAX efficiency or allowable thermal dissipation. A high effi- ciency buck converter designed for the Pentium II with 5V input and a 2.8V, 11.2A ...
Page 13
U U APPLICATIO S I FOR ATIO Inductor Selection The inductor is often the largest component in an LTC1530 design and must be chosen carefully. Choose the inductor value and type based on output slew rate requirements and expected peak ...
Page 14
LTC1530 U U APPLICATIO S I FOR ATIO The output capacitor in a buck converter under steady state conditions sees much less ripple current than the input capacitor. Peak-to-peak current is equal to inductor ripple current, usually 10% to 40% ...
Page 15
U U APPLICATIO S I FOR ATIO Although a mathematical approach to frequency compen- sation can be used, the added complication of input and/ or output filters, unknown capacitor ESR, and gross operating point changes with input voltage, load current ...
Page 16
LTC1530 U U APPLICATIO S I FOR ATIO Thermal Considerations Limit the LTC1530’s junction temperature to less than 125 C. The LTC1530’s SO-8 package is rated at 130 C/W and care must be taken to ensure that the worst-case input ...
Page 17
U U APPLICATIO S I FOR ATIO 0 12V (SEE TABLE) * SILICONIX SUD50N03- SANYO 10MV1200GX OR 3 SANYO OS-CON 6SH330K DEVICE LTC1530-3.3 LTC1530-3.3 ...
Page 18
LTC1530 U TYPICAL APPLICATIO (SEE TABLE) * SILICONIX SUD50N03- SANYO 10MV1200GX OR 3 SANYO OS-CON 6SH330K DEVICE LTC1530-3.3 LTC1530-3.3 LTC1530-2.8 LTC1530-2.8 LTC1530-2.5 LTC1530-2.5 LTC1530-1.9 LTC1530-1 Dual Output (3.3V and 12V) ...
Page 19
U TYPICAL APPLICATIO MBRS120 D1 MBRS120 2. 100pF 13k C C 0.022 F Other Methods to Generate 3. 3.3V 3000pF 33k LTC1530 ...
Page 20
LTC1530 U TYPICAL APPLICATIO 3.3V C3 C10 16V 16V R2 C11 47k 470 FMMD914 + 16V 16V 1 F 16V 1 5 – ...
Page 21
U TYPICAL APPLICATIO MAX 0 LTC1530-ADJ COMP SENSE GND 4.7k 1000pF C ...
Page 22
LTC1530 U TYPICAL APPLICATIO MBR0520 4 SHDN LT1317 R6 2. GND C7 R7 3000pF 300k 4 ...
Page 23
... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
Page 24
... Controller for Pentium II and Pentium III Processors LTC1772 SOT-23 Step-Down Controller LTC1873 Dual 550kHz 2-Phase Synchronous Controller with 5-Bit VID LTC1929 2-Phase Synchronous Controller PolyPhase is a trademark of Linear Technology Corporation. Linear Technology Corporation 24 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear-tech.com GND R8 ...